Equipment; Test Setup; Procedure - HP 8112A Operating, Programming And Servicing Manual

Counter (HP 5335A)

Equipment

n
50 R Feedthrough Termination
n
(Required if counter input impedance # 50 0).

Test Setup

HP 8112A
1. Connect the equipment as shown in the setup figure. Use a

Procedure

50 R feedthrough termination if you cannot select 50 R input
impedance on the counter.
2. Set up the HP 8112A as follows:
Input Mode
Control Mode
Transition
P E R
DEL
HIL
3. Set the counter to DTY CY A.
4. Set the HP 8112A DTY to the following values and read the
actual output from the counter. Record your results on a copy of
the Test Record, specified limits are given here and on the Test
Record.
Note
* Using the @?6iK) key adjust the duty cycle in steps until the
counter displays 99%.
Figure 8-7. Duty Cycle Performance Test
NORM
Off
Fixed
65
ns
1.00 v
- 1 . 0 0 v
HP Counter reading
8112A
setting
DTY Low Limit High Limit
1.0% 0.9%
10% 9%
50% 45%
90% 81%
89.1%
Counter (HP 5335A)
1.1%
11%
55%
99%
Testing Performance 8-11