Emposat - Baseband Equipment

• Center frequency of uplink and downlink signals: 70MHz, 140MHz, 300MHz or S-band; • Up and down signal amplitude: -10dBm～-70dBm; • Beacon capture time ≤1s, distance capture time ≤15s; • Telemetry despreading and demodulation loss: ≤2.5dB; • Random error of ranging: ≤11.7m; • Random difference in speed measurement: ≤4cm/s; • The telemetry format synchronization mode supports inverted code, cyclic code, ID counting identifier; • With automatic test functions such as capture time, speed and range error, telemetry bit error rate, and remote control ringlet confidence. • The remote control supports continueous and non-continueous working modes, and the remote control commands support multiple command formats such as data injection, coding commands and pulse trains, and have the function of remote control ring comparison; • The telemetry (including analog sources) supports the functions of descrambling, Viterbi, R-S encoding and decoding, and the data format adapts to PCM telemetry standards and CCSDS data format standards;

• Supports modulation and demodulation of 1 to 4 channels incoherent (coherent) spread spectrum remote control, telemetry and measurement; • Center frequency of uplink and downlink signals: 70MHz, 140MHz, 300MHz or S-band; • Up and down signal amplitude: -10dBm～-70dBm; • Spreading code rate: 1.023Mcps×n (n=1, 2, 3……10); • Capture time: ≤ 2s; • Telemetry despreading and demodulation loss: ≤2.5dB; • Random error of ranging: ≤0.8m; • Random difference in speed measurement: ≤1.6cm/s; • The remote control supports continueous and non-continueous working modes, and the remote control commands support multiple command formats such as data injection, coding commands and pulse trains, and have the function of remote control ring comparison; • The telemetry (including analog sources) supports the functions of descrambling, Viterbi, R-S encoding and decoding, and the data format adapts to PCM telemetry standards and CCSDS data format standards; • The telemetry format synchronization mode supports inverted code, cyclic code, ID counting identifier; • With automatic test functions such as capture time, speed and range error, telemetry bit error rate, and remote control ringlet confidence.

• Supports the remote control, telemetry and measurement functions of the integrated measurement and control system of 1 to 4 channels of measurement, control and data transmission; • Center frequency of uplink and downlink signals: 70MHz, 140MHz, 300MHz or S-band; • Up and down signal amplitude: -10dBm～-70dBm; • Uplink spreading code rate: 1.023Mcps×n (n=1, 2, 3……10); • Downlink data transmission information rate supports 262.272Kbps, 524.544Kbps, 1.049088Mbps, 2.098176 Mbps, 4.196352 Mbps, 6.294538 Mbps, 8.220672 Mbps, 10.960896 Mbps; • Capture time: ≤ 1s; • Telemetry demodulation loss: ≤1.5dB; • Random error of ranging: ≤1 m; • Random difference in speed measurement: ≤2cm/s; • The remote control supports continueous and non-continueous working modes, and the remote control commands support multiple command formats such as data injection, coding commands and pulse trains, and have the function of remote control ring comparison; • The data transmission demodulation (including analog source) supports adding descrambling, code conversion, Turbo, LDPC encoding and decoding functions, the data format adapts to the PCM telemetry standard and the data format standard of CCSDS; • The telemetry format synchronization mode supports inverted code, cyclic code, ID counting identifier; • With automatic test functions such as capture time, speed and range error, telemetry bit error rate, and remote control ringlet confidence.

• Demodulation method and bit rate: BPSK: 10kbit/s～10Mbit/s; • QPSK/DQPSK/OQPSK: 10kbit/s～20Mbit/s; • Demodulation loss: ≤2.0dB; • Input frequency: 70MHz/140 MHz, S band, etc.; • Input signal range: -70～-10dBm; • Carrier capture range: ≥±1MHz; • Capture time: ≤1s; • PCM code type: NRZ-L/M/S; • Gray decoding: supports eight methods of Gray0～Gray7; • Channel decoding: Viterbi decoding: Rate=1/2,3/4; RS decoding: (255,223), (255,239), regular basis and dual basis are optional, interleaving depth is 1～5; Viterbi decoding and RS Concatenated code decoding; LDPC (7/8) decoding; • Frame synchronization: frame synchronization code: length 2 bytes to 4 bytes, each byte is variable; •Frame length: 8～1024 bytes; • De-scrambling: Supports the de-scrambling method of the CCSDS standard, and the initial phase and polynomial of the de-scrambling can be set.

• Input center frequency: 70MHz; • Modulation system: PCM-FM; • Code rate: 10kbit/s～10Mbit/s; • Dynamic Doppler range: -180kHz～180kHz; Doppler change rate range: -15kHz/s～15kHz/s; • AGC control range: 60dB; • AGC time constant: 1ms, 10ms, 100ms, 1000ms; • AGC control accuracy: 1dB; • Capture time: ≤0.1s; • Possesses TPC decoding capability; • With MSD multi-symbol detection capability; • Possesses the ability of LHCP and RHCP synthesis; • Frame synchronization code group: 8bit～32bit, continuously variable; • Sub-frame synchronization: ID sub-frame synchronization, cyclic sub-frame synchronization, inverted sub-frame synchronization; • Frame length: 4～1024 words long; • Sub-frame: 4～256 frames; • Maximum cycle without symbol turnover: 128 symbol cycles; • Bit error rate: Eb/N0 worse than the theoretical value ≤ 2dB.