UHF transceiver
SPUTNIX
A single-board CubeSat UHF radio (SXC-UHF-02) for telemetry, telecommand and beacon transmission with in-flight reconfigurable parameters.
Technical specifications
- Model
- SPUTNIX SXC-UHF-02
- Feature
- Half-duplex communication via single antenna
- Feature
- Single board radio for telemetry, telecommand and beacon
- Feature
- CAN command schedules execution and storage using ROM memory
- Feature
- In-flight reconfigurable beacon period, datarate, frequency, call sign etc.
- Feature
- In-flight firmware update via RF with backup
- Feature
- Hardware and software watchdogs
- Feature
- Customizable beacon message
- Feature
- Ground to board UniCAN routing
- Feature
- RTC with backup power
- Feature
- Rich telemetry
- Feature
- Fail-safe in-flight reconfiguration
- Dimensions, mm
- 84 x 94 x 19
- Mass, g
- 43
- Supply voltage, V
- 6..8.4
- Maximum power consumption in RX mode, W
- 0.4
- Maximum power consumption in TX mode, W
- 5.0
- Data interfaces
- 2xCAN2.0B, UART
- Antenna interfaces
- RF (SMA 50 Ohm)
- Physical/datalink layer protocols in RF channel
- AX.25 (G3RUH), USP (using FEC)
- FEC type (USP mode)
- Concatenated code + RS code (meets CCSDS 131/0-B-3)
- Telemetry content
- Temperatures of MCU and RF, voltage, current, forward/reflected power, RSSI, current time
- Network Protocol support in RF/CAN
- UniCAN
- Additional features
- SSTV image transmission, Morse code transmission, FM voice repeater (with second transceiver and antenna)
- Operating frequency (option 435 MHz)
- 433-438 MHz
- Operating frequency (option 401 MHz)
- 400.1-402 MHz
- Operating frequency (option 145 MHz, Rx-only)
- 144-146 MHz
- Maximum output power
- 33 dBm (for 7.4V input, factory-configurable)
- Modulation type
- GMSK
- Raw (channel) data transfer rate
- 57600, 38400, 19200, 9600, 4800, 2400 bit/s
- Receiver sensitivity, AX.25 mode
- ≤-114 dBm (for 9600 bitrate, BER≤10-4)
- Receiver sensitivity, USP mode
- ≤-122 dBm (for 9600 bitrate, PER≤10-2)
- RF frequency stability
- ≤0.5 ppm
- RF frequency drift by aging (first year)
- ≤1.5 ppm
- Timebase precision
- ≤5 ppm
- Unwanted emissions in spurious domain
- Meets ITU SM.329-12
- Unwanted emissions in out-of-band domain
- Meets ITU SM.1541-4, SFCG 21-2R4, NTIA
- Onboard flash memory for user data
- 16 Mbytes
- Operating temperature range
- -30...+50°C
- Storage temperature
- -40..+60°C
- Mechanical vibration
- 10g (request full test report)
- Mechanical shock
- 50g (request full test report)
About
The SPUTNIX UHF transceiver is designed to provide communication between a spacecraft and a ground control center for receiving commands, transmitting telemetry information (including configurable beacons), or other information. It is optimized to work at low bitrates in UHF bands (amateur or commercial, depending on ordering option). The transceiver works as a UniCAN router, allowing seamless information exchange between onboard devices and the ground station. There is flash memory with a file system for user data storage, with file download/upload via the UniCAN file transfer protocol. The transceiver also works as an onboard time-keeping unit with precision timebase and backup power, and can run UniCAN commands in an executable schedule mode, implementing onboard control unit features. The SXC-UHF-02 transceiver is a PC/104 stackable PCB with an SMA antenna connector and auxiliary antenna deployment interface.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.
