Fm Repeater Operation - Kenwood TS-570D, TS-570S Instruction Manual

7 SPECIALIZED COMMUNICATING

FM REPEATER OPERATION

1
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
2
transmit a subtone before the repeater can be used.
Compared to simplex communication, you can usually
transmit over much greater distances by using a
3
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
4 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
5
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
6 around the world.
29.520 MHz
7
88.5 Hz
8
29.620 MHz
9
<<< DISPLAY (18L) >>>
10
11
ARRL 10-METER BAND PLAN
Frequency Range (kHz)
12
28000~28070
28070~28150
28120~28189
28190~28300
13
28300~29300
(29000~29200)
29300~29510
14
29510~29590
29600
29610~29700
15
1
Repeater frequency pairs (input/output):
29520/29620, 29540/29640, 29560/29660,
29580/29680
16
24
29.620 MHz
29.520 MHz
88.5 Hz
Mode/Activity
CW
RTTY
Packet
Beacons
Phone
(AM)
Satellite downlinks
Repeater inputs 1
FM simplex calling
Repeater outputs 1
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 [FM/AM] to select FM mode.
• "FM" appears.
4 Press [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].
5 Select the operating frequency.
• The frequency selected on this VFO will be used
for receiving.
6 Press [FM/AM] to select FM mode.
7 Press [SPLIT].
• "SPLIT" appears.
• Pressing [A/B] reverses the receive frequency
and the transmit frequency.
8 Select the subtone frequency via Menu Nos.
18 and 19.
• See "SELECTING SUBTONE FREQUENCY"
and "CONTINUOUS OR BURST SUBTONES?"
for more details on the subtone.
9 Press [AGC/TONE] to activate the Subtone function.
• "T" appears.
• To quit the Subtone function, press [AGC/TONE]
twice.
10 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".
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.