Page 72 FT-2000D OPERATING MANUAL
ENHANCING TRANSMIT SIGNAL QUALITY
USING THE SPEECH PROCESSOR
(
SSB/AM/FM MODES
)
The FT-2000D’s Speech Processor is designed to increase “talk power” by increasing the average power output, (via a
sophisticated compression technique) and adjusting the audio quality to the menu settings (“132 tAUd PE1 FRQ,” “135
tAUd PE2 FRQ,” “138 tAUd PE3 FRQ”). 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 repeatedly until the “ ”
and “ ” icons will appear on the display, indicat-
ing 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 “ ” and “ ” icons
will turn off, confirming that the Speech processor is
turned off.
ADVICE:
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.
You may adjust the Parametric Microphone Equalizer
when the speech processor is engaged, using Menu
items “132” through “140.” See page 70 for details.
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.
[
PROC
]
Button
[
MIC
]
Knob
[
RF PWR
]
Knob
[
MONI
]
Button
[
METER
]
Switch
[
MONI
]
Knob
[
PROC
]
Knob
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