Yaesu FTdx5000 Series Operating Manual page 40

The RF Gain controls provide manual adjustment of the gain levels for the receiver RF and IF stages, to account for noise
and/or signal strength conditions at the moment.
VFO-A Receiver's RF GAIN Adjustment
The ( VFO-A )[ RF GAIN ] knob should, initially, be ro-
tated to the fully clockwise position. This is the point of
maximum sensitivity, and counter-clockwise rotation will
gradually reduce the system gain.
( VFO-A )[ RF GAIN ] Knob
H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K H I J K
A :
DVICE
ˆ As the [ RF GAIN ] knob is rotated counterclockwise
to reduce the gain, the S-meter reading will rise. This
indicates that the AGC voltage being applied to the
receiver is increasing (which causes a reduction in re-
ceiver gain).
ˆ Rotating the [ RF GAIN ] knob control to the fully
counter-clockwise position will essentially disable the
receiver, as the gain will be greatly reduced. In this
case, as well, the S-meter will appear to be "pegged"
against the right edge of the analog S-meter scale.
ˆ The ( VFO-B )[ RF GAIN ] knob operates identically to
the ( VFO-A )[ RF GAIN ] knob. The effects of counter-
clockwise rotation of the VFO-B receiver's RF Gain
control may be observed visually on the VFO-B S-
meter.
FT 5000 O
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PERATING
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RF G
AIN ( SSB/CW/AM M
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ANUAL
ONVENIENCE
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ODES
VFO-B Receiver's RF GAIN Adjustment
The VFO-B receiver's RF Gain operates identically to the
VFO-A receiver's RF Gain.
ˆ Press the ( VFO-B )[ RX ] button to engage the Dual
Receive operation. The imbedded LED in the ( VFO-
B )[ RX ] button is glows green.
ˆ The fully clockwise position of the ( VFO-B )[ RF
GAIN ] knob should always be utilized as a starting
point for operation.
( VFO-B )[ RF GAIN ] Knob
Q P :
UICK OINT
ˆ Reception frequently can be optimized by rotating the
[ RF GAIN ] knob slightly counter-clockwise to the
point where the incoming noise level is just about the
same as the "stationary" meter needle position as set
by the adjustment of the [ RF GAIN ] knob. This set-
ting ensures that excessive gain is not being utilized,
without so much gain reduction that incoming signals
cannot be heard.
ˆ The RF GAIN control, along with the IPO and
ATT(enuator) features, all affect the system receiver
gain in different ways. As a first step in dealing with
high noise or a crowded, high-level signal environment,
the IPO generally should be the first feature engaged,
if the frequency is low enough to allow the preampli-
fier to be bypassed. Thereafter, the RF GAIN and
ATT(enuator) features may be employed to provide
precise, delicate adjustment of the receiver gain so as
to optimize performance fully.
F
EATURES
( VFO-B )[ RX ] Button
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