Description

The SunSDR2 DX transceiver is the smallest 100W 160M-6M + 2M HF/VHF SDR transceiver in the world, which makes it ideal companion for your future contests and DXpeditions. It is based on a popular well-known SunSDR2 PRO model. On top of all our previous radios functionality the SunSDR2 DX transceiver offers new features, such as compact hardware design, active cooling, improved power supply system and dedicated connector for a native external ATU. The upgraded hardware design coupled with the ExpertSDR2/3 software makes this high-performance SDR transceiver an outright base station for any DXpeditions and home use.

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

• Redesigned TX filter of the DAC chip, which provides better linearity of the TX signal
• Redesigned 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