Tektronix OI1125, Instruction Manual

Page: 47 / 88

Performance Verification
OI1125 E/O Transmitter Instruction Manual
35
Check the output wavelength of the internal laser by doing the following:
CAUTION.
To prevent eye damage, always disable the laser with the front-panel
keyswitch when making optical connections.
1. Connect the internal laser output to the wavelength meter input, using the
FC/APC-to-FC/PC single mode cable. See Figure 13.
2. Enable the laser by turning the keyswitch clockwise (to the unlocked
position). The Laser On LED and Laser Output Active LED both light.
3. Verify that the
λ
Adj Enable pushbutton switch is disabled (the
λ
Adj On
LED to the left of the switch is not lighted).
NOTE . The Laser Output Active LED may flash briefly while the laser stabilizes.
4. Check that the wavelength displayed on the meter is within the limits on the
test record, and record the wavelength on the test record.
5. Push the
λ
Adj Enable switch to enable the adjustment knob (the LED to the
left of the switch lights).
6. Vary the
λ
Adjust control on the front panel, from fully counterclockwise
(minimum), to fully clockwise (maximum). Check that the wavelength
displayed at both extremes is within the limits on the test record, and record
the measured wavelengths on the test record.
NOTE
. The Laser Output Active LED may flash briefly while the laser stabilizes.
7. Disable the laser by turning the keyswitch counterclockwise to the locked
position. The Laser On LED and Laser Output Active LED both turn off.
8. Disconnect the cable from the wavelength meter.
OI1125
Laser out
(FC/APC)
Optical in
(FC/PC)
Laser On
LED
Laser Output
Active LED
Wavelength meter
Optical cable
174-4727-00
Figure 13: Setup for the output wavelength test
Output Wavelength