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Chapter 12 249
Troubleshooting
Data Storage Problems
4. Observe if the Dwell Type List Step softkey is set to Step.
When Step is selected, the signal generator will sweep the list points using the dwell time set for
step sweep rather than the sweep list dwell values.
To view the step sweep dwell time, follow these steps:
a. Press
Configure Step Sweep.
b. Observe the value set for the
Step Dwell softkey.
List Sweep Information is Missing from a Recalled Register
List sweep information is not stored as part of the instrument state in an instrument state register.
Only the current list sweep is available to the signal generator. List sweep data can be stored in the
instrument catalog. For instructions, see “Storing Files to the Memory Catalog” on page 56.
Data Storage Problems
Registers With Previously Stored Instrument States are Empty
The save/recall registers are backed-up by a battery when line power to the signal generator is not
connected. The battery may need to be replaced.
To verify that the battery has failed:
1. Turn off line power to the signal generator.
2. Unplug the signal generator from line power.
3. Plug in the signal generator.
4. Turn on the signal generator.
5. Observe the display for error messages.
If either error message −311 or −700 is stored in the error message queue, the signal generator’s
battery has failed.
6. Refer to the E8257D/67D PSG Signal Generators Service Guide for battery replacement
instructions.
Saved Instrument State, but Register is Empty or Contains Wrong State
If you select a register number greater than 99, the signal generator automatically selects register 99
to save the instrument state.
If the register number you intended to use is empty or contains the wrong instrument state, recall
register 99:
Press
Recall > 99 > Enter.
The lost instrument state may be saved there.