CHANNEL OPERATION AND PROGRAMMING
The 100 programmable channels available with the PS440 Control
Display Unit are easily programmed on the ground or in the air.
Channels are 00-99. Channel 00 is always turned to 2.182 MHz. In
addition, there are six emergency channels, five of which can be pro-
grammed. Channels are EMR 2 - EMR 6. EMR 1 is tuned to 2.182
MHz. It is the default channel and cannot be changed.
Simplex and semi-duplex frequency tuning also applies when program-
ming channels. It is important to know the requirements of the desired
ground station when programming frequencies.
In addition to assigning frequencies to a channel, a mode is also
The following steps illustrate how to select
already programmed channels.
1. Turn the left outer knob to CHAN as
shown in Figure 9. The last selected chan-
nel will be displayed.
2. Turn the right inner or outer knob to
select the desired channel number.
3. Momentarily press push-to-talk to tune
the antenna to the new channel frequency.
Emergency Channel Operation
Emergency channels typically use simplex operation. However channels
2 - 6 can be programmed for semi-duplex operation.
The emergency channels are programmed at the factory according to
Table 2. Only channels 2 - 6 may be changed.
Revision 0 Mar/2003
KHF 1050/PS440 Pilot's Guide