Description

The SunSDR2 PRO transceiver was designed for advanced operation on HF and VHF bands, even the most demanding operator will be surprised by its capabilities. Modern hardware along with the ExpertSDR2 software makes this high-performance SDR transceiver the perfect base station and at the same time perfectly suitable for field operations.

Main capabilities

• Independent RX path based on DDC (Direct Down-Conversion) architecture
• Independent TX path based on DUC (Direct Up-Conversion) architecture
• ExpertRemote system provides full remote control of the transceiver
• An opportunity to use the transceiver in the SO2V mode
• Full or half-duplex mode*
• 2 software receivers + SubRX for each of them (4 slices total) + independent wideband Bandscope up to 80 MHz
• Antenna switch with 2 HF antenna connectors and separate VHF antenna connector
• Supports use of VHF transverters
• An opportunity to use the transceiver as a signal generator via DAC OUT connector
• Built-in power-meter and SWR-meter for HF bands
• ExtCTRL connector to control external devices with 8 powerful keys with open collector
• Ethernet LAN interface provides fast and reliable connection to PC
• ALC connector for external power amplifiers**
• TCI interface for seamless connection with third-party software like SDC (with its own Skimmer), LogHX, SWISSLOG and RUMlog, more are coming
• Professional TX processing module provides the most advanced tuning capability for voice operation
• Small delay in CW mode (about 10 ms)

* Full-duplex mode is supported by the transceiver's hardware but is not implemented in the firmware and software yet. This mode will be implemented in future versions of ExpertSDR2 software.

** ALC functionality is supported by the transceiver's hardware but is not implemented in the ExpertSDR2 software. It will be supported in the ExpertSDR2 1.3 software release.

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
• The ExpertSDR2 works with Windows 7-10, OS Linux Ubuntu x64 and macOS 10.12 and newer

Architecture description

Transceiver SunSDR2 PRO configuration

• Transceiver SunSDR2 PRO
• LAN-cable for connection to a local network (1.8m)
• Power cable for connection to a power supply (2m)
• Audio-adapters JACK 6.3mm to JACK 3.5mm (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 a 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 implemented after 5 years of manufacturing and extensive usage of the SunSDR2.