Duty Cycle Performance Test - HP 8112A Operating, Programming And Servicing Manual

•
Counter (HP 5335A )
Equipment
•
Cable Assembly BNC
•
50 n Feedthrough Termination
(
Required if counter input impedance
Test Setup
H P 8112A
1. Connect the equipment as shown in the setup figure. Use a
Procedure
50 n feedthrough termination if you cannot select 50 n input
impedance on the counter.
2. Set up the HP 81 12A as follows:
Input Mode
Control Mode
Transition
PER
DEL
101
HIL
3. Set the counter to DTY CY A.
Set the HP 81 12A DTY to the following values and read the
4 .
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 (VERNIER ) key adjust the duty cycle in steps until the
counter displays 993.
0
0
8·
Figure

7. Duty Cycle Performance Test

NORM
Off
Fixed
lOOµs
65 ns
1.00
- 1 .00
HP 8112A
setting
DTY
1 .0%
10%
50%
90%
* 993
i=
50 n).
Counter (H P 5 33 5A)
v
v
Cowiter reading
Low Limit High Limit
0.9% 1 . 1%
9%
1 1%
45 %
55%
81% 99%
-
89. 1%
Testing Performance
8· 1 1