The DCH-3000TM DVB QAM Modulator, which combines QPSK demodulator, DS3 adapter(optional), DVB TS PID Filter and digital cable QAM (DVB-C) modulator in a single unit. It supports 4 input modes, including QPSK signal from satellite, DS3 signal from HFC system, ASI and SPI (LVDS) input, and then transmodulates the input signal to digital QAM signal. It also supports 3 output modes, including DVB-ASI output, RF output and DS3 (optional) output. PBI DCH-3000TM adapts Ethernet WEB Management interface complying with HTTP protocol, which allows real-time status monitoring and control. It can obtain the PSI/SI information coming from each input port and multiplex them up to 1 TS with PCR Error Correction.
DCH-3000TM can also be called Multi-protocol TS Processor and QAM transmodulator. It is mainly applied to transmitting DVB-C signal in HFC, MMDS and MUDS systems.
Features
* Fully comply with DVB-S / ETSI 300421 and DVB-C / ETSI 300429 standard
* PBI Ethernet WEB Management Interface (Compatible with SNMP)
* Fully comply with the CATV professional design
* QPSK, ASI, SPI, DS3 (optional) input mode supported
* QPSK, ASI, SPI, DS3 (optional) loop through output
* DVB TS processing and re-multiplexing
* TS frequency range: 1 Mbit/s~54 Mbit/s
* The QAM modulation chosen among 16, 32, 64, 128 and 256 level numbers
* QAM symbol rate: 3.5~7.10 Bauds
* Output full frequency (48~860 MHz) RF CATV signal
* RF signal output level: 100~113 dB (adjustable)
* User friendly operation interface through LCD monitor
* Automatic last channel memory
* Store up to 99 channel parameters
* 1U, 19" standard rack installation
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Specifications
DS3 Input |
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Input impedance |
75Ω |
Input Connector |
BNC |
Max Input Bit-rate |
44.736 Mbit/s |
Format |
Unframed or framed Framing according to G.804 / G.752 (DS3) |
DS3 Loop through output |
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Output Impedance |
75Ω |
Max Output Bit-rate |
44.736 Mbit/s |
Output Connector |
BNC |
Format |
Unframed or framed Framing according to G.804 / G.752 (DS3) |
QPSK Demodulator |
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Input Frequency Range |
950~2150 MHz |
Input level |
-25 ~ -65 dBm |
Input impedance |
75Ω |
Connector |
F connector |
Symbol rate |
2~45 MBauds |
Rolling Off Factor |
0.35 |
Punctured Rates |
1/2,2/3,3/4,5/6,7/8 |
De-Interleaving |
I=12 |
Polarization Selection |
0/13V/18V Switch |
Hi Band Low Band Selection |
0/22 KHz ON/OFF Switch |
QAM Modulator |
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Modulation |
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Input Bit rate |
1 ～ 7Mbps (PAL), 1 ～ 6Mbps (NTSC) |
QAM mode |
16, 32, 64, 128, 256 QAM |
Bandwidth |
6 MHz, 7 MHz or 8 MHz |
FEC code rate |
1/2, 2/3, 3/4, 5/6, 7/8; K=7 |
Input Bit rate |
1 ～ 7Mbps (PAL), 1 ～ 6Mbps (NTSC) |
Iutput |
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Iutput Frequency |
50 ～ 860MHz |
Input Level |
-15 ～ 15dBmV |
Input Impedance |
75Ω, F-type |
RF connection |
75Ω, F connector |
Out put level |
100~113 dB adjustable |
RF Harmonics and Spurious |
>60dBc |
Output return loss |
=14Db |
Input TS |
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ASI |
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Connector |
75Ω ， BNC |
Data Rate |
270 Mb/s |
Available Bit Rate |
1M~54Mb/s |
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