Using The Speech Processor - Yaesu FT-2000D Operating Manual

E
NHANCING
U
SING THE
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 ("134 tAUd PE1 FRQ," "137
tAUd PE2 FRQ," "140 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. Press the [ PROC ] button repeatedly until the "
and " " icons will appear on the display, indicat-
ing the Speech Processor is engaged.
3. Rotate the [ METER ] switch fully to the left, so as to
select "COM" (Compression). Confirm that the com-
pression level is within the 5 dB to 10 dB range.
It is recommended that you utilize the monitor function
and adjust the [ PROC ] knob between 9:00 to 12:00 o'clock
position.
A :
DVICE
The Sub band (VFO-B) frequency display will show the
relative compression level of the Speech Processor for 3
seconds whenever the [ PROC ] knob is turned.
You may disable this feature (displaying the relative the
compression level) via Menu item "015 diSP LVL IND."
See page 117 for details.
To switch the Speech Processor off, press the [ PROC ]
button once more. The "
turn off, confirming that the Speech processor is turned
off.
Page 72
T
RANSMIT
S P
ROCESSOR ( SSB/AM/FM M
PEECH
"
" and " " icons will
S Q
IGNAL UALITY
[ MONI ] Button
[ PROC ] Button
[ METER ] Switch
[ MIC ] Knob [ MONI ] Knob
[ RF PWR ] Knob [ PROC ] Knob
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.
You may adjust the Parametric Microphone Equalizer
when the speech processor is engaged, using Menu
items "134" through "142." 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.
FT-2000D O
)
ODES
M
PERATING ANUAL