There are three field ensembles out of the fifty ATSC field ensembles that have no video. How should the performance of the CECBs be determined for these field ensembles?

Technical Appendix 1, Item 14 (Field Ensembles) specifies the criteria used for compliance for field ensemble testing. Question #14 from the Manufacturers' Frequently Asked Questions clarifies how errors in the field ensemble testing should be counted. Determination of errors is based upon human observation of the video and audio.

Since three field ensembles have no video, they cannot be used to evaluate multipath performance using our criteria. Because of this and in order to be as fair as possible, we will assume that these three field ensembles automatically meet our criteria (i.e. , pass) for all DTV converter boxes.

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