HP 8753E Service Manual

Check the 4 MHz REF Signal
1. Press w.
2. Use an oscilloscope to observe the 4 MHz reference signal at AlOP2-6.
q If the signal does not resemble Figure 8-3, troubleshoot the signal source
(A12P2-36) and path.
q If the signal is good, the probability is greater than 90% that the A10
assembly is faulty. For confirmation, perform “Check A10 by Substitution
or Signal Examination”.
-500.000 nmec
0.00000 ma0
soo.000 Mac
iA
I
I
I
f/ I
/
I
/
A
/
I
\ / \
/t \ /
\ /
I
I
Ch. 1 -
1.000 volt.s/d,v
Offmet
- 0.000 Volts
TImebase -
100 nwc/div
OIlOY
- o.ooooo se=
sg603s
Figure 8-3. 4 MHz RJIF Waveform
Receiver Troubleshooting 8-7

HP 8753E Specifications

General

Brand	HP
Model	8753E
Category	Measuring Instruments
Language	English