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SunSDR2 DX User Manual
© 2020 Expert Electronics
REAR PANEL DESCRIPTION
diodes). If your inductive load gives a higher reverse current, it is necessary to use an external
diode in parallel to the connected load.
·
The X8 key is designed for control of the external PA.
Warning!
i
Never use a VGA cable from your monitor, to connect external devices
i
Never connect monitors with the VGA interface to the ExtCTRL connector
i
Incorrect connection of external devices and / or uncontrolled galvanic
connections could lead to the malfunctions of the transceiver or its failure!
3.6 Reference input
A 10 MHz external reference oscillator can be connected to the REF IN connector with a
coaxial cable.
Set the Use external reference checkbox in the ExpertSDR2 menu to use an external
reference oscillator (more details in Device menu).
Signal parameters of the Reference Frequency:
·
Reference signal frequency of 10 MHz
·
Reference signal voltage: min. 2.5 V; max. 3.3 V
·
Input impedance of 500 Ohm
·
SMA type connector (female)
Note:
·
Use an external reference oscillator via REF IN connector to increase the stability of the
transceiver's tuning frequency, if +/- 0.5 ppm stability is not enough. Also transceiver's
frequency synchronization with an external reference oscillator is used when you want to sync
several devices with each other, from one reference oscillator.
·
The Phase frequency of the transmitted and received signals depends on the phase
frequency of the external reference oscillator.
3.7 Transverter connection
Connect VHF, SHF transverters to the A1 connector of the transceiver.
VHF, SHF transverter may also be connected to the transceiver via the ADC IN and DAC
OUT connectors.
ADC IN used as the input in the RX mode. DAC OUT used as the output in the TX mode.
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