The SunSDR2 DX transceiver is based on the well-known SunSDR2 PRO model with various hardware improvements. It is very compact for a 100W format, has active cooling, and an improved supply system, meaning it’s perfectly suited for DXpeditions. Also, it has a separate connector for an external ATU, thus SunSDR2 DX has all the functionality you got used to in our radios and even more. Improved hardware along with the ExpertSDR2/3 software makes this high-performance SDR transceiver the perfect base station. The obvious choice for any radio amateur!

Hardware improvements of Gen5 (late 2022) in comparison to Gen1 (November 2019):

• Redesigned heatsink, with thinner and more frequent gills for higher effectiveness
• Improved temperature sensor placement for more accurate temperature readings

• Improved TX IMD3 up to ~37 dB across all HF bands, with 100W output power
• 6M output power have been increased up to 80W
• Improved SDR PCB protection from cross-talks. Improved protection for the supply chain
• Added ferrite bead on the flex-cable connecting PA and SDR PCBs, for more stable operation with external ATU
• Added filtering of the headphones' connector

• Slight improvement of the RX path

• TX filter of the DAC chip, which provides better linearity of the TX signal
• Band pass filter on the PA input, which improves linearity of PA operation
• Improved structure of 160, 6M TX filters
• RX/TX switching node on PCB is more resilient now

Hardware improvements in comparison to SunSDR2 PRO:

• HPF for VHF (100 MHz) to eliminate strong out-of-band stations coming from HF
• LPF for HF (70 MHz) to eliminate strong out-of-band stations coming from VHF
• New VHF LNA chip - PGA103+
• New high-performance built-in stereo audio codec 24-bit with 114 dB dynamic range (CS4272)
• Improved supply system, which leads to less heating and less power consumption
• Active cooling
• Antenna switch supports Predistortion without external devices
• Improved topology of SDR PCB

Main capabilities

• Independent RX path based on DDC (Direct Down-Conversion) architecture
• Independent TX path based on DUC (Direct Up-Conversion) architecture
• Output power: 100W on HF, 80W on 6M and 8W on 2M
• 2 software RXs + SubRX for each of them (4 slices total) + independent wideband Bandscope up to 80 MHz
• Remote control operation, using it, you connect PTT and CW-key to the E-Coder panel. Microphone and E-Coder are connected to the remotely set up PC
• TCI interface for seamless connection with third-party software, the list of software with TCI support
• Professional TX processing module provides the most advanced tuning capability for voice operation
• ExtCTRL connector to control external devices with 8 powerful keys with open collector
• ALC connector for external power amplifiers*
• Supports use of VHF transverters
• An opportunity to use the transceiver as a signal generator via DAC OUT connector (SMA connector)
• An opportunity to use external filters in the middle of the RF path, using ADC IN and RX OUT (SMA connector)
• Monitoring delay in CW mode is about 2-3 ms
• Input for external 10 MHz reference oscillator
• An opportunity to use the transceiver in SO2V mode
• Full duplex or half-duplex modes**
• Antenna switch with 2 HF antenna connectors and separate VHF antenna connector (Mini UHF connectors)
• Internal power-meter for HF and VHF bands and SWR-meter for HF band
• Ethernet LAN interface provides a fast and reliable connection to PC

* ** These functions are supported by the transceiver's hardware, but is not implemented in the ExpertSDR2 software.

Architecture description

SunSDR2 DX complete set

• Transceiver SunSDR2 DX
• External fan, size 140 x 140 mm
• 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.)

Additional accessories:

• E-Coder Plus or E-Coder control panel for comfortable tuning