T-722 X-Band
Transcription
T-722 X-Band
T - 722 X - B and 400 Mbps OQPSK Transmitter with AES Encryption and Reed-Solomon Encoding Clock & Data Interface - The unit accepts primary and secondary data and clock inputs on a parallel Low Voltage Differential Signaling (LVDS) interface. The parallel data interface consists of 4 bit words at up to 50 Mbps each for both the I and Q channels. There are two encrypt/plaintext control inputs to provide a real time cryptographic bypass permitting frame headers to be transmitted unencrypted. LVDS outputs include reference data clock allowing for synchronization to other equipment and a RS enable used for flow control. Data processing options include Advanced Encryption Standard (128/256-bit), Reed-Solomon with a 1 Mbyte FIFO buffer used to absorb RS parity data growth, PN randomization, and differential coding. Modulator - Data is Offset Quadrature Phase Shift Key (OQPSK) modulated onto an X-Band carrier using a modulator with phase balance < 4°, amplitude balance < 0.75 dB p-p, and > 30 dBc carrier suppression. SSPA - Modularized high efficiency XBand gain stages implemented with GaAs FET technology are cascaded to provide an output power of 7.5 Watts at the highest RF power control setting. RF output power is variable via on orbit command in 0.5 dB steps. Carrier Generation - The carrier is internally generated with less than 2° RMS phase noise over all operating environments. Information Security - Embedded AES (NIST validated to FIPS 140-2) encryption offers the user information security via an algorithm that is accepted worldwide for secure information encoding from electronic mail to ATM personal identification numbers. The user has the option of having the AES algorithm configured for a 128 bit or 256 bit key. Secure Performance The L-3 Communications Cincinnati Electronics model T-722 is a high data rate Offset Quadriphase Shift Keyed (OQPSK) transmitter designed for use on spacecraft and satellites with large payload data requirements. Transmit data rates as high as 400 Mbps are OQPSK modulated and amplified to 7.5 Watts output power. This unit also provides embedded AES (Advanced Encryption Standard) and ReedSolomon encoding. T-722 Characteristics Input Characteristics Data I and Q (4 Bit Words) LVDS Clock I and Q LVDS Data Valid LVDS Encrypt/PT LVDS Tx PWR On/Off Cmd 28V Pulsed CMD Primary/Secondary Cmd Bi-Level AES Encrypt/Bypass Cmd Bi-Level Serial CMDs Open Collector - Reed-Solomon Encode/Bypass - Randomize Encode/Bypass - Playback Enable (Data)/Disable (PN) - NRZ-L to M Encode/Bypass - RF Power Adjust - AES Key Upload Operating Modes OQPSK (200 Mbps per channel) - I Data and Clock - 4 bit word (50 Mbps) - Q Data and Clock - 4 bit word (50 Mbps) Internally Generated Pseudorandom Test Pattern Power Requirements Input Voltage Input Power +28 +/- 7 Vdc 75 Watts (max.) Radiation Total Dose Latch-up 60 krad minimum Immune Environmental Specifications Temperature Vibration -30°C to +70°C (non-operating) -20°C to +65°C (operating) Random; 14.1 grms, 3-axis Physical Footprint Weight 6.8” (W) x 6.1” (D) x 4.75” (H) 8.5 lbs. X-Band Transmitter - Mechanical Outline Connectors RF- Female SMA according to MIL-C-39012 9 pin Filtered D-Sub for Power 15 pin High Density D-Sub for Telemetry 15 pin D-Sub for Command and Telemetry 44 pin High Density D-Sub for Primary Signals 44 pin High Density D-Sub for Secondary Signals Output Characteristics RF Out RF Frequency Frequency Source 7.5 Watts (adjustable in 0.5 dB increments) X-Band, 8.0 to 8.4 GHz (selectable; factory preset) Low Phase Noise Internal TCXO 0-5V Analog 0-5V Analog Thermistor Open Collector RF Power TLM Secondary V TLM Temperature TLM Serial TLMs - Primary/Secondary - Reed-Solomon Encode/Bypass - Randomize Encode/Bypass - Playback Enable/Disable - NRZ-L to M Encode/Bypass Reproduced Clock (I and Q) LVDS RS Enable LVDS Space Electronics ~ 7500 Innovation Way ~ Mason, Ohio 45040-9699 U.S.A. Tel: 1-513-573-6994 ~ Fax: 513-573-6767 ~ Visit our web site at www.L-3com.com/CE~ e-mail: [email protected] Cleared by DOD/OSR for public release under 07-S-1073 on June 11, 2007