Vertex Standard FT-2000 ユーザーズマニュアル
Page 69
FT-2000 O
PERATING
M
ANUAL
E
NHANCING
T
RANSMIT
S
IGNAL
Q
UALITY
[PROC] Button
[MIC] Knob
[RF PWR] Knob
[RF PWR] Knob
[MONI] Button
[METER] Switch
[MONI] Knob
[PROC] Knob
[PROC] Knob
U
SING
THE
S
PEECH
P
ROCESSOR (SSB/AM M
ODES
)
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.
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.
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.
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 “
” icon will turn off, con-
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.
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 [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.
pression level adjustments by viewing the wave-form
on the “Oscilloscope” page.