10F: Bi-directional Loss & ORL Measurement
^{Using a Pair of Two-way LTS}

Introduction

This method is the fastest and most accurate method for any link. The method of operation is a simplified version of Example 3:

• A bi-directional LTS is required at each end.
• Each instrument is referenced to itself, which is best done just before the measurement. This greatly reduces the problem of source drift, battery life, etc.
• The bi-directional dual wavelength measurement takes about the same time as a single direction, single wavelength measurement using previous generation instruments.
• The averaged link loss results are displayed directly on both instruments. If dual wavelength LTS are used, both values are displayed. No operator calculation is required.
• If the appropriate LTS is used, the return loss from each end is also automatically measured.
• If the KITS™ program is used, the measurement is clicked directly into the user report

Key

	Connectorised link
	Patch Cord
	Through adaptor
	Source, incl. mandrel wrap if multimode
	Meter
	DUT Device Under Test (system being tested)

More Information

• Two Way Loss Test Sets
• Other T & M Products
• More Application Notes

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