China CATV Digital Head-End DVB-T Modulator (WDQ-3300), Find details about China Qam Modulator, Modulator from CATV Digital Head-End DVB-T Modulator (WDQ-3300)
Parameter | Symbol | Description | Unit | Remark |
Mechanical dimension | ||||
Height | H | 42 | mm | About 1U |
Width | W | 434 | mm | About 17" |
Depth | D | 340 | mm | |
ASI Input (with loopout ) | ||||
Number of ASI input | - | 1 | ||
Impedance | - | 75 | W | |
Connector | - | BNC | NA | |
Maximum bit rate | - | 108 | Mbps | |
TS packet format | - | 188 or 204 | Byte | Automatic detection |
Transmission format | - | Data packet or data burst | NA | |
SPI Input | ||||
Number of SPI input | - | 1 | NA | |
Connector | - | DB-25 female | NA | |
Packet format | - | 188 or 204 | Byte | without channel coding |
Maximum bit rate | - | 108 | Mbps | LVDS mode |
E3/DS3 Input(options, with loopout) | ||||
Number of E3/DS3 input | - | 1 | NA | G.703 standard |
Impedance | - | 75 | W | |
Connector | - | BNC | NA | |
TS packet format | - | 188 or 204 | Byte | |
Data bit rate | - | E3/DS3(34.368/44.736) | Mbps | |
10MHz Clock Reference | ||||
Internal Stability | - | 0.1 | ppm | |
External Impedance | - | 50 | W | |
External Connector | - | BNC | NA | |
External Input level | 55~70 | dBuV | ||
RF Output(with -20dB test output) | ||||
Impedance | - | 75 | W | |
Connector | - | BNC | NA | |
Frequency | - | 48~860 | MHz | |
Output level | - | 100~115.5 | dBuV | Step:0.5 dBuV |
Modulation Specification | ||||
Modulation scheme | - | QPSK,16,64QAM | ||
FEC | - | 1/2,2/3,3/4,5/6,7/8 | ||
Guard Interval | - | 1/4,1/8,1/16,1/32 | ||
RS encode | - | 204byte mode | ||
IFFT | - | 2K/8K | ||
Modulation Error Rate | MER | ≥40 | dB | |
Signal to noise ratio | SNR | ≥50 | dB | |
Bit Error Rate | BER | ≥9x10E-9 |