optical
CON powerMONITOR
15
... Appendix - Application
b) System monitoring with unknown output power
Fiber Type
Attenuation Range
single-mode
-9 dB
multimode
-7 dB
Example:
-
To determine the attenuation of a system, connect a light source
as e.g. Neutriks measurement KIT (CAS-FOMD
1
) with help of a LC
patchcable and the used opticalCON cable (e.g. NKO4S-R-0-50
1
)
and powerMONITOR
(e.g.
NO4SBB1-4PM).
The light source offers a typical output power of -3 dBm (2kHz
mode). The difference of the output power (
∆dB
)
is the total atten-
uation of the system (cable + devices).
The difference between the recent power budget and the system
attenuation shows the corresponding threshold level.
After connect the device (transceiver, DVI-converter, etc.) with the
powerMONITOR.
Set the threshold from the powerMONITOR according the calcu-
lated value (see example below).
If no power budget is known use typical attenuation values from
the table on the left.
1
...not included
Attenuation Range:
I -9 dB I
System Attenuation:
I -5 dB I
Threshold Level: 4 dB
light source
(unknown
output power)
CAS-FOMD
powerMONITOR
e.g. NO4SBB1-4PM
