Space Ground Link Subsystem TT&C Transponder
TOR Compliant, S-Band TT&C Transponder
The Space Ground Link Subsystem (SGLS) TT&C Transponder is a space-qualified, TOR-compliant, S-band transponder that provides compatibility with the Air Force Satellite Control Network (AFSCN) SGLS telemetry and command formats in a single, highly reliable unit. This transponder has been designed for the demands of space including missions in low Earth orbit (LEO), medium Earth orbit (MEO) and geosynchronous Earth orbit (GEO).
- Fully Aerospace TOR compliant (parts, materials, and processes)
- Radiation Hardened for the harsh Medium Earth Orbit (MEO) and for use in Strategic nuclear environment
- Operating modes commanded via latching relays for reliable operation
Further customization is available, please contact us to discuss your unique requirements.
Features
The Space Ground Link Subsystem (SGLS) TT&C Transponder operates at uplink command rates of 1 kbps and 2 kbps (automatically detected) and provides downlink telemetry data rates up to 32 kbps on a 1.7 MHz subcarrier. Coherent operation, including ranging, is selectable via command, as is rate 1/2, constraint length 7 convolutional encoding. For signal security the unit provides interfaces to the KG-327 cryptographic unit for uplink decryption and downlink encryption. Being fully compliant to Aerospace Parts, Materials and Processes TOR requirements* results in lower life-cycle costs by reducing the probability of parts issues impacting spacecraft integration and test efforts.
Receiver Features
- Operating mode: SGLS/ AFSCN including Ternary FSK
- Noise figure:< 4.0 dB
- Operating Frequency: 1760 to 1840 MHz
- Acquisition: Auto acquisition (± 100 kHz)
Transmitter Features
- 7W TX power
- Operating Frequency: 2200 to 2300 MHz
- Data Rates: up to 32 kbps on 1.7 MHz subcarrier
- Meets NTIA mask
- Can be configured as a non-coherent transceiver or coherent transponder
- R 1/2, K=7 convolutional encoder
- Coherent ranging
- Automatic Transmitter Turn On capability with uplink signal
Specifications
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Space Ground Link Subsystem (SGLS) TT&C Transponder Data Sheet
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View Document
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| Interface | 1553B SV interface RF connectors are SMA-F Non-RF connectors are sub-miniature D Digital interfaces are differential RS-422 compatible line drivers and receivers Operating modes commanded via latching relays DC power 68-71 VDC: < 15 Watts receive-only mode, < 45 Watts full duplex Analog telemetry: Voltage Monitor, Receiver AGC, RX frequency offset, Temperature Monitors (passive thermistors), RF Output Power Monitor Hard-line baseband command interface for spacecraft checkout Interface to standard cryptographic equipment (e.g, KG327) |
| Size | 8.7” x 7.6” x 6.9” (Including mounting feet, connectors and semi-rigid cables) |
| Weight | 17.5 lbs. |
| EMI/ EMC | MIL-STD-461C |
| Radiation | Radiation hardened for natural and man made environments
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| Vibration | 17.2 Grms (Qualification level) |
| Shock | 1123 G Peak, 1723 Hz |
| Temperature | -34° C to +71° C |
