Manually Selecting If Bandwidth - AOR AR-ONE Operating Manual

air. However, it is not simply a case of using the narrowest filter at all times, particular
modes
require differing amounts of bandwidth in order to operate otherwise the receive system
simply will not produce intelligible sound.
Correct receive mode and IF bandwidth must always be selected for optimum reception. If
the bandwidth selection is too narrow, distortion or signal break-up may occur. If the
bandwidth selection is too wide, adjacent interference may be encountered.
For this reason, a selection of IF filter bandwidths are fitted as standard. Typical examples
of
receive mode and IF bandwidth are:
300 KHz -- VHF FM broadcast (220 KHz may be also be used – mono only)
200 KHz -- VHF FM broadcast (110 KHz may be also be used – mono only)
100 KHz or 30 KHz – Wireless mic, etc. (30 KHz for satellite FAX, too)
16 KHz – PMR, amateur band, etc. FM 6 KHz may also be used
8.5 KHz or 6 KHz – VHF/UHF airband, short wave broadcast, medium & long wave, PMR,
etc.
3 KHz – Short wave amateur band, short wave utility such as oceanic airband etc.
0.5 KHz – Morse code used by radio amateurs and some marine traffic on short wave
An appropriate IF filter is automatically selected when automode is engaged. However any
combination of IF filter and receive mode is possible in the manual mode. When you have
manually selected an IF filter bandwidth, automode will be disengaged, but the receive
mode, step size, etc will be retained until they are changed manually.

2-7-1 Manually selecting IF bandwidth

Push the FUNC key, and then push the MODE key.
Selecting a new bandwidth from the list of 300, 200, 100, 30, 16, 8.5, 6, 3, and 0.5 KHz by
rotating the main tuning dial or arrow key. To accept the new bandwidth selection, push the
ENT key.
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