Flight Heritage since 2018
ISIS TXS High Data Rate S-Band Transmitter
Price on request
- Operates in EESS/SRS/SOS allocation band
- CCSDS compliant
- Data-rate and RF power re-configurable in-flight
- RF power control loop to maintain constant RF power over the temperature range and Frequency band
- SFCG Spectral mask compliant (Recommendation: SFCG-21-2R4)
- Safety watchdog
- Adjustable RF output power from 27 to 33dBm (0.5dB steps)
- RF output tolerant to full mismatch
- Description
- Performance
- Product properties
- Available configuration
- Testing
- Documents
Description
The ISIS High Data-rate S-band Transmitter is a CubeSat compatible Transmitter designed to meet the needs of high data-rate downlinks of up to 4.3 Mbps (usable information bit-rate at CCSDS transfer frame level). The transmitter can be used for both TT&C or PDT downlinks. The S-band transmitter is flexible, implementing CCSDS as data link layer protocol and allowing in-flight configuration of data-rate, modulation scheme, frequency, and RF output power.
Frequency range | 2200 – 2290 MHz |
Frequency step size | 1 kHz |
Frequency stability | +/-10 ppm |
RF output power | 27 to 33 dBm (settable) ± 1 dB |
Spurious emissions | Less than -60 dBc |
Transmitted data rate (on-air) | up to 10 Mbit/s (5 Msym/s, OQPSK) |
Useful information bitrate | up to 4.3 Mbit/s (at TM transfer frame level), settable in 4 steps. Support up to 7.6 Mbit/s is under development |
Modulation scheme | Suppressed carrier: BPSK, OQPSK as per CCSDS 401.0-B |
Pulse shaping filter | Root raised cosine Nyquist pulseshaping as per CCSDS 413.0-G. Roll-off: 0.35 / 0.5 selectable |
Forward Error Correction | Convolutional (K=7, ½) as per CCSDS 131.0-B |
Reed Solomon (223, 255) as per CCSDS 131.0-B | |
Pseudorandomization | Pseudorandomization as per CCSDS 131.0-B |
Synchronization | 32 bit Attached Sync Marker as per CCSDS 131.0-B |
Power consumption | 13 W (for 33 dBm RF output power), upgrade in power efficiency under development (join our mailing list) |
DC supply voltage | 7 to 20 V |
Payload data interface | LVDS |
Housekeeping data interface | I2C |
Dimensions | 98.81 x 93.26 x 14.52 mm |
Mass | 120 g |
Operating temperature | -40 to +70 °C |
- Operates in the 2200-2290 MHz EESS/SRS/SOS allocation
- CCSDS compliant channel coding ensures compatibility off-the-shelf demodulators as well as various groundstation networks
- Compatibility with the following demodulators has been verified:
- Zodiac CORTEX CRT
- Teledyne Qubeflex
- Amergint satTRAC
- RT Logic / KRATOS quantumGND
- Antwerp Space Omnisat LT
- Compatibility with the following groundstation networks has been verified:
- KSAT-lite
- Strong Forward Error Correction (FEC) to maximize link throughput
- No need for data pre-processing: all channel coding is performed inside the transmitter
- Up to 4.3 Mbit/s useful datarate (at CCSDS TM Transfer Frame level)
- In-flight configurable RF parameters (frequency, data-rate, RF power, FEC parameters)
- Data interfaces: LVDS (payload data), I2C (housekeeping)
- Safety watchdog
- Adjustable RF output power from 27 to 33 dBm
- Power control loop to keep RF output power constant over varying operating conditions
- IPC-A-610 Class 3 assembly
- Default RF parameters:
- transmit frequency
- modulation scheme
- roll-off
- symbol rate
- transmit power
- CCSDS Spacecraft Identifier)
- I2C and CAN watchdog implementation
- CSKB-lite connector configuration
- Grounding interface configuration
Qualification and Acceptance testing
Test | QT | AT |
Functional | ✔ | ✔ |
Vibration | ✔ | ‐ |
Mechanical Shock | ✔ | ‐ |
Thermal Cycling | ✔ | ‐ |
Thermal Vacuum | ✔ | ‐ |
Total Ionizing Dose | ‐ | ‐ |
*QT is performed on the design/qualification model
*AT is performed on the unit to be shipped