Yaesu FT-1000MP Operating Manual page 39

Operation
Activate the monitor by pressing the orange
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
"re
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-31~8 mi-
crophone (supplied) for the desired tone charac-
teris"ric. The higher numbered setting suppresses
low frequencies.
RF Speech Processor
,t
Once the proper
MIC
control setting has been
3
determined, you can activate the RF speech proc-
3
esssr to increase the average power of your
J
transmitted signal.
CB First set the
METER
selector to the
ALC
(Auto-
lr
matic Level Control) position, and ensure the
level is within the red zone while speaking into
e
the microphone.
U
Next set the
METER
selector to the
COMP
)t
(speech processor compression) position, and
i
-
press the
PROC
button (at the left end of the
d
row of buttons along the bottom) so that its
,f
orange LED lights.
O 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.
Finally, move the
METER
selector back to the
r
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.
7
L@?
Remember -With the speech processor on,
the W F
PWR
control now functions as a drive level
control for ALC adjustment, and is no longer used
for carrier output power adjustments.
VOX (Voice-Actua ted 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)
Controls for VOX Operation
O 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 - v o x
(anti-vox)
and
DLN
(vox delay) controls in the top access
panel to their 12 o'clock positions.
O 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.
O Now 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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