Enhancing Transmit Signal Quality; Using The Speech Processor - Yaesu FT-2000 Operating Manual

E
NHANCING
U
The Speech Processor is designed to increase "talk power" by increasing the average power output via a sophisticated
compression technique. The result is improved intelligibility when conditions are difficult.
1. Adjust the [ MIC ] (gain) knob for SSB use, as described
on page 64.
2. Rotate the [ METER ] switch fully to the left, so as to
select "COMP" (Compression).
3. Press the [ PROC ] button momentarily. The "
icon will appear in the display, confirming that the
Speech Processor is engaged.
4. Press the PTT switch on the microphone, and speak
into the microphone in a normal voice level. Observe
the deflection of the meter needle on the COMP meter
scale.
5. Rotate the [ PROC ] knob so that the meter needle de-
flects to not more than "10 dB" on the COMP scale.
6. To switch the Speech Processor off, press the [ PROC ]
button once more. The "
firming that the Speech processor is turned off.
A :
DVICE
Excessive advancement of the [ PROC ] knob will re-
sult in a degradation of the transmitted signal's signal-
to-noise ratio, thereby reducing intelligibility at the
other end of the circuit.
The Transmit Monitor is very helpful way of verifying
proper adjustment of the compression level. Pressing
the [ MONI ] button then adjusting the [ MONI ] knob
for a comfortable listening level while you are trans-
mitting, you will be able to hear the difference in sound
quality as you make adjustments.
The [ RF PWR ] knob still controls the RF power out-
put, whether or not the Speech Processor is engaged.
When the optional DMU-2000 Data Management Unit
is connected, you may observe the effect of your com-
pression level adjustments by viewing the wave-form
on the "Oscilloscope" page.
FT-2000 O
PERATING
T
RANSMIT
S
SING THE PEECH
" icon will turn off, con-
M
ANUAL
S
IGNAL
P
ROCESSOR ( SSB/AM M
[ MONI ] Button
[ PROC ] Button
"
[ METER ] Switch
[ MIC ] Knob [ MONI ] Knob
[ RF PWR ] Knob [ PROC ] Knob
Q
UALITY
)
ODES
Page 69