Yaesu FT-1000MP Operating Manual page 39

Operation
Activate the monitor by pressing the orange
MONI button (below the AF GAIN control) so that its
green LED lights, and adjust the LEVEL control
beneath the meter for comfortable volume while
transmitting. Audio feedback of your signal from
the loudspeaker to the microphone may occur if
the LEVEL control is not properly set, you may
want to use the monitor with headphones; if so
you should plug them in now if you have them.
Microphone Tone Selection
Before setting up the speech
processor, set the selector switch
on the rear of the MH-31B8 mi-
crophone (supplied) for the desired tone charac-
teristic. The higher numbered setting suppresses
low frequencies.
RF Speech Processor
Once the proper MIC control setting has been
determined, you can activate the RF speech proc-
essor to increase the average power of your
transmitted signal.
(First set the METER selector to the ALC (Auto-
matic Level Control) position, and ensure the
level is within the red zone while speaking into
the microphone.
Next set the METER selector to the COMP
(speech processor compression) position, and
press the PROC button (at the left end of the
row of buttons along the bottom) so that its
orange LED lights.
Now while speaking into the microphone, ad-
just the PROC control for a compression level of
5 to 10 dB on the COMP scale of the meter (the
second scale from the bottom). If you have the
monitor activated, you will be able to hear the
effect of the compression on your signal. In any
case, we do not recommend higher compres-
sion settings, as your signal will become less
readable.
J Finally, move the METER selector back to the
ALC position, and (without touching the MIC
control setting) adjust the RF PWR control so
that the meter reads in the upper end of the red
ALC scale on voice peaks.
ts Remember -With the speech processor on,
the RF PWR control now functions as a drive level
control for ALC adjustment, and is no longer used
for carrier output power adjustments.
VOX (Voice-Actuated T/R Switching)
VOX operation allows you to activate the trans-
mitter in any voice mode merely by speaking into
the microphone, without having to press the PTT
switch.
For the VOX circuit to operate properly, three
controls in the top access panel must be set to
match your microphone and the acoustic environ-
ment of your station. Once set, these controls
should not require readjustment unless you
change your microphone or station location.
(located on the ALC Unit beneath
the top cover access panel)
[A-VOX] [DLAY] [Vox |
3
3
S
VR6806
VR6805
Controls for VOX Operation
First make sure the receiver is set for normal
volume on a clear channel, and preset the vox
(gain) control in the top access panel fully coun-
terclockwise. Also preset the A-VOx (anti-vox)
and DLAY (vox delay) controls in the top access
panel to their 12 o'clock positions.
Set the RF PWR control fully CCW (to avoid
creating interference while you set up the VOX
controls). Now press the VOX switch near the
upper left corner of the front panel.
O Without pressing the PTT switch, speak con-
tinuously into the microphone while slowly ad-
vancing the vox control (in the top access
panel) clockwise, just until your voice activates
the transmitter.
ONow speak intermittently into the microphone,
and note the "hang time" between the moment
you stop speaking and when the receiver is
reactivated. This period should be just long
enough so that the transmitter remains keyed
between words, but drops back to receive dur-
ing pauses. Adjust the DLAY control, if neces-
sary, for comfortable hang time.
The A-VOX control probably needs no adjust-
ment, but if you find that, with the microphone in
its normal operating position, receiver audio from
the loudspeaker trips the transmitter, advance the
A-VOX control more clockwise. On the other hand,
if transmitter keying with the VOX keying seems
sluggish or unstable when you speak into the
microphone, try a more counter-clockwise setting.
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