Kenwood TS-570D instruction manual Fm Repeater Operation, Specialized Communicating

7 SPECIALIZED COMMUNICATING

FM REPEATER OPERATION

Most Amateur radio voice repeaters use a separate receive and transmit frequency. The transmit frequency may be higher or lower than the receive frequency. In addition, some repeaters may require the transceiver to transmit a subtone before the repeater can be used.

Compared to simplex communication, you can usually transmit over much greater distances by using a repeater. Repeaters are typically located on a mountain top or other elevated location. Often they operate at higher ERP (Effective Radiated Power) than a typical station. This combination of elevation and high ERP allows communications over considerable distances.

HF repeaters operate only in the 29 MHz FM sub-band. This special service combines the advantages of FM operation, good fidelity with noise and interference immunity, with the excitement of HF DX (long distance) communications. Even on a quiet day, 10 meter FM provides reliable around-town communications with the potential for sudden DX from across the country or around the world.

29.520 MHz
88.5 Hz	29.620 MHz

29.620 MHz	29.520 MHz
	88.5 Hz

DISPLAY (18L) >>>

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 [FM/AM] to select FM mode.

• “FM” appears.

4Press [A/B] to select the other VFO.

•To copy the frequency that you select in step 2 to another VFO, press [A=B] before pressing [A/B].

5Select the operating frequency.

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

6Press [FM/AM] to select FM mode.

7Press [SPLIT].

•“SPLIT” appears.

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

8Select the subtone frequency via Menu Nos. 18￿and￿19.

•See “SELECTING SUBTONE FREQUENCY” and “CONTINUOUS OR BURST SUBTONES?” for more details on the subtone.

9Press [AGC/TONE] to activate the Subtone function.

• “T” appears.

ARRL 10-METER BAND PLAN

Frequency Range (kHz)	Mode/Activity
28000~28070	CW
28070~28150	RTTY
28120~28189	Packet
28190~28300	Beacons
28300~29300	Phone
(29000~29200)	(AM)
29300~29510	Satellite downlinks
29510~29590	Repeater inputs 1
29600	FM simplex calling
29610~29700	Repeater outputs 1

1Repeater frequency pairs (input/output): 29520/29620, 29540/29640, 29560/29660, 29580/29680

•To quit the Subtone function, press [AGC/TONE] twice.

10Press [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”.

The data that you select in steps 1 to 9 except for subtone duration can be stored in memory. Refer to “Split-Frequency Channels” {page 40}.

Note:

◆When operating through a repeater, over deviation caused by speaking too loudly into the microphone can cause your signal to “talk-off” (break up) through the repeater.

◆To check the subtone frequency stored in a memory channel, recall the desired memory channel, and access Menu No. 18.

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