Kurth KE301 - Page 29

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NLP signal is transmitted every 4 seconds. This is indicates on the ET with a
change in the blinking of the DATA LED and at the ET720/ET800 with a tone
sequence. With the most common hubs, switches, or routers, the LINK LED
belongingtotheportisswitchedonando󰀨intimewiththesignal
2
. This way,
theportassociatedwiththenetworksocketcanbeidentied.
4. Finding and Testing Fiber Optic (FO) Cables (ET800 only)
Theberoptictestusesalaserlightsourcewithvisibleredlight.Thetrans-
mitting power is less than 1 mW (laser class 2).
Warning: Never look directly into the laser beam!
The universal socket is suitable for all common plugs with 2.5 mm ferrule. It
hasabronzespringsothattheferruleisheldrmlyinthesockettoprevent
accidental unplugging. The ceramic material protects the ferrule against me-
tallic impurities.
If required, adapters are available from 2.5 mm to 1.25 mm (Z180A), from
2.5 mm to POF (Z180B) and from 2.5 mm to SMA 905 (Z180C).
Testing Procedure
SwitchontheET800inTONEmode.Nowplugtheberopticcablewiththe
ferrule into the universal socket. To switch on the laser source, press the
SOLID andALT keys together for > 1 s.TheET800 conrmsthe LASER
modewithapower-onsoundandaashingALTLED.
Atrsttheunmodulatedmodeisactive.TheFOsignalashesandcorre-
spondingly the ALT LED 1 × per second. To switch to the equally unmodulat-
ed constant FO signal Continuous Wave (CW), press the SOLID key.
To change to the modulated mode, press the ALT or SOLID key > 2 s, de-
pending on which signal you want. In each mode, 3 possible tone sequences
are available which can be activated by pressing the key again for > 2 s.
The tone sequence will be audible on the integrated speaker once right after
switching.
In case thatseveral bersare tobe distinguished, several ET800 can be
usedtogetherbutwithdi󰀨erentmodesandincombinationwithsuitablede-
tectionequipmentconnecttotheendofthebers.
Independent of LASER mode, the laser light source can be used to detect
small breaks in bad connections, strong bends and the end of the connected
cable.Thesearchdistanceis>10km,butdependsonthebertype.
² Insomecases,theNLPsignallteringmustbedeactivatedinthesettingsofthehub/
router/switch.