Author: RRi
Page - 35 -
Version 1.0
Date: 10-2019
BLANKOM-IPQAM-801_User_Manual_ENv1.0.docx
IPQAM-801 DVB-C A/C Modulator IP to QAM User Manual
Signal dB might be too high – please use attenuators and screw down the level:
here we have already -20dB…
A CATV measurement instrument /spectrum analyser might be very necessary.
TV sets are feeling well if the QAM RF level input would be not more than 75-80 dBµv.
The Unit is transmitting at the output more than 110dBµV so you should attenuate if you have not soo ,long
distances by Coax and notz so much splitters in that.
Higher frequencies will have higher attenuation over Coax cables … so called SLOPE.
So for a better linear transmitting: use lower frequencies in around 300 MHz (compatible to Docsis 3.1
Internet gateway channels over CATV networks).
