Yaesu FT-1000MP Operating Manual page 6

(7)
MIC
This 8-pin jack accepts the M D - 1 0 0 ~ 8 ~ or MH-
31
88
Scanning I-land Microphone. MlC connector
pinout is shown on page 4. Proper microphone
input impedance is 500
-
600
Q.
(8) AF GAIN
MAlN
-@
SUB
The inner
MAIN
gain control adjusts the audio
volume of the MAlN receiver VFO in the speaker
or headphones.
The outer
SUB
gain control adjusts the audio
volume of the SUB receiver VFO in the speaker
or headphones.
Both controls can be rotated to adjust the rela-
tive balance of receiver audio between the two
receiver channels during dblal reception.
(9)
RF PWR
This adjusts transmitter output power in all
modes. The adjustment range is from approxi-
mately 5
-
100 watts, except in AM mode, where
it is about 5
-
25 watts.This controls the carrier
level for CW and AM transmission. Also, when the
speech processor is used in the SSB modes, this
control sets the processor level. In each case, the
ALC function sf the meter should always be se-
lected when setting this control, to avoid overdriv-
ing the transmitter final amplifier.
(10)
PROC
This button enables the RF speech processor
for SSB transmission. Processing level is set by
the outer control with the same name. While acti-
vated, the LED in this button glows green.
This orange button enables the transmit (RF)
monitor in all modes (except CW, in which the
monitor function is always on, to produce the
sidetone). While activated, the LED in this button
glows green.
(12)
RF GAlN
The
RF
gain control adjusts the receiver signal
level in front of the main receiver 1st mixer (via
PIN diodes), and also the gain of the main re-
ceiver IF amplifiers.
It is normally set fully clockwise for maximum
sensitivity. When rotated CCW, the S-meter mini-
mum deflection point will move up the scale. The
peak deflection for a particular signal will remain
the same if it is greater than the level set by this
control, but the main receiver will be insensitive to
weaker signals.
This control also affects the
SQL
setting for
main VFO-A, and should be preset fully clockwise
when setting the squelch threshold for the VFO or
on a recalled memory.
When activated by the
MQNl
button (above),
the audio level of the transmit RF monitor during
transmission (relative to the
AF GAlN
control) is
adjusted by this control.
This control sets the signal level threshold at
which main VFO-A receiver audio is muted (and
the green
MAIN BUSY
display indicator turns off),
'
in all modes. This control is normally kept fully
CCW, except when scanning and during FM op-
eration.
\
(1
5)
METER
Selector Switches
These determine the function of the multifunc-
tion meter during transmission. The meanings of
the abbreviations are as follows:
ICISWR
-
Final amplifier collector current (Amps)
and Standing Wave Ratio (f0rward:reflected).
ALGICOMP
-
relative Automatic Level Control volt-
age and RF speech compressor level (in dB, for
SSB modes only).
VCCfMIC
-
Final amplifier collector voltage and
microhone gain input level.
The meter indicates power output and the se-
lected parameter during transmission, and signal
strength in S-units during reception (on the main
receiver). Each S-unit is approximately 6 dB.
This inserts 6, 12, or
6
8 dB (1, 2, or 3 S-units)
of attenuation before the mixer to suppress band
noise and possible overload from very strong sig-
nals.
Press this to set optimum receiver front end
characteristics for strong signals. This bypasses
the front end RF amplifier and feeds the received
signals directly to the first mixer.
R
(1 8) ANT
NB RX
N B
-
pressing this selects either the
ANTA
or
B
jack on the rear panel, and allows convenient
antenna switching at the press of a button. The
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