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Page 62 FT-950 OPERATING MANUAL
USING THE SPEECH PROCESSOR
(
SSB AND AM MODES
)
The FT-950s 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 (“100 TAUD PE1 FRQ”, “103
TAUD PE2 FRQ”, “106 TAUD PE3 FRQ”. The result is improved intelligibility when conditions are difficult.
1. Adjust the
[
MIC GAIN
]
knob, as described on page
56.
2. Press the
[
METER
]
button repeatedly to select
“COMP” (Compression) meter.
3. Press the
[
PROC
]
button repeatedly until the
” and “ ” icons appear in the display,
confirming that the Speech Processor is engaged.
ADVICE:
Blinking “ ” and “ ” icons indicate the
Parametric Microphone Equalizer menu settings have
all been set to “OFF” (“100 TAUD PE1 FRQ”, “103
TAUD PE2 FRQ”, “106 TAUD PE3 FRQ”).
4. 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:
You may set the RF power output via the Menu item
111 TGEN TX PWR”, whether or not the Speech Pro-
cessor is engaged.
You may adjust the Parametric Microphone Equalizer
when the speech processor is engaged, using Menu
Items “100” through “108”. See page 117 for de-
tails.
When the optional DMU-2000 Data Management Unit
is connected, you may observe the effect of your com-
pression level adjustments by viewing the waveform
on the “Oscilloscope” page.
Adjusting the compression level of the Speech Processor
You may adjust the compression level of the Speech Processor via the Menu Item “109 TGEN PROCLVL”.
ENHANCING TRANSMIT SIGNAL QUALITY
[
METER
]
Button
[
MIC GAIN
]
Knob
[
PROC
]
Button
1. Press the
[
METER
]
button repeatedly to select
“COMP” (Compression) meter.
2. Press the
[
MENU
]
button to engage the Menu.
3. Rotate the
[
SELECT
]
knob to select Menu item
109 TGEN PROCLVL”.
ADVICE:
Press the
[
SELECT
]
knob to toggle the Menu item
display between “109 TGEN” and “PROCLVL”.
4. Press the PTT switch on the microphone, and speak
into the microphone in a normal voice level. Ro-
tate the
[
CLAR/VFO-B
]
knob to level “50” ~
75”.
5. Press and hold in the
[
MENU
]
button for one sec-
ond to save the new setting and exit to normal op-
eration.
[
CLAR/VFO-B
]
Knob
[
MENU
]
Button
[
SELECT
]
Knob
[
METER
]
Button
5. 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 compression gain will result 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 a very helpful way to verify proper adjustment of the compression level. Pressing the
[
MONI
]
button and then adjusting the
[
MONI
]
knob for a comfortable listening level while you are transmitting,
you will be able to hear the difference in sound quality as you make adjustments.
64


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