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6-9.
s Path Test
This test checks the continuity of the signal path shown in Figure 6-1. A signal is input at the
0-40MHz Input of the -hp- 35601 A; it is then measured with an -hp- 3455A voltmeter at the
500 OUTPUT TO 3S8SA. The program displays equipment set-up instructions, performs
the test, displays the desired results, asks if a retest is desired, and prints the results.
httiaBzJng the Bypass Path Test
With the High Frequency Menu displayed, press special function key (SFK) Kl to initialize
the test. After initialization, follow the instructions displayed on the computer.
m a t if the Test Fails?
After determining that the test equipment was connected properly, determine which relay is
bad. This can be accomplished using a scope to see at which relay the input signal is not pre
sent. (Also, "SWITCH" subprogram could be used to open and close the relays while
checking the continuity of each relay.) Refer to Service Group Two for schematics and com
ponent locators. In all likelihood, only one of the relays is bad. If, however, the entire in
strument is not responding to HP-IB command, proceed to Service Group Four for HP-IB
handshake troubleshooting.
Equipment Set Up
I TERMINATION
|33»
S i d NAL
n °
U •.
35601
O O
O °
(MO MHZ
500
INPUT
°.NL°
Figure 6-1. Bypass Path Test
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