Specifications

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6-13 Configure audio filters (HPF / LPF)
An audio HPF (High Pass Filter) and a LPF (Low Pass Filter) are available.
6-13-1 Configure audio HPF (high pass filter)
The audio high pass filter is useful for limiting the audio bass response (allowing higher
tones to pass) improving intelligibility in certain circumstances (such as low frequency
whistles on AM, SSB & CW).
There are four available pass frequencies: 50Hz, 200Hz, 300Hz, and 400Hz.
The higher the frequency the more limited the audio bandwidth. For highest fidelity for
listening, select 50Hz. The filter selection can be set to auto mode to select the proper filter
setting automatically.
The default is AUTO.
To access the configuration menu, push the FUNC key and then push the 7 key.
Push the down arrow key to move the cursor to “HPF” selection point.
This menu is to configure the high pass filter.
Use the main tuning dial, the right arrow key or the left arrow key to select the desired high
pass filter setting (AUTO / 50Hz / 200Hz / 300 Hz or 400Hz).
Push the ENT key to accept the data and return to a standard display. Alternatively, push the
ESC key to abort entry, or, push the down arrow key to move to the next item on the
configuration menu (LPF).