HP 8114A - Signal Boards Selftest; Timing Board Selftest

HP 8114A Service Guide
I loss of frequency reference to test submodule
Normally a reset would be caused by an external
signal or by the CPU executing a reset instruction
Internal Serial Device Bus failed
Internal Serial Device bus traffic over the feedback
bus has failed
Signal Boards Selftest
This section in the Selftest facility tests the Output Board and then
the Timing Board. It, is not automatically run at power-up. You can
start. this part of the Selftest routine as follows:
1.
2.
3.
4.
5.
6.
Switch the instrument ON
Wait for the Microprocessor Selftest to finish
Press (MORE) and CONFIG
1Jsing the cursor keys move the highlight down to
Perform Self test
Using the knob, select Signal
Press (ENTER)
Timing Board Selftest
Figure 5-1 shows the Selftest points on the Timing Board. This is
followed by a list of the possible failure messages.
TP: TST-DELTIGIN
TST-WDTIGIN
TST-PULSEOUT-N
TRIGGER OUT
/’
I *’ I
TRIGOUTN
L------W
Figure 5-l. Testpoints used in Timing Board Selftest
Troubleshooting 5-3