Adjusting The Rf Gain And Squelch; Setting The Operating Frequency - Yaesu FT-857D Operating Manual

O
PERATION
A
DJUSTING THE
The SQL/RF Gain control is configured differently,
depending on the country to which the FT-857 has been
exported. In the U.S. version, the default function of
this control is "RF Gain." The configuration of the
SQL/RF Gain control is set via Menu Mode No-080
[ SQL/RF GAIN ] ; see page 110 for details.
If your transceiver is configured for "RF Gain" use, rotating this control fully clockwise in
the SSB/CW/Digital modes will provide best sensitivity. To reduce the receiver's RF Gain
somewhat, rotate this control counter-clockwise slightly. You will observe an increasing
number of bars on the S-meter as you rotate the RF Gain control counter-clockwise; this
indicates increasing AGC voltage, which is causing the front-end gain to be reduced. In the
FM and Packet modes, this control will automatically be set to "Squelch," even though the
setting of Menu Mode No-080 [ SQL/RF GAIN ] is "RF Gain."
If this control is configured for "SQL" operation, the FT-857's RF Gain will be set for
maximum sensitivity in all modes, and the SQL/RF Gain control will function solely as a
Squelch control. In this case, rotate the SQL/RF Gain control to the point where the back-
ground noise is just silenced; this will provide the best sensitivity to weak signals, while
keeping the receiver quiet when no signal is received. The LED just above the Main DIAL
will glow Green when the squelch is opened by an incoming signal or noise.
S
ETTING THE
1. In the "SSB/CW/DIG" modes, rotate the DIAL knob to set the frequency. Clockwise
rotation of the DIAL increases the operating fre-
quency.
2. In the "AM/FM/PKT" modes, rotate the SELECT
knob to set the frequency. Clockwise rotation of
the SELECT knob increases the operating fre-
quency.
3. You may also use the SELECT knob to adjust the operating frequency in the "SSB/CW/
DIG" modes. The SELECT knob provides faster tuning, ideal for making quick changes
in frequency when you want to move across the band in a hurry. You can then use the
DIAL knob to make fine frequency adjustments.
The synthesizer steps for the SELECT knob may be adjusted independently by mode. Use
Menu Mode No-006 [ AM STEP ] for AM, No-052 [ FM STEP ] for FM, and No-082 [ SSB
STEP ] for SSB/CW/DIG. See pages 97, 105, and 110 for details.
If you press the SELECT knob momentarily, then rotate the SELECT knob, you can now
36
RF G
AIN AND
SQL/RF
O F
PERATING
SELECT
S
QUELCH
REQUENCY
FT-857 Operating Manual
DIAL