WDQ-3244 4 in 1 QAM is a new compact (1RU only) chassis and cost-effective QAM modulator, which is designed by Hangzhou Prevail according to the DVB related standards. This device is integrated up to 4 channel QAM modulating carrier outputs, in which each carrier has independent signal channel encoding and direct RF output. Hence, one PCS 4 in 1 QAM modulator can work as 4 standalone QAM modulators, significantly reducing the network operators' head-end cost. WDQ-3244 has 4 ASI input, RF output and RF testing output. The WDQ-3244 has very convenient and friendly management interface, the user can complete all operation via local keyboard and LCD display on device, or access through the Ethernet port on device.
4 adjacent channel QAM carrier
4 ASI inputs始坝，TS packet format input automatic detection (188 or 204 bytes)
RF output power 90~100dBuV (with 0~10dB adjustable attenuation range) and 48~863MHz frequency range
16~256QAM modulation modes
Provide RF output monitoring port (-20dB)
Adjustable Symbol Rate： 5 to 7Mbaud
PSI/SI tables synchronization update
Excellent RF output performance, MER≥40dB
Memory protection for power-fail
Local keyboard control and LCD display, or access via Ethernet link
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Parameter |
Symbol |
Description |
Unit |
Remark |
|
Mechanical dimension |
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|
Height |
H |
42 |
mm |
About 1U |
|
Width |
W |
434 |
mm |
About 17” |
|
Depth |
D |
340 |
mm |
|
|
ASI Input |
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|
Number of ASI input |
- |
4 |
|
|
|
Impedance |
- |
75 |
W |
|
|
Connector |
- |
BNC |
NA |
|
|
TS packet format |
- |
188 or 204 |
Byte |
Automatic detection |
|
Transmission format |
- |
Data packet |
NA |
|
|
RF Output |
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|
Impedance |
- |
75 |
W |
|
|
Connector |
- |
BNC |
NA |
|
|
Frequency |
- |
48~863 |
MHz |
|
|
Output level |
- |
90～100 |
dBuV |
Adjustable attenuation of 0~10dB |
|
Modulation Specification |
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|
Modulation scheme |
- |
16/32/64/128/256QAM |
NA |
|
|
Symbol Rate |
SR |
5≤SR≤7 |
Mbaud |
|
|
Bandwidth |
BW |
≤8 |
MHz |
|
|
Modulation Error Rate |
MER |
≥40 |
dB |
After equalizer, 64QAM |
|
Bit Error Rate |
BER |
≤1x10E-8 |
|
After FEC, 64QAM |
|
Carrier to Noise |
C/N |
≥45 |
dB |
|
|
Carrier suppression |
- |
≥58 |
dB |
|
|
Phase noise |
- |
@10KHz≤-80dBc/Hz昨浆，@100KHz≤-100dBc/Hz |
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