Full-duplex High-speed S-band Transceiver (SRS-4)

The Satlab SRS-4 is a full-duplex S-band transceiver designed for high-speed data transfer on micro- and nano-satellites.

The transceiver operates on the ITU space operations S-band frequencies with BPSK, QPSK and 8PSK modulation and CCSDS recommended channel coding, enabling integration with both independent and commercial ground station networks.

The SRS-4 has demonstrated reliable flight heritage since 2021, with over 100 units successfully delivered to customers around the world for a multitude of space missions. With a TRL of 9, it is fully qualified and operational in its intended environment.

Features

• Variable transmit symbol rate up to 5 MBd

• BPSK, QPSK and 8PSK transmit modulation

• BPSK and QPSK receive modulation up to 5 MBd

• Run-time configurable convolutional and/or Reed-Solomon forward error correction

• Adjustable output power up to 33 dBm with power monitoring and regulation

• CAN-bus and RS-422 interfaces using CubeSat Space Protocol (CSP)

• Ethernet interface using IP

• AES-256-GCM link-layer encryption and authentication

• PC/104 form factor aluminum enclosure

• Delivered with support library for easy integration

• Fully on-orbit software upgradable

Key Parameters

• Transmitter frequency: 2200 to 2290 MHz

• Transmitter modulation: BPSK/QPSK/8PSK, 100 kBd to 5 MBd

• Transmitter power: 20 to 33 dBm

• Receiver frequency: 2025 to 2110 MHz

• Receiver modulation: BPSK/QPSK, 100 kBd to 5 MBd

• Receiver sensitivity: -122 dBm (<1% PER, 100 kBd BPSK)Input voltage5.1 to 28.8 V

• Typical power consumption(6 V input, 20℃):
  RX: 1.5 W (5 MBd)
  RX+TX: 10.8 W (5 MBd, 33 dBm output)

• Operating temperature
  RX: -40℃ to +85℃
  TX: -40℃ to +70℃

• Dimensions93.0 mm × 87.2 mm × 17.5 mm

• Mass253 g