1、MIL-R-705bOB 90b i1844725 b07 -I MIL-R-70560B (AR) : 4- -Y control processor where it is usGa 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
2、 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 each contain Built-In-Test (BIT) circuitry to monitor signals and provide fault isolation capability (see 6.1). Beneficial oommeots (-ricia, additiais, d
3、eletions) and MY pertinent data which may be of use io improving this document sbdd be addressed to: canmander, U.S. Army ARDE, ATrN: SMCAR-BAGS, Picatinny Arsenal, New Jersey M8-5000 by using be aelf-addnssd suloduizatioo Document Improvement Propasai (DD Fom 1426) appearing at the end of this docu
4、ment or by W. 04 December 1991 SUPERSEDING (See 6.6) MILITARY SPECIFICATION RADAR SET AN/VPS-SA: 9360797 (RANGE ONLY RADAR) This specification is approved for use by the U. S. Army Armament, Munitions and Chemical Command, and is available for use by all Departments and Agencies of the Department of
5、 Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements and tests for a Radar Set AN/VPS-ZA, 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
6、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 a
7、ntenna (Unit i) consists of the reflection and feed assembly, traverse and elevation servo drive assemblies, and waveguide traverse and elevation rotary joints. (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
8、. 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 siqnals and supplies this information to the fire The receiver-transmitter 5 AMSC N/A Bc 12
9、85 W Approved for public release; distribution is unlimited. i Licensed by Information Handling ServicesMIL-R-705bOB M 0b L8VV72b 543 M MIL-R-70560B (AR) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards and handbooks. The following specifications, standards and handb
10、ooks form a part of this document to the extent specified herein. specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicita- tion (see 6.2). Unless otherwise SPECIFI
11、CATIONS MILITARY MIL-F-13926 - Fire Control Materiel, Manufacture and MIL-1-45607 - Inspection Equipment, Acquisition, MIL-R-50674 - Receiver, Radar R-1475/VPS-2: 10548338 MIL-A-50687 - Antenna Assembly, AS-2049A/VPS-2: 12563312 MIL-R-70561 - Receiver-Transmitter, Radar RT-860AIVPS-2A: MIL-C-70562 -
12、 Computer, Range CP-888A/VPS-2A: 9361153 MIL-P-70563 - Power Supply: PP-4812A/VPS-2A: 9361154 MIL-D-70704 - Distribution Box: 9397370 (Unit 6) Inspection, General Specification for Maintenance and Disposition of (Unit 3) and 12563321 9361152 (Unit 2) (Unit 4) (Unit 5) STANDARDS MILITARY MIL-STD-109
13、- Quality Assurance Terms and Definitions MIL-STD-810 - Environmental Test Methods and EngineerdIg Guidelines (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Ave
14、nue, Philadelphia, PA 19111-5094.) 2.1.2 Other Government documents, drawings and publications. The following other Government documents, drawings and publications form a part of this specification to the extent specified herein. Unless otherwise specified, the issues shall be those cited in the sol
15、icitation. 2 Licensed by Information Handling Servicese I e e MIL-R-705bOB 999990b 1844727 48T D MIL-R-7056OB (AR) DRAWINGS (See 6.4) U. S. ARMY ARMAMENT RESEARCH, DEVELOPMENT AND ENGINEERING CENTER (ARDEC) 9360797 - Radar Set AN/VPS-2A 9361225 - TS-3211/TSM - 100B, Remote Bit Test Cable 9397549 - R
16、adar Set AN/VPS-2A Interconnecting Wiring 10548164 - IF Amplifier 11748124 - Radar System Tester AN/VPM-2 12950877 - Requirements for Soldering Electrical and 9361217 - TS-3211/TSM - 100B, Remote Bit Test Set Diagram Electronic Assemblied SPECIAL PACKAGING INSTRUCTION PS 9360797 - Packaging of Radar
17、 Set, AN/VPS-2A (Copies of drawings, publications and other Government documents required by the contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) text of this document and the references cited
18、herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.2 Order of precedence. In the event of conflict between the 3. REQUIREMENTS 3.1 Materials. Materials shall be in accordan
19、ce with the applicable drawings and specifications. 3.2 Components and assemblies. The components and assemblies shall comply with all requirements specified on Drawing 9360797, all associated drawings, and with all requirements specified in applicable specifications and standards. Where applicable,
20、 the radar shall meet the requirements of MIL-F-13926 as follows: a. Dimensions and tolerances. b. Inorganic protective surface finishings. c. Part identification and marking. d. Workmanship 3 Licensed by Information Handling ServicesMIL-R-70560B (AR) 3.2.1 Subassemblies. The units of the radar shal
21、l have been inspected and accepted in accordance with their respective drawings and specifications prior to their installation in the radar. The following units are covered by the indicated specifications: UNIT NO. 1 2 3 4 5 6 3.3 NAME Antenna Assembly AS-2049A/VPS-2A: 12563321 Receiver-Transmitter,
22、 Radar RT-860A/ VPS-2A: 9361152 Receiver, Radar R-1475/VPS-2A: 10548338 Computer, Range CP-888A/VPS-2A: 9361153 Power Supply PP-4812A/VPS-2A: 9361154 Distribution Box: 9397370 Environmental service conditions. SPECIFICATION MIL-A-70708 MIL-R-70561 MIL-R-50674 MIL-(2-70562 MIL-P-70563 MIL-D-70704 3.3
23、.1 vibration. The radar shall not suffer damage and shall meet the requirements of 3.4 and 3.5 after exposure to the equivalent of 6000 miles of track-laying vehicle operational vibration as defined by MIL-STD-810 narrowband random-on-random data for equipment installed on the deck of the M113 armor
24、ed personnel carrier. 3.3.2 Shock. The radar shall not suffer damage and shall meet the requirements of 3.4 and 3.5 after exposure to a total of 18 impulse shocks consisting of three shock impulses of 15 gs 2 lo%, 11 milliseconds + lo%, half-sine wave applied in each direction of 3 mutually perpendT
25、cular axes. 3.3.3 Altitude operatinq. The radar set shall meet the requirements of 3.4 and 3.5 during and after exposure to barometric pressure encountered at 10,000 feet above sea level 20.6 inches of Hg) 4 Licensed by Information Handling ServicesMIL-R-705bOB 0b 1844729 252 5 I MIL-R-70560B (AR) 3
26、.3.4 Temperature. 3.3.4.1 Operatinq. The radar shall meet the requirements of 3.4 and 3.5 when stabilized thermally at any temperature between -40 deg F and +155 deg F. 3.3.4.2 Non-operating (storagel. The radar shall not suffer permanent damage when subjected to the constant temperature extremes of
27、 -60 deg F for a period of 24 hours and +160 deg F for a period of 4 hours (after temperature stabilization), and shall meet the requirements of 3.4 and 3.5 when returned to room ambient. 3.3.5 Humidity (non-operatinql. The radar shall meet the requirements of 3.4 and 3.5 after exposure to an atmosp
28、here with a relative humidity in excess of 95 percent for a period of 10 days. 3.4 Electrical. Each conductor shall be electrically con- tinuous as specified on the schematic diagram of the radar. A 3.5 Performance. The radar shall meet the requirements of this section when supplied with 22 volts di
29、rect current (Vdc) to 30 Vdc from a 750 watt (W) source and 115 V + 5 percent, 400 Hz + 1 percent, from a 15 W source. - - 3.5.1 Standby power. The radar shall use the 22 Vdc to 30 Vdc primary power to activate its standby circuits. The blowers in Units 2 and 5 shall be activated upon application of
30、 standby power which shall enable the radiate functlcn 120 + 12 seconds after application of standby power. 0 - 3.5.2 Radar-ready signal. The radar shall provide a single- pole double-throw (SPDT) switch action to the FCP, indicating that the radar is ready to radiate. 3.5.3 Radiate function. The ra
31、GLate function shall be available through closure of 2S6 (SEHV RAD CONT) in the receiver- transmitter unit cover or through application cf +22 Vdc to +30 vdc at 2J1 pin R from a remote control Uiik. 3.5.4 Unit 2 icterlock. The Unir 2 interlock switch shall close when the cover of the RT unit iE tigh
32、tened down enabling Unit 2 operation. When the RT unit cover 1s open, the interlock switch shall open, preventing operation of wit 2. The monual override feature shall permit operation of urti! 2 when the C,z unit cover is open and the interlock switch is in tke manual override position. 3.5.5 Trans
33、mit characteristics. 3.5.5.1 Averaqe power. The minimm average transmit power on any channel shall be 4.26 W at 253. 3.5.5.2 RF transmit mode. a. The radar transmit pulsc ihaape shall be cosine squared O Licensed by Information Handling ServicesMIL-R-705bOB 0b LBr1r1730 T?V - MIL-R-70560B (AR) (COS2
34、). b. The radar transmit pulse width shall be 280 2 $8 nanoseconds (ns) at 50 percent points. 3.5.5.3 Transmit frequency. The receiver-transmitter unit shall be capable of operation on six discrete frequencies by selecting one of six oscillator plug-in modules. the transmitted signal shall be 9205 m
35、egahertz (MHz) i 10 MHz using channel 1 oscillator module. reference, the channel 2 through 6 output frequency shall be as follows : The frequency of Using the channel 1 measurement as a Channel 2 Reference +8 i 2 MHz Channel 3 Reference +16 2 2 MHZ Channel 4 Reference +24 2 2 MHZ Channel 5 Referenc
36、e +32 2 2 MHz Channel 6 Reference +40 5 2 MHz 3.5.5.4 Pulse repetition frequency (PRF). The PRF shall be not less than 19,978 and not more than 19,979 pulses per second. 3.5.6 Midrange cal function. The midrange cal function shall provide a self test of the radar ranging circuits. When midrange cal
37、switch (4S1) on the range computer is depressed, midrange cal lamp (4DS1) shall illuminate brightly. dB maximum at room temperature (70 deg F). 3.5.7 System noise fiqure. The system noise figure shall be 13 3.5.8 Receivinq characteristics. 3.5.8.1 Clutter lock-on function. The clutter lock-on functi
38、on shall enable radar lock-on of the stationary targets for test purposes when the CLUTTER LOCK-ON switch on Unit 2 is in the test position. shall be + 10M for targets of 1000 meters range or less and + 1% for targets at greater than 1000 meters to the maximum range of 5000 meters . 3.5.8.2 Ranqe an
39、d mode data. The accuracy of the range output 3.5.8.3 Subclutter visibility. The subclutter visibility shall be a minimum of 40 DB with or without automatic gain control (AGC) under MDS conditions. clutter level of -15 dBm shall be 40 dB minimum. The subclutter visibility-with AGC at a 6 Licensed by
40、 Information Handling ServicesMIL-R-705bOB 99999Ob 1844331 900 D MIL-R-70560B (AR) 3.5.8.4 AGC characteristics. With a clutter signal input the AGC circuit shall maintain a constant output from the intermediate frequency (i-f) amplifier from the point f AGC cut-in to O dBm input signal at 2J3 with a
41、 flatness of + 1 dB. Under these same conditions, the sum channel noise level-at 4TP46 and 4TP47 shall not increase more than 1 dB. The AGC circuit shall be stable in the presence of clutter signals of O dBm level at 2J3. in the digital range word to activate the remote panel ECM indication when the
42、 signal level is 20 i 5 dB greater than the lock threshold and the target velocity is less than 10 M/s. The ECM detect signal shall cause the TRACK/JAM/RADIATE lamp on the M61A1 sight to flash at a 1 Hz rate. 3.5.8.5 Active ECM indication. The radar shall provide a bit 3.5.8.6 Three-second fade loqi
43、c. When the velocity of the target falls below 10 M/s, the radar shall maintain the track mode for 3.00 t 0.25 seconds after loss of doppler signal. 3.5.8.7 One-second fade loqic. When the radar is tracking a target with a velocity between 10 M/s and 310 M/s and target return signal reduces to a val
44、ue below the minimum discernible signal (MDS) of the radar, the radar shall maintain the track mode for 1.0 + 0.02 seconds after the signal level drops below the MDS of the radar with the range rate equal to the last value of range rate before loss of signal - + 20 M/s. 3.5.8.8 Ranqe rate laq. The r
45、ange rate lag, when tracking a target which is accelerating from O to 243 M/s at an 81 M/s2 rate, shall not exceed 30 M/s. 3.5.8.9 Minimum ranqe trackinq. The radar shall track an inbound target to a minimum range of 250 meters before breaking track. 3.5.8.10 Receiver bandwidth. The 3 dB bandwidth o
46、f the radar receiver shall be 1.9 f. 0.2 MHz. 3.5.9 Antenna characteristics. The antenna shall meet all the requirements of MIL-A-70708. 3.5.10 BIT assemblies. Radar Units 2, 4 and 5 shall contain BIT assemblies that monitor radar performance and provide range data to an external fire control proces
47、sor. The performance of the BIT assemblies shall be as specified in MIL-R-70561, MIL-C-70562 and MIL-P-70563, respectively. 3.6 First article. When specified in the contract or purchase order, sample shall be subjected to first article inspection in accordance with the technical provisions herein (s
48、ee 4.3). 7 Licensed by Information Handling ServicesMIL-R-705bOB = 0b 3844732 8r(7 MIL-R-70560B (AR) 3.7 Solderinq. All soldering shall be in accordance with the general requirements of Note 2 of Drawing 12950877. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise sp
49、ecified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure suppli
