L Band Burst-Mode PSK Modem

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L Band Burst-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 - 6 GHz 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 1 KHz
3 I/P Frequency Acquisition Range ± 5 KHz
4 I/P Level Range -70 to 0 dBm
5 O/P RF Level Range -10 dBm Max
6 I/P Impedance 50 Ω
7 I/P Spectrum Selection Normal, Inverted
8 Data Rate Programmable up to 40 Msymbols/s
9 Modulation BPSK, QPSK
10 FEC Encoding R = 1/2, K = 7
G1 = 1718, G2 = 1338
11 FEC Decoding K = 9, rate 1/2 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, 100 ms 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 Symbols
18 Clock Recovery Symbols 64 Symbols
19 M & C Control Ethernet TCP/IP
20 Dataport Ethernet TCP/IP or UDP
21 Power Supply 12V DC 3A
22 Mechanical Standard 19” Rack Mountable
 
     
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