FMUSER INTERNATIONAL GROUP INC.
广州市汉婷生物技术开发有限公司
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4.2.2.1 Frequency
The RF output range is from 48MHz~1000MHz.
4.2.2.2 Modulate Mode
By pressing “1.2 Modulate Mode”, user can choose the standard of QAM
modulation as shown below:
4.2.2.3 Constellation
By pressing “1.3 Constellation” to enter the QAM modulation mode selection,
ENTER to the specified setting. The display shows as below:
Three different constellations: J.83A (DVB-C), J.83B, J.83C will show on the LCD
window when Constellation been entered.
J.83A (DVB-C) contains 16QAM, 32QAM, 64QAM, 128QAM, and 256QAM;
J.83B contains 64QAM, 256QAM;
J.83C contains 64QAM, 256QAM.
Note: The more advanced QAM constellation mode, the higher transmission
efficiency and TS coding rate which the device can transport at the same symbol
rate. Accordingly, with the TS coding rate increasing, the signals’ anti-jamming
capability will become weaker. What needs to be pointed out is, the effective
1.1.1
Frequency
586.00 MHz
1.3 Constellation J.83A (DVB-C)
64QAM
1.3 Constellation J.83A (DVB-C)
64QAM
►
1.5 Bandwidth
1.6 RF Level
1.2. Modulate Standard
[J.83A/DVB-C] J.83B J.83C
