ISIS UHF uplink/UHF downlink Full Duplex Transceiver

Price on request

  • Full duplex communication
  • Data rate re-configurable in-flight
  • FM transponder mode available
  • Safety watchdog
  • Low power consumption
  • Single PCB radio
  • Single board Telemetry, Telecommand and Beacon capabilities


The ISIS UHF uplink/UHF downlink transceiver is a full-duplex communication system for CubeSat TT&C applications. The radio can operate in commercial bands of the UHF frequency spectrum. It is low power, low mass, and highly configurable, offering the flexibility of changing data rates and frequencies in flight. This radio is tailored for CubeSat missions and cross-compatible with other subsystems such as onboard computers and antenna systems.



Dimensions: 90 x 96 x 15 mm
Mass: 75g
Supply voltage range: 6.5 – 20 V DC
Power consumption: 0.48W (receiver only)

4 W (transmitter on)

Operating temperature: -20 to +60 deg C
RF interfaces: MMCX (50 ohm)
Data interfaces: I²C



Frequency range: 267-273 MHz
Transmit power:

Modulation options:

27 dBm

Binary Phase Shift Keying (BPSK) with G3RUH scrambling

Data rate selectable: 1200, 2400, 4800 and 9600 bps
Datalink layer protocol: AX.25 or HDLC



Frequency range: 312-322 MHz
Modulation: Frequency Shift Keying (FSK) with G3RUH scrambling
Data rate: 9600 bps
Sensitivity: -104 dBm Sensitivity for BER 1E-5
Datalink layer protocol AX.25 or HDLC



  • Receiver/Transmitter operating frequency
  • Downlink data rate
  • Custom beacon message (AX.25)
  • CSKB connector type and location
  • RF connector position and orientation
  • I²C watchdog implementation