FO600 Datasheet, PDF (43/57 Pages) Extech Instruments Corporation. – FiberMeter Optical Power Meter

UNIT 4
Extech Reporter
Interpreting Extech Reporter Screens and Reports, cont.
Light Source Reference Power
Definition: the amount of absolute optical power being received directly from the light source by the
power meter during the setting of the optical reference. Light Source Reference Power is used as a
reference, or starting point, on which a standards-based optical reference is set.
Units: dBm
Calculation: none; Light Source Reference Power is measured via a single patch cord of the appropriate
type.
CHARGER
850nm
1300nm
Dual
LED
MULTI MODE
LIGHT SOURCE
NOTE: testing standards require multimode reference
cables to be wrapped around a device called a mandrel,
which is used to filter high-order modes and achieve EMD,
or Equilibrium Mode Distribution (shown here).
Singlemode test jumpers do NOT require this mandrel.
INVALID
OPERATING
MARGIN **
Total Allowable System Loss
Optical Loss
PASS
OPERATING MARGIN
or
SYSTEM OVERHEAD
FAIL
Light
Source
Reference
Power (dBm)
Measured
Power (dBm)
Minimum
Required
Power (dBm)
4-7