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SunSDR2 DX User Manual
© 2020 Expert Electronics
ExpertSDR2 SOFTWARE DESCRIPTION
·
Deviat ion – FM deviation. The width of the FM signal on air will be twice the deviation width.
·
High - frequency of the high filter slope of the LF signal before FM demodulator. Set the
required LF signal width from zero up to high filter edge.
Voice Recorder - settings of the playback level.
·
Volume f or TX – additional gain volume in TX for the voice record. Set this parameter so that
the signal on MIC-meter would reach -10...-5 dBW values.
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 limit for audio signal 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.
PA cont rol - external PA control settings.
·
Enable PA in Tone mode - checkbox to enable the TX mode of the external PA in the Tone
mode (transmission of the carrier frequency). Set the Enable PA in Tone mode checkbox to
enable the TX mode for the external PA while transmitting the carrier frequency. This mode
might be useful to tune PA's tuner unit.
TX Filt er Taps - transmit Filter Taps settings.
·
SSB - Filter Taps in SSB mode.
·
AM/NFM - Filter Taps in AM mode and narrowband FM.
·
DI G L/DI G U - Filter Taps in DIGL and DIGU modes.
PTT swit ching delay – set the delay time between switching the transceiver to RX/TX and the
first relay closure.
·
Rx t o Tx – delay time to generate HF signal after turning from RX to TX.
·
Tx t o Rx – when you stop transmitting, the transceiver waits for the certain “delay time” then
switches from TX to RX.
Warning!
Содержание SunSDR2 DX
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