VeEX OTDR FX150+ Series, Руководство пользователя

Страница: 61 / 109

OTDR Series e-Manual, D07-00- 076P -RevD00 Page 61 of 109
•
Zero : Recalibrates the OPM to zero value for when measurement conditions change
significantly. When in doubt, perform this procedure prior to making any measurements.
For example, when you are testing in cold outdoor temperatures and then move testing
inside to a heated building.
Put cover over OPM test port BEFORE recalibrating
.
•
OPM server on:
Turns ON/OFF the OPM.
•
dB/dBm : Switches between dB and dBm measurement units.
•
Set (appears after tapping dB button): Sets the reference value for the current
wavelength.
•
Enter (appears after tapping dB button): Edits reference values.
6.11.3 Using the OPM
To use the OPM:
1. Power ON unit. Tap the
X
icon to close OTDR mode. Connect OLS to OPM using a
reference patchcord.
2. Tap Optical Power Meter on the Fiber main menu. For each OLS laser you will use in
testing, tap Set to establish the Reference value for this patchcord. The display should be
0.0dB for each laser after you pair OPM wavelength and tap Set .
3. In the OLS screen, tap Loop . This auto cycles through all available wavelengths on the test
port. The laser will change every three seconds. The OLS and OPM wavelength must be
the same.
4. If the light source has a WaveID option tap Wave ID in the OPM mode to detect the
wavelength of the incoming signal automatically.
The WaveID option is available for CW laser test mode only. If the
OLS Loop mode is ON, each wavelength will be shown and the scroll
bar can be used to see measurements for each laser. For more
information on OLS Loop mode, see 6.10.2 Using the Optical Light
Source .
5. Remove the reference cable and connect fiber to the OPM prt on the unit.
6. To record instantaneous power or loss readings, tap
Acquire . Repeat for additional fibers,
as needed. Results appear in
Table
screen and can then be saved to a file in the
Results
screen. For more information, see
6.12 Table
and
6.13 Results
.
7. When testing is complete, tap OPM server on to power down the OLS, and then
disconnect the cable and replace the port covers.