Kenwood TS-570D instruction manual Specialized Communicating, SPLIT-FREQUENCY Operation, Up/Dwn

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)”.

1Press [A/B] to select VFO A or VFO B.

•“tA” or “tB” appears to show which VFO is selected.

2Select the operating frequency.

•The frequency selected here will be used for transmitting.

3Press [A/B] to select the other VFO.

4Select the operating frequency.

•The frequency selected on this VFO will be used for receiving.

5Press [SPLIT].

• “SPLIT” appears.

•Pressing [A/B] reverses the receive frequency and the transmit frequency.

6Press [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.

1Activate split-frequency operation as explained in the previous section.

2Press 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.

3Release [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).

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