¡ö Quad QPSK-to-QAM Transmodulator CM3014
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| Brief Introduction
Model CM3014 is a quad QPSK-to-QAM transmodulator station designed for such application that combination with local CATV signal is necessary.
The device accepts up to four DVB-S/S2 satellite inputs, and completes QPSK demodulation + QAM modulation. Accordingly, CM3014 uses maximum 4 QAM TPs. A 4-way combiner embedded in CM3014 mixes RF signals from QAM TPs as one. The Mixed RF has a tuning range of 0~5dB in level. However, each QAM TP’s RF level could be adjusted independently too.
A 2-way combiner is built after the 4-way combiner. The 2-way combiner mixes local CATV RF (47~862MHz) with QAM signal (470~862MHz). The overall RF output of CM3014 has a tuning range of 0~32dB in level.
CM3014 is built in Aluminum housing with four oval holes for wall mounting. The RS-232 port allows connection to PC to configure parameters, making installation and maintenance convenient and easy.
Block Diagram
Product Features
- Accepts up to 4 DVB-S/S2 inputs.
- QAM RF output frequency adjustable (470~862MHz, 8MHz per band).
- QAM RF output level can be tuned together or independently.
- Embedded with a 2-way combiner to mix with local CATV RF.
- Overall RF output has a tuning range of 0~32dB in level.
- RS232 port for parameter configuration.
- Aluminum housing for wall mounting.
- AC 110~220V/50~60Hz power supply.
- Compact size and light weight --Dimensions: 37.0 × 20.0 × 6.5 cm Net Weight: 2.3 kgs.
DVB-S/S2 Input |
Modulation Type |
DVB-S/DVB-S2 |
Frequency Range |
950~2150 MHz |
Symbol Rate |
2~45 Msym/s |
Input Level |
-65~-25 dBm |
QAM Modulation |
Constellation |
64/256 QAM |
QAM Output Frequency |
470~862 MHz |
Symbol Rate |
3.6~7.0 Msym/s |
RF Level Tuning Range |
5 dB, for every QAM TP’s RF output. |
MER |
≥37 dB |
Out-Band Parasite Suppression |
≤-60 dBc |
In-Band Parasite Suppression
(¡÷B=8MHz) |
≤-65 dBc |
Overall RF Output |
Frequency Range |
47~862 MHz |
Maximum Output Level |
≥110 dBuV |
RF Level Tuning Range |
32 dB |
Output Return Loss |
≥10 dB |
Noise Figure |
≤7dB |
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