L Band continuous-mode PSK Modem

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L Band continuous-mode PSK Modem

Modem Features:

  • BPSK/QPSK Modulation.
  • Programmable symbol rate, up to 40 MSymbols/s
  • Convolutional or Turbo code error correction.
  • Nominal frequency of operation: 70 MHz - 6GHz for direct connection to external LNB or BUC.
  • Burst mode operation
    • Programmable fixed-length data frames from/to LAN/UDP ports
    • Multiple frames transmitted efficiently with only 44-symbol separation
    • Acquisition: 94-symbol preamble
  • Large frequency acquisition range: £20% of symbol rate
  • Programmable symbol rate up to 40 MSymbols/s
  • Supply voltage: 12VDC with reverse voltage and surge protection.
  • Frequency reference: internal TCXO or input for an external, higher-stability 10 MHz frequency reference
  • Built-in tools: PRBS-11 pseudo-random test sequence, BER tester, AWGN generator, internal loopback mode.
  • Monitoring:
    • Carrier frequency error
    • SNR
    • BER

Technical Specification

S. No. Parameter Specification
1. IF Frequency 950 MHz to 2150 MHz
2. Frequency Tuning Step 1KHz
3. I/P Frequency Acquisition Range ± 5KHz
4. I/P Level Range -70 to 0 dBm
5. O/P RF Level Range -10dBm Max
6. I/P Impedance 50Ω
7. I/P Spectrum Selection Normal, Inverted
8. Data Rate Programmable up to 40Msymbols/s
9. Modulation BPSK, QPSK
10. FEC Encoding R=1/2, K=7 G1=1718, G2=1338
11. FEC Decoding K=9 rate ½ convolutional code with zero tail bits
12. Turbo Code Encoder Rate Rate 1/3, 1/2, 2/3, 3/4, 4/5, 5/6, 6/7, 7/8
13. Turbo Code Decoder Rate Rate 1/3, 1/2, 2/3, 3/4, 4/5, 5/6, 6/7, 7/8
14. Input Selection From UDP or TCP/IP
Internal pseudo-random test sequence, 100ms repetition
Internal pseudo-random test sequence continuous transmission
Unmodulated test mode (carrier only)
15. Phase Ambiguity By UW (64 bit programmable)
16. Eb/No Min for Operation 5.0 dB
17. Carrier Recovery Symbols 192 Symbol
18. Clock Recovery Symbols 64 Symbol
19. M & C Control Ethernet TCP/IP
20. Dataport Ethernet TCP/IP or UDP
21. Power Supply 12V DC
22. Mechanical Standard 19” Rack Mountable
 
     
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