Keithley 3940 Service Manual page 12

Multifunction synthesizer
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SECTION 1
Performance Verification
Model 3940
Fipure 2-l.
NOTE : Set Timer/Counter
for 5Oa Input
Connections to Timer/Counter
Table 1-2. Limits for Frequency and Duty Cycle Accuracy
Allowable
Reading
Synthesizer
Function
Amplitude
Frequency
(18T to 28W
Main
Sine
2ovp-p
1OMHZ
9.99995M.a to
10.00005MH2
M&l
Square (FKD50)
2ovp-p
1kHZ
498.5psec
to
501.5pec
lOk?sz
49.85psec
to
50.15pec
1OOkHz
4.985psec
to
5.015pec
500kHz
0.98psec
to
1.02pec
1MHz
490nsec
to
5lOnsec
Main
Square (VAR 5)
2ovp-p
1kHz
49.5pec
to
50.5j.isec
(VAR50)
495psec
to
505pec
(VAR95)
940.5psec
to
959.5pec
Main
Square (VAR50)
2OVp-p
1okHz
49.5pec
to
50.5ysec
1ookJrIz
4.95psec
to
5.05ysec
5ookJrIz
0.99pec
to
l.Olp.sec
lh4Hz
495nsec
to
505nsec
l-3

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