Yaesu FT-2980E, Руководство по эксплуатации, Страница: 22 / 80

Channel Step Selection
Tuning steps are factory preset to default increments which are appropriate for the
country to which this radio is exported. You may have a reason to use a different step
size, however, and here is the procedure for changing the channel steps:
1. Press and hold in the [
MHz
(
SET
)] key for one second,
then rotate the DIAL knob to select “
50 STEP
”.
2. Press the [
MHz
(
SET
)] key, then rotate the
DIAL
knob to
select the desired step size (
5
/
10
/
12.5
/
15
/
20
/
25
/
50
/
100
kHz).
3. Press and hold in the [ MHz
(
SET
)] key for one second to
save your new setting and exit to normal operation.
Display Brightness
The FT-2980R/E display illumination has been specially engineered to provide high
visibility with minimal disruption of your “night vision” while you are driving. The brightness
of the display is manually adjustable, using the following procedure:
1. Press and hold in the [
MHz
(
SET
)] key for one second,
then rotate the
DIAL
knob to select “
16 DIMMER
”.
2. Press the [ MHz
(
SET
)] key, then rotate the
DIAL knob to
select a comfortable brightness level (
LVL 0
-
LVL10
).
3. Press and hold in the [ MHz
(
SET
)] key for one second to
save your new setting and exit to normal operation.
RF Squelch
A special RF Squelch feature is provided on this radio. This feature allows you to set the
squelch so that only signals exceeding a certain S-meter level will open the squelch.
To set up the RF squelch circuit for operation, use the following procedure:
1. Press and hold in the [
MHz
(
SET
)] key for one second,
then rotate the DIAL knob to select “
42 RF SQL
”.
2. Press the [ MHz
(
SET
)] key, then rotate the
DIAL knob to
select the desired signal strength level for the squelch
threshold (
S1
-
S9
or
OFF
).
3. Press and hold in the [ MHz
(
SET
)] key for one second to
save your new setting and exit to normal operation.
The receiver’s squelch will open based on the highest level set by the two
squelch systems, “Noise Squelch” and “RF Squelch”. For example:
1) If the Noise Squelch (SQL control) is set so that signals at a level of S-3 will
open the squelch, but the RF Squelch (Menu #42) is set to “S-9”, the squelch
will only open on signals which are S-9 or stronger on the S-meter.
2) If the RF Squelch is set to “S-3”, but the Noise Squelch is set to a high level
which will only pass signals which are Full Scale on the S-meter, the squelch
will only open on signals which are Full Scale on the S-meter. In this case, the
Noise Squelch overrides the action of the RF Squelch.
18
Advanced Operation
FT-2980R/E Operating Manual