Icom IC260-A Instruction Manual page 23

FM OPERATION
1.
RECEIVING
Set knobs and switches as follows.
MODE SELECT SWITCH FM
VFO GANG SWITCH GANG (out)
VFO/MEMORY SWITCH AorB
SQUELCH CONTROL Completely counterclockwise
Other knobs and switches are set the same as for SSB reception.
When the IC-260A/E is first turned ON, "A" VFO will be preset at 145.000MHz and "B"
VFO will be preset at 145.600MHz. This frequency defference is normal repeater input/
output frequency separation.
If you desire to operate repeaters or split transmit/receive frequencies that have a frequency
difference other than --c600KHz, set the "А" VFO and "B" VFO frequencies to make desired
repeater input/output frequency separation or split transmit/receive frequencies.
Turn the Volume Control clockwise to a comfortable audio level.
If no signal can be heard but only noise, turn the Squelch Control clockwise until the noise
from the speaker stops and set it just below this threshold. (When adjusting the Squelch
Control setting, if some communication signals can be heard, turn the tuning control either
direction and set it where only noise can be heard.) Your transceiver will now remain silent
until an in-coming signal is received which opens the squelch and lights the RECEIVE in-
dicator. If the squelch is unstable due to the reception of weak or mobile stations, adjust the
squelch control further until the proper threshold is obtained.
The meter indicates the signal strength of the incoming signals and is calibrated in S units and
dB over S9.
The NOISE BLANKER and the AGC circuits do not actuate in this mode.
Turn the tuning control to the desired frequency.
For tuning and Memory Channel operation refer to "HOW TO TUNE" on page 13 and
"MEMORY CHANNEL OPERATION" on page 18.
TRANSMITTING |
For simplex operation, set VFO/MEMORY Switch in the "А", "B" ог 1--(3| memory channel
position.
The operating frequency is selectable with the VFO/MEMORY Switch and the Tuning Control
knob.
For duplex operation, set the VFO/MEMORY Switch in the "RA-TB" or "ВВ-ТА" position.
іп the "RA-TB" position, the receiving frequency is controlled by "А" VFO and the trans-
mitting frequency is controlled by "B" VFO.
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