Audio Filters - HP 8902A Quick Reference Manual

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Program Code

Audio Filters

Program Code

FILTER, LP FILTER

High-pass and low-pass filters can be inserted in the path of the demodulated signal.

The filters are used for such tasks as rejecting interfering audio signals such as line hum and

sub-carriers. They also provide pre-defined bandwidths for residual noise measurements.

Insert the desired demodulated signal filter by selecting the appropriate keys. Only one high-pass and

one low-pass filter can be inserted at once.

remove a filter, select the key again.

To select a different filter, press the key corresponding to the desired filter.

HP-IB codes for the various filter keys (listed in the following table) only insert the filters. To remove

a high-pass or low-pass filter via HP-IB, use code HO o r LO (respectively), or select another filter.

HP-IB PROGRAM CODES

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