Test Setup
Oscilloscope
(HP
541211)
H P
3324A
HP
81 12A
20
d B
BNC-Tee
Cd
D
Attenuator
0
Figure
8-16.
Delay Control Verification Test
Procedure
1 . Connect the equipment as shown in the setup figure.
2. Set up the HP 81 12A as follows:
Trigger Mode
Control Mode
Transition
PER
DEL
WID
HIL
101
NORM
DELC
Fixed
200 ns
100 ns
50 ns
2.00 v
0.00 v
3. Vary the power supply or HP 3324A between approx 1 volt and 10
volts and verify that oscilloscope display indicates delay time of
between 75 ns and 1 70 ns as shown below.
TRIG
10 V
O V
HIL
LOI.
Figure
8·17.
Correct Delay Control
4. Connect the HP 8 112A output to the counter.
5. Change HP 81 12A as follows:
PER
WID
999 ns
300 ms
6 . Set the counter as follows:
TIME
Slopes
Transition
Trigger levels
Gate Mode
A -+ B
A and B
Positive
1.0 v
-+ No delay
10 V
O V
HIL
LOI.
Testing Performance
8-25
Summary of Contents for 8112A
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