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Overview:
QPSK modulator is one of the main equipment of cable digital TV headend, receiving data from the encoder, multiplexer, DVB gateway, scrambler, video server and other equipment of the DVB transport stream, make RS coding, convolution interleaving and QPSK modulation channel processing, and provide RF output.
Features
. Comply with DVB standard channel coding;
. Support the full range of the variable symbol rate;
. 8M cache, anti-burst stream;
. Auto-filled streams filling and intelligent Null Packet removed;
. PCR correction;
. Local and remote control;
. LCD display in English, easy and flexible to operate;
Technical Specification:
|
Modulation Mode |
QPSK |
|
|
Symbol rate |
1~45Mbaud/s |
|
|
Error-correcting codes |
RS code188/204 |
|
|
Input bit rate |
1.0~108Mbps |
|
|
Channel Data Rate |
1~56Mbps |
|
|
MER |
>32dB |
|
|
Input interface |
ASI (DVB standard) |
|
|
RF Frequency |
450~950MHz (or 950-2150) |
|
|
Output LEV |
>=0dBmw |
|
|
Output LEV adjustable range |
0-16 dB(0.5 dB stepping) |
|
|
Impedance |
75Ω |
|
|
Output Return Loss |
>=12 dB |
|
|
General Features |
Size |
44mm*482*410mm |
|
Environment |
0 ~ 45(Operating);-20 ~ 80(Storage) |
|
|
Power |
220VAC±10%,50Hz,25W |
|
Network Management:
QPSK Modulator parameter
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