BendixKing KHF 990 - Manual (Page 53)

In manual operation mode four types of channels are available:
• 1 frequency agile
• 100 programmable manual channels
• 100 ALE channels
• 245 fixed ITU channels
FREQUENCY AGILE
The frequency agile channel mode provides the operator with a
scratch-pad area to make frequency and modulation changes without
modifying stored data. This mode is indicated by five underscores
“ _ _ _ _ _ “ in the channel type field and a channel number of zero
(0). The frequency agile mode is entered in two ways, it can be
selected by the operator or it is entered automatically when changes
are made to ITU or ALE channels.
ITU CHANNEL OPERATION
The ITU channels are stored in permanent memory and cannot be
changed by the operator. Tunes are not permanently stored for the
ITU channels. When an ITU channel is selected it is initially untuned.
Pressing the microphone key tunes both the receive and transmit fre-
quency for the current ITU channel. This tune information is saved in
RAM until the channel number, channel type or frequency is changed
by the operator. To allow the operator to listen on the transmit fre-
quency of the semi-duplex ITU channels, the SCAN key is used as a
receive on transmit frequency key. Pressing the SCAN key when an
ITU channel is selected changes the receiver to the transmit frequen-
cy. The transmit frequency is displayed and the communication field
indicats that the transmit frequency is being monitored.
NOTE: This function, listen on transmit frequency, is available only
for the ITU channels. Manually changing the communication field to
transmit (TX) does not change the receiver to the transmit frequency.
Selecting the transmit frequency with the communication field allows
the operator to change or view the transmit frequency.
CHANGES TO ALE AND ITU CHANNELS
The stored data for ALE and ITU channels cannot be modified.
When the operator modifies the frequency or modulation type of an
ALE or ITU channel the channel type reverts to the ‘frequency agile’.
Operation
3-16 KHF 950/990 Pilots Guide
Rev. 0
Dec/96