Tuning Control - Icom IC260-A Instruction Manual

TUNING CONTROL
The click stops of the knob change іп 100Hz steps in the SSB or CW modes, or 5KHz steps in the
FM mode (1KHz when the TS Switch is pushed IN). The smaller vernier marks on the knob
represent two click stops and the larger marks represent ten click stops. One complete rotation of
the tuning knob results frequency increase or decreases of a 5KHz (250KHz in FM mode and
БОКН2 when the TS Switch is pushed IN).
When you reach 145.999.9MHz in the SSB or CW modes, or 145.995MHz in FM mode (145.999
MHz when the TS Switch is pushed IN) turning the Tuning Control Knob clockwise will bring the
operating frequency to 144.000MHz, the lowest edge, and you can continue increasing the fre-
quency from there by continuing to rotate the Knob clockwise. The VFO endless system func-
tions in the same way when decreasing the frequency from 144.000МН2, and will prevent you
from inadvertently operating out of the amateur radio band. (IC-260A : 145.999.9MHz and
144.000MHz should be read 148.199.9MHz and 143.800MHz.)
TUNING SPEED (TS) SWITCH
By pushing the TS Switch IN, the frequency is increased or decreased in 1KHz steps in any mode.
In the SSB or CW modes, when the TS switch is pushed IN, the decimal point of the 1KHz digit,
and the 100Hz digit are turned OFF, and the click stops of the tuning knob change in 1KHz steps.
If the 100Hz digit of the previous operating frequency is off set from "0", this off set frequency is
remained in the memory of the CPU. Thus the actual operating frequency has a difference caused
by such off set. (Maximum possible difference is 900Hz.)
іп the FM mode, when the TS switch is pushed IN, the decimal point of the 1KHz digit is turned
ON and the click stops of the tuning knob change in 1KHz steps.
VFO/MEMORY SWITCH and VFO GANG SWITCH
The CPU in the IC-260A/E contains two "МЕО"5"" for both receiving and transmitting. The VFO's
are labeled "A" VFO and "B" VFO and are selectable with the VFO/MEMORY Switch, and can
be selected to follow each other or operate independently with the VFO GANG Switch. This dual
VFO system gives the IC-260A/E many very convenient features. Please read this section very
carefully and perform the operation several times until you are comfortable with the system. Try
the example!
1. "A" VFO is for both transmitting and receiving and is selected by placing the VFO/MEMORY
Switch in the "A" position. The transmit and receive frequency will be controlled by "А"
VFO, displayed on the frequency display and stored in "А" memory.
2. "B" VFO is for both transmitting and receiving and is selected by placing the VFO/MEMORY
Switch in the "B" position. The transmit and receive frequency will be controlled by "В"
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