BNC 130 - Manual (Page 27)

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SECTION 4
MAINTENANCE AND CALIBRATION
MAINTAINENCE
Light Output Connector
For satisfactory performance, proper care in the use of the optical components is necessary. There must
be no contamination to interfere with the passage of light through the fiber end connections and the
bulkhead connector. The following procedures should be observed.
1. Minimize the number of times connecting and disconnecting the optical cable.
2. Keep the connectors absolutely clean.
3. Keep the output bulkhead connector and the user's connector capped when not in use.
CALIBRATION
General
The calibration of the 106C/155/130 module is in two parts: the first is for setting control voltages on the
Module Interface board (PCB 6040-4); the second is for setting the Laser Output board (PCB 155-1) for
the correct power output and impulse characteristics and to verify the External Modulation bandwidth.
It is recommended that the calibration of the 155/130 module be verified every 12 months. The
instrument requires no warm up period exceeding that of the 6040, for which ten minutes is suggested.
Equipment Required
• 3-1/2 digit (or better) DVM.
• BNC 6100 Optical Power Meter (or equivalent) calibrated for the appropriate wavelength.
• 1 GHz bandwidth oscilloscope (sampling or real time). A Tektronix 7000 Series with appropriate
sampling plug-ins is satisfactory.
• 1 GHz bandwidth 1330 nm detector (InGaAsP). A Tektronix S-42 Optical Sampling Head can be
used with the 7000 Series Oscilloscope.
• 1 GHz variable sine wave generator. An HP 8657A Signal Generator with a Type N to SMA
adapter can be used.
• Threaded SMA (3 mm) terminated 30 ohm coaxial cables, 1 meter length.