Tx Audio Enhancement; Rx Audio Enhancement - Yaesu FT-1000MP Operating Manual

Operation
TX Audio Enhancement
-
Four microphone
selects low-, mid- and high-cut filters along with a
audio responses can be chosen using menu se-
band pass filter (see below).
lection 4-4. Since audio characteristics voice vary
between people, these settings enable tailoring
your transmitted audio for best clarity.
TX IF
Filter Selectisn
-
Normally, both 2.4 kHz
filters are selected in the transmit IF chain. How-
ever, with EDSP operation, you can select 6.0 kHz
filters for wider frequency response on transmit
audio. The effect of this filter selection is directly
related to menu selection 7-7 (below). The de-
sired filter is chosen with menu selection 5-9, and
is only active when EDSP is turned on.
EDSP Modulation and Demodulation
TX EDSP Modulation
-
Early-stage transmitted
SSB audio is applied directly to EDSP circuitry for
processing. EDSP filter parameters can be
matched to voice characteristics for optimum
audio tailoring and sound effect.
TX EDSP Demodulation
-
For SSB, CW and
AM, receiver 3rd IF output is applied directly to
EDSP circuitry for demodulation and processing.
Bypassing conventional filters and utilizing EDSP
digital filter offers optimized bandwidth and fre-
quency response.
Menu selection 7-7 configures the settings for
both Rx and Tx EDSP (see table below).
The low-, mid-, and high-cut filters are pre-set
for different audio emphasis. The bandpass filter,
however, is used for QRM rejection and can be
user-tailored for SSB, CW, AM and Digital opera-
,
tion. The lower and upper frequency cut-off of
each mode-respective BPF is adjusted by menu
selection 4-5, With the
CONTOUR
control set to the
BPF (
m)
position, the low- and high-cutoff
setttings for the bandpass filter are selected auto-
matically as you change modes. See the illustra-
tion below and the table at the top of the next page
for filter and cut-off ranges.
EDSP Modulation and Demodulation
Menu Selection 7-7
S S B
AM
Mode
SSB (Rx)
SSB (Tx)
CW (Rx)
AM (Rx)
Frequency (Hz)
RX Audio Enhancement
-
EDSP offers both
noise reduction and several user-configurable fil-
ter networks. Noise reduction is accomplished by
four settings selected by the front panel
NR
con-
trol. Each setting has correlation parameters opti-
C W
mized to reduce random noise, static, pulse1
RTTY
P
K T
man-made noise and heterodynes with little deg-
FAX
radation of the desired signal.
Settings
OFF
100-31 00 HZ
300-2800Hz
OFF
100-3100Hz
150-31 OOHZ
200-31 00 HZ
300-31 00 HZ
OFF
ON (1 00-31 00 HZ)
OFF
ON (70-3800 HZ)
QRM reduction is enhanced by various DSP
filter networks. The front panel
CONTOUR
control
BW
W
Frequency (Hz)
page 58