Icom IC-251A Instruction Manual page 20

—~18—
NOTE: The MS, 1, [2], and positions are described in the "MEMORY CHANNEL OPE-
RATION" on.page 20.
M When the IC-251A/E is first turned ON, 145.000.0MHz is preset into the ''A'' VFO and
145.600.0MHz is preset into '"B'' VFO.
FOR EXAMPLE:
When the VFO/MEMORY Switch is set in the "A'' position and the set is turned ON, 145.000.0
will be displayed on the readout. This will occur whether the VFO/MEMORY Switch is in either
the "A" or ""RA-TB" or Memory Channels positions.
When the VFO/MEMORY Switch is set in the "B" position or '""RB-TA"' position, 145.600.0 will
be displayed on the readout. Rotating the tuning knob clockwise will increase the frequency, and
rotating the tuning knob counterclockwise will decrease the frequency in 100Hz steps. (5KHz
steps in the FM mode)
M Switching from one VFO to the other VFO does not clear the first VFO. The frequency is
retained in the VFO's memory.
FOR EXAMPLE:
if 145.125.0MHz is set with "A" VFO, and the VFO switch is set to "B" VFO, the frequency
readout will show "B" VFO's frequency, but 145.125.0MHz is still stored in ""A'' VFO's memory.
Returning the VFO Switch to "A" VFO position, and 145.125.0 will be displayed on the readout.
Accordingly, if the switch is placed in the ''B'' VFO position, the frequency that was set with the
"B" VEO will appear. This allows you to set a certain frequency with one VFO, work up and
down the band with the other VFO, and periodically check the set frequency simply by switching
between "A" and "B" VFO. It also allows you to search for a clear frequency with one VFO,
while keeping your operating frequency on the other VFO. When you have found a clear fre-
quency, switch back to your operating frequency, inform the station you are in contact with of
the new frequency, and switch back. It's that simple!
BM "RA-TB" or "RB-TA" positions will allow you to operate a repeater or split transmit/receive
frequencies.
FOR EXAMPLE:
Set the VFOAVEMORY Switch in the RA-TB or RB-TA position and turn the POWER Switch ON.
"B'' VFO will be preset GOOKHz above ''A" VFO.
Set "A" VFO to 145.125.0MHz or "B" VFO to 145.725.0MHz. Then set the VFO/MEMORY
Switch to the ""RB-TA" position. 145.725.0MHz will be shown on the readout during receive ("B"'
VFO) and 145.125.0MHz during transmit ("A'' VFO). You are now receiving on 145.725.0MHz
and transmitting on 145.125.0MHz, so you can access an 145.125/145.725 repeater.
If you change the receiving ("B'' VFO) frequency, the transmitting (''A'' VFO) frequency will
follow the receiving frequency at the same frequency difference. So, first, set ""A'' VFO or "B"
VFO at the frequencies for repeater input/output frequency. This makes repeater operation
simple.