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The ISIS S-band Transmitter is a transmitter designed to meet data rate downlinks of up to 4.3 Mbps with CubeSat compatibility.

The transmitter can be used for both Telemetry, Tracking and Command (TT&C) systems or Payload Data downlinks.

The S-band transmitter is flexible and implments CCSDS as data link layer protocol. The system allows in-flight configuration of modulation scheme, frequency, data-rate, and RF output power.

The data rate is the usable information bit-rate at CCSDS TM Transfer Frame level.

Key features

  • Operates in the 2200-2290 MHz EESS/SRS/SOS allocation
  • CCSDS compliant channel coding
  • Compatibile with off-the-shelf demodulators as well as various ground station networks
  • RF power control loop
  • SFCG Spectral mask compliant (Recommendation: SFCG-21-2R4)
  • Safety watchdog
  • Adjustable RF output power
  • RF output tolerant to full mismatch
  • Strong Forward Error Correction (FEC) to maximize link throughput
  • No need for data pre-processing: all channel coding is performed inside the transmitter
  • In-flight configurable RF parameters
  • Data interfaces: LVDS (payload data), I2C (housekeeping)
  • IPC-A-610 Class 3 assembly

Flight heritage

Flight heritage since 2018

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Last updated: 2022-03-29

S-Band High Data Rate Transmitter

16,500 EUR


  • CAD model(3.45 MB)
  • Datasheet(844.48 KB)
  • ICD
  • Option sheet(1022.86 KB)
  • User manual


132 g
93.3 mm
98.8 mm
14.5 mm
supply voltage
7 to 20 V DC
power consumption
13 W (for 33 dBm RF output power)
2200 to 2290 MHz (EESS/SRS/SOS allocation)
OQPSK selectable as per CCSDS 401.0-B
data rate
up to 10 Mb/s (5 Msym/s, OQPSK)
transmit power
27 to 33 dBm
operating temperature
-40 to 70 C


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