652 Chapter 18
Troubleshooting
Basic Signal Generator Operations
Data Storage
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, follow these steps:
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 E4428C/38C ESG Signal Generators Service Guide for battery replacement instructions.
Saved an Instrument State in a Register but the Register is Empty or Contains the Wrong State
If you have selected a register number that is greater than 99, the signal generator will automatically select
register 99 to save your instrument state.
If the register number you intended to use is empty or contains the wrong instrument state, press the
following keys:
Recall > 99 > Enter.
This recalls register 99. The lost instrument state may be saved there.
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