Keysight Technologies N77 Series User Manual page 92

5 Maintenance and Troubleshooting
W A R N I N G
92
Never look into the end of an optical cable that is connected to an active source.
To assess the projection of the emitted light beam you can use an infrared sensor
card. Hold the card approximately 5 cm from the output of the connector. The
invisible emitted light is project onto the card and becomes visible as a small
circular spot.
Preferred Procedure
Use the following procedure on most occasions.
1 Clean the connector by rubbing a new, dry cotton-swab over the
surface using a small circular movement.
2 Blow away any remaining lint with compressed air.
Procedure for Stubborn Dirt
Use this procedure particularly when there is greasy dirt on the
connector:
1 Moisten a new cotton-swab with isopropyl alcohol.
2 Clean the connector by rubbing the cotton-swab over the surface
using a small circular movement.
3 Take a new, dry soft-tissue and remove the alcohol, dissolved
sediment and dust, by rubbing gently over the surface using a small
circular movement.
4 Blow away any remaining lint with compressed air.
An Alternative Procedure
A better, more gentle, but more expensive cleaning procedure is to use
an ultrasonic bath with isopropyl alcohol.
1 Hold the tip of the connector in the bath for at least three minutes.
2 Take a new, dry soft-tissue and remove the alcohol, dissolved
sediment and dust, by rubbing gently over the surface using a small
circular movement.
3 Blow away any remaining lint with compressed air.
Keysight N77xx Series