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

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

Parameter	Specification
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 voltage	5.1 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℃
Dimensions	93.0 mm × 87.2 mm × 17.5 mm
Mass	253 g

Additional Resources

Customization

Custom hardware and software requests can often be accommodated. Please see the R&D section

Price and lead time on request

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