Yaesu FT-991 Operating Manual page 68

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The FT-991 Speech Processor is designed to increase "talk power" by increasing the average power output (via a so-
phisticated compression technique) and adjusting the audio quality to the menu settings ("130 P-PRMTRC EQ1 FREQ",
"133 P-PRMTRC EQ2 FREQ", "136 P-PRMTRC EQ3 FREQ"). The result is improved intelligibility when conditions
are difficult.
1. Adjust [ MIC GAIN ] on the TFT display, as described
on page 59.
[ METER ] on the TFT display to select
2. Touch
"COMP" (Compression) meter.
button, then touch [ PROC ] to
3. Press the F(M-LIST)
display the PROC level (from 1 to 100), confirming
that the Speech Processor is engaged.
4. Press the PTT switch on the microphone, and speak
into the microphone in a normal voice level.
5. Adjust the MULT knob to set the compression level
within the 5 dB to 10 dB range.
6. To switch the Speech Processor off, touch [ PROC ]
on the TFT display once more.
pear in the display, confirming that the Speech pro-
cessor is turned off.
A :
dvice
 You may adjust the Parametric Microphone
izer when the speech processor is engaged, using
Menu Items "130" through "138". See page 136
for details.
Page 66
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ransMit
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Sing the peech
The "OFF" will ap-
Equal-
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( SSb M
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FT-991 O
ualitY
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ode
F(M-LIST) Button
MULTI Knob
M
peraTing anual