INTRODUCTION

The Electrical Performance Standards for Random Interlace Closed Circuit Television Cameras given here represents, it is believed, the best agreement between the members of the Closed Circuit Television Committee, who drafted these Standards, consistent with the rapidly developing state-of-the-art. A random interlaced camera has no defined relationship between horizontal and vertical scanning frequencies and those frequencies are derived from separate non-related sources.

Committee TR-17 has undertaken the development of Electrical Performance Standards for Monochrome Random Interlace Closed Circuit Television Cameras to define significant parameters descriptive of operation of these devices and to outline minimum levels of performance deemed desirable to develop an acceptable display. This effort will promote interchangeability of the product of different manufacturers, thereby eliminating confusion on the level of performance that can be expected from an appropriately specified device. It will assist the purchaser in selecting and obtaining the proper product for a particular need. The lack of a previous standard for random interlace closed circuit television cameras justifies this work.

(The term camera as used in this document may include a single or multiple unit camera chain.)

The standards consist of (1) Definitions, (2) Standards, and (3) Methods of Measurement, for those parameters believed to be of importance.

These Standards are intended to apply only to locally generated signals; that is, signals generated in the camera itself or at a nearby point where control can be exercised over picture quality. All test measurements shall be made in a typical room environment. They are not intended to apply to equipment described by EIA (RETMA) Standard, RS-170, Electrical Performance Standards--Monochrome Television Studio Facilities, or EIA Standards, RS-330, Electrical Performance Standard for Closed Circuit Television Camera 525/60 Interlaced 2:1, or revision thereof. Referenced is EIA Bulletin No. 1, Closed Circuit Television Definitions, or revision thereof.

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