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iwatsu_ss-7810_05_04


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  Service Manual

    Oscilloscope

SS-7810/05/04
Introduction
       Thank you very much for your purchase of Iwatsu electronic measuring instruments.
       Please adjust or calibrate your instrument after throughly reading this service manual
       and understanding its contents. After reading this manual, please keep it for future
       reference.


Cautions for safe use
   Matters that must be observed for operation of this instrument and for prevention of injury to
   humans and damage to property are described as " warnings" and " cautions" in this
   service manual.


   Explanation of "     Warnings" and "       Cautions" coulmns in this manual

                          Incorrect operation or failure to need warnings may result in death
            Warning
                          or serious injury.
                          Incorrect operation or failure to need cautions may result in injury
            Caution       or damage to equipment.


Cautions
       Parts of the contents of this service manual may be modified without notice to
       accommodate improvements in performance and function.
       Reproduction of the contents of this service manual without previous consent is
       prohibited.


History
       Jan. 2004 : Issue of the 1st edition




KML045311                                                                           A1-523150(B)
                                              0-1
                                                  Warnings
Use care when servicing with power on:
Dangerous voltages exist at several points in this product. To avoid personal injury, do not
touch exposed connections or components while power is on.
Disconnect power before removing protective panels, soldering, or replacing components.




                                                  Cautions
    Never place a heavy substance on the power cord:
    It will cause an electric shock or fire.

    Prior to connecting or disconnecting the power cord, set the power supply to STBY:
    Its negligence will cause an electric shock or trouble.

    Use the specified AC power to operate the instrument:
    Use of non-specified power will cause an electric shock, fire, or trouble. The available AC
    power supplies are as follows:
           Supply voltage        : 90 to 132V AC/180 to 250V AC
           Frequency             : 48 to 440Hz
           Power consumption : Max. 110VA

    Use a 3-core power cord suitable to the supply voltage:
    Use of other cord will an electric shock or fire.

    When replacing a fuse, be sure to use our specified one ( 5 20mm, 250VA, 2A, slow):
    Use of other fuse will cause a fire or trouble.

    Do not place any substance near the air vent of this instrument or fan:
    It will cause a fire or trouble.

    Use the instrument within the specified operating range:
    Otherwise, it will cause a trouble. An available temperature range is as follows:
           Temperature             : 0 to 40
           Relative humidity       : 90% RH(40 )

    Do not apply an overvoltage to the input terminal:
    It will cause a trouble. A maximum allowable input voltage is as follows:
              CH1, CH2, CH3 (EXT):
              Directly : Max. 400V
              When the SS-087R (10:1) or SS-088 (1:1, 10:1) probe is used:
              At 10:1 : Max. 600V
              At 1:1 : Max. 400V

[NOTE] The maximum input voltage decreases depending on frequency and high voltage pulse of the input signal.


                                                     0-2
                                                        Table of Contents
Introduction .................................................................................................................................................... 0-   1
Caution for safe use ...................................................................................................................................... 0-         1
Warnings ....................................................................................................................................................... 0-    2
Cautions ........................................................................................................................................................ 0-   2

Section 1 Specifications ................................................................................................................................. 1- 1

Section 2 Check and Adjustment
2.1 Knowledge Required before Beginning Adjustment .............................................................................. 2- 1
  2.1.1 Introduction .................................................................................................................................... 2- 1
  2.1.2 Check and Adjustment Intervals ..................................................................................................... 2- 1
  2.1.3 Menu Screen .................................................................................................................................. 2- 1
             Menu Tree SS-7810/05/04 ........................................................................................................ 2- 2
             Manual Adjustment Menu .......................................................................................................... 2- 3
             Menu Screen (f:MAN-ADJ, AUTO-ADJ, AUTO-CONF) ............................................................. 2- 4
             Key Function/Movement in Adjustment Menu ............................................................................ 2- 5
  2.1.4 Check and Adjustment Method ....................................................................................................... 2- 6
             Check/Adjustment Procedure Flow Chart SS-78** .................................................................... 2- 6
             Automatic Adjustment Items ...................................................................................................... 2- 7
             Automatic Comfirmetion Items .................................................................................................. 2- 8
             The Check/Adjustment Items and Sequence With Jig IE-1066 ................................................. 2- 9
             The Check/Adjustment Items and Sequence Without Jig IE-1066 ............................................ 2- 10
  2.1.5 Check and Adjustment Affected Item .............................................................................................. 2- 11
  2.1.6 Test Equipment Required ............................................................................................................... 2- 12
  2.1.7 Preparation for Check and Adjustment ........................................................................................... 2- 14
  2.1.8 Connection the Adjustment Jig IE-1066 to the SS-78** .................................................................. 2- 15
  2.1.9 Check and Adjustment Locations ................................................................................................... 2- 16
             POWER BOARD ....................................................................................................................... 2- 16
             ANA BOARD ......................................................................................................................... 2- 17
             ANA BOARD ......................................................................................................................... 2- 18
             HV BOARD ............................................................................................................................... 2- 19
             V MAIN BOARD                (SS-7810) .................................................................................................. 2- 20
2.2 DC Power Supply .................................................................................................................................. 2- 21
2.3 CRT Display .......................................................................................................................................... 2- 22
  2.3.1 CRT Cathode Voltage ..................................................................................................................... 2- 22
  2.3.2 CRT Heater Voltage ....................................................................................................................... 2- 22
  2.3.3 Focus ............................................................................................................................................. 2- 23
  2.3.4 Intensity .......................................................................................................................................... 2- 23
  2.3.5 Trace Rotation ................................................................................................................................ 2- 24
  2.3.6 Orthogonality .................................................................................................................................. 2- 25
2.4 Check the Key Function in Automatic Confirmation Mode ..................................................................... 2- 26
2.5 Gain (Coarse) ....................................................................................................................................... 2- 27
  2.5.1 Vertical Gain ................................................................................................................................... 2- 27
  2.5.2 Horizontal Gain ............................................................................................................................... 2- 28
  2.5.3    V Readout Gain .......................................................................................................................... 2- 28
  2.5.4    t Readout Gain ............................................................................................................................ 2- 29
2.6 Crystal Oscillation Frequency ................................................................................................................ 2- 29
2.7 Balance Coarse .................................................................................................................................... 2- 30
  2.7.1 Balance Coarse (Automatic Adjustment Menu "D, L") .................................................................... 2- 30
  2.7.2 Magnification Gain .......................................................................................................................... 2- 31


                                                                                  0-3
2.8 Vertical Deflection System .................................................................................................................... 2- 32
  2.8.1 Flatness CHI/CH2/CH3 (SS-7810) ................................................................................................. 2- 32
  2.8.2 Attenuator Compensation CH1/CH2 ............................................................................................... 2- 33
  2.8.3 Attenuator Compensation CH3 (SS-7810)...................................................................................... 2- 34
  2.8.4 High-frequency Compensation CH1/CH2 ....................................................................................... 2- 34
  2.8.5 High-frequency Compensation CH3 (SS-7810) .............................................................................. 2- 35
  2.8.6 Bandwidth ....................................................................................................................................... 2- 36
2.9 Horizontal Deflection System ................................................................................................................ 2- 37
  2.9.1 High-speed Sweep Rate ................................................................................................................. 2- 37
  2.9.2 Sweep Linearity at High-speed Sweep Rate (SS-7810) .................................................................. 2- 38
2.10 Calibrator Output ................................................................................................................................... 2- 39
2.11 Automatic Adjustment ........................................................................................................................... 2- 40
  2.11.1 Automatic Adjustment Item ............................................................................................................. 2- 42
  2.11.2 Error Message ................................................................................................................................ 2- 43
2.12 Automatic Confirmation ......................................................................................................................... 2- 50
  2.12.1 Automatic Confirmation Items ........................................................................................................ 2- 51
2.13 Manual Adjustment Menu ..................................................................................................................... 2- 52
  2.13.1 Manual Adjustment Items ............................................................................................................... 2- 53
  2.13.2 Vertical Gain ................................................................................................................................... 2- 55
  2.13.3 Trigger ............................................................................................................................................ 2- 56
  2.13.4 X-Y Gain and Position .................................................................................................................... 2- 57
  2.13.5 Manual Adjustment Procedure ....................................................................................................... 2- 58
2.14 Adjustment Jig IE-1066 ......................................................................................................................... 2- 72
  2.14.1 Specifications ................................................................................................................................. 2- 72
  2.14.2 Preparation ..................................................................................................................................... 2- 72
  2.14.3 Adjustment of IE-1066 .................................................................................................................... 2- 73
  2.14.4 Schematic Diagram ........................................................................................................................ 2- 75

Section 3 Block Diagram
     SS-7810 Block Diagram ........................................................................................................................ 3- 1
     SS-7805/04 Block Diagram ................................................................................................................... 3- 7

Section 4 Electrical Parts List
 SS-7810 Parts List
     CH1 ATTENUATOR 1 ........................................................................................................................ 4- 10
     CH2 ATTENUATOR 2 ........................................................................................................................ 4- 12
     CH3 ATTENUATOR 3 ........................................................................................................................ 4- 14
     CH1 1ST PREAMP 4 ......................................................................................................................... 4- 15
     CH2 1ST PREAMP 5 ......................................................................................................................... 4- 17
     CH1 2ND PREAMP 6 ......................................................................................................................... 4- 18
     CH2 2ND PREAMP 7 ......................................................................................................................... 4- 19
     CH3 PREAMP 8 ................................................................................................................................. 4- 20
     CH SW & DRY LINE DRIV 9 .............................................................................................................. 4- 22
     V CHARA AMP 10 .............................................................................................................................. 4- 23
     V MAIN AMP 11 ................................................................................................................................. 4- 24
     V OUTPUT AMP 12 ........................................................................................................................... 4- 25
     CH1 TRIG PREAMP 13 ..................................................................................................................... 4- 26
     CH2 TRIG PREAMP 14 ..................................................................................................................... 4- 28
     CH3 TRIG PREAMP 15 ..................................................................................................................... 4- 29
     A/B TRIG SELECT 16 ........................................................................................................................ 4- 30
     A TRIG AMP 17 .................................................................................................................................. 4- 31
     B TRIG AMP 18 ................................................................................................................................. 4- 32
     TV SYNC SEP 19 .............................................................................................................................. 4- 33


                                                                                0-4
    TLC CIRCUIT 20 ................................................................................................................................ 4- 34
    A SAWTOOTH BUFF 21 .................................................................................................................... 4- 35
    B SAWTOOTH BUFF 22 ................................................................................................................... 4- 36
    A TIMING 23 ...................................................................................................................................... 4- 37
    B TIMING 24 ...................................................................................................................................... 4- 38
    H & Z SW 25 ...................................................................................................................................... 4- 39
    H MAIN AMP 26 ................................................................................................................................. 4- 41
    H OUTPUT AMP 27 ........................................................................................................................... 4- 42
    Z AMP 28 ........................................................................................................................................... 4- 43
    PROBE SENCE 29 ............................................................................................................................ 4- 44
    ANA BOARD CONTROL 30 ............................................................................................................... 4- 45
    ANA BOARD 8 BIT D/A 31 ................................................................................................................. 4- 45
    CRT CONT BOARD 32 ...................................................................................................................... 4- 46
    H.V. CIRCUIT 33 ................................................................................................................................ 4- 47
    CPU BOARD 35 ................................................................................................................................. 4- 49
      36 (missing number)
    PANEL BOARD 37 ............................................................................................................................. 4- 51
    KEY BOARD 38 ................................................................................................................................. 4- 51
    POWER 39 ........................................................................................................................................ 4- 52
    OVER ALL 40 ..................................................................................................................................... 4- 54
SS-7805/04 Parts List
    CH1 ATTENUATOR 1 ........................................................................................................................ 4- 56
    CH2 ATTENUATOR 2 ........................................................................................................................ 4- 58
    EXT TRIG IN 3 ................................................................................................................................... 4- 60
    CH1 1st PREAMP 4 ........................................................................................................................... 4- 61
    CH2 1st PREAMP 5 ........................................................................................................................... 4- 63
    CH1 2nd PREAMP 6 .......................................................................................................................... 4- 65
    CH2 2nd PREAMP 7 .......................................................................................................................... 4- 66
    CH SW & DRY LINE DRIV 9 .............................................................................................................. 4- 67
    V CHARA AMP 10 .............................................................................................................................. 4- 68
    V MAIN AMP 11 ................................................................................................................................. 4- 69
    V OUTPUT AMP 12 ........................................................................................................................... 4- 71
    CH1 TRIG PREAMP 13 ..................................................................................................................... 4- 72
    CH2 TRIG PREAMP 14 ..................................................................................................................... 4- 73
    A TRIG SELECT 16 ........................................................................................................................... 4- 74
    A TRIG AMP 17 .................................................................................................................................. 4- 75
    TV SYNC SEP 19 .............................................................................................................................. 4- 77
    TLC CIRCUIT 20 ................................................................................................................................ 4- 78
    A SAWTOOTH BUFF 21 .................................................................................................................... 4- 79
    A TIMING 23 ...................................................................................................................................... 4- 80
    H & Z SW 25 ...................................................................................................................................... 4- 81
    H MAIN AMP 26 ................................................................................................................................. 4- 83
    H OUTPUT AMP 27 ........................................................................................................................... 4- 85
    Z AMP 28 ........................................................................................................................................... 4- 87
    PROBE SENCE 29 ............................................................................................................................ 4- 89
    ANA BOARD CONTROL 30 ............................................................................................................... 4- 89
    ANA BOARD 8 bit D/A 31 ................................................................................................................... 4- 89
    CPU BOARD 35 ................................................................................................................................. 4- 89
    PANEL BOARD 37 ............................................................................................................................. 4- 90
    V MAIN BOARD .................................................................................................................................... 4- 90
    CRT CONT BOARD 32 ...................................................................................................................... 4- 91
    H.V. CIRCUIT 33 ................................................................................................................................ 4- 92
    CPU BOARD 35 ................................................................................................................................. 4- 94


                                                                             0-5
       KEY BOARD 38 ................................................................................................................................. 4- 96
       SS-78LVPS(100M) POWER 39 ......................................................................................................... 4- 97
       OVER ALL 40 ..................................................................................................................................... 4-100

Selection 5 Schematic Diagrams
SS-7810
     CH1/CH2 ATTENUATOR 1 2 .......................................................................................................... 5- 1
     CH3 ATTENUATOR 3 ........................................................................................................................ 5- 2
     CH1/CH2 1st PREAMP 4 5 ............................................................................................................. 5- 3
     CH1 2nd PREAMP 6 .......................................................................................................................... 5- 4
     CH2 2nd PREAMP 7 .......................................................................................................................... 5- 5
     CH3 PREAMP 8 ................................................................................................................................. 5- 6
     CH SW & DRY LINE DRIV 9 .............................................................................................................. 5- 7
     V CHARA AMP 10 .............................................................................................................................. 5- 8
     V MAIN AMP 11 ................................................................................................................................. 5- 9
     V OUTPUT AMP 12 ........................................................................................................................... 5- 10
     CH1 TRIG PREAMP 13 ..................................................................................................................... 5- 11
     CH2/3 TRIG PREAMP 14 15 .......................................................................................................... 5- 12
     A/B TRIG SELECT 16 ........................................................................................................................ 5- 13
     A/B TRIG AMP 17 18 ...................................................................................................................... 5- 14
     TV SYNC SEP 19 .............................................................................................................................. 5- 15
     TLC CIRCUIT 20 ................................................................................................................................ 5- 16
     A/B SAWTOOTH BUFF 21 22 ........................................................................................................ 5- 17
     A/B TIMING 23 24 ........................................................................................................................... 5- 18
     H & Z SW 25 ...................................................................................................................................... 5- 19
     H MAIN AMP 26 ................................................................................................................................. 5- 20
     H OUTPUT AMP 27 ........................................................................................................................... 5- 21
     Z AMP 28 ........................................................................................................................................... 5- 22
     PROBE SENCE 29 ............................................................................................................................ 5- 23
     ANA BOARD CONTROL 30 ............................................................................................................... 5- 24
     ANA BOARD 8 BIT D/A 31 ................................................................................................................. 5- 25
     CRT CONT BOARD 32 ...................................................................................................................... 5- 26
     H.V. CIRCUIT 33 ................................................................................................................................ 5- 27
     CPU BOARD 35 ................................................................................................................................. 5- 29
     PANEL BOARD 37 ............................................................................................................................. 5- 33
     KEY BOARD 38 ................................................................................................................................. 5- 34
     POWER 39 ........................................................................................................................................ 5- 35
     OVER ALL 40 ..................................................................................................................................... 5- 36
SS-7805/04
     CH1/CH2 ATTENUATOR 1 2 .......................................................................................................... 5- 38
     EXT TRIG IN 3 ................................................................................................................................... 5- 39
     CH1/2 1st PREAMP 4 5 .................................................................................................................. 5- 40
     CH1 2nd PREAMP 6 .......................................................................................................................... 5- 41
     CH2 2nd PREAMP 7 .......................................................................................................................... 5- 42
     CH SW & DRY LINE DRIV 9 .............................................................................................................. 5- 43
     V CHARA AMP 10 .............................................................................................................................. 5- 44
     V MAIN AMP 11 ................................................................................................................................. 5- 45
     V OUTPUT AMP 12 ........................................................................................................................... 5- 46
     CH1 TRIG PREAMP 13 ..................................................................................................................... 5- 47
     CH2 TRIG PREAMP 14 ..................................................................................................................... 5- 48
     A TRIG SELECT 16 ........................................................................................................................... 5- 49
     A TRIG AMP 17 .................................................................................................................................. 5- 50
     TV SYNC SEP 19 .............................................................................................................................. 5- 51


                                                                              0-6
       TLC CIRCUIT 20 ................................................................................................................................ 5- 52
       A SAWTOOTH BUFF 21 .................................................................................................................... 5- 53
       A TIMING 23 ...................................................................................................................................... 5- 54
       H & Z SW 25 ...................................................................................................................................... 5- 55
       H MAIN AMP 26 ................................................................................................................................. 5- 56
       H OUTPUT AMP 27 ........................................................................................................................... 5- 57
       Z AMP 28 ........................................................................................................................................... 5- 58
       PROBE SENCE 29 ............................................................................................................................ 5- 59
       ANA BOARD CONTROL 30 ............................................................................................................... 5- 60
       ANA BOARD 8 BIT D/A 31 ................................................................................................................. 5- 61
       CRT CONT BOARD 32 ...................................................................................................................... 5- 62
       H.V. CIRCUIT 33 ................................................................................................................................ 5- 63
       CPU BOARD 35 ................................................................................................................................. 5- 64
       PANEL BOARD 37 ............................................................................................................................. 5- 68
       KEY BOARD 38 ................................................................................................................................. 5- 69
       POWER BOARD 39 .......................................................................................................................... 5- 70
       OVER ALL 40 ..................................................................................................................................... 5- 71

Selection 6 Mechanical Parts Lists and Illstration .......................................................................................... 6- 1




                                                                              0-7
Section 1 Specifications          1

Section 2 Check and Adjustment    2

Section 3 Block Diagram           3

Section 4 Electrical Parts List   4

Section 5 Schematic Diagrams      5

Section 6 Mechanical Parts List   6
               and Illustration
                           1



Section 1 Specifications
SS-7810

CRT
  Type                               6 inch, diagonal rectangular flat face, intemal graticule, meshelss
                                     CRT with graticule illumination
   Display area                      8 div    10 div (1 div 10 mm)
   Accelerating voltage              Approx. 16 kV

Vertical defection system (Y axis)
   Vertical mode                     CH1, CH2, CH3, ADD, ALT/CHOP
   CH1, CH2                          CHOP mode switching rate 555 kHz        1%
     Deflection factor
        Range                        2 mV/div to 5 Vdiv, 1-2-5 sequence, 11 steps
        Variable control range       2 mV/div to 12.5 V/div continuously variable
        Accuracy                        2%
     Frequency characteristics
        Bandwidth
            5 mV to 5 V/div          DC to 100 MHz 3 dB
            2 mV/div                 DC to 50 MHz 3 dB
        Band width limiter           DC to approx. 20 MHz
                                     [Note] AC coupled low cutoff frequency (    3 dB) is 4 Hz.
   Rise time                         Approx. 3.5 ns
                                     [Note] Rise time Tr is calculate from:

                                                 350
                                     Tr                     [ns]
                                            Bandwidth [MHz]

   Step response                     at 10 mV/div, with 50    termination
     Over shoot                      3%
     Sag (at 1 KHz)                  1%
   Signal delay                      At least 30 ns of the sweep is displayed before the triggering event.
   Input coupling                    AC, DC, GND
   Input RC                          1M         1.5 % // 20pF    2pF
   Maximum input voltage                400 V MAX
   Position control range            Approx. 10 div from the center line of the screen
   Invert                            Available on CH2
   ADD
     Accuracy of sum (at 1 kHz)         3%
     Frequency characteristics       DC to 60 MHz 3 dB
     Common-mode rejection ratio     at 10 mV/div
     1 kHz sin wave                  50:1
     20 MHz sine wave                15:1
   Dynamic range                     Overranging the screen at 100 MHz in the case of 10 mV/div
   Probe sense                       10:1, 100:1 detection




                                              1-1
   CH3
    Deflection factor
       Range                  50 mV/div, 100 mV/div, 500 mV/div
       Accuracy                  2%
    Bandwidth                 DC to 100 MHz 3 dB
    Rise time                 Approx. 3.5 ns
                              [Note] Rise time Tr is calculate from:

                                          350
                              Tr                     [ns]
                                     Bandwidth [MHz]

     Step response            at 50 mV/div, with 50 termination
         Over shoot           6%
         Sag (at 1 KHz)       1 % [Note] AC coupled low cutoff frequency ( 3 dB) is 10 Hz
     Imput coupling           AC, DC
     Input RC                 1M       1.5 % // 20 pF 3pF
     Maximum input voltage       400 V MAX
     Position control range   Approx.    10 div from the center line of the screen
     Dynamic range            Overranging the screen at 100 MHz
     Probe sense              10:1, 100:1 detection
Triggering
   A triggering
     Trigger sensitivity                    Frequency                  P.P signal amplitude
                                 DC to 10 MHz                                 0.4 div
                                 10 MHz to 100 MHz                            1.0 div
                              [Note] TV : The ratio between the composite video signal and
                                          synchronization signal is 7:3 and synchronization signal
                                          amplitude is 1.5 div or more.
                                     HF-REJ : Attenuates at 10 kHz or more
                                     LF:REJ : Attenuates at 10 kHz or less
     Trigger level range        9.5 div or more (set range: 10 div)
     Signal source            CH1, CH2, CH3, LINE, VERT
     Coupling                 AC, DC, HF-REJ, LF-REJ
     Slope                      ,
   B triggering
     Trigger sensitivity                     Frequency               P.P signal amplitude
                                 DC to 10 MHz                               0.4 div
                                 10 MHz to 100 MHz                          1.0 div
                              [Note] HF-REJ : Attenuates at 10 kHz or more
                                     LF-REJ : Attenuates at 10 kHz or less
    Trigger level range          9.5 div or more (set range: 10 div)
    Signal souroe             CH1, CH2, CH3
    Coupling                  AC, DC, HF-REJ, LF-REJ
    Slope                       ,
    TV mode                   NTSC, PAL, (SECAM)
    TV synchronization        ODD, EVEN, BOTH TV-H
                                [Note] ODD/EVN, or BOTH can be seiected
                                    NTSC: 5 H to 2000 H
                                    PAL (SECAM), HDTV: 2 H to 1997 H



                                       1-2
  AUTO SETUP
     Channels                                Avallable CH1 and CH2
     Frequency                               50 Hz to 50 MHz
Horizontal deflection system (X axis)
  Horizontal display                         A, ALT, B, X-Y
  A sweep
     Sweep mode                              AUTO, NORMAL SINGLE
     Sweep rates
       Maximum sweep                         2 ns/div
       Range                                 20 ns to 500 ms/div 1-2-5 sequence, 23 steps
       Variable range                        20 ns to 1.5 s/div
       Accuracy                                 2 % over center 8 div
       Accuracy                                 5 % over center any 2 div within center 8 div
     Hold-off time                           Countinuously variable
  B sweep
     Delay                                   Triggered delay or continuous delay (RUNS AFTER)
     Sweep rates
       Maximum sweep                         2 ns/div
       Range                                 20 ns to 5 ms/div 1-2-5 sequence, 17 steps
       Accuracy                                 2 % over center 8 div
       Accuracy                                 5 % over center any 2 div within center 8 div
     Delay time
       Position control range                0.2 to 10.2 div
       Accuracy                                 [(set value   0.005) (sweep rate      0.1)] 55 ns with in range
                                             of 1 s/div to 500 ms/div
       Delay pick off jitter                 1/2000, at 1 ms/div of A sweep:, at 500 ns/div of B sweep
     Sweep magnification
       Magnifying ratio                        10 times
       Accuracy                                over center 8 div
           20 ns/div, 50 ns/div                   5%
           100 ns/div to 500 ms/div               3%
       * Accuracy
        1
                                               Over any 2 div within center 8 div
           20 ns/div, 50 ns/div                   8%
           100 ns/div to 500 ms/div               5%
       *1 30 ns or 1 div at the beginning of sweep and 30 ns at the end of sweep are excluded.
   X-Y operation
       X axis (CH1)
          Deflection factor                    Same as CH1
           Accuracy                               4%
           Bandwidth                           DC to 2 MHz, 3 db
       Y axis                                  CH1, CH2, CH3, ADD
       Phase difference between       axis and Y axis
                                               3' or less (DC to 200 kHz)
   CAL (Probe calibration signal)
       Waveform                                Rectangular wave
       Fraquency                               1 kHz      0.1 %
       Duty ratio                              49 % to 51 %
       Output voltage                          0.6 V     1%



                                                      1-3
  Measurement with cursors and counter
      Measurement with cursors
        Type of measurement              Time difference (      t), Voltage difference (    V)
        Cursor position control range
          X axis                           (5       0.2) div from the center line of the screen
          Y axis                           (4       0.2) div from the center line of the screen
      Accuracy
        Voltage difference ( V)            [(2 % of reading)       (0.3 % of full scale)]
        Time difference ( t)
          MAG OFF                          [(2 % of reading)       (0.3 % of full scale)]
          MAG ON (MAG         10)
             500 ms to 100 ns/div          [(3 % of reading)       (0.3 % of full scale)]
             50 ns, 20 ns/div              [(5 % of reading)       (0.3 % of full scale)]
      Counter
        Number of digits displayed       5 digits
        Accuracy                            0.01 %
        Frequency measurement range      2 Hz to 100 MHz
  Saving data                            Backup by built-in battery
      Type of date to be saved           Panel setup conditions immediately before turning power off *2
                                         Storing of panel setup conditions *3 (SS-7821/11)
                                         *2 The state where the power cord is disconnected.
                                         *3 The maximum number of date items that can be stored: 32
     Data retention time                 Approx. 30000H (at approx. 25 )
  Power source
     Voltage range                       90 to 132 VAC / 180 to 250 VAC
     Frequency range                     48 to 440 Hz
     Power consumption                   110 VA MAX

  Mass and Dimension
     Mass                                Approx. 7.5 kg (without accessories)
     Dimension                           Approx. 272W      152 H    390 L [mm]
                                         [Note] Without accessories, and projections.

Environmental condtions
  Specification assurance temperature    10 to 35
  Operating
        Temperature                      0 to 40
        Humidity                         90 % RH or less (at 40       )
  Storage
        Temperature                        20 to 70
        Humidlty                         80 % RH or less (at 70       )
  Altitude
        Operating                        5000 m, atmospheric pressure: Approx. 55 kPa
        Nunoperating                     15000 m, atmospheric pressure: Approx. 12 kPa
        Vibration                        15 minutes along each of three axes at a total displacement of 0.67
                                         mmp. p with frequency Varied from 10 Hz to 55 Hz in 1 minute sweep.




                                                    1-4
Shock               Lifting a side to a height of 10 cm and dropping it naturally onto hard
                    wood: 4 times on each side.
Dropping packaged   Dropping an instrument packaged for transportation from a height of
                    90 cm.
Warm up time        The specifications for this instrument are the assured values after
                    more than 30 min of power on.




                             1-5
SS-7805/04

CRT
  Type                                6 inch, diagonal rectangular flat face, internal graticule, meshelss
                                      CRT with graticule illumination
   Display area                       8 div    10 div (1 div 10 mm)
   Accelerating voltage               Approx. 16 kV

Vertical deflection system (Y axis)
   Vertical mode                      CH1, CH2, ADD, ALT/CHOP
   CH1, CH2                           CHOP mode switching rate 555 kHz         1%
     Deflection factor
        Range                         2 mV/div to 5 V/div, 1-2-5 sequence, 11 steps
        Variable control range        2 mV/div to 12.5 V/div continuously variable
        Accuracy                         2%
     Frequency characteristics
        Bandwidth
            5 mV to 5 V/div           DC to 40 MHz     3 dB (SS-7804) / DC to 50 MHz       3 dB (SS-7805)
            2 mV/div                  DC to 20 MHz     3 dB (SS-7804) / DC to 20 MHz       3 dB (SS-7805)
   Rise time
        SS-7804                       Approx. 8.75 ns
        SS-7805                       Approx. 7.0 ns
                                      [Note] Rise time Tr is calculate from:

                                                  350
                                      Tr                     [ns]
                                             Bandwidth [MHz]

   Step response                      at 10 mV/div, 50     termination
     Over shoot                       3 % (SS-7804) / 8 % (SS-7805)
     Sag (at 1 kHz)                   1 % (SS-7804) / 1 % (SS-7805)
   Signal delay                       At least 30 ns of the sweep is displayed before the triggering event.
   Input coupling                     AC, DC, GND
   Input RC                           1M         1.5 % // 25 pF    2 pF
   Maximum input voltage                 400 V (DC+ACpeak)
   Position control range             Approx. 10 div from the center line of the screen
   Invert                             Available on CH2
   ADD
     Accuracy of sum (at 1 kHz)         3%
     Frequency characteristics        DC to 20 MHz      3 dB
     Common-mode rejection ratio
       50:1                           1 kHz sine wave
       15:1                           20 MHz sine wave
   Dynamic range                      Overranging the screen at 40 MHz (SS-7804)
                                      Overranging the screen at 50 MHz (SS-7805)
   Probe sense
     Attached probe                   No function.
     Optional probe                   10:1, 100:1 detection




                                               1-6
Triggering
   Trigger sensitivity                             Frequency               CH1, CH2         EXT
                                         DC to 5 MHz                         0.4 div       80 mV
                                         5 MHz to 40 MHz (SS-7804)
                                                                             1.0 div      200 mV
                                         5 MHz to 50 MHz (SS-7805)
                                        [Note] TV : The ratio between the composite video signal and
                                                    synchronization signal is 7:3 and synchronization signal
                                                    amplitude is 1.5 div or more.
                                               HF-REJ : Attenuates at 10 kHz or more
                                               LF-REJ : Attenuates at 10 kHz or less
    Trigger level range                    9.5 div or more (set range: 10 div)
    Signal source                       CH1, CH2, EXT, LINE, VERT
    Coupling                            AC, DC, HF-REJ, LF-REJ
    Slope                                  ,
   TV mode                              NTSC, PAL (SECAM)
   TV synchronization                   ODD, EVEN, BOTH TV-H
                                        [Note] ODD, EVEN, or BOTH can be selected
                                                NTSC: 5 H to 2000 H
                                                PAL (SECAM): 2 H to 1997 H
   EXTTRIG
    Input RC                            1 MW 2 % // 25 pF 3 pF
    Input coupling                      DC
    Maximum input voltage                 400 V (DC+ACpeak)
    Probe sence                         10:1 and 100:1 detection with an optional probe (SS-78R)

Horizontal deflection system (X axis)
  Horizontal display                    A, X-Y
     Sweep mode                         AUTO, NORMAL SINGLE
     Sweep rates
        Maximum sweep                   10 ns/div
        Range                           100 ns to 500 ms/div
        Variable range                  100 ns to 1.25 s/div
        Accuracy                           2 % over center 8 div
        Accuracy                           5 % over center any 2 div within center 8 div
     Hold-off time                      Countinuously variable
  Sweep magnification
     Magnifying ratio                   10 times
     Accuracy                           over center 8 div
        100 ns/div to 200 ns/div           5%
        500 ns/div to 500 ms/div           3%
     *1 Accuracy                        Over any 2 div within center 8 div
        100 ns/div to 200 ns/div           8%
        500 ns/div to 500 ms/div           5%




                                                1-7
X-Y operation
    X axis (CH1)
      Deflection factor                        Same as CH1
        Accuracy                                 3%
        Bandwidth                              DC to 2 MHz 3 dB
    Y axis                                     CH1, CH2, ADD
    Phase difference between   axis and Y axis 3 or less (DC to 50 kHz)

CAL (Probe calibration signal)
   Waveform                                  Rectangular wave
   Fraquency                                 1 kHz    0.1 %
   Duty ratio                                49 to 51 %
   Output voltage                            0.6 V    1%

Measurement with cursors and counter
   Measurement with cursors
     Type of measurement             Time difference ( t), Voltage difference ( V)
     Cursor position control range
       X axis                           (5    0.2) div from the center line of the screen
       Y axis                           (4    0.2) div from the center line of the screen
   Accuracy
     Voltage difference ( V)            [(2 % of reading)     (0.3 % of full scale)]
     Time difference ( t)
       MAG OFF                          [(2 % of reading)     (0.3 % of full scale)]
       MAG ON (MAG        10)
          100 ns, 200 ns/div            [(5 % of reading)     (0.3 % of full scale)]
          500 ns to 500 ms/div          [(3 % of reading)     (0.3 % of full scale)]
   Counter
     Number of digits displayed      5 digits
     Accuracy                           0.01 %
     Frequency measurement range
       SS-7804                       2 Hz to 40 MHz
       SS-7805                       2 Hz to 50 MHz

Saving data                                  Backup by built-in battery
    Type of date to be saved                 Panel setup conditions immediately before turning power off *2
                                             *2 The state where the power cord is disconnected.
    Data retention time                      Approx. 30,000H (at approx. 25 )

Power source
   Voltage range                             90 to 132 VAC / 180 to 250 VAC
   Frequency range                           48 to 440 Hz
   Power consumption                         110 VA MAX

Mass and Dimension
   Mass                                      Approx. 7.5 kg (without accessories)
   Dimension                                 Approx. 272W      152 H    390 L [mm]
                                             [Note] Without accessories, and projections.



                                                     1-8
Environmental conditions
  Specification assurance temperature   10 to 35
  Operating
        Temperature                     0 to 40
        Humidity                        90 % RH or less (at 40     )
  Storage
        Temperature                      20 to 70
        Humidity                        80 % RH or less (at 70     )
  Altitude
        Operating                       5,000 m, atmospheric pressure : Approx. 55 kPa
        Nunoperating                    15,000 m, atmospheric pressure : Approx. 12 kPa
  Vibration                             15 minutes along each of three axes at a total displacement of 0.67
                                        mmp. p with frequency Varied from 10 Hz to 55 Hz in 1 minute sweep.
  Shock                                 Lifting a side to a height of 10 cm and dropping it naturally onto hard
                                        wood: 4 times on each side.
  Dropping packaged                     Dropping an instrument packaged for transportation from a height of
                                        90 cm.
  Warm up time                          The specifications for this instrument are the assured values after
                                        more than 30 min of power on.




                                                   1-9
                                      SS-501 (CH2 OUT, Z AXIS IN)

Factory option for the SS-7800 series.
   SS-501 : SS-7804/7805

CH2 OUT connector (rear panel)
  Outputs a sample of the signal applied to the CH2 signal input.

Z AXIS IN connector (rear panel)
   Input a signal for an intensity modulation on screen.

Specification
   CH2 OUT
      Deflection factor             45 mV 20 % per one division screen amplitude (at 50   load)
      DC level                         100 mV (at 50 load)
      Output coupling               DC
      Bandwidth                     20 MHz 



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