Kenwood TS-950SDX Instruction Manual page 48
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Also See for TS-950SDX:
- Service manual (349 pages) ,
- Instruction manual (65 pages) ,
- In-depth manual (35 pages)
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4-10.
VOICE SYNTHESIZER
(Requires
the
use
of the
optional
VS-2
Voice
Synthesizer)
When the VOICE switch is pressed the transceiver
will audibly announce the operating frequency.
4-11.
DIGITAL MODULATION
FUNCTION
SSB, CW, AM FM and FSK transmit processing and
receive
processing
in SSB,
CW,
and
FSK
are
, accomplished with 16-bit A/D and D/A convertors
and DSP (Digital Signal Processor).
(1) Features of each Mode
D SSB mode
Superior sideband suppression and higher quality
modulation through the use of tenth digital phase
shift networks digital filtering.
@ CW mode
Excellent wave
shaping
and
narrow
bandwidth
using ROM filter with Gaussian characteristics .
@
AM mode
Low-distortion modulated with superb amplitude
and
group
delay
characteristics
is obtained
through digital modulation and 84th FIR filtering.
@
FM mode
The DSP unit provides a high-quality
455 kHz
carrier
in the
FM
mode.
Modulation
is not
processed in the DSP unit.
©
FSK mode
Low-distortion wave obtained by continuous phase
modulation
by the DDS generator and excellent
waveform
shaping
for
high
speed
conversion
through the use
of an FIR filter with Gaussian
characteristics.
(2) Setting
Five menu selections in section 4-2-12 allow you
to adjust the filtering and CW rise/decay time of
the DSP unit to your preference.
MENU section
1. Set the MENU key to ON.
2. Select
a
menu
number
(18-22)
with
the
M.CH/VFO CH control.
3. Use
the UP/DOWN
switches to set the filter
cut-off and CW rise/decay time.
4. Press the MENU
key again to exit menu mode.
Menu No.
Item
Settings
lz
ee
ae
j
18
DSPComb
|
ON/OFF
|
filter
BPF3/BPF2/BPF1/600/
Receive FIR | 800/1000/1400/1800/2
19
filter cut-off | 200/2400/2600/2800/3'
frequency
000/3200/3500/4000/4
500/6000
f
Transmit HPF
20
À
cut-off
OFF/100/200/300/400
|
;
frequency
:
Transmit LPF :
;
21
cut-off
2600/2750/2900/3100
frequency
CW rise /
22
decay time
| 2/4/6/8ms
(3) Menu Functions
1.
Menu No.18
Used to turn the DSP Comb Filter ON and OFF tor
SSB reception.
2.
Menu No.19
Select the cut-off frequency for the DSP BPF
and
LPF during receive.
3.
Menu No.20
Select the transmit high pass filter cut-off frequency.
4,
Menu No.21
Select the transmit low pass filter cut-off frequency.
5.
Menu No.22
Select the rise/decay time for CW. The 4ms setting
is desirable
for
low
speed
keying
with
normal
weighting
(dot
/ dash
ratio). The
2 ms
setting
is
desirable for high speed keying or when
operating
with unusual dot/dash ratio.
a: rise time
|
T
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