User's Manual

AF Digital Signal Processing
DSP is also executed at the AF stage, offering Beat
Cancel and CW Auto Tune functions. It also enables you
to achieve remarkable noise reduction and apply custom
enhancements to your transmitted voice.
Beat Cancel
Automatic Beat Cancel, avail-
able for the main band (SSB
and AM modes), immediately
eliminates multiple beats
interfering with a desired signal.
It works well in combination
with IF Auto-Notch (SSB).
Manual Beat Cancel
A new Manual Beat Cancel
function, which operates as a
manual AF notch, can be used
in all modes — though it is
particularly effective in CW.
CW Auto Tune
You no longer have to adjust
the VFO while operating on
CW — CW Auto Tune does it
for you automatically by adjusting
the VFO to your preset pitch at the
touch of a button.
Noise Reduction
There are 2 types of noise reduction: LEM (NR1) and SPAC
(NR2). LEM (Line Enhancer Method) — available for all
modes on the main band and FM/AM on the sub band —
automatically forms a filter shape around the target signal
for a custom, dynamic noise reduction capability. The
degree of enhancement can also be set manually for main-
band use. The SPAC (Speech
Processing/Auto Correlation)
function utilizes a special sta-
tistical/correlation algorithm
to pull out weak signals that
are buried deep in noise.
Although available for all
modes on the main band, it’s
especially useful for tough CW
conditions. The correlation
time setting can be adjusted
in 10 steps between 2ms and
20ms.
TX Audio Shaping
You have 3 ways to tailor audio quality with DSP: the
TX/RX equalizer (SSB/FM/AM), TX filter bandwidth
(SSB/AM), and speech processor (SSB/FM/AM). The TX/RX
equalizer offers 4 frequency response settings on SSB, FM
and AM: high boost for improved clarity, formant pass to
minimize extraneous sounds, bass boost for stronger
sound, and conventional mode for an ‘analog’ sound. On
SSB and AM transmit you can choose between 6 TX filter
bandwidth settings according to your microphone and
operating requirements. The speech processor works
across three bands (SSB, FM and AM) for high
compression and minimal distortion.
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Frequency [Hz]
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
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-100 200 300 400 500-100-200-300-400-500
Attenuation [dB]
Target signal
Beat
Beat Beat
Canceled
Signal
Noise Noise
Formed filter
Signal
Noise Noise
Extract signal
from the noise
❚ Line Enhancer Method
❚ SPAC Method
HF Band
50MHz Band 440MHz Band
144MHz Band 1200MHz Band