Promax HD Ranger + Uživatelský manuál stáhnout pdf (Strana 12)

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LTE interference

LTE interference on SMATV systems

Minimizing LTE effect on your TV system

The HD RANGER 2 has a variety of tools to compare the signal

reception quality measurements on digital TV channels with

and without the LTE filter. This is very helpful to anticipate the

performance improvement you should expect on your TV distribution

system well before you physically make changes to the cabling to

insert the LTE filter.

LTE interference on CATV networks

Locating interference sources to prevent service calls

Some of the bands allocated to LTE are near or inside former television bands. For example band 5 (uplink 824-849 MHz;

downlink 869-894 MHz). The

HD RANGER 2 has special functions to help installers determine the level of activity in those bands and

therefore anticipate potential interference problems.

Downlink and Uplink interference

Visualising the two different scenarios

Downlink interference comes from the mobile phone base stations which are placed at fixed locations and are always on. This is not

the case of Uplink interference which comes from the handheld devices and therefore it can be a lot more difficult to locate

and mitigate.

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Promax HD Ranger + Uživatelský manuál Strana 12