Technical data

Chapter 7 7-25
Source Troubleshooting
Phase Lock Error
Figure 7-22 H MB Signal at A14P1-5 (Preset and 16 MHz to 31 MHz Sweep)
A7 Pulse Generator Check
The pulse generator affects phase lock in high band only. It can be checked with either a
spectrum analyzer or an oscilloscope.
A7 Pulse Generator Check with Spectrum Analyzer
1. Remove the A7-to-A6 SMB cable (W7) from the A7 pulse generator assembly. Set the
analyzer to generate a 16 MHz CW signal. Connect the spectrum analyzer to the A7
output connector and observe the signal. The A7 comb should resemble the spectral
display in Figure 7-23.
Figure 7-23 Pulse Generator Output