Tektronix TekRanger 2 TFS3031, Service Manual

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Performance Check – TekRanger 2 (serial nos. B052000 and above)
4–44
TFS3031 TekRanger/TekRanger 2 Service Manual
Singlemode Distance and Loss Measurement Accuracy Check
1. Clean the connectors on the TFS3031 and the TFS3031 singlemode loss and
distance accuracy test fixture.
2. Connect the TFS3031 to the loss and distance accuracy test fixture and turn
on power to the instrument.
3. Check that loss at the front-panel connection is minimized (0.75 dB or less).
a. Press the Setup softkey to display the Test Setup menu, and set the
range to 1 km and the pulse width to 5 m. Select 1550 wavelength, or
1310 if option 04. Press E
xit .
b. Press and hold the START/STOP button to start a real-time acquisition.
c. If front-panel loss is greater than 0.75 dB, clean the fiber connector and
the laser output port.
4. Press the Setup softkey, then press SELECT if necessary to display the Test
Setup menu.
5. Select 1550-nm wavelength, or 1310 nm if option 04.
6. Set the Fiber Scan setup to IntelliTrace.
7. Press the
Exit
softkey.
8. Press the
START/STOP
button to start an acquisition.
9. When the acquisition is complete, verify that the loss and distance reported
on the event table is within tolerance:
Loss must be within
±
0.03 dB (
±
uncertainty of the “calibrated” event)
Distance must be within
±
10 meters (
±
uncertainty of the “calibrated” event)
10. Repeat steps 4 through 9 for 1310 nm if option 06 or 10.