AEM TESTPRO CV100, Руководство пользователя, Страница: 23 / 47

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customercare@aem-test.com | Version # : 2.2
TestPro CV100
User Manual
Take the following steps to measure the HOML of the light
source and launch cord combination:
1.
2.
3.
4.
5.
6.
Attach the reference launch cord to the light source.
Deploy the launch cord in a manner free of bends
smaller than 75 mm (3 inches) in radius.
Using the Light Source / Power Meter Mode, measure
and record the output power level, P0, in dBm.
Without disconnecting the launch cord from the
source or mechanically disturbing the connection to
the source, wrap and secure the launch cord in five
non-overlapping adjacent turns around the mandrel.
Measure & record the output power level, P1, in dBm.
Calculate HOML using equation, HOML [dB] = P0
[dBm] - P1[dBm]. The HOML of the source and launch
cord combination determines if and how the source
and launch cord are to be used for subsequent cable
plant loss measurements, as per the below table.
>0.6
0.1-0.6
<0.1
Measure cable plant with HOML test mandrel wrap left in
place on launch cord
Measure cable plant with HOML test mandrel wrap
removed from launch cord
Source and launch cord combination disqualified for
measuring cable plant loss
HOML [dB] SOURCE AND LAUNCH CORD QUALIFICATION
It is important to perform set reference before starting
an Autotest to ensure the accuracy of the test results. A
2-meter set reference cord is included in the fiber kit. Make
sure that the reference cord is cleaned and not degraded
before performing the set reference.
b. Fiber Set Reference
Perform set reference only after:
Powering off and then powering on the TestPro unit.
Disconnecting and then reconnecting the fiber
adapter.
Replacing reference cords in either the TestPro main
or remote unit.
Changing the configuration from loopback to dual
ended and vice versa. •
•
•
•
AEM recommendations:
Wait for 5 minutes after powering up the fiber
adapters before performing set reference, so that
they are properly warmed up and the temperature
has stabilized.
Perform one jumper set reference.
Do not disconnect the reference cord in the fiber
adapter TX port after performing set reference.
•
•
•
i: One/Two/Three Jumper Method
1.
2.
3.
One Jumper Set Reference – connect 2 meter
reference cords from main to remote
Two Jumper Set Reference – connect 2 meter
reference cords from main to fiber connector and
another 2 meter reference cords to remote.
Three Jumper Set Reference – connect 2 meter
reference cords from main to fiber connector, then 2
meter reference cords to another fiber connector and
another 2 meter reference cords to remote.
Mandrel Wrap for
Multi-Mode (if required)
Mandrel Wrap for
Multi-Mode (if required)
2 meters
Main
Tx Rx
Tx Rx
Two Jumper Set Reference
Remote
Mandrel Wrap for
Multi-Mode (if required)
Mandrel Wrap for
Multi-Mode (if required)
2 meters
Main
Tx Rx Tx Rx
Three Jumper Set Reference
Remote
2 meters
Mandrel Wrap for
Multi-Mode (if required) Up to 2 meters
Mandrel Wrap for
Multi-Mode (if required)
One Jumper Set Reference
Main Remote
No connectors in the paths