Check The 4 Mhz Ref Signal - Agilent Technologies 8753ES Option 011 Service Manual

Receiver Troubleshooting

Check the 4 MHz REF Signal

Check the 4 MHz REF Signal
1. Connect a cable from the RF OUT port to input R.
2. Press .
Preset
3. Use an oscilloscope to observe the 4 MHz reference signal at A10P2-6.
• If the signal does not resemble
and path.
• If the signal is good, the probability is greater than 90% that the A10 assembly is
faulty. For confirmation, perform
Examination,"
Figure 8-3 4 MHz REF Waveform
8-8
Figure
"Check A10 by Substitution or Signal
next.
8-3, troubleshoot the signal source (A12P2-36)
Chapter 8