User's Manual

Page 76 FTDX5000 OPERATING MANUAL
ENHANCING TRANSMIT SIGNAL QUALITY
USING THE SPEECH PROCESSOR
(
SSB/AM MODES
)
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
??.
2. Press the
[
PROC
]
button repeatedly until the “
”
and “
” icons appear in the display, confirming
that the Speech Processor is engaged.
ADVICE:
A blinking “ ” icon indicates the Parametric
Microphone Equalizer menu setting have all been set
to “OFF” (“154 TAUD PE1 FRQ”, “157 TAUD PE2
FRQ”, and “160 TAUD PE3 FRQ”).
3. Adjust the
[
PROC
]
knob between 9:00 to 12:00
o’clock position.
ADVICE:
The SUB DISPLAYs will show the relative compres-
sion level of the Speech Processor for 3 seconds when-
ever the
[
PROC
]
knob is turned.
You may disable this feature (displaying the relative
compression level) via Menu item “015 DISP LVL
IND”. See page
??? for details.
4. Rotate the
[
METER
]
switch fully to the left, so as to
select “COMP” (Compression).
5. Press the PTT switch on the microphone, and speak
into the microphone in a normal voice level. Confirm
that the compression level is within the 5 dB to 10 dB
range.
ADVICE:
We recommend that adjust the
[
PROC
]
knob between
9:00 to 12:00 o’clock position as described previously.
5. To switch the Speech Procesor off, press the
[
PROC
]
button repeatedly until the “
” and “ ”
icons disappears.
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.
 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.
[
METER
]
Switch
[
MONI
]
Button
[
MONI
]
Knob
[
PROC
]
Knob
[
MIC
]
Button
[
PROC
]
Button