Tektronix VX4357, User Manual

Page: 61 / 64

Appendix E: Performance Verification Procedure
VX4357
A–17
Relay Resistance Test: Channel 00
1. Place the DD-50P connector onto P4.
2. Place the DMM + side to the pigtail labeled N.C., and place the DMM – side to DD-50P
pin-2 (wiper Channel 00).
3. The DMM will read less then 400 milliohms.
4. Send “C0
lf
” (Close relay CH00) to the VX4357.
5. The DMM will read greater then 10 Gigohms.
6. Send “Q0
lf
” (Query relay CH00) to the VX4357.
7. Read “1
crlf
” (Relay CH00 is closed).
8. Place the DMM + side to the pigtail labeled N.O .
9. The DMM will read less then 400 milliohms.
10. Send “O0
lf
” (Open relay CH00) to the VX4357.
11. The DMM will read greater then 10 Gigohms.
Repeat steps 1 through 11 for relays CH01 through CH15, substituting Cx
lf
and Ox
lf
for the ap-
preciate relay, where x = relay to close or open. Use Table 1–2 for the channel to wiper pin-out.
Table 1–2: Channel to wiper pin-out
Channel Wiper pin
01 4
02 6
03 8
04 10
05 12
06 14
07 16
08 19
09 21
10 23
11 25
12 27
13 29
14 31
15 33
12. After repeating the above steps for Ch00 through CH15, remove the DD–50P connector from
P4 and place it on P5.
13. Add 16 to all relay references and repeat the above steps for relays CH16 through CH 31.