19
SKY-SDR USER MANUAL Ver. 1.3.1 - 28-MAR-2017
there is strong QRM from one side, you
will get better reception by switching to
the opposite mode. The CW Mode is
selected in the
Software Menu item
#8 (Reverse CW Key).
SIDETONE LEVEL
The sidetone level adjustment is a
mechanical adjustment. The level is
adjusted using a small screw driver
through a hole on the left side panel.
See “Side Panel Connections” (and
adjustments) on page 10.
The SKY-SDR
has several features for
CW Mode
.
In order to enable
transmitting in CW, you must select a
delay time in
Software Menu item #3
(CW VOX)
.
Default is “Disable
d
.” The
minimum delay is 100 ms. The
maximum is 5 seconds.
When using the radio with an external
amplifier, 100 ms is OK with many
newer amps. When using with amps
that have a slow open-frame T/R relay
(i.e. most Ameritron amplifiers), you
will need 200 or 300 ms to prevent the
amp’s slow T/R relay from trying to
follow the keying with every dit or dah.
CW-PITCH:
The CW Pitch control sets
the frequency of the center of the
bandpass of the filters; thus it defines
the frequency which will sound the
loudest when tuning across CW
stations. When you adjust the CW
Pitch, it automatically adjusts the
transmit offset frequency such that you
will be zero-beat with the other station
when you are listening to a tone with
the pitch you set.
EXAMPLE:
If you set the Pitch for 700
Hz and listen to a 700 Hz tone, you will
be zero beat. If you listen at 600 Hz,
you will be 100 Hz off frequency.
CW KEY SELECTION:
The SKY-SDR
will operate with a simple straight key,
external keyer, or using its own built-in
iambic keyer.
For operation with a
straight key
, wire
the 3.5mm Phone plug as shown on
page 10 on the left (KEY).
For operation with an
external keyer
,
connect the keying line using a 3.5mm
Phone plug wired just like the straight
key.
For operation with the
built-in iambic
keyer
, wire the paddle as shown on
page 10 on the left (PAD).
BUILT-IN IAMBIC KEYER:
The built-in keyer has several Software
Menu adjustments:
•
Iambic Mode
–
(
Software Menu
item #6)
. Toggles the built-in
keyer between Mode A and Mode
B.
In Mode A
when releasing the
paddle, the keyer completes the
element being sent.
In Mode B
the keyer sends an additional
element opposite to the one being
sent when the paddle was
released. Different users have
different preferences. If you are
not already familiar with Mode B,
you should select Mode A.
•
CW
[Keying]
Speed -
(
Software
Menu item #5)
. Adjusts keying
speed of the keyer between 5 and
50 wpm. The change takes place
after you exit the Menu Mode.
•
Weight
–
(Software Menu item
#7).
This adjusts the dot-to-dash
ratio. Default is 3:1. Other
