VeEX MTTplus, Руководство пользователя

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This function works in conjunction with Optical Power Meter dongles (USB), such the optional UPM-100.
Insert the OPM dongle to on of the test set’s USB port before launching this application.
Optical Power and Loss Measurements
Wavelength:
This pull-down menu provides a list of calibrated wavelengths to match the signal being measured.
Test Mode:
Allows users to select between Power or Loss measurements.
In Power Meter mode the test set presents the direct power readings, which are displayed in dBm, mW or uW units. Users can
perform he conversions by using the button on the right side of the reading
In Loss Meter mode the test set reports the difference in power readings between the Laser Source (LS) output being used and
what is currently present at the connector after being attenuated by the fiber. The results are presented in dB. Loss meter
requires to be referenced (calibrated) to the Laser Source output. You must connect the LS to the OPM dongle using a short
patch cord and tap on the Reference button to record the 0dB point. Then that LS can be connected to the far-end of the fiber
to measure the loss.
Hold:
Freezes the last power or loss reading on the screen
Save:
Records instantaneous power or loss readings in the Result’s tab. This is useful when measuring multiple fibers or testing one
fiber with multiple wavelengths. Up to 12 measurements can be logged in the Results tab. You must use the 1 button to save these
results.
7.4.2.1 Setting Pass/Fail Limits
Whether measuring optical power or loss, there are always power input limits (saturation and Loss) or attenuation allowances that
determine whether the fiber cable meets the requirements for the desired application or network elements.
Power Limits (dBm):
When check-box is ticked, users can enter the Minimum and Maximum power levels allowed for the application
(e.g. in line with the transceiver’s dynamic range). If the power reading falls beyond those limits, the power measurement reading will
turn red.
MTTplus e_Manual D07-00-096P RevA00 Page 53 of 66