Control Instructions - Icom IC-280E Instruction Manual

CONTROL INSTRUCTIONS
Duplex /Simplex Select Switch
For repeater use, set this switch to the Duplex position by depressing to the locked in position.
By depressing again, the switch returns to the out position for Simplex operation.
Duplex Mode Select Switch
There are two modes for repeater operation. With most repeaters, the required transmitting
frequency (repeater input frequency) is 600KHz below the receiving frequency (repeater output
frequency). This switch is to select 600KHz below or 600KHz above the receiving frequency.
When the switch is locked in by depressing it, the transmitting frequency is set at G00KHz above
the receiving frequency and reversed when the switch is in the out position by depressing again. In
Simplex mode, this switch may be set at either position. -
Memory-Write Switch
After setting the tuning control to the desired frequency with the Memory Channel switch in the
"D"' position, set the Memory Channel switch to the channel to be programmed (1, 2 or 3). One
push of the M-Write switch erases the previous programmed frequency and programs the new
frequency. (Depressing the M-Write switch when the Memory Channel switch is set at "D" neither
erases nor programs a frequency.)
Memory Channel Switch
Selects operation with the tuning control ("D" position) or operation with the memory channels
(1,2 ог 3). See "PROGRAMMING THE MEMORY CHANNELS" on page 9 for more details.
Meter
The numbers on the S-meter represent S1 through S9 and 20, 40 and 60dB over S9. The RF
output level meter functions only as a relative output meter and does not indicate the wattage.
These functions are switched automatically when T/R switching is made.
Tuning Control
The tuning control sets the operating frequency in 25КН2 steps.
This dial has 5O positions per turn.
Tone Call Button
Most repeaters require a 1750Hz Tone-burst for initial access.
In the transmitting mode, by depressing the Tone Call Button for the required period for a
repeater, the tone burst generator actuates and you can access the repeater.
"VOL Control and Power ON/OFF Switch
When the control is turned completely CCW, the power is OFF. By turning the control CW
beyond the "click", the unit is turned ON and the audio level increases by further rotating it CW.
SQL Control and High/Low Power Switch
Turning this control CW sets the squelch threshold higher. To turn OFF the SQL function, turn
this control completely CCW.
By pulling the Squelch control knob, the RF output power is reduced to 1 watt. By depressing
the knob to the normal position, the RF output power returns to 10 watts.
Frequency Display
The three large digital LED's represent 1MHz, 100KHz and 10KHz digits. When the 5KHz display
is needed, a small "5" is illuminated at the bottom right corner of the frequency display.