39
Enhancing Transmit Signal Quality
FT-891 Advance Manual
Parametric Microphone Equalizer (SSB/AM mode)
The FT-891 includes a unique Three-Band Parametric Microphone Equalizer that
provides precise, independent control over the low, mid and treble ranges in the voice
waveform. You may utilize one group of settings when the speech processor is off and
use an alternate group of settings when the speech processor is on.
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The Parametric Equalizer is a unique technique for adjusting the signal quality. The
three audio ranges may be adjusted so precisely, it is possible to craft an audio response
that provides a natural and pleasant sound that you may not have ever experienced
before. Alternately, the effective “talk power” can be significantly enhanced.
The configuration aspects that may be adjusted on the Parametric Equalizer are:
Center Frequency:
The center frequency of each of the three bands may be
adjusted.
Gain:
The amount of enhancement (or suppression) within each band
may be adjusted.
Q:
The bandwidth over which the equalization is applied may be
adjusted.
Setup of the Parametric Microphone Equalizer
1. Set the RF output power to minimum value.
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We recommend that you connect a dummy load to one of the Antenna jacks, and
monitor your signal on a separate receiver, to prevent interference to other users.
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You will have the best chance of hearing the effects of adjustments if you wear
headphones (connected to the separate monitor receiver) while listening to your
transmitted signal.
2. To adjust the Parametric Microphone Equalizer while the speech processor is dis-
abled, set the speech processor to “OFF” (see page 38).
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To adjust the Parametric Microphone Equalizer while the speech processor is en-
gaged, set the speech processor to “ON” (see page 38).
3. Set the MONITOR function to “ON”, if you want to listen on the FT-891 internal monitor
4. Press and hold in the [
F
] key for one second
to activate the Menu mode.
5. Rotate the
MULTI
function knob to find the
“EQ” Menu settings containing Menu items
“
15-01
” through “
15-09
”; these parameters
pertain to the adjustment of the Paramet-
ric Microphone Equalizer when the speech
processor is disabled. Menu items “
15-10
”
through “
15-18
” pertain to the adjustment of
the Parametric Microphone Equalizer when
the speech processor is engaged.
6. Press the
MULTI
function knob, and then rotate it to adjust a particular Menu item.
7. Press and hold the PTT switch, and speak into the microphone while listening to the
