Chapter 7 Specialized Communicating; Split-Frequency Operation; Tf-Set (Transmit Frequency Set) - Kenwood TS-570D, TS-570S Instruction Manual

SPECIALIZED COMMUNICATING

SPLIT-FREQUENCY OPERATION

Usually you can communicate with other stations using
the same 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 another
frequency for transmitting. To do this requires two
VFOs. This is referred to as "split-frequency operation".
One typical case that requires this type of operation is
described below.
When a rare or desirable DX station is heard, he or she
may immediately get many responses, all at the same
time. Often such a station is lost under the noise and
confusion of many calling stations. If you find that you
are suddenly being called as that rare or desirable
station, 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 [A/B] to select VFO A or VFO B.
• "tA" or "tB" appears to show which VFO is
selected.
2 Select the operating frequency.
• The frequency selected here will be used for
transmitting.
3 Press [A/B] to select the other VFO.
4 Select the operating frequency.
• The frequency selected on this VFO will be used
for receiving.
5 Press [SPLIT].
• "SPLIT" appears.
• Pressing [A/B] reverses the receive frequency
and the transmit frequency.
6 Press [SPLIT] to quit split-frequency operation.
• "SPLIT" disappears.
If you access Menu No. 07 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 41} under "MEMORY
FEATURES".
Note: If you configure split frequencies using two different bands to
perform CW operation, select Semi Break-in.

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 if the newly selected
transmit frequency is free of interference.
1 Activate split-frequency operation as explained in the
previous section.
2 Press and hold [TF-SET]. While holding down
[TF-SET], change the operating frequency by
turning the Tuning control or pressing Mic
[UP]/[DWN].
• The transceiver receives on the frequency that
you select, but the frequency shown on the sub-
display stays unchanged.
3 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. The best way to know if your intended
transmit frequency is clear is to use TF-SET. Switch
your receive frequency and transmit frequency by using
TF-SET and listen. You soon will learn the rhythm of
the DX station and the pileup.
Use the information 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. The more proficient you become at
using this function, the more DX you will contact.
Note:
If you press [F.LOCK] before using TF-SET, pressing an
incorrect button by mistake will not change the original receive
frequency.
TF-SET is disabled while transmitting.
If you recalled a memory channel (excluding CH 90 to 99), you
must set Menu No. 08 to ON to use TF-SET to change the
frequency of the memory channel.
An RIT frequency shift is not added; however, an XIT frequency
shift is added to the transmit frequency.
TF-SET is also enabled while operating with the same TX/RX
frequency (non-split).
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
23