Contemporary Research QMOD-YPB 2 Manuale di installazione - Pagina 11
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Stampa la paginaRF Design
A good goal of a properly designed RF system is to deliver about 5-10 dBmV to each TV. In general, most TVs will easily tune a digital QAM
channel with a level between -10 and +10 dBmV. Below is an example RF distribution network using readily available RF splitters that will sup-
port up to 32 TVs.
Each 4-way splitter has a loss of 7dB on each output. Each 8-way splitter has a loss of 10.5 dB on each output. The loss starts to gradually
increase a little more above channel 65 but should not be a factor if the cable runs are less than 150 to 200 feet.
For the example below to work correctly, the RF level of the QMOD devices in the Venue Vizion system will need to be set to 25 dBmV. Refer to
the instructions on previous page for modifying the RF level.
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