Correct Delay Control; Test Setup - HP 8112A Operating, Programming And Servicing Manual

Test Setup

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

Correct Delay Control

999 ns
300 ms
Testing Performance
20 d B
Attenuator
10 V
O V
HIL
LOI.
8-25