Frequency; Mode (Am/Fm/Wfm) - AOR AR1000 Manual

AR1000 Reference

Frequency

The frequency area shows you the current frequency in megahertz (MHz). To
enter kilohertz (KHz) frequencies, you must convert them to megahertz. For
example, 14500 KHz would be entered as 14.5 MHz. An AM radio frequency like
960 KHz would be entered .960 MHz.
When you are sitting on a scan channel, the MHz indicator will flash. This tells
you that you can enter a new frequency into the channel. When you press ENT,
the new frequency will become active. You will hear any transmissions on that
frequency (if you are in the correct mode). However, until you press a mode key,
the frequency won't be permanently programmed into that channel. If you don't
press a mode key, once you leave the channel, the frequency you entered will be
erased and the previous frequency will be restored.
You can enter a frequency to four decimal places. The frequency coverage for the
AR1000XC is .5 MHz to 1300 MHz. If you enter a frequency outside this range
you will see Fr. Err (frequency error) in the display. Press CLEAR to start over.

Mode (AM/FM/WFM)

There are three transmission modes you can set the AR1000 to receive. These are
AM, FM, and Wide FM. You set each scan channel and each search bank to listen
in a specific mode. When you are scanning or searching, you will see the mode of
the current scan channel or search bank in the display. If you program a scan bank
with channels having different reception modes, you will see the mode indicators
switching rapidly as the scanner scans.
The following is a list of typical mode usage according to frequency range.
AM mode is used for
.5 to 30 MHz
108 to 137 MHz Aircraft
225 to 400 MHz Military aircraft
FM (Narrow FM) mode is used for
30 to 54 MHz
136 to 174 MHz High band VHF
406 to 1300 MHz
WFM (Wide FM) mode is used for
54 to 88 MHz
88 to 108 MHz FM broadcast radio
174 to 220 MHz Channels 7 through 13 TV audio
AM Radio broadcast, shortwave, and citizens band
Low band VHF (Very High Frequency)
UHF (Ultra High Frequency)
Channels 2 through 6 TV audio
63