Introduction
This guide explains how to install a SIRCH in a existing cable network. You should be
familiar with cable TV systems. Some of the operations described by this guide could
disrupt the entire cable TV system if performed improperly.
You must have the permission and authorization of the cable TV system operator before you
begin the installation.
Installation Tools and Verification Equipments
The following equipment is required during initial system set up and installation:
Flash light
Power extension cords/strips
Multimeter (Ohm meter/volt meter)
75 Ohm Attenuators (various values, i.e., 3, 6, 10 dB)
Splitters, directional couplers (single port, multi-port, various values) Coaxial
cables (various lengths)
Spectrum analyzer or power meter and tone generator Instruments such as the
spectrum analyzer, power meter and tone generator may be used to create and
measure signals, signal levels and operating frequencies.
Installation Process
1.
Mount SIRCH in rack and connect keyboard/mouse/monitor. Connect AC power to
monitor and SIRCH.
2.
Power on monitor and SIRCH, and wait until boot up.
3.
Select SIRCH channel or frequency. It is recommended to either stay with default
of 87 (TV default), or select a lower channel to avoid the greater signal
attenuation which occurs at higher frequencies (Selecting a channel other than 87
will require manually resetting the TV’s SIRCH channel to match with TV setting).
4.
Set the SIRCH to playback a video stream for system testing and balancing.
5.
Measure the levels of the adjacent channels and match the SIRCH output level to
those, but not lower than the signal level required to present -5 dBmV in every
room, using RF attenuator pads. (As previously stated, an amplifier could be
required depending on system configuration.)
6.
Use an open input port, if available to inject the SIRCH signal into the
distribution system, (use an external combiner if no input port available) and
double-check that SIRCH signal level is matched well with adjacent channels, but
is not less than -5 dBmV at every room.