HP 8753E - Page 349

Check the A and B Inputs
Good inputs produce traces similar to Figure 8-2 in terms of flatness. To examine
both input traces, do the following:
1. Connect the equipment as shown in Figure 8-1. (The through cable is HP part
number 8120-4779.)
NETWORK ANALYZER
Figure S-l. Equipment Setup
2.
3.
Check the flatness of the input A trace by comparing it with the trace in
Figure 8-2.
Check the flatness of the input B trace by comparing it with the trace in
Figure 8-2.
:.:............................... __ .... ................... ..~.~...~.~ ...... . _
................................ ... ) p .:.:.:.:.: .... / ....
fie3 1Meao)
..................
::..:...:.:.:.:
..............................................
............ _. .......... ..-. _. ...................... _. ... iiii. ..................... 2..
~~~~~~~~., ;@)
:.z.x.:.: .- ,. :.:.:.z.:.&
...
... ........... ii .............................. .._ ........ :.:.::.,_L :cz.:.m
q If neither of the input traces resembles Figure 8-2, continue with
“Troubleshooting When All Inputs Look Bad”.
q If at least one input trace resembles Figure 8-2, continue with
“Troubleshooting When One or More Inputs Look Good”.
84 Receiver Troubleshooting