SunSDR2 PRO is a direct sampling SDR transceiver developed for serious DXing and contesting.

SunSDR2 PRO is a direct sampling SDR transceiver developed for serious DXing and contesting.
SunSDR2 PRO is a direct sampling SDR transceiver developed for serious DXing and contesting.
Brand: Giga
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Price: R23,500.00
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SunSDR2 PRO is a​ direct sampling SDR transceiver developed for serious DXing and contesting.

The SunSDR2 PRO transceiver is designed for advanced use in HF and VHF bands. Even the most experienced operator will be surprised by its capabilities. The modern hardware in a small physical size makes this high-performance SDR transceiver the perfect base station while at the same time very portable for field operations.

SunSDR2 PRO has a special connector for controlling the external devices. It allows connecting to it practically any power amplifiers, rotators, narrow band pass filters, etc. With a help of this capability your place can become a professional studio for work in the air.

The SunSDR2 PRO is perfect for contesting. Its powerful and flexible software lets you create custom designed station setups for many different types of contest efforts.

Main capabilities

  • Separate independent receive path based on Direct Down-Conversion principle (DDC)
  • Separate independent transmitter, based on the Direct Up-Conversion principle (DUC)
  • Full or half-duplex mode *
  • Antenna switch for 2 antennas in HF
  • Built-in power-meter and SWR-meter in HF band
  • External control connector for other devices, 8 powerful keys with open collector
  • ALC connector for external power amplifiers**
  • Input connector for connecting PTT footswitch
  • Input connector for connecting CW-key
  • Output Jack for headphones, impedance 8-1000 Ohm
  • Microphone input Jack for electret microphone
  • Microphone connector with PTT switch Yaesu MH-31, which contains microphone, PTT button, and 3 additional functional buttons
  • Protection from polarity reversal
  • Ethernet LAN interface provides galvanic isolation between transceiver and PC
  • Transceiver's calibrations are kept inside the device. No need for primary calibration
  • A possibility of remote work. PTT footswitch and CW-key are connected to the E-Coder panel, microphone – to the PC

* Full duplex mode is supported by the transceiver's hardware but is not implemented in the ExpertSDR2 software. It will be supported in the future ExpertSDR2 software releases.

** ALC functionality is supported by the transceiver's hardware but is not implemented in the ExpertSDR2 software. It will be supported in the future ExpertSDR2 software releases.

Application field

  • Radio Amateur HF/VHF transceiver
  • Remote reception point for contests
  • SO2R/SO2V working contest-station
  • Spectrum analyzer with the spectrum scope up to 80MHz
  • Record air stations with the further reproducing

PC requirements

  • CPU Intel Core i3 1.6 GHz and higher
  • Video card, minimum resolution 1024x600, 128 MB, OpenGL 1.5 support and higher
  • Local network connector 100 Mbps or 1 Gbps
  • OS Windows 7 and newer, OS Linux Ubuntu x64


The ExpertSDR2 works with Windows 7-10 and Linux Ubuntu/Kubuntu.

Architecture description.

Transceiver SunSDR2 PRO configuration

  • Transceiver SunSDR2 PRO
  • LAN-cable for connecting to local network (1.8m)
  • Power cable for connecting the transceiver to power supply (2m)
  • Audio-adapters  JACK 6.3mm to JACK 3.5mm for connecting PC's headset to the transceiver (2 pcs.)
  • RF Cable  Mini UHF — HF (PL259) 1Ft (0.3m 1 pc.)


The main improvements in SunSDR2 PRO in comparison to SunSDR2

  1. High-speed ADC LTC2209 instead of LTM9001CV-BA, as a result, the transceiver has higher dynamic range - 129...130 dB instead of 118-120 dB in SunSDR2. It allows you to work with enabled preamp +10 dB alongside strong АМ stations within the octave filters bandwidth, which is very important for 20M, 17M, 15M, with low air noise level and good propagation. The receiver is almost impossible to overload.
  2. LPFs in the power amplifier was increased to 5th order, instead of 3rd.
  3. Improved antenna switch, idle connectors shorted on the case. It eliminates crosstalk from HF antennas while working on the VHF band and vice versa.
  4. BNC antenna connectors were replaced with more reliable mini-UHF.
  5. Improved HF crosstalk protection on all connectors: PTT, CW, MIC.
  6. Added diode protection to ExtCTRL keys. Voltage output +12...+15 V now goes via 1 А fuse and polarity reversal protection on the ExtCTRL connector instead of 5 V.
  7. Improved heatsink - it is a single detail instead of multilayer construction as before.
  8. Improved PCB board - transistors and VHF path are placed in the PCB space with the shortest outputs. Improved PCB structure, added layers from 4 to 6.
  9. And a lot of other small improvements.

SunSDR2 PRO transceiver is optimized for mass production with improvements, which were added after 5 years of manufacturing and extensive usage of the SunSDR2.



General coverage receiver in HF, MHz 0.09...65
General coverage receiver in VHF, MHz 95...148
Frequency coverage in HF in TX mode, MHz All amateur frequencies
Frequency coverage in VHF in TX mode, MHz 144...146
Sensitivity, uV 0,07
Nominal transmitter's output power in HF, W 15
Nominal transmitter's output power in VHF, W 7
Blocking dynamic range in HF mode (BDR), dB 129

Blocking dynamic range in VHF mode (BDR), dB

RF type of ADC LTC2209, Linear Technology
RF ADC clock frequency, MHz 160
RF ADC resolution, bit 16
RF DAC clock frequency, MHz 640
RF DAC resolution, bit 14
Recommended power supply, V 15
Local oscillator's stability, ppm +/- 0.5
Supply voltage range, V 12...16
Current consumption RX/TX, А 1.25/5
Built-in audio codec resolution, bit 24
ALC input voltage range, V 0..4
Operating temperature, ºC 0...+75
Dimensions, mm 165х165х3
Weight, kg 1,5

* More modes can be supported via external software

Specifications are subject to change without notice or obligation and specifications are only guaranteed within the amateur radio bands.


pdf Terms of the product's warranty

pdf SunSDR2 PRO Getting Started

This document describes first steps with the SunSDR2 PRO transceiver.

pdf ExpertSDR2 User Manual v1.4

ExpertSDR2 User Manual v1.4 for SunSDR2 PRO transceiver 24.11.2017

pdf SunSDR2 PRO Hardware Manual_v1.2

Hardware manual for SunSDR2 PRO transceiver 18-Jan-2018

pdf Betriebsanleitung V1.2 (User Manual in German)

User Manual for SunSDR2 PRO transceiver in German 12-02-18

pdf ExpertSDR2 and CW Skimmer

This guide describes how to setup ExpertSDR2 for use with one or two CW Skimmers.


Useful diagrams

pdf Using the transceiver for SO2V operation

pdf Using the transceiver for SO2V operation with SDC

Both diagrams can be used for creating two working places with a single SunSDR2 PRO transceiver.

pdf Connecting an external PA, fan, relay etc. to the SunSD2 PRO

In this document, you can find information about how to connect the SunSDR2 PRO to an external PA, fan, or relay to control the external BPF, antenna switch, etc. 

pdf Control cable schematic for external PA VL-1000 (Yaesu)

This schematic allows you to assemble your own control cable for PA VL-1000 by Yaesu. With this cable, you control PA's bands and RX/TX mode. This cable might be used for control of other devices, which works with 4-contact control protocol by Yaesu, e.g. PAs, antenna switches etc.

Warning! Software for each device is different! Double-check your device before downloading!


installer ExpertSDR2 v.1.2.0 RC7_SunSDR2_PRO

installer ExpertSDR2 x64 v.1.2.0 RC7_SunSDR2_PRO
Firmware v. 41.8 dd: 02-11-2016


pdf ExpertSDR2 1.2 RC7_Release_Notes

pdf ExpertSDR2 1.2 RC6_Release_Notes

pdf ExpertSDR2 1.2 RC5_Release_Notes

pdf ExpertSDR2 1.2 RC4_Release_Notes

pdf ExpertSDR2 1.2 RC3_Release_Notes

pdf ExpertSDR2 1.2 RC2_Release_Notes

pdf ExpertSDR2 1.2 RC_Release_Notes

pdf ExpertSDR2 1.2 beta_6_Release_Notes

pdf ExpertSDR2 1.2 beta_5_Release_Notes

pdf ExpertSDR2 1.2 beta_4_Release_Notes

pdf ExpertSDR2 1.2 beta_3_Release_Notes

pdf ExpertSDR2 1.2 beta_2_Release_Notes

pdf ExpertSDR2 1.2 beta_1_Release_Notes

pdf ExpertSDR2 1.2 alpha_5_Release_Notes

pdf ExpertSDR2 1.2 alpha_4_Release_Notes

pdf ExpertSDR2 1.2 alpha_3_Release_Notes

pdf ExpertSDR2 1.2 alpha_2_Release_Notes
pdf ExpertSDR2 1.2 alpha_Release_Notes


installer ExpertSDR2 v.1.1.3
Firmware v. 41.8 dd: 02-11-2016


installer ExpertSDR2 v.1.1.3_North America
Firmware v. 41.8 dd: 02-11-2016


To use the ExpertSDR2 software, please install the Visual Studio Redistributable 2017 either from the ExpertSDR2 installer or from the official Microsoft website:


 Linux x64 (created by Ubuntu 16.04)

installer ExpertSDR2 v.1.2.0 RС7

Firmware v. 41.8 dd:02-11-16


installer ExpertSDR2 v.1.1.3_North America
Firmware v. 41.8 dd: 02-11-2016


mac oc x macOS

installer ExpertSDR2 v.1.2.0

Published on 20-April-2018

Firmware v. 41.8 dd:02-11-16

ExpertSDR2 works on macOS 10.12 Sierra (earlier versions weren't tested).


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