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35670-90053


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The Agilent 35670A at a Glance (Front Panel)
Agilent 35670A Front Panel

1-Use the softkeys to select items from the current    10-Use the MEASUREMENT keys to control the
menu. A softkey's function is indicated by a video     analyzer's source and inputs. They also control
label on the analyzer's screen. Throughout this        measurement parameters. You must make a new
book, softkeys are printed like this:                  measurement if you change a
[FFT ANALYSIS].                                        MEASUREMENT parameter.
Hardkeys are front-panel buttons whose functions
are always the same. They have a label printed
                                                       11-Use the numeric-entry keys to enter a numeric
                                                       value.
directly on the key itself. Throughout this book,
hardkeys are printed like this: [Inst Mode].           12-The microphone power connector provides
                                                       power (8 Vdc) for the Microphone Adapter Kit
2-The analyzer's screen is divided into the menu       (Option UK4).
area and the display area. The menu area displays
video labels for the softkeys. The data area           13-The connector area of the front panel has two
displays measurement data and information about        different configurations. The standard analyzer
the parameter settings.                                has a source output connector and two input
                                                       connectors. The 4-channel analyzer (Option AY6)
3-The [Rtn] key returns the menu to the previous       has four input connectors.
level.
                                                       Range indicators are located next to each input
4 -The POWER switch turns on the analyzer.             connector. The upper LED is the over-range
                                                       indicator (the signal level exceeds the current
5 -Use the SYSTEM keys to control various              range setting). The lower LED is the half range
system-level functions. These functions include
                                                       indicator (the signal level exceeds half the current
saving files, plotting measurement data, and
                                                       range setting).
accessing online help.
                                                       14-A source on/off indicator is located at the left
6 -Use the disk drive to save your work on 3.5         edge of the connector area.
inch flexible disks.
                                                       The standard Agilent 35670A (2-channel) has a
7-The knob moves the markers and the cursor.      It   source connector on the front panel.
also steps through numeric values and scrolls
through online help.

8 -Use the DISPLAY keys to control what
appears on the analyzer's traces. They only affect
how data is displayed; DISPLAY keys do not
change measurement parameters. You can press
keys in the DISPLAY menus without losing
measurement parameters.
9 -Use the MARKER keys to select a variety of
marker features.
The Agilent 35670A at a Glance (Rear Panel)
Agilent 35670A Rear Panel

1-The GPIB connector links the Agilent 35670A
to other GPIB devices. GPIB parameters are set in
the [Local/GPIB] and [Plot/Print] menus.

2-The SERIAL PORT and the PARALLEL
PORT link the analyzer to plotters and printers.
These parameters are set in the [Plot/Print] menu.

3-The SOURCE connector outputs the analyzer's
source signal. An LED on the front panel
indicates if the source is on or off. The source
parameters are set in the [Source] menu.
The standard Agilent 35670A (2-channel) also has
a source connector on the front panel.

4-The EXT TRIG connector links the analyzer to
an external trigger signal. The external trigger
parameters are set in the [Trigger] menu.

5-The TACH connector links the analyzer to a
tachometer. The tachometer parameters are set in
the [Input] menu.

6-The KEYBOARD connector attaches an
optional keyboard to the analyzer.

7-The DC POWER connector accepts DC power
levels from 12 - 28 Vdc (nominal).

8-The AC POWER connector accept a wide range
of ac voltage levels.

9-The POWER SELECT switch determines
whether the analyzer is powered via the AC
POWER connector or the DC POWER connector.

10-The EXT MONITOR port links the analyzer
to multi-sync monitors.
Safety Summary
The following general safety precautions must be observed during all phases of
operation of this instrument. Failure to comply with these precautions or with
specific warnings elsewhere in this manual violates safety standards of design,
manufacture, and intended use of the instrument. Agilent Technologies, Inc.
assumes no liability for the customer's failure to comply with these requirements.

GENERAL
This product is a Safety Class 1 instrument (provided with a protective earth
terminal). The protective features of this product may be impaired if it is used in
a manner not specified in the operation instructions.

All Light Emitting Diodes (LEDs) used in this product are Class 1 LEDs as per
IEC 60825-1.

ENVIRONMENTAL CONDITIONS
This instrument is intended for indoor use in an installation category II,
pollution degree 2 environment. It is designed to operate at a maximum relative
humidity of 95% and at altitudes of up to 4600 meters. Refer to the
specifications tables for the ac mains voltage requirements and ambient
operating temperature range.

BEFORE APPLYING POWER
Verify that the product is set to match the available line voltage, the correct fuse
is installed, and all safety precautions are taken. Note the instrument's external
markings described under Safety Symbols.

GROUND THE INSTRUMENT
To minimize shock hazard, the instrument chassis and cover must be connected
to an electrical protective earth ground. The instrument must be connected to
the ac power mains through a grounded power cable, with the ground wire
firmly connected to an electrical ground (safety ground) at the power outlet.
Any interruption of the protective (grounding) conductor or disconnection of
the protective earth terminal will cause a potential shock hazard that could
result in personal injury.
          FUSES
          Only fuses with the required rated current, voltage, and specified type (normal
          blow, time delay, etc.) should be used. Do not use repaired fuses or
          short-circuited fuse holders. To do so could cause a shock or fire hazard.

          DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
          Do not operate the instrument in the presence of flammable gases or fumes.

          DO NOT REMOVE THE INSTRUMENT COVER
          Operating personnel must not remove instrument covers. Component
          replacement and internal adjustments must be made only by qualified service
          personnel.

          Instruments that appear damaged or defective should be made inoperative and
          secured against unintended operation until they can be repaired by qualified
          service personnel.
WARNING   The WARNING sign denotes a hazard. It calls attention to a procedure,
          practice, or the like, which, if not correctly performed or adhered to,
          could result in personal injury. Do not proceed beyond a WARNING
          sign until the indicated conditions are fully understood and met.


Caution   The CAUTION sign denotes a hazard. It calls attention to an operating
          procedure, or the like, which, if not correctly performed or adhered to, could
          result in damage to or destruction of part or all of the product. Do not proceed
          beyond a CAUTION sign until the indicated conditions are fully understood and
          met.
Safety Symbols


        Warning, risk of electric shock


         Caution, refer to accompanying documents
        Alternating current
        Both direct and alternating current


         Earth (ground) terminal


         Protective earth (ground) terminal


         Frame or chassis terminal


        Terminal is at earth potential.

       Standby (supply). Units with this symbol are not completely disconnected from ac mains when
 this switch is off
Regulatory Markings


          The C-tick mark is a registered trademark of the Spectrum
          Management Agency of Australia. This signifies compliance with
          the Australian EMC Framework regulations under the terms of the
          Radio Communications Act of 1992.
          The CE mark is a registered trademark of the European
          Community.

          ICES/NMB-001 indicates that this ISM device complies with the
          Canadian ICES-001.

          Cet appareil ISM est confomre a la norme NMB-001 du Canada.
          Contains one or more of the six hazardous substances above the
          maximum concentration value (MCV), 40 Year EPUP.


          The CSA mark is a registered trademark of the CSA-International.




          This instrument complies with the WEEE Directive (2002/96/EC)
          marketing requirement. The affixed product label indicates that you
          must not discard this electrical/electronic product in domestic
          household waste.
     Table of Contents




Part I Making Measurements
     Setting Up a Measurement Part I-1

    1 Measuring Rotating Machinery
      To connect transducers 1-2
      To specify a transducer's unit and sensitivity 1-3
      To calibrate a transducer 1-4
      To measure vibration power 1-6
      To characterize a tachometer signal 1-8
      To measure an order spectrum 1-10
      To display an rpm-stepped order map 1-12
      To display a time-stepped order map 1-13
      To measure an order track 1-14
      To display an rpm-stepped order track 1-16
      To display a time-stepped order track 1-17
      To display phase relative to the tachometer signal 1-18
      To display an rpm profile 1-19
      To display an orbit diagram 1-20

    2 Measuring Structures
      Measuring Structures 2-2
      Impact Testing 2-8
      To measure a driving point measurement 2-10
      To view unwrapped phase of a driving point measurement 2-12
      To view the real and imaginary components of a driving point
        measurement 2-13
      To preview the time record 2-14
3 Measuring Sound
  To connect the microphone adapter (Option UK4) 3-2
  To connect microphones 3-3
  To calibrate a microphone 3-4
  To measure sound pressure level 3-6
  To measure overall sound pressure level 3-8
  To measure overall impulse characteristics 3-9

4 Measuring Spectra and Networks
  To measure a wideband spectrum 4-2
  To measure a narrowband spectrum 4-4
  To measure frequency and amplitude 4-5
  To measure noise power (PSD) 4-6
  To measure harmonic distortion 4-7
  To measure sideband power 4-8
  To display a spectral map 4-9
  To measure frequency response--FFT 4-10
  To measure frequency response--swept sine 4-12
  To measure phase distortion 4-14

5 Measuring Control Systems
  Measuring Control Systems 5-2
  Measuring Control System Performance 5-6
  To measure a step response 5-8
  To measure performance parameters 5-10
  Measuring Control System Stability 5-12
  To measure an open loop response 5-14
  To measure gain and phase margin 5-16
  To display a Nyquist diagram. 5-17
  To measure a closed loop response 5-18
  To calculate the open loop response 5-20

6 The Arbitrary Source Option 1D4
  The Arbitrary Source 6-2
  To create a step signal 6-4
  To create a ramp signal 6-6
  To create a profiled chirp waveform 6-8
     7 Using Time Capture
        To prepare for filling the capture buffer 7-2
        To allocate memory for the capture buffer 7-4
        To fill the capture buffer 7-5
        To save the capture buffer on a flexible disk 7-6
        To recall a capture buffer from a flexible disk 7-7
        To examine the capture buffer 7-8
        To define an analysis region 7-9
        To prepare for measuring from the capture buffer 7-10
        To measure from the capture buffer 7-12

Part II Working with the Display

     8 Displaying Measurement Data
        To select the active trace 8-2
        To display measurement data--one channel, one trace 8-3
        To display measurement data--one channel, multiple traces 8-4
        To display measurement data--multiple channels, multiple traces 8-5
        To display a data register 8-6
        To display a math function 8-7

     9 Formatting the Display
        To arrange traces on the screen 9-2
        To enable global screen elements 9-3
        To enable trace-specific screen elements 9-4
        To enter your own trace title 9-5
        To control the screen 9-6
        To set up a waterfall display 9-7
        To enhance a waterfall display 9-8
        To display the waterfall buffer 9-9
        To display one trace from the waterfall buffer 9-10
        To display a slice through the waterfall buffer 9-11
     10 Scaling the Display
         To enable Y-axis autoscaling 10-2
         To scale the Y-axis with Reference and Y Per Div softkeys 10-3
         To set top and bottom values for the Y-axis 10-4
         To scale the Y-axis with axes scale markers 10-5
         To match Y-axis scaling of another trace 10-6
         To scale the X-axis with axes scale markers 10-7
         To match X-axis scaling of another trace 10-8

     11 Selecting Display Units
         To select a coordinate system 11-2
         To select the frequency/time unit 11-3
         To select the phase unit 11-4
         To select the amplitude unit 11-5
         To specify a transducer's unit and sensitivity 11-6
         To convert a displayed transducer unit 11-7
         To display amplitude in dBm 11-8

Part III Using the Basics

     12 Using Online Help
         To display help for a key 12-2
         To display a related help topic 12-3
         To select a topic from the help index 12-4
         To print a help topic 12-5
         To exit the help system 12-6
13 Managing Files and Disks
    To set up an external disk 13-2
    To select the default disk 13-3
    To format a flexible disk 13-4
    To change the current DOS directory 13-5
    To create a DOS directory 13-6
    To save a trace 13-7
    To save a program 13-8
    To save other data 13-9
    To recall a trace 13-10
    To recall a program 13-11
    To recall other data 13-12
    To delete a file 13-13
    To delete a DOS directory 13-14
    To copy a file 13-15
    To rename a file 13-16

14 Plotting and Printing
    To set up your hardcopy device--parallel 14-2
    To set up your hardcopy device--serial 14-3
    To set up your hardcopy device--HP-IB 14-4
    To plot screen contents 14-5
    To print screen contents 14-6
    To annotate a plot or print 14-7
    To reassign plotter pens 14-8
    To modify the plotting speed 14-9
    To position a plot on the page 14-10
Part IV Using Advanced Tools

    15 Synthesis Option 1D3
        Synthesis 15-2
        The Synthesis Table and Data Formats 15-4
        To display a synthesis table -- Pole-Zero Format 15-15
        To select/convert a table format -- Pole-Residue format 15-16
        To select/convert a table format -- Polynomial format 15-17
        Creating a Synthesis Table 15-18
        To create a synthesis table 15-22
        To clear a synthesis table 15-24
        Performing the Synthesis 15-25
        To synthesize a frequency response curve 15-26
        To change the data spacing for the X-axis 15-28
        Working With Synthesis Tables 15-29
        To edit an existing synthesis table 15-30
        To save a synthesis table 15-31
        To save a synthesis trace 15-32
        To recall a synthesis table 15-33
        To transfer a curve fit table to a synthesis table 15-34
        To change the synthesis register 15-35

    16 Curve Fit
       Option 1D3
        Curve Fit 16-2
        Overview of Curve Fit Procedures 16-27
        To set up a curve fit 16-30
        To specify a weighting function 16-32
        To perform a curve fit 16-33
        To set up a curve fit -- manual operation 16-34
        Working with Curve Fit Tables 16-36
        To edit a curve fit table 16-37
        To transfer a curve fit table to a synthesis table 16-38
        To compare a frequency response measurement to synthesized results 16-39
        To save a curve fit table 16-40
        To save a curve fit's frequency response function 16-41
        To recall a curve fit table 16-42
        To change the curve fit register 16-43
17 Limit Testing
    To draw a limit 17-2
    To delete a limit segment 17-3
    To convert a trace to a limit 17-4
    To enable limit testing 17-5
    To save a limit 17-6

18 Math Operations and Data Editing
    Math Operations and Data Editing 18-2
    To define a constant 18-4
    To specify an operand within an operation 18-5
    To define a function 18-7
    To view the results of a math operation 18-8
    To compute cepstrum 18-9
    To compute a Hilbert transform 18-10
    To calculate the envelope of a function 18-11
    To compute the signal-to-noise ratio 18-12
    To compute group delay 18-13
    To modify a waveform 18-14
Setting Up a
Measurement
The following seven chapters present a variety of measurements you can make
with the Agilent 35670A and its options. Each chapter focuses on a different
type of measurement.



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