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5.7 Test the optical output signal
After the input signal has been confirmed, the optical power of the associated optical output port should be tested.
Use the optical power meter to test the output levels; the output values should be in accordance with the technical
specifications. Before testing, the optical power meter must be calibrated. Before measuring optical signals, verify the
interfaces are clean and undamaged.
CAUTION:
The device output optical power measurement procedure and regular maintenance
must be performed by highly trained personnel. In any case, they must be aware
of and comply with the following warnings associated with FT5S optical
transmitter module:
WARNING:
Module emits an invisible laser when working. Avoid direct contact with laser.
Do not look directly at the fibre connector. connector. Do not look directly at the
fiber connector.
5.8 RT5S initial setup
1.
After calculating the correct RF per channel drive level for the channel plan to be used for BC only or BC and NC. See following
formula in section 6.1.1. Confirm RF channel level only on the BC RF input lead or BC and NC RF input leads and connect both
to the chassis (pictured below).
Note: if narrowcast is not in use install an "F" 75 Ω terminator to the NC RF input connection.
2.
Before installing FT5S, check output optical ferrule tip with a fibre scope to ensure that the connector is clean as shown
in following screen shot of clean optical connector. The cap on the optical output connector does not prevent contamination
from getting on to the optical connector, it prevents laser from being emitted when laser is on and no optical patch cord
is installed.
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