User's Manual

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 22}. 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 transceier.
•“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 group 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.