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PRE-SELECTORS FOR CONDUCTIVE EMC TEST

LAPLACE INSTRUMENTS RF910 AND RF915 EMC PRE-SELECTORS

Laplace Instruments RF915 Pre-Selector

Pre-Selectors are an essential requirement if measuring conducted emissions that have high broadband noise content. They effectively convert an EMC Analyzer into a receiver, as specified by CISPR16.

The Laplace Pre-Selectors are high specification, switched band filters which track the scanning of the EMC Analyzer. Control is via a USB cable from the Laplace EMC Engineer software supplied with the SA1002 and SA3000 emission analyses.

The Installation and operation of the pre-selectors are completely automatic, and the filters will automatically synchronize with the emission analyzer and will scan without any operator intervention. A front panel switch allows manual operation if required.

Two pre-selector models are available:
1. RF910 Band B, 150KHz – 30MHz. 8 filter bands
2. RF915 Band A & B, 9KHz – 30MHz. 13 filter bands

Pass band attenuation is just 4dB and out-of-band rejection is nominally 40dB.

Key Points
· Fully automatic operation.
· Band A (RF910)and band A+B (RF915) versions.
· No active components in RF path, so very high noise tolerance.
· 5 + 5 pole filters for high out-of-band rejection.
· Can be used with any EMC analyzer.
· Compact and cost effective.

Pre-Selectors for EMC test is an optional extra for the following products:
– SA3000 3GHz EMC emissions Analyzer
– SA1002 1GHz EMC emissions Analyzer
– RF300 Large Loop Antenna