31
7 ENHANCED COMMUNICATIONS
FM REPEATER OPERATION
Most Amateur radio voice repeaters use a separate
reception and transmission frequency. The
transmission frequency may be higher or lower than
the reception 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/ 6 m band repeaters operate usually in the
29 MHz FM sub-band and 51-54 MHz 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 m FM provides reliable around-town
communications with the potential for sudden DX
from across the country or around the world.
Note:
◆
When programming 2 separate frequencies using 2 VFOs, be
sure to select FM mode on both VFOs.
◆
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.
1
Press
[A/B / M/V]
to select VFO A or VFO B.
•
“
t
A
” or “
t
B
” appears to show which VFO is
selected.
2
Turn the
Tuning
control or
MULTI
control to select
the reception frequency.
3
Press
[MODE]
to select FM mode {page 19}.
4
Press
[A=B/ SPLIT]
to duplicate the frequencies
and other data to the other VFO.
5
Turn the
Tuning
control or
MULTI
control to select
the transmission frequency.
•
The frequency selected on this VFO will be
used for transmission.
6
Press
[NB/T/ 7]
to turn the Tone function ON if the
repeater requires a subtone.
•
“T” appears.
•
Refer to “Selecting a Tone Frequency” for
more details on the subtone {page 32}.
•
To quit the Subtone function, press
[NB/T/ 7]
twice.
7
Press
[A=B/ SPLIT] (1 s)
.
•
“
” appears.
8
Press
[A/B / M/V]
to go back to the original
reception frequency.
9
Press Mic
[PTT]
to transmit.
•
The VFO changes to the other VFO to transmit.
•
Each time you press
[A/B / M/V]
, the reception
and the transmission frequency are swapped.
10
Press
[A=B/ SPLIT] (1 s)
to quit split-frequency
operation.
•
“
” disappears.
The data that you select in steps
1
to
8
can be stored
in memory. Refer to “Split-Frequency Channels”
{page 51}.
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 tone frequency stored in a memory channel,
recall the desired memory channel, and press
[NB/T/ 7] (1 s)
.
29.520 MHz
88.5 Hz
29.520 MHz
88.5 Hz
29.620 MHz
29.620 MHz
