NOTE: As the radio scans, it blinks tie decimal point an the L. E, D. display. When it detects a singal on a channel, the radio displays MCM and the number of the channel, 0-7. (exsample; CO indicates signal detected at the MANUAL channel frequency. ) The radio "lacks in" a channel at the same time, allowing the operator to hear the recieved signal. The radio continues to lock in a channel as long as the sigal is being recieved. The display blanks after a few seconds.
When contact is broken, the radio cantiues to scan, begining with the next channel.
The radio scans at a rate of approximately 10 channels per seconds. Vhen scanning fewer than 8 channels, it my be more advantageous to load the sane frequencies more than once - using otherwise unused channels to shorten scan responce time.
* The radio allows transmission in the SCAN mode ON CHANNELS SELECTED BY THE CHANNEL CONTROL, The antenna is automatically tuned for transmission on this channel in SCAN mode.
* , When using this feature, remember that the radio will continue scanning in this mode when not transmitting- ( The radio could lock in a channel different from the one you are using, tempotarily preventing you from receiving in this mode. Keying the handset puts the radio set back on the channel selected on channel control.)
(1) With the AN/PRC-117 VHF-FX , channels 5-7 are dedicated for frequency-hopping ECCM transmission and reception.
NOTE; The radio cannot detect ECCK transmission while in the SCAN mode.
NOTE: The radio does not transmit a freqency-hopping signal when keyed in SCAN mode,
ECCM operations is not compatible with SCAN mode operation because of the unique charcteristics of the frequency-hopping signal.
(2) In scan modet the radio treats ECCM channels 5 - 7 in the same as other radio shannels. It scans the frequnecy entered in any of these channels for a received signal. It transmits when keyed in channels 5, 6, or 7 but this transmission is not ECCX FREQUENCY-HOPPING transmission.
a. To program ECCK channels, use steps of PROGRAMMING FREQUENCY.
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