MULTIMISSION DIGITAL DEMODULATOR & BIT SYNCHRONIZER
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Jisnu Model No: JC-SC-DB11 is a Multi-mission Digital Demodulator & Bit synchronizer is suitable to handle QPSK modulated signal with data rates up to 105 MBPS on a 375 / 720 MHz carrier with a dynamic range of 50 dB ranging from 0 to –50dBm. This high precision equipment demodulates the satellite data and provides Serial Data (I+Q) & Serial Clock with a minimal BER of 1x10-6 at better than 13 dB Eb/No. This unit also provides Parallel Data (I & Q separately) and Clock for monitoring purpose.
The carrier generation is done by implementing digital costas loop using the latest FPGAs.The Bit Synchronizer section accepts I & Q base band data from QPSK Demodulator and regenerates Coherent Clock at bit rate. This system is suitable for remote sensing applications.
| SPECIFICATIONS | |
|---|---|
| Carrier Frequency* | : 375 / 720 MHz |
| Modulation | : QPSK |
| Input Dynamic Range* | : 0 to –50 dBm |
| Input Acquisition Range* | : +/- 400 KHz |
| Input Tracking Range* | : +/- 500 KHz |
| Max. Input Power | : +2 dBm |
| Data Rates* | |
| Demodulator | : up to 105 Mbps |
| Bit-synchronizer | : up to 105 Mbps |
| Acquisition Time | : < 300 ms |
| Doppler Rate | : 3 KHz/sec |
| Differential Decoding | : 00,01,10,11 |
| Output Code | : NRZ-L |
| Output Clock Duty Cycle | : 50% + 10% |
| Outputs | : Demodulated I & Q Data, VCO Monitoring, I & Q Data with Parallel Clock & Serial Data with Clock All outputs are TTL Un-terminated (ECL Optional) |
| Output Level | :300 mV p-p min. in I & Q |
| Continuous Clock | : Clock in the absence of Data |
| BER | :Better than 1x10-6 at 13 dB EB/No |
| Input Connector | : N-type Female |
| Output Connectors | :BNC (F) |
| Input/Output Impedance | : 50 ohms |
| Remote Interface* | :RS232 or IEEE488 or Ethernet |
| Power | : 230V AC 50Hz |
| Size | :19” Rack Mountable |