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24
6 ENHANCED COMMUNICATIONS
SPLIT-FREQUENCY OPERATION
Usually you can communicate with other stations
using a single frequency for receiving and transmitting.
In this case, you select only one frequency on either
VFO A or VFO B. However, there are cases where
you must select one frequency for receiving and a
different frequency for transmitting. This requires the
use of 2 VFOs. This is referred to as “split-frequency
operation”. One typical case which requires this type
of operation is when you use an FM repeater {page
25}. Another typical case is when you call a rare DX
station.
When a rare or desirable DX station is heard, that
operator may immediately get many simultaneous
responses. Often, such a station is lost under the noise
and confusion of many calling stations. If you fi nd that
you are suddenly being called by many operators, it
is your responsibility to control the situation. You may
announce that you will be “listening up 5 (kHz, from
your present transmission frequency)”, or “listening
down between 5 and 10 (kHz)”.
1 Press [A/B (A=B)] to select VFO A or VFO B.
• “
” or “ ” appears to show which VFO is
selected.
2 Select an operating frequency.
• This frequency will be used for transmission.
• To copy the selected VFO frequency to the
other VFO, press and hold [A/B (A=B)].
3 Press [A/B (A=B)] to select the other VFO.
4 Select an operating frequency.
• This frequency will be used for reception.
5 Press [SPLIT].
• “
” appears.
• Each time you press [A/B (A=B)], the reception
and transmission frequencies are swapped.
6 To quit split-frequency operation, press [SPLIT]
again.
• “
” disappears.
DIRECTLY ENTERING THE FREQUENCY SPLIT
SPECIFIED BY A DXer
To directly enter the difference between the TX
and RX frequencies specifi ed by a DXer, follow the
instruction below while receiving on the main band of
a signal from the DXer.
1 Press and hold [SPLIT].
• “
” blinks.
2 Enter the frequency difference (the “split”) in the
order of kHz as specifi ed by the DX station.
• If the frequency specifi ed by the DXer is higher
than your current frequency, enter the specifi ed
frequency in the order of kHz using the numeric
and band-select keypad. Conversely, if the
specifi ed frequency is lower, prefi x a value of
"0" to the frequency.
• For example, enter a value “5” if you need
to increment the frequency by 5 kHz, and
enter a value “05” if you need to decrement
the frequency by 5 kHz. When the input is
completed, the transmitted frequency is set,
split operation is enabled, and “ ” stops
blinking and remains lit.
TURN THE TUNING CONTROL TO SEARCH FOR
THE TRANSMIT FREQUENCY
To directly search for the transmit frequency by
rotating the Tuning control, follow the instruction
below while receiving on the main band of a signal
from the DX station.
1 Press and hold [SPLIT].
• “ ” blinks.
2 Turn the Tuning control to search for the frequency.
• Press [CLR] to stop searching.
3 Press [SPLIT] to end.
• The frequency is confi gured as the transmit
frequency and split operation begins.
• “ ” lights.
TF-SET (TRANSMISSION FREQUENCY SET)
TF-SET allows you to temporarily switch your
transmission frequency and reception frequency.
Canceling this function immediately restores the
original transmission and reception frequencies.
By activating TF-SET, you can listen on your transmit
frequency, and change it while listening. This allows
you to check whether or not the newly selected
transmission frequency is free of interference.
1 Confi gure split-frequency operation as explained in
the previous section.
2 Press and hold [TF-SET], then turn the Tuning
control or press Mic [UP]/ [DWN] to change the
transmission frequency.
• The transceiver receives on the frequency as
you change, but the frequency shown on the
sub-display (the original reception frequency)
stays unchanged.
3 Release [TF-SET].
• You are now receiving again on your original
reception frequency.
Successfully contacting a DX station in a pileup
often depends on making a well-timed call on a clear
frequency. That is, it is important to select a relatively
clear transmission frequency and to transmit at the
exact instant when the DX station is listening but the
majority of the groups aren’t transmitting. Switch
your reception and transmission frequencies by using
the TF-SET function and listen to your transmission