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31
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 two 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 32}. 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
find 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 transmit frequency)”, or
“listening down between 5 and 10 (kHz)”.
1 Press [MAIN], [A/B] to select VFO A or VFO B on
the main transceiver.
•“tA” or “tB” appears to show which VFO is
selected.
2 Select an operating frequency.
The frequency selected at this point will be
used for transmitting.
To copy the selected VFO frequency to the
other VFO, press [A=B].
3 Press [A/B] to select the other VFO.
4 Select an operating frequency.
The frequency selected on this VFO will be
used for receiving.
5 Press [SPLIT].
“SPLIT” appears.
Each press of [A/B] reverses the receive and
transmit frequencies.
6 To quit split-frequency operation, press [SPLIT]
again.
“SPLIT” disappears.
If you access Menu No. 06A and select “ON”, you can
recall a memory channel to use for either receiving or
transmitting. For more information, refer to “Memory-
VFO Split Operation” {page 60} under “MEMORY
FEATURES”.
Note: You cannot perform SPLIT operation on the sub-receiver; it
has only one VFO.
TF-SET (TRANSMIT FREQUENCY SET)
TF-SET allows you to temporarily switch your transmit
frequency and receive frequency. Canceling this
function immediately restores the original transmit and
receive 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 transmit frequency is free of
interference.
1 Configure split-frequency operation as explained
in the previous section.
2 Press and hold [TF-SET].
3 While holding down [TF-SET], change the
operating frequency by turning the Tuning control
or by pressing Mic [UP]/ [DWN].
The transceiver receives on the frequency that
you select, but the frequency shown on the
sub-display stays unchanged.
4 Release [TF-SET].
You are now receiving again on your original
receive 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 transmit 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 receive and transmit frequencies by using TF-
SET and listen. You will soon learn the rhythm of the
DX station and the pileup. The more proficient you
become at using this function, the more DX stations
you will contact.
Note:
If you press [FUNC], [ATT/ F LOCK] to lock the operating
frequency before using TF-SET, pressing an incorrect button by
mistake retains the original receive frequency.
TF-SET is disabled while transmitting.
If you have recalled a memory channel (excluding CH 290 to
299), you cannot change the recalled frequency using the
Tuning control.
To enable the Tuning control, access Menu No. 06B and select
“ON”. Pressing Mic [UP]/ [DWN] after recalling a memory
channel changes the memory channels.
An RIT frequency shift is not added; however, an XIT frequency
shift is added to the transmit frequency.
39


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