HP 83481A, User Manual, Page: 55 / 98

Calibration Overview
performed regularly in order to ensure proper measurement accuracy and
repeatability .
C A U T I O N
The input circuits can be damaged by electrostatic discharge (ESD). A void
applying static discharges to the front-panel input connectors . Before
connecting a coaxial cable to the connectors , momentarily short the center
and outer connectors of the cable together . A void touching the front panel
input connectors without rst touching the frame of the instrument. Be sure
that the instrument is properly earth-grounded to prevent buildup of static
charge . It is strongly recommended that an antistatic mat and wristband be
used when connecting to electrical channel inputs , particularly TDR inputs .
Calibration interval HP recommends that the factory calibration be performed on a periodic
basis . HP designs instruments to meet specications over the recommended
calibration interval provided that the instrument is operated within the
specied operating environment. T o maintain specications , periodic
recalibrations are necessary . W e recommend that the plug-in module be
calibrated at an HP service facility every 12 months . Users are encouraged to
adjust the calibration cycle based on their particular operating environment
or measurement accuracy needs .
Required warm-up time The instrument requires a 1 hour warm-up period before any of the
calibrations mentioned in this chapter are performed. It is not enough for the
instrument to be in the standby setting. It must be turned on and running for
the entire hour .
Remote operation Remote programming commands for calibrations are included in the HP
83480A/HP 54750A Programming's Guide. P erforming calibrations remotely
is slightly dierent than the operation of front-panel calibrations .
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