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SunSDR2 DX User Manual
© 2020 Expert Electronics
TRANSCEIVER OPERATIONS
Play t he recorded signal wit h t ransmit t ing it on t he air:
1. Press the Play button
with the left mouse button to play the recorded voice signal in
phones and transmit it on the air.
2. When the playback ends you'll hear the air again.
Note:
·
If a recorded signal, which was received from the air, wasn't compressed by the transmitter, it
has low RMS power - lower, than compressed signal. Voice recorder has its own AGC, it
doesn't allow TX signal level to surpass the maximum threshold, to avoid clipping. This AGC
has maximum amplitude threshold for audio signal output: +3 dB, it allows an operator to hear
slight clipping with a high gain level of voice recorder signal and adjust correct Volume for TX
coefficient, keeping a good quality of TX signal. The Peak level set in ExpertSDR2 is 0 dB. The
RMS signal level is 3 times weaker by amplitude than peak level. TX signal, recorded by the
Voice Recorder, is transmitted on the air without processing e.g. TX processing module does
not influence signal transmitted via the Voice Recorder.
·
Attention, recordings of the air signals should be used for personal use only. SunSDR2 DX
operator bears full responsibility for using the recorded signal.
·
You may record your own CQ (come quick) signal and transmit it on the air by pressing the
Play button
.
7.6
SPLIT operation
VFO A/TX, VFO B/TX – SPLIT operation allows you to receive on the VFO A frequency and
transmit on the VFO B frequency. You cannot receive on the VFO B frequency in the SPLIT
mode.
To use the SPLI T operation:
1. Activate the SPLI T mode by pressing the TX button near the VFO B frequency indicator to
turn to TX on this frequency. Flashing red indicator in the software window means the SPLI T
mode is enabled.
2. Set the required transmit frequency (VFO B) in the SPLI T mode. Disable t he SPLI T mode
by pressing the TX button the second time.
Note:
·
While you are in CW mode with BREAK IN function enabled, the transceiver will turn to TX
on VFO B frequency automatically when pressing the CW key.
·
While in digital modes the transceiver will turn to TX on VFO B frequency automatically if
received the PTT signal via the CAT-system or a certain COM-port.
Summary of Contents for SunSDR2 DX
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