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Chapter 14 – Optical Receiver (Option) 63
10911 V01.10
power, the RF voltage after the optical receiver increases by 6dB. This means that the OMI and RF voltage are linearly
proportional to one another.
14.6 Remote supply
An optical LNB can be supplied with a voltage of 14 V and max. 500 mA using the F connector. For Invarcom FibreMDU
and equivalent products, you can use a 14 V supply.
14.7 Cleaning the bre optic plug connection
The weak point of every optical transmission system lies in the splice and plug connections. For plug connections, it is
important to ensure that the contact surfaces are very clean.
But the ferrules of a fibre optic connection must also remain free of dust so that no contamination reaches the con-
nectors’ interfaces when they are plugged in. Industry-standard cleaning sets are available for this purpose. Immedia-
tely after cleaning the plugs and connections, you should put dust covers on them unless you are going to use them
again right away.
The measuring device’s fibre optic connection is equipped with a hinged lid that seals the connection as soon as the
plug is removed. However, you must still ensure that the area around the lid remains free of contamination.
14.8 USB Microskope
A USB microscope can be connected to the device for plug connector inspection. The device supports DI-1000 type
USB microscopes from Lightel Technologies.
Contamination in optical plug connections can impair the signal quality. Typical types of contamination include dust
particles, hand lotion, skin and alcohol residues.
Summary of Contents for VAROS109
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