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Specifications
1.Meet the modulating standard of DVB-S ETS 300~421QPSK;2.Frequency output range: 450MHz~950MHz;
3...
Description
QPSK Modulator
Brief introduction
JD-QPSK-1100 QPSK modulator meets the DVB-S channel encoding and modulating standard. The advanced digital signal processed technology is adopted to transmit TV signal TS (the signal compressed and encoded through MPEG-2 and after crossover and processing with other data stream) to QPSK modulator to process QPSK channel coding and modulating, supplied with medium-frequency output or RF (fixed or frequency agility)output.
JD-QPSK-1100 QPSK modulator adopts random process for energy dispersal, RS coding, convolution interleaving, contracting convolution coding, and base band shaping process before modulating, to guarantee the reliable transmission performance and stability.
Features
- Meet the modulating standard of DVB-S ETS 300~421QPSK
- Frequency output range: 450MHz~950MHz
- Internally installed with frequency synthesizer, support variable frequency 450MHz~950MHz within L frequency range
- RF are fixable or frequency agility output
- Supply with RF output monitoring port (-30dB)
- Supply with DVB ASI/SPI input interface and looping out interface, with reliable performance and strong anti-jamming ability
- Front panel LCD shows key control parameters and controls operation, with Chinese and English menu selection
- LED status display and warning indication (warning for input code rate unlocked and data spilling)
- Support 10M/100M Ethernet control interface, and shall upgrade on line through network
- Local/long-distance control and central management are available through network management system
- 19” 1U standard rack structure
Technical parameters
Modulation |
QPSK |
Input interface |
ASI (BNC-75Ω) |
Output interface |
F type interface (75Ω) |
RF output range |
450~950MHz |
Output signal bandwidth range |
≤56 MHz |
Symbol rate |
2~45MBauds |
FEC encoder |
1/2, 2/3, 3/4, 5/6, 7/8 |
RS encoder |
(204/188) .7=8 |
SNR |
≥45dB |
Channel encoding standard |
In accordance with the DVB-S Standard |
Output level |
≥0dBm |
Output level range |
0~20dB(0.5dB stepping) |
Power supply |
220V(180V~250V), 50Hz~60Hz, 20VA |
Size |
44mm×482mm×430mm(H×W×D) |
Installment pitch of holes |
460mm |
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