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Systron-Donner_100A_Pulse_Generator


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OPERATION & MAINTENANCE

                   HANDBOOK




  Tel: (415) 676-5000                    .         .
                     CONCORD INSTRUMENT D I V I S I O N
                                                  94518
            1 0 Syrtron Drtve r Concord, Caltforn~a       U.S.A.
                          T W X : 910-481-9479 Cable: SYSTRONOONNER




                                  MODEL 700A
                            PULSE GENERATOR
                           Part Number 37000 - 690
                                     WARRANTY
Systron-Donner instruments are warranted during a period of one year from date of shipment to
original purchaser to be free from defects in material and workmanship. This warranty does not apply
to vacuum tubes, except as these are warranted by tube manufacturers. The liability of Seller under
this warranty is limited to replacing or repairing any instrument or component thereof which is returned
by Buyer, at his expense, during such period and which has not been subjected to misuse, neglect.
improper installation, repair, alteration, or accident. Seller shall have the right to final determination as
to the existence and cause of a defect. I n no event shall Seller be liable for collateral or consequential
damages. This warranty is in lieu of any other warranty, expressed, implied, or statutory; and no
agreement extending or modifying it will be binding upon Seller unless in writing and signed by a duly
authorized officer.




                           RECEIVING INSPECTION
Every Systron-Donner instrument is carefully inspected and is in perfect working order at the time of
shipment. Each instrument should be checked as soon as received. I f the unit is damaged in any way, or
fails to operate, a claim should immediately be filed with the transportation company.




Whenever a Systron-Donner instrument requires service, the nearest Systron-Donner representative
should be contacted; all representatives will provide immediate service or arrange factory returns when
necessary.

Please specify both model and serial number in all correspondence concerning Systron-Donner instru-
ments. Address all inquiries on operation or applications to your nearest sales representative; or, Sales
Manager, Concord Instrument Division, Systron-Donner Corporation, 10 Systron Drive, Concord.
California 94518.
-
                                                                               MODEL S OOA




-                               Model lOOA Pulse Generator




               T h r Datapulsr, M o d r l 1 0 0 A i a a n e c o n o m i c a l h i g h p e r -
    forrnanc~         pulse g e n ~ r a k o r r l r s i g n e df o r general purpose t e s t -
-   i n g of a v a r i e t y of e l ~ c t r o n i c       equipmrnt.       Unfqur., all solicl
    s t a t e c i r c u i t s reduce conlplpxity and p r o v i d e v e r s a t i l e p e r -
    It)rmanc~,in a c u n v e n i c ~ n h l vcompact package. Simultaneous
    positive anrl n r g a t i v e outputs d p l i r r r L n a t t s i n t o 513 o h m s ,
+
    a n d pulsr r a t e , w i d t h , amplitude, anti rlplay a r e continuously
    variable o v e r broarl r a n g e s .                   F r o n t panel controls select
    c i t h e r s i n g l y o r d o u \ ~ I t . p u l s operation, s y n c h r o n o u s o r a s y n -
                                                        r
    chronous e a t i n g , and e i t h e r i n t e r n a l , external, or manual
-   s i n g l e cycIt= t r l g g e r i n c . T w o s y n c h r o n i z i n g t r i g g e r outputs
    a r e supplied f o r s v s t e m a p p l i c a t i o n a n d t o provide a reference
    for pulse drblay in the s i n ~ l c                  pulse rnorle.

-
                                                                                                iii
                                                 MODEL 1W A


                     TABLE OF CONTENTS
                                                        PAGE

TITLE PAGE                                             i
FRONTISPIECE                                           iii
TABLE OF CONTENTS                                      v
LlST OF SCHEMATICS                                     vi
LlST OF l LLUSTRATIONS                                 vi
LlST OF TABLES                                         vii

SECTION I      SPEC1FICATIONS

                      Repetition Rate
                      External Trigger
                      Manual Cycling
                      Gated Operation
                      Trigger Outputs
                      Pulse Mode
                      Pulse Delay
                      Pulse Width
                      Main Pulse Output
                      Rise and Fall Time
                      Jitter
                      Waveform Aberration
                      Output Protection
                      Output Mixing
                      Operating Temperature
                      Power Required
                      Physical Characteristics
                      Accessories Available

SECTION I1     OPERATION

               2.1    General Information
               2.2    Controls and Connectors
               2.3    Functional Verification
               2.4    Operating Instructions
               2.5    Definitions

SECTION Ill    THEORY OF OPERATION

               3.1    General Description
               3.2    Circuit Description
MODEL 100A

                                                              PAGE
SECTION I V      MAINTENANCE

                 4.1   Preventive Maintenance
                 4.2   Parts Removal
                 4.3   Troubleshooting
                 4.4   Calibration

SECTION V        PARTS LlST

                 5.1   Abbreviations and Symbols
                 5.2   Repetition Rate Switch Assembly
                 5.3   Pulse Delay Switch Assembly
                 5.4   Pulse Width Switch Assembly
                 5.5   Front Panel Assembly
                 5.6   Back Panel Assembly
                 5.7   Main Circuit Board Assembly

                       LlST OF SCHEMATICS

Drawing Number                    Description

                       Block Diagram - Model 100A Pulse Generator
                       Schematic - Model 100A Pulse Generator
                       Schematic - Power Supply

                         LlST OF lLLUSTRATIONS

Figure Number                     Title

                       Model 1OOA Accessories
                       Model 100A Controls and Connectors
                        Front Panel
                       Model l00A Controls and Connectors
                        Back Panel
                       Networks for Transistor Load
                       Output Decoupling Circuits
                       Reverse Voltage Protection
                       Output Mixing
                       Output Pulse Characteristics
                       Waveform Diagrams
                       Repetition Rate Oscillator
                       Trigger Multivibrator
                       External Trigger Amplifier
                                               MODEL lOOA
                                                          PAGE
Figure Number               Title

                Delay Multivibrator                      3-11
                Output Drivers and Amplifiers            3-14
                Parts Location - Schematic 37000 - 152   4 -5
                Top View - Model 100A                    4 -8
                Bottom View - Model lOOA                 4 -9

                  LIST OF TABLES

Table Number                Title

4-1             Troubleshooting                          4 -6




                                                         vii
                                                                       M O D E L l00A


                                       SECTION I
                                  SPECIFICATIONS

1.1             Repetition Rate
                R e p e t i t i o n r a t e i s continuously v a r i a b l e f r o m
0. 1 h e r t z t o 10 m e g a h e r t z i n eight d e c a d e r a n g e s f o r e i t h e r
single o r double p u l s e o p e r a t i o n . E f f e c t i v e r a t e s t o 20 m e g a -
h e r t z m a y b e s e t up i n t h e double p u l s e mode.


1.2             External Trigger
                  T h e e x t e r n a l t r i g g e r input i s a c coupled, and
o p e r a t e s a t 0 t o 10 m e g a h e r t z f r o m f 0 . 2 5 volt p u l s e s with a
m i n i m u m d u r a t i o n of 20 n a n o s e c o n d s , o r 50 h e r t z to
10 m e g a h e r t z f r o m 1 volt r m s s i n e m a v e s . Slope p o l a r i t y
and l e v e l c o n t r o l s p r o v i d e t r i g g e r i n g a t any point on the
input w a v e f o r m m o r e than 0 . 2 5 v o l t s and l e s s than 5 v o l t s
above o r below t h e a v e r a g e d c l e v e l . Input i m p e d a n c e i s
g r e a t e r than 2. 5k o h m s . T h e m a x i m u m t r a n s i e n t a m p l i t u d e
which m a y be applied safely i s +5 v o l t s .


1.3             Manual Cycling
              In t h e single p u l s e m o d e , a c t u a t i n g the single
p u l s e pushbutton p r o v i d e s one c y c l e of output ( s i n g l e o r
double p u l s e m o d e ) .


1.4             Gated Operation
                  The gating m o d e i s s e l e c t e d a s nongated ( c o n t i n u -
o u s ) , s y n c h r o n o u s l y g a t e d , o r a s y n c h r o n o u s l y gated. Signal
l e v e l s m o r e p o s i t i v e than t 2 v o l t s a r e r e q u i r e d t o e n a b l e
the outputs in e i t h e r gated m o d e . The m a x i m u m l e v e l which
may h c applied s a f e l y i s 10 v o l t s .
M O D E L 1O A
            O                                                 SPECIFICATIONS

1.4. 1            Synchronous Gating

                  The repetition r a t e o s c i l l a t o r i: n o r m a l l y off in
t h i s m o d e and i s turned on f o r t h e d u r a t i o n of a n applied gate
pulse. Both m a i n outputs and both t r i g g e r output. a r e gated
and synchronized to the gate signal.

1.4.2             Asynchronous Gating

                   T h e pulse delay c i r c u i t i s gated i n thi: m o d e ,
and the r a t e o s c i l l a t o r o p e r a t e s continuously. Main pul: e
outputs and the r e f e r e n c e t r i g g e r begin with the f i r s t c y c l e
(internally o r externally triggered) after the gate p u l ~ e
o c c u r s and stop when the g a t e pulse s u b s i d e s . The advanced
t r i g g e r i s not gated and o c c u r s a t t h e o s c i l l a t o r repetition
rate.


1.5               Trigger Outputs
1.5. 1           Advanced T r i g g e r

                       The advanced t r i g g e r i s a positive pulse with a
m i n i m u m amplitude of 1. 7 v o l t s f r o m a 50 ohm s o u r c e , and
i s typically 15 nanoseconds i n duration. Available on i n -
t e r n a l l y t r i g g e r e d o p e r a t i o n s only, the advance t r i g g e r
o c c u r s a p p r o x i m a t e l y 10% of the repetition r a t e period b e -
f o r e the r e f e r e n c e t r i g g e r .

1.5.2            Reference Trigger

                     The r e f e r e n c e t r i g g e r i s a positive pulse with a
m i n i m u m amplitude of 2 . 0 volts f r o m a 50 ohm s o u r c e , and
i s typically 15 nanoseconds i n duration. When t r i g g e r e d
f r o m a n e x t e r n a l s o u r c e , the r e f e r e n c e t r i g g e r o c c u r s
a p p r o x i m a t e l y 30 nanoseconds a f t e r the e x t e r n a l t r i g g e r .


1.6              Pulse Mode
           Single o r double p u l ~ e p e r a t i o n i s zelected h y
                                     o
the pulse mode switch.
SPECIFICATIONS                                                             MODEL lOOA

 1.6. 1            Single P u l s e

              One pulse p e r c y c l e o c c u r s i n the m a i n outputs
a t the end of the d e l a y period.

1. 6.2             Double P u l s e

                      Two i d e n t i c a l p u l s e s p e r c y c l e o c c u r i n t h e m a i n
outputs, the f i r s t a p p r o x i m a t e l y 40 nanoseconds a f t e r t h e
r e f e r e n c e t r i g g e r , and the second a t a t i m e d e t e r m i n e d by
the pulse delay c o n t r o l s .


                   Pulse Delay
                     P u l s e d e l a y i s continuously v a r i a b l e f r o m
40 nanoseconds with r e s p e c t t o t h e r e f e r e n c e t r i g g e r , o r
60 nanoseconds with r e s p e c t to a n e x t e r n a l t r i g g e r , up t o a
m a x i m u m of 10 seconds i n seven d e c a d e r a n g e s with a
1 0 0 : l m u l t i p l i e r . Delay i s v a r i a b l e o v e r a t l e a s t 70% of the
pulse period up to a r e p e t i t i o n r a t e of 1 m e g a h e r t z , d e -
c r e a s i n g to 50% above 4 m e g a h e r t z and 30% a t 10 m e g a h e r t z .
The r e f e r e n c e t r i g g e r i s counted down when the delay i s
g r e a t e r t h a n the pulse p e r i o d , with s t a b l e countdown r a t i o s
g r e a t e r than 100: 1 p o s s i b l e ; the advance t r i g g e r i s not
counted down.


1.8                Pulse Width
               P u l s e width i s continuously v a r i a b l e ( m e a s u r e d a t
the 50% point of the leading and t r a i l i n g e d g e s ) f r o m typically
35 nanoseconds (40 nanoseconds m a x i m u m ) to 10 s e c o n d s i n
s e v e n decade r a n g e s with a 1 0 0 : l m u l t i p l i e r . The m a x i m u m
duty cycle i s a t l e a s t 60% and i s typically 7070.

                   Main Pulse Output
                 P u l s e amplitude i s continuously v a r i a b l e f r o m
0. 5 to 10 v o l t s into 50 o h m s with simultaneous positive and
negative dc coupled outputs ( b a s e l i n e s a r e at ground). The
s o u r c e impedance d e c r e a s e s with a m p l i t u d e and i s a p p r o x i -
m a t e l y 50 o h m s a t a m p l i t u d e s l e s s than 5 v o l t s .
MODEL IOOA                                                SPECIFICATIONS

1.10           Rise and Fall Time
                 R i s e t i m e i s l e s s than 5 nanoseconds, and fall
t i m e i s typically l e s s than 7 nanoseconds (10 nanoseconds
~ n a x i m u r n with the outputs t e r m i n a t e d i n 50 ohm r e s i s t i v e
                  )
loads.


1.11          Jitter
               Repetition r a t e , d e l a y , and width j i t t e r a r e l e s s
than 0. 1 5 % (typically 0. 1%) on e a c h range (within the highest
decade on the width and delay r a n g e s with m o r e than
10: 1 c o v e r a g e ) .


1.12          Waveform Aberration
                   Overshoot, p r e s h o o t , ringing, and top slope
a b e r r a t i o n a r e typically l e s s than f 5 % (with a m a x i m u m of
k70/0) a t a m p l i t u d e s g r e a t e r than 3 volts (with p r o p e r l y
connected 50 ohm t e r m i n a t i o n s ) .


1.13          Output Protection
                  Output s t a g e s will not be damaged by a n y c o m b i -
nation of front panel c o n t r o l s e t t i n g s and will withstand
s h o r t c i r c u i t s to ground of a n y duration. The i n s t r u m e n t
i s not rated f o r o p e r a t i o n into l o a d s a t o t h e r than ground
potential.


1.14          Output Mixing
           S a m e p o l a r i t y outputs m a y be diode mixed with a
negligible l o s s of amplitude. S a m e o r opposite polarity
outputs m a y be r e s i s t o r mixed with a r e s u l t a n t l o s s of
amplitude. Outputs m a y not be d i r e c t l y coupled together.
SPECIFICATIONS                                                                MODEL lOOA

1.15             Operating Temperature
                  The i n s t r u m e n t i s designed f o r operation i n
                                          0
a m b i e n t t e m p e r a t u r e s of 0 t o 50



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