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250 Chapter 12
Troubleshooting
Cannot Turn Off Help Mode
Cannot Turn Off Help Mode
1. Press Utility > Instrument Info/Help Mode
2. Press
Help Mode Single Cont until Single is highlighted.
The signal generator has two help modes; single and continuous.
When you press
Help in single mode (the factory preset condition), help text is provided for the next
key you press. Pressing another key will exit the help mode and activate the key’s function.
When you press
Help in continuous mode, help text is provided for the next key you press and that
key’s function is also activated (except for
Preset). You will stay in help mode until you press Help
again or change to single mode.
Signal Generator Locks Up
If the signal generator is locked up, check the following:
• Make sure that the signal generator is not in remote mode (in remote mode, the R annunciator
appears on the display). To exit remote mode and unlock the front panel keypad, press
Local.
• Make sure that the signal generator is not in local lockout condition. Local lockout prevents front
panel operation. For more information on local lockout, refer to the E8257D/67D PSG Signal
Generators Programming Guide.
• Check for a progress bar on the signal generator display, which indicates that an operation is in
progress.
• Press
Preset.
• Cycle power on the signal generator.
Fail-Safe Recovery Sequence
Use the fail-safe recovery sequence only if the previous suggestions do not resolve the problem.
CAUTION This process does reset the signal generator, but it also destroys the following types of
data:
• all user files (instrument state and data files)
•DCFM/DCΦM calibration data
• persistent states
NOTE Do not attempt to perform any other front panel or remote operations during the fail-safe
sequence.
To run the fail-safe sequence, follow these steps:
1. Hold down the
Preset key while cycling power.
2. Continue to hold down the
Preset key until the following message is displayed:
WARNING You are entering the diagnostics menu which can cause unpredictable instrument
behavior. Are you sure you want to continue?