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DLS355 User Guide
Basic Testing
The DLS355 is calibrated to have an output power level of -5dBm. Variations in power level
between -5dBm and -8dBm may be normal depending on the quality and age of the test jumper, the DLS355 output port,
and other factors.
Always ensure the DLS355 is transmitting an acceptable power level before performing an insertion loss test. Simply insert
the test jumper (plugged into the DLS355) into a companion power meter set to the dBm mode. The power meter will
indicate the measured output power of the
Laser
. If this reading is not near -5dbm first inspect the DLS355 ferrule with an
Inspection Scope. If it passes according to IEC try using a different test jumper. If none of these resolve your issue please
contact Tech support -see the final page of this document for contact information.
Transmitting Light
The DLS355 transmits either the 1310nm or 1550nm wavelength on Multimode fiber. Be sure to use a test jumper to
mate the DLS355 to the fiber under test. this allows you to isolate the DLS355 from any dirt on the fiber being tested and
allows you to set reference when doing relative power tests.
Test Jumper
Mate Connectors
Signal Propagates Down
the Fiber
Caution: Invisible Laser Radiation
Please note that 1310nm and 1550nm wavelengths are not visible to the human eye. Do not look directly into the output
port of the DLS355 or directly into any fiber connector that may be live.
Since the Laser is invisible to the eye, the eye’s natural blink reflex is suppressed. This can cause damage to the retina.
FDA 21 CFR 1040.10 and 1040.11
IEC 60825-1: 2007-03
Class 1 Laser Product
Output Power
Test Jumper Plugged
Into Power Meter
Power Meter Displays
Output Power of Laser
