Before Installation
■ Choose Output Frequency for Modulator Output
• Modulated output frequency can be any existing channel frequency available from local Channel Plan.
• Depending on the modulation technique of over-the-air broadcasting TV or Cable TV used in the area,
refer to the corresponding appendix for Channel Plan information.
• Select an unused or an unimportant channel from the Channel Plan as output frequency of Modulator
output.
• If Modulator output frequency is unsure
◊ Pick a frequency between channel gap, make sure it’s 6 MHz or 8 MHz away from the previous and
the next channels.
◊ Use the recommended frequency indicated on the corresponding Channel Plan appendix.
◊ Use the default frequency selected by the Modulator.
• Modulated output frequency and channel number can be configured from the LCD menu or Web
configuration page.
• Follow the instructions of this Start Guide to set up output frequency and channel number to watch
Modulator output video on TV.
• If TV needs to learn the Modulator output channel by auto/manual channel rescan. Refer to the
User Guide of TV to practice the rescan for channel detection of Modulator output.
■ Combining (Cable) TV Signals from Service Provider (e.g. Comcast)
• In order to combine the existing TV broadcasting channels from Service Provider, it’s necessary to
select an output frequency and output channel for Modulator output. The channel information of
local over-the-air broadcasting or local Cable TV service can normally be found online or from
the channel listing provided by Service Provider.
• For business installers, a spectrum analyzer up to 1 GHz can be helpful to make the installation
easier and faster although it’s not mandatory.
• If the Modulator output is going to feed a Digital Cable Converter box or a set-top box, some Service
Providers offer a dedicated channel (and frequency) for modulated video and some Service Providers
may need a specific PID to be configured by the Modulator for MPEG streams to be recognized by the
set-top box. Refer to the section of MPEG Transport Stream Parameters for PID setup.
• If the output power level of the Modulator is too high, it may oversaturate the TV signals delivered
by Service Providers. It’ necessary to lower the output power level or use an attenuator to reduce
oversaturation.
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MX-100R, MX-200 and MX-300 HD Modulator