Phase A To B Operation Check; Totalize B Operation Check - Keithley 776 Instruction Manual

5-10-7. Phase A to B Operation Check
Equipment: Pulse/Function generator
Procedure:
1. Connect the test equipment as described in Figure 5-9. It is
essential that both cables to channels A and B are exactly
equal in length.
2. Press Model 176 push-buttons in the following sequence:
[2nd], [DCL], [Phase A-B], [ XA] and then [SOQ A&B].
3. Set Pulse/function generator parameters as follows:
Output Wave form-Normal Pulse
Pulse Frequency - 18.2 kHz
Pulse Width - 27.5 ps
Pulse Amplitude -S? Vp-p
4. Verify a stable counter readings as follows:
180.00 zk2.00
5-10-8. Totalize B Operation Check
Equipment: Pulse/Function generator
Procedure:
1. Connect the test equipment as described in Figure 5-10.
2. Press Model
776
push-buttons in the following sequence:
[Znd], [DCL], [TOT B], [SOQ] and then [CLR].
3. Set Pulse/function generator parameten as follows:
Output Wave form _ Pulse
Pulse Frequency - 40 MHz
Pulse Width - IO ns
Pulse Amplitude - +2 Vp-p
Trigger Mode - External Burst
Burst - 1999
Trigger Slope - Positive
4. Press the pulse/function generator MANUAL triefer puah-
button. Verify a counter readings as follows:
1999
5. Again press the pulse generator MANUAL trigger push-
button. Verify a counter readings as follows:
3998
5-10-g. Auto Trigger Level A and B Operation
Check
Equipment: Pulse/Function generator
Procedure:
1. Connect the test equipment as described in Figure 5-l I.
2. Press Model
776
push-buttons in the following sequence:
[2nd], [DCL], [SOQ A], [2nd], [AUTO TRIG] and then [TL
Al.
3. Set Pulse/function generator parameters as follows:
Output Wave form -Normal Sinewave
Frequency - 50 kHz
Duty Cycle - 50%
Amplitude - 1 Vp-p
Offset - 4v
4. Verify that trigger level A reading is as follows:
PPG.
"VT
MODEL 776
COUNTER I TIMER
\
OUT
J
Figure S-10.
Totolize B Test Ser-up.
s-9