Yaesu FTDX5000 CAT BOOK, Operating Manual

Page: 78 / 148

Page 76 FT
DX
5000 O
PERATING
M
ANUAL
E
NHANCING
T
RANSMIT
S
IGNAL
Q
UALITY
U
SING THE
S
PEECH
P
ROCESSOR
(
SSB M
ODE
)
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 70.
2. Press the [ PROC
] button repeatedly until the “
”
and “ ” icons appear in the display, confirming
that the Speech Processor is engaged.
A
DVICE
:
A blinking “ ” icon indicates the Parametric
Microphone Equalizer menu settings have all been set
to “OFF” (“
160 TAUD PE1 FRQ ”, “ 163 TAUD PE2
FRQ ”, and “ 166 TAUD PE3 FRQ ”).
3. Set the [ PROC
] knob between the 9:00 to 12:00
o’clock position.
A
DVICE
:
The relative compression level of the Speech Proces-
sor will show for 3 seconds in the lower right corner of
the Main Display whenever the outer [
PROC
] knob is
turned.
Alternately, the 3-second display feature may be
changed to show in the
SUB DISPLAY-
III
window
via Menu item “ 018 DISP INDI ”. Additionally, you
may disable the 3-second display feature via Menu item
“
017 DISP LVL IND ” See page 122 for details.
4. Rotate the [ METER
] switch fully to the left, 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.
A
DVICE
:
We recommend that you set the [
PROC
] knob between
9:00 to 12:00 o’clock position as described previously.
5. To switch the Speech Processor off, press the [ PROC
]
button repeatedly until the “ ” and “ ”
icons disappear.
[METER] Switch
[MONI] Button
[MONI] Knob
[PROC] Knob
[MIC] Button
[PROC] Button
A
DVICE
:
ˆ Excessive advancement of the [ PROC
] knob will re-
sult in a degradation of the transmitted signal-to-noise
ratio, thereby reducing intelligibility at the other end
of the circuit.
ˆ The Transmit Monitor provides a helpful way of veri-
fying proper adjustment of the compression level.
Pressing the [
MONI
] button then adjusting the [
MONI
]
knob for a comfortable listening level while you are
transmitting, allows you to hear the difference in sound
quality as you make adjustments.
ˆ The [ RF PWR
] knob still controls the RF power out-
put, whether or not the Speech Processor is engaged.
ˆ 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.