December 2014
63
A5.4
Selective optical to RF converter
A5.4.1
Description
The selective optical to
RF
converter has a filter that separates each wavelength
and directs it to an independent circuit with a photosensor, which obtains the
RF
signal that carries. The
RF
signal obtained for each wavelength passes to a band
switch.
The band switch receives a signal and converts it to a frequency within the
RF
band (65 — 2150 MHz). In the case of a terrestrial / cable signal the signal is not
converted since that signal is within the
RF
range. After the conversion, the
RF
signal output is connected to the analyser input connector and the measurement
is performed in the usual way to an
RF
signal. In the conversion, bear in mind
that for every unit of optical attenuation (one dB), occurs two dBs of power loss
in
RF
. As an example, every 3 dB of optical attenuation for each splitter are
equivalent to 6 dB of power loss for RF.
Summary of Contents for HD Ranger +
Page 1: ...HD RANGER TV SATELLITE ANALYSER 0 MI1914...
Page 15: ...December 2014 2 7 2 3 Equipment Details Front View Figure 4...
Page 16: ...2 8 December 2014 Lateral view Figure 5 Top view Figure 6 Optical Option Refer to annex...
Page 22: ...2 14 December 2014 INSTALLATIONS MANAGEMENT PREFERENCES MENU Figure 7...
