MIL-R-70560B

Abstract

This specification covers the requirements and tests for a Radar Set AN/VPS-2A, hereafter referred to as the radar. The radar is used in the Gun, Anti-Aircraft, Artillery, Self-Propelled 20MM, M163A2, and Towed 20MM, M167A2. The radar is a coherent, X-band radar, which measures target range and uses the doppler principle to detect the target and remove clutter interference. The radar set measures target distance along the line of sight as range and continuously supplies this data to the fire control processor (FCP). The radar is comprised of six major units. The antenna (Unit 1) consists of the reflection and feed assembly, traverse and elevation servo drive assemblies, and waveguide traverse and elevation rotary joints. The receiver-transmitter (Unit 2) generates the high power transmit pulse for radiation by the antenna and picks up the target echoes and sends them to the receiver. The receiver (Unit 3) receives the target echoes from the receiver-transmitter and sends them to the range computer. The range computer (Unit 4) generates range and range rate digital data from the receiver signals and supplies this information to the fire control processor where it is used in computing target motion lead angles. The power supply (Unit 5) provides, distributes and regulates all power required by the radar. The distribution box (Unit 6) selects the mode of operation for antenna positioning and serves as a junction point for electrical interface between the antenna and other units of the radar set. Unit 2, Unit 4 and Unit 5 each contain Built-In-Test (BIT) circuitry to monitor signals and provide fault isolation capability (see <a>6.1</a>). <strong><b>Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, U.S. Army ARDEC, ATTN: SMCAR-BAC-S, Picatinny Arsenal, New Jersey 07806-5000 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.</b></strong> <b><u>Intended Use:</u></b> This radar is to be used to acquire and track moving aircraft targets and supply range information to the fire control processor. <br>