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selector switch is in position A. If the channel selector switch is set to one of the stored channel
frequencies (any one of switch positions 1 through 4), then the channel frequency stored in that
memory location will appear in that display. If any other channel frequency is desired other than
those channel frequencies stored, then the channel selector switch should be set to position A
whereupon the desired frequency can be set using the MHz and kHz frequency selector dials.
2. Repeat steps 2 through 6 of Section 3.2.
3.4 Storing frequencies
Four memory locations are available for channel frequencies; each of these can be used to store any
channel frequency used for aircraft communications. They can be used in any desired order. To store,
proceed as follows :
a) Switch the channel selector switch to position A.
b) Use the MHz and kHz rotary switches to set the desired channel frequency.
c) Set the channel selector switch to the desired memory location.
d) Press the store button. For models with serial nos. of 4000 or above, the STORE button must be
held depressed for approx. 2 seconds.
NOTE
When overwriting a stored channel frequency, the same procedure as listed in steps a.
through d. should be followed.
3.5 Setting the emergency frequency
3.5.1 Setting the emergency frequency on models with serial numbers up to 3999
As already described in the operating instructions, the transceiver automatically switches to the
emergency frequency 121.500 MHz when the channel selector is positioned to A in switching the
transceiver on. To quickly switch to the emergency frequency in an emergency situation best procedure
is to switch the channel selector to A and to briefly switch the transceiver off/on, after which the
transceiver operates on the emergency frequency of 121.500 MHz. Under normal operating c onditions,
this can be set by means of the frequency selector switches. Another possibility is to store the
emergency frequency directly in one of the four available channels.
3.5.2 Setting the emergency frequency on models with serial numbers of 4000 or above
In models with serial numbers of 4000 or above, the emergency frequency 121.500 MHz does not
automatically appear when the channel selector switch is in position A and the transceiver is powered
up. It is recommended to store the distress frequency in one of the 4 memory locations.
In models with serial numbers of 4000 or above, an arrow flashes on and off in the LCD during
transmission. This is activated by the microprocessor, which outputs the instruction for this along with
the other data for the liquid-crystal display.
AR 3201 - ( )
Page 3-4 DV 28110.03/04 Issue 02/92