S331L UG PN: 10580-00321 Rev. M 1-7
General Information 1-4 Calibration and Annual Verification
RF Input Warning
The Anritsu Site Master is a sensitive measuring instrument designed
to measure low power levels. Avoid damaging this sensitive circuitry by
observing the maximum input levels printed on the instrument
connector labeling and specified in the product technical data sheet.
Depending on your instrument hardware revision, typical maximum
input is +42 dBm or +23 dBm (±50 VDC). Check the RF Out/Reflect In
connector labeling on the unit. The maximum RF input could be less if
additional features, such as a preamplifier, are in use. Review the
product technical data sheet or Anritsu website for recommended
components and accessories that can help you protect your instrument.
These include a variety of adapters, attenuators, filters, and RF
detection accessories.
1-4 Calibration and Annual Verification
The Cable and Antenna Analyzer requires user performed calibration
before making line sweep measurements. Calibration can be quickly
and easily performed at the end of a test port cable (not included) using
the built-in InstaCal module. External OPEN, SHORT, and LOAD
(OSL) calibration method is another option and requires Anritsu OSL
components which are sold separately. Flex Cal is supported using
either calibration method. Refer to Chapter 7, “Calibration” for
additional information.
The external InstaCal Calibration Modules (ICN50 and ICN50B) are
NOT compatible with the Site Master S331L.
Anritsu recommends an annual calibration and performance
verification of the Site Master by local Anritsu service centers. Anritsu
service also recommends a semi-annual verification of OSL calibration
components.
Note
Anritsu recommends allowing the S331L to warm up for
5 minutes to typical operation temperature before calibrating.
The instrument will require a new calibration if the internal
instrument temperature changes more than ±20 ºC after
calibration.
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