242 Chapter4
Troubleshooting the Analyzer
Using the Internal Service-Diagnostic Routines
Verify the main coil driver
This service-diagnostic routine verifies that the ramp is driving the
YTO.
1. Select a single band (if more than one band is available on your
analyzer).
Note that any band is acceptable unless the problem is isolated to a
specific band. In that case, choose the appropriate band. Figure 4-9
uses Band 0 as an example.
2. Return to the diagnostics menu by pressing the following analyzer
keys.
FREQUENCY, BAND LOCK, 0-2.9 GHz BAND 0
CAL, More 1 of 4, More 2 of 4
SERV DIAG, More 1
3. Verify the main coil driver by pressing MAIN COIL DRIVE.
• If the signal trace is similar to Figure 4-9, the main coil driver is
functioning properly.
• If the signal is not similar, suspect the A7 analog interface
assembly.
Figure 4-9 Main Coil Driver Typical Display
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