Troubleshooting Suggestions

Please read AN-2A ~ General Applications Information.
Be sure that your oscilloscope has sufficient bandwidth to display the waveform.
Make sure that you are not exceeding the maximum voltage ratings of the oscilloscope input, any probes used, and any attenuators used.
Make sure that any attenuators connected to the instrument have sufficient average and peak power ratings.
Try swapping your cables and attenuators with other ones.
Try using another oscilloscope.

Some models have rear-panel switches that allow analog control voltages to override the front-panel controls. Be sure that these switches are set appropriately.
Confirm that you have set the pulse width and the pulse delay to values less that the period (i.e., 1/frequency).
Most instruments are optimized for use near the maximum rated amplitude. If you wish to operate at very low amplitudes, consider operating at a high amplitude and reducing the output with attenuators, if practical.

Some instruments have fuses on the rear panel. Confirm that these fuses have not blown.
Some instruments have fuses inside the instrument. Consult the instruction manual for the locations of these fuses. Confirm that these fuses have not blown.

See the GPIB Troubleshooting Checklist section of the OP1B Interface Programming Manual. Certain less common GPIB controllers need an "EOS" character explicitly added to the end of command strings. See the "End-of-String (EOS) Issues" section of the programming manual for details.

If the liquid crystal display on your instrument appears to be behaving erratically, or displaying nothing, or only part of the expected text, contact Avtech or your local representative and request the "AV-RC4-MOD2 replacement ribbon cable". This is a field-installable replacement part that may fix this issue.

If you require further technical support, please send an email to info@avtechpulse.com.