Rf Gain And Squelch; Simple Band Scope - Icom IC-706MKIIG Instruction Manual

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The IC-706MKIIG uses the same control, [RF/SQL],
to adjust one of either the RF gain or the squelch.
[RF/SQL] adjusts either the RF gain or the squelch
depending on the operating mode selected and the
condition of the RF gain item in initial set mode (p. 51;
also see the table at right).
The RF (Radio Frequency) gain is used to adjust the
receiver gain.
• This control should be set to the 11 o'clock position for
normal use.
• Shallow rotation moves the S-meter to the right indicating
the signal strength which can be received.
The SQUELCH removes noise output from the
speaker (closed condition) when no signal is
received. The squelch is particularly effective for FM.
It is also available for the other modes.
• When operating in FM, first rotate the control fully coun-
terclockwise. Then, rotate the control clockwise to the
point where the noise just disappears. This is the best
position. The squelch does not open for weak signals
when it is set too deep.
• A segment appears in the S-meter to indicate the S-meter
squelch level.
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This function allows you to visually "sweep" an area
surrounding the set frequency for other signals.
Detected signals are indicated graphically in the dot
matrix section of the display.
➀
Set a mode and frequency.
➁
Select .
• Push [DISPLAY] 1 or 2 times if
• Push [MENU] one or more times to select
➂
Push [F-1] one or more times to select the desired
steps.
•Each dot corresponds to a step for the indicated fre-
quency.
•0.5, 1, 2, 5, 10, 20 and 100 kHz can be set for the scope
step.
➃
Push [F-3] to start the sweep.
• " " (below ) flashes while sweeping.
• The receive audio is muted while sweeping.
➄
Rotate the main dial if you want to monitor the dis-
played signals.
•The sweep marker indicates the location of the dis-
played frequency in the sweep readout.
•If the displayed frequency is outside of the sweep read-
out (determined by the sweep width), the sweep marker
flashes.
➅
Push [F-2] to return the frequency to the start of a
sweep.
• The sweep marker moves back to the center position.
*
position for RF gain is the
11 o'clock position since
this sets RF gain to the
max.
When set to AUTO, SQL is
active in FM/WFM/AM; RF
is active in SSB/CW/RTTY.
using the band scope on a band containing a lot of noise.
or appears.
.
RECEIVE AND TRANSMIT
Initial set mode USB, LSB,
setting CW, RTTY
1
SQL
SQL*
AUTO RF GAIN
2 RF/SQL
RF • SQL*
1 2
Default; * Default for USA version.
The recommended
Noise squelch
threshold point
Squelch
opens
Use the attenuator or turn OFF the preamp when
sweep marker
4
AM, FM, WFM
SQL
SQL
RF/SQL
Max. RF gain position
AF RF/SQL
RF gain Same effect as at
decreases the center position
S-meter squelch
threshold point
AF RF/SQL
Deep
Select sweep width
([F-1])
Start sweep
([F-3])
Sweep is finished
([F-3] again)
Move sweep marker
(main dial)
Returns to previous
frequency ([F-2])
22