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Yaesu ft-897D Manual

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Page 31FT-897D OPERATING MANUAL
SSB/AM TRANSMISSION
TRANSMITTER OPERATION
DSP Microphone Equalizer
In the SSB, AM, and FM transmission modes, you may use
the DSP system to change the frequency response of the
audio stage. This will allow you to roll off excessive high-
and/or low-frequency components of your voice’s audio char-
acteristics.
To set up the DSP Microphone Equalizer feature:
1. Press and hold in the
[
DSP
]
key for one second. This
instantly activates Menu Mode No-048
[
DSP MIC EQ
]
.
2. Rotate the DIAL to select one of the following equaliza-
tion choices:
OFF: Microphone Equalization Off
LPF: High Cut (lower frequencies are emphasized)
HPF: Low Cut (higher frequencies are emphasized)
BOTH: High/Low Cut (mid-range frequencies are em-
phasized)
3. When you have made your selection, Press and hold in
the
[
F
]
key for one second to save the new setting and
exit to normal operation.
AF Speech Processor Operation
The AF Speech Processor increases your average power
output while operating on SSB and AM modes.
1. Press the
[
F
]
key, as necessary,
to recall Multi Function Row “c”
[
STO, RCL, PROC
]
.
2. Press the
[
C
](
PROC
)
key to acti-
vate the AF Speech Processor. “Parentheses” will ap-
pear on both sides of the “PROC” indication.
3. Now press the PTT key (unless you have VOX enabled),
and speak into the microphone in a normal voice level,
as usual.
4. To deactivate the AF Speech Processor, again press the
[
C
](
PROC
)
key.
5. The Compression Level may be adjusted via the Menu,
as follows:
• While still in Operating Function “c”
[
STO, RCL,
PROC
]
, press and hold in the
[
C
](
PROC
)
key for one
second. This instantly recalls Menu Mode No-074
[
PROC LEVEL
]
.
• Rotate the DIAL to set a new level of Compression
(the default value is “50”).
• When you have made your selection, press and hold
the
[
F
]
key for one second to save your new setting
and return to normal operation.
• Make some on-the-air checks, or use a monitor re-
ceiver in your station, to ensure that good voice qual-
ity has been obtained via your adjustment.
Excessive advancement of the Compression
Level may lead to distortion. Each operator’s
voice pattern is different, so try several settings
to find the one which is best for your voice.
… 33 …


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