A.H. Systems SAS-517 Operation Manual - Page 14

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A.H. Systems SAS-517 Log Periodic Antenna

MAINTENANCE

Proper antenna maintenance should include:

At least once a month it is a good idea to wipe down the antenna with a damp

rag.

To ensure reliable and repeatable long-term performance, annual re-calibration

of your antennas, preamplifiers and current probes by A.H. Systems

experienced technicians is recommended. Our staff can calibrate almost any

type or brand of antenna.

It is always up to the user to determine the appropriate interval for calibration

certification based on the requirements of the end users specific

test/application. The calibration of EMC antennas is important for those

conforming to compatibility standard. Radiated emissions testing for

electromagnetic compatibility (EMC) requires the measurement of electric field

(E-field) strength, which is compared with a limit level. The output voltage of an

antenna is converted to E-field strength via its antenna factor, the measurement

of which must include the uncertainty components related to that particular

antenna, taking into consideration the environment in which the antenna is to be

used for the testing. Most standards will specify the appropriate interval for re-

calibration of your EMC antenna.

In some cases these antennas are used for a manufacturers pre-compliance

testing, field monitoring, surveillance and/or other applications where the exact

field intensity of the received signal is not of importance. For those customers a

yearly re-calibration is not necessary, however it is recommended that an

interval for maintenance be performed.

For more information about our calibration services or to place an order for

antenna calibration visit our website at http://www.AHSystems.com

or call 1(818) 998-0223.

 A.H. Systems inc. – May 2014

REV C



Visual inspection of RF connectors



Check for bent and loose elements



Check for loose or missing hardware



Corrosion near the element joints