STANDARD OFFSETS
TR270 Repeater Offsets (Auto mode, Setup #00 = 1):
Repeater Frequency
Offset
(MHz)
144.000 - 145.095
Simplex
145.100 - 145.495
-600 kHz
145.500 - 145.995
Simplex
146.000 - 146.395
+600 kHz
146.400 - 146.595
Simplex
146.600 - 146.995
-600 kHz
147.000 - 147.395
+600 kHz
147.400 - 147.595
Simplex
147.600 - 147.995
-600 kHz
To receive:
1) Select the desired frequency as was described for the
Simplex mode of operation.
2) Adjust the volume control for a comfortable listening
level.
3) Adjust the squelch control as required.
To transmit:
1) Be certain that the VOICE mode has been selected
with the
MODE
B
button.
2) Select a ‘Standard’ offset with the
4
RPT
button appro-
priate for the repeater frequency. If the indicated
frequency is in a ‘Standard’ offset range as outlined in
the previously listed table, and SETUP #00 is set for ‘1’
(factory default setting), the TR270 will automatically
select and display the proper offset.
3) Press the
P. OUT
C
button to select the desired transmit
power. Usually a Low power setting is sufficient to ‘hit’
the repeater (provide a good quality signal to the
repeater).
4) Monitor the frequency prior to actually transmitting to
ensure that you will not interfere with anyone else trying
to use the repeater.
5) Press and hold the PTT (Push-to-talk) button on the
microphone and speak into the microphone at a normal
voice level. The display will change to indicate the
transmit frequency.
6) Release the PTT button when you are finished speak-
ing to return the TR270 to the receive mode.
CUSTOM OFFSETS
Sometimes, the input and output frequencies of a
repeater will not follow a “standard” convention. For
example, the input frequency could be located at one
end of the 2-meter band, and the output located at the
other end of the band. This type of repeater would
require a “custom” offset. The TR270 is easily pro-
grammed for “custom” offsets.
1) Press the
MODE
B
button to set the VOICE mode, if not
already set.
2) Enter a valid transmit frequency in VFO 1.
3) Enter a valid receive frequency in VFO 2.
4) Press and hold the
4
RPT
button until
both
the ‘+’ and
‘-’ indicators are displayed.
Voice Operation 27
VOICE OPERATION
The TR270 is capable of FM voice operation over a
simplex or repeater frequency pair. Additionally, by
using receiver ‘B’, a crossband repeat function is also
available. Other selectable options include subaudible
tone encode/decode, receiver subaudible tone filter
selection, and full DTMF [Dual-Tone Multi Frequency;
Touch Tone ®] operation.
NOTE: VOICE/DATA modes can be stored using memory
channels. Factory defaults are set appropriately for
many areas of the United States.
FM SIMPLEX OPERATION
To receive:
1) Select receiver ‘A’ and VFO 1.
2) Tune to the desired frequency by either the main
tuning wheel,
/
buttons, or by direct entry.
3. Adjust the volume control for a comfortable listening
level.
4. Adjust the squelch control as required. The control is
usually set to a point where the receiver audio just mutes
when no stations are being received.
To transmit:
1) Be certain that the VOICE mode has been selected
with the
MODE
B
button.
2) Press the
4
RPT
button until ‘+’ or ‘-’ is extinguished. If
the indicated frequency is a standard simplex fre-
quency, and SETUP #00 is set for ‘1’ (factory default
setting), the ‘+’ or ‘-’ will be automatically turned off.
3) Press the
P. OUT
C
button to select the desired transmit
power, remembering that it is good practice to use as
little power as necessary to establish a contact.
4) Monitor the frequency prior to actually transmitting to
ensure that you will not interfere with anyone else trying
to use the frequency.
5) Press and hold the PTT (Push-to-talk) button on the
microphone and speak into the microphone at a normal
voice level.
6) Release the PTT button when you are finished speak-
ing to return the TR270 to the receive mode.
REPEATER OPERATION
Repeater operation allows communications over far
greater distances than the simplex mode usually pro-
vides. Typically the repeater is located on a tall structure
or mountain. Repeaters are designed to receive on a
certain input frequency and repeat on a different
output frequency. The input and output frequencies are
separated by an offset frquency, u or - 600 kHz.
Most amateur radio repeaters utilize this ‘Standard’
offset format. In some rare instances, this standard offset
is abandoned, and the input and output frequency
offset is a ‘Custom’ offset format. The TR270 is capable
of handling both ‘Standard’ and ‘Custom’ offsets.