16
SKY-SDR USER MANUAL Ver. 1.3.1 - 28-MAR-2017
•
Select filter “F4”
•
Press
[F]
, then press “Filter”
•
Press
[RIT]
to toggle between
Lo- and Hi- adjustments
–
Use
VFO knob to adjust frequency.
•
Set Lo-Freq. to 600 Hz ; Set Hi-
Freq. to 2.4 kHz
•
Passband Center is: 2400 Hz
minus 600 Hz = 1500 Hz
Digital Modes:
Most DIGI modes are
operated in DIGI Mode with a fixed
filter bandwidth of 3.35 kHz. For RTTY,
use USB Mode.
OTHER DSP OPTIONS
Noise REDUCTION <NR>:
The NR is
used to help reduce the level of
received broadband noise. It is
engaged by pressing
[F]
and then
pressing the
[UP/NR]
button. The NR
should be left OFF unless absolutely
necessary, as it will slightly distort
received audio when ON.
The level of noise reduction of the NR
may be adjusted in the software
menu
item #2
, with a range of 1 to 100. 1 is
minimum and 100 is maximum. You
should only use as high of level as
deemed necessary. This helps keep
audio distortion to a minimum. To
deactivate the NR, press
[F]
and
[UP/NR]
again.
NOISE BLANKER <NB>:
The NB is
useful for reducing the level of short
pulse noise, such as static crashes or
pulses generated from an electric
fence. It is engaged by pressing
[F]
and then pressing the
[DOWN/NB]
button. The level of blanking can be
adjusted in the Software
Menu item
#10
, with levels ranging from 4 to 12.
In this case, 4 is maximum blanking
and 12 is minimum blanking. Always
set this level as high as possible while
still achieving the necessary blanking.
To deactivate the NB, press
[F]
and
[DOWN/NB]
again.
NOTCH FILTER <NF>:
The NF
(“ACE”)
is used for eliminating
carriers/heterodynes while operating
in SSB mode (only). It does not work
in any other mode. It is activated by
first pressing the
[F]
button and then
pressing the
[MODE]
button. To
deactivate NF, press
[F]
and
[MODE]
again.
RECEIVER SENSITIVITY
There are 3 levels of sensitivity:
NORMAL; ATTENUATION; and PRE-
AMPLIFIER.
Toggle through these 3
levels by pressing the
[PRE/ATT]
button. The level selected is shown in
the bottom line of the display as: “AMP”
for P
reamp; “ATTN” for Attenuator; or
blank (nothing shown) when in
“NORMAL” mode.
AGC TIMING:
The attack and
recovery time of the AGC is set in
the Software
Menu Item #9
. The
range is from 1 (slowest) to 20
(fastest). Use slower speeds for
SSB and faster speeds for CW and
digital modes.
S-METER OPTIONS
The S-Meter is only accurate
when the Pre-
Amp is “ON”.
The
signal strength of the received
station may be displayed in S-Units
