Tektronix TekRanger 2 TFS3031, Service Manual

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Performance Check – TekRanger 2 (serial nos. B052000 and above)
TFS3031 TekRanger/TekRanger 2 Service Manual
4–41
Singlemode Reflectance-Accuracy Check (Options 04, 06, and 10)
1. Clean the connector on the TFS3031 and the TFS3031 singlemode reflec-
tance test fixture.
2. Connect the TFS3031 to the reflectance 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. Set the reflectance test fixture for -40 dB at the wavelength of the laser being
tested (1550 or 1310 nm).
5. Press the
Setup
softkey, then press
SELECT
if necessary to display the Test
Setup menu.
6. Select 1550-nm wavelength, or 1310 nm if option 04.
7. Select the following test setups on the TFS3031:
Fiber Scan: Manual
Test Range: 20 km
Pulse Width: 20 m
Averages: 256
8. Press the SELECT button to go to the Format menu.
9. Set the reflectance setting ON.
10. Press the
Exit
softkey.