9: Maintaining A Pnts; Calibrating The Pnts; Cleaning The Pnts; Cleaning The Fan Filter - Symmetricom 5120A Operation And Maintenance Manual

9: Maintaining a PNTS

9.1 Calibrating the PNTS

Symmetricom can provide a manufacturer's calibration.
A performance verification procedure is available from Symmetricom to enable a customer or
calibration lab to perform the calibration.
Contact Symmetricom Customer Assistance (see page 95) for pricing or to obtain the performance
verification procedure.
For information about calibrating the 5120A-01 internal reference oscillators see
Internal Reference"

9.2 Cleaning the PNTS

Warning
Do not spray or use too much liquid when cleaning the test set. Liquid can enter the test set and
damage sensitive electronic components.
Clean the main chassis with a soft cloth dampened with a mild soap and water solution.

9.3 Cleaning the Fan Filter

Units that started shipping in March 2009 include a small fan on the rear cover for commonality
with the 5125A chassis and to improve cooling. The fan filter can be removed from the outside of
the instrument. You can use a small flat screwdriver to gently pry the black fan grating from one
corner of the fan cover. After removing one corner, pull the fan grating straight away from the rear
of the instrument to remove it. The foam fan filter can them be removed. Clean the filter with low
pressure compressed air. Re-install the foam filter and grating.
5120A/5115A Operations and Maintenance Manual
on page 72.
"8.1 5120A-01
75