Chapter 4 245
Troubleshooting the Analyzer
Using the Internal Service-Diagnostic Routines
Verify the sweep ramp
1. Verify the sweep ramp by pressing:
SPAN, 10, MHz, CAL, More 1 of 4, More 2 of 4,
SERV DIAG, More 1, More 2, SWEEP RAMP
• If the signal trace is similar to Figure 4-12 the sweep ramp is
functioning properly.
NOTE Before a successful frequency calibration is performed, the ramp will
not be corner to corner, but will have some overshoot or undershoot.
• If the signal is not similar suspect the A7 analog interface board
assembly. Refer to Chapter 6 for further information about
troubleshooting the A7 board assembly.
2. Change the analyzer sweep time.
NOTE It is recommended that all sweep times be checked due to the A7 analog
interface board assembly operating differently for the different RC
combinations. This can result in the analyzer appearing to operate
properly in one sweep time and not in another.
Figure 4-12 Typical Sweep Ramp Display
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