1、MIL-S-28854( EC) 19 February 1980 MILITARY SPECIFICATION SWITCHING GROUP, TRANSMITTER ANTENNA OK-261/BRC This specification is approved for use by the Naval Electronic Systems Command, Department of the Xavy, and is available for use by all Departments and Agencies of the Department of Defense. 1. S
2、COPE 1.1 Scope. This specification establishes the design, development, performance, and test requirements for the remotely controlled transmitter antenna switching matrix group referred to as the equipment) consisting of a radio frequency (RF) switch matrix and a remote con- trol unit. cations syst
3、em 2nd shall operate over a frequency range of direct current (DC) to 400 megahertz (hereinafter The matrix is used to interconnect transmitters and antennas in a submarine comuni- (MHz). 2. APPLICABLE DOCUMENTS 2.1 Government documsnts. The following documents, of Defense Index of Specifications an
4、d Standards (DoDISS) document to the extent specified herein. The date of the thereto shall be as specified in the solicitation, SPECIFICATIONS MI L I TARY MIL-E-i5090 MIL-E-16400 of the issue listed in the Department and its supplements, form a part of this applicable DoDISS and Supplements Enamel,
5、 Equipment, Light-Gray (Formula No. ill) Electronic, Interior Comnunicsation And Navigation Equipment, Naval Ship And Shore: General Specif- ication For MIL-E-17555 MIL-S-22885 hIL-C-24308 MIL-C-39012 E 1 ectron ic And Electrical Equipment, Accessor i es, And Repair Parts, Packaging And Packing Of S
6、witch, Push Button, Illuminated, General Specification For Connector, Electric, Rectangular, Mi ni ature Polarized Shell, Rack And Panel, General Specification For Cable Assembly, Electronic Test Equipment, (3 Wires, 125 And 250 Volts AC And 28 Volts DC) Grounding Plug Connector, General Specificati
7、on For Connector, Coaxial, Radio Frequency, General Specification For Beneficial comnents (recomnendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Conander, Naval Electronic Systems Comnand (ELEX-5043), Washington, D.C. by
8、using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. 20360, FSC 5820 Licensed by Information Handling ServicesMIL-S-28854 58 777770b 0355593 b = lrIL-C-28854( EC) MIL-C-55302 STANDARDS MIL I TARY MIL-STO-105 MIL-ST
9、D-10.8 MIL-STO-109 . MIL-STD-189 Connector, Printed Circuit Subassembly And Acc.essories Sampling Procedures And Tables For Inspection By Attributes Definitions Of And Basic Requirements For Enclosures For Electric And Electronic Equip- ment Quality Assurance Terms And Definitions Rack, Electrical E
10、quipment, 19-Inch And Associated Panels MIL-STD-275 Printed Wiring For Electronic Equipment MIL-STD-454 MIL-STD-461 MIL-STD-462 Standard General Requirement For Electronic Equipment Electromagnetic Interference Characteristics Requirements For Equipment Electromagnetic Interference Characteristics,
11、Measurement Of MIL-STD-471 Maintainability Demonstration MIL-STD-740 MI L-STD-781 Airborne And Structureborne Noise Measurements And Acceptance Criteria Of Shipboard Equipment Re1 iabi 1 ity Design Qual if ication And Production Acceptance Tests: Exponent ia1 Distribution - MIL-STO-810 Environmenta
12、1 Test Met hods MIL-STO-965 Parts Control Program MIL-STD-1378 MIL-STD-1472 Requirements For Employing Standard Electronic Modules Human Engineering Design Criteria For Military Systems, Equipment And Facilities (Copies of specifications and standards required by contractors in connection with speci
13、fic procurement functions should be obtained from the procuring activity or as directed by the contr att i ng off i Cer. ) 3. REQUIREMENTS 3.1 General. The equipment shall conform to the requirements of MIL-E-16400, except as hereinamecif ied. 3.1.1 First article. When specified (see 6.2.1) the cont
14、ractor shall furnish sample unit(s) for first article inspection and approval (see 4.3 and 6.3). 2 Licensed by Information Handling ServicesMIL-S-28854 58 H 9997706 0155572 8 H MIL-C-28854( EC) 3.1.2 E ui ment descriDtion. The equipment shall be designed in accordance with the re- quirements sp2ci:i
15、ed herein to provide the RF comnuriicatfon switching functions for intercon- nection of high frequency (HF) and ultra-high frequency (UHF) radio transmitters and antennas on board 688 Class SSNs. Oce coaxial type of transmission line RF switch matrix (Unit 1) One remote control (Unit 2) The switchin
16、g matrix group shall consist of the following: a. b. 3.1.2.1 RF switch matrix. The transmission stripline RF switch matrix (Unit 1) shall provide the RF, interlock, and control switching functions necessary for the interconnection of two HF transmitters, one spare HF transmitter, two UHF transceiver
17、s, and one antenna test set with three HF antennas, two UHF antennas, .one dumny load (HF and UHF), and spare outputs for two UHF antennas and one HF antenna. Primary control of the switch functions shall be supplied from the remote contro! (Unit 2). with local manual back-up switching of the RF pat
18、hs by means of a front panel knob. 3.1.2.2 Remote control unit. The remote control unit shall consist of a six-row, five-column pushbutton matrix which duplicates the configuration of the RF switch matrix as specified in 3.2.1.11. The operation of a pushbutton shall energize the corresponding actuat
19、or assembly in the RF switch matrix, rotating the rotor assembly to the TURN position and establishing the desired transmitter and antenna RF path. Also, through an electronic interlock circuit all other crosspoints in the same row and column that are in the TURN position shall be set to the THRU po
20、sition and shall verify the occurrence of switching. with the requirements specified in 3.2.1.11. Indicator lamps in the pushbuttons shall indicate the actual switch status labeling of inputs and outputs shall be consistent 3.2 Characteristics. 3.2.1 Performance characteristics. 3.2.1.1 Frequency ra
21、nqe. The RF switch matrix shall be capable of operating over a frequency range of OC to 400 MHz. 3.2.1.2 Averaqe power ratin . Switches used in the RF switch matrix shall be capable of continuous operation at 2 kilowat:s (kW) continuous wave (CW) power at 2 to 30 MHz and 400 watts (W) at 225 to 400
22、MHz with a maximum voltage standing wave ratio (VSWR) of 1.2:l. 3.2.1.3 Peak power ratin . The RF switches shall be capable of handling at least 5 kW peak power at 2 to 30 MHz and ? kW peak power at 225 to 400 MHz at a VSWR of up to 4:l. 3.2.1.4 Insertion loss. The insertion loss through any path in
23、 a single switch shall be 3.2.1.5 Characteristic impedance. less than 0.1 decibel (dB) from OC to 30 MHz and less than 0.2 dB from 30 to 400 MHz. shall be 50 ohms. The nominal characteristic impedance of each RF circuit 3.2.1.6 Crosstalk. terminated in the characteristic impedance shall be down at l
24、east 75 dB when measured at 30 MHz, and 50 dB when measured at 400 MHz. The transmit mode crosstalk between any two valid switch contacts when 3 Licensed by Information Handling Services- MIL-S-2885Ll 58 W 7797706 0355593 T W MIL-S-28854( EC) 3.2.1.7 Isolation. Isolation between the active switch cr
25、osspoints and any other open position shall not be less than 75 dB at 30 MHz and 50 dB when measured at 400 MHz. 3.2.1.8 Intermodulation. The third harmonic of a fundamental tone shall be at least 100 dB below the fundamental. 3.2.1.9 E. The VSWR shall not exceed 1.1:1 from 2 to 30 MHz and 1.2:l fro
26、m 30 to 400 MHz. 3.2.1.10 Functional performance. mission line assembly arrangement with rear vertical transmission lines as columns and the front horizontal transmission lines as rows. shall be provided to form a 5 by 6 switching matrix. Actuator assemblies shall be mounted on the rear of the switc
27、h so as to engage the switch rotor assembly and shall be controlled by a remote control unit. The rotary assembly shall be designed to permit manual operation of the motorized crosspoints by means of a front panel knob. designconfigured as shown in FIGURE 1. engraved on removable strips mounted on a
28、 subpanel visible through the front panel. shall be -indicated by arrows silk-screened on this subpanel. The RF switch matrix shall provide for a stripline trans- A rotor assembly at each column and row intersection 3.2.1.11 Split matrix design. The stripline matrix switch shall be a 5 by 6 split ma
29、trix The transmitter and antenna designations shall be The RF paths FIGURE 1. Configuration for split matrix. 4 Licensed by Information Handling ServicesMIL-C-28854( EC) . 3.2.1.12 Matrix switch reconfiquration. The switch matrix shall be capable of being reconfigured into a full matrix or any other
30、 practical split matrix configuration by an appropriate field change modification. 45 18 30.5 12.25 29.25 65 RF matrix 48.26 19 Control unit 48.26 19 45 18 17.5 7 15.75 35 3.2.1.13 Interlocks. The RF switch matrix shall provide interlock and bus circuits for each RF input and output path in accordan
31、ce with the requirements of FIGURE 2. Two interlock circuits shall be required for each input to each output and they shallduplicate the switc5ing of the RF circuit to provide complete interlock. Four additional separate bus circuits shall be provided between UHF transmitter and UHF antenna connecto
32、rs. provided on the rear of the RF switch matrix to provide input and output interlock interface to transmitters, antennas, and other units as shown in FIGURE 2. The interlock circuits shall cpen at least 20 milliseconds (AS) prior to RF switch opening, and RF switch opening, and RF switch closure s
33、hall occur within 50 ms before interlock circuit closure. Multipin connectors shall be 3.2.1.14 Pushbutton characteristics. Pushbutton switches shall conform to the requirements of MIL-S-22885. The lens color of matrix switches shall be areen and shall be lighted uoon connection of the activated RF
34、path. The lamps to be utilizd within the pushbutton matrix shall achieve a long life status by operating at 90 percent of rated voltage and shall be easily replaced from the front of the pushbutton switch matrix without special tools. Lens size and shape shall be a minimum of 1.25 centimeters (cm) (
35、0.50 inch (in) by 1.25 cm (0.50 in) square. Dual indicator 1mps for each matrix pushbutton switch shall be used in lieu of a lamp test switch. A status indicator lamp and a lamp test switch shall be provided to permit verifi- cation pf equipment status. Each row of the 5 by 6 remote pushbutton switc
36、h matrix shall be provided with an unlighted clear pushbutton to be labeled CLEAR. CLEAR pushbutton shall be to provide for all RF switch matrix switches in that row to be in the THRU position. 3.2.1.15 Repote clear Dushhutton. The function of the 3.2.1.16 Primary power source. The equipment shall b
37、e designed to operate from a primary oower source of 115 volts alternatina current (VAC) + 10 oercent. 60 hertz IHt) + 5 oercent ;ingle-phase. The total power required to opeiatethe equipmentshall not exceed 175 W. 3.2.1.16.1 Power cable assembl . !:IL-C-28777. Power cable connectionto The the input
38、 power cable assembl shall equipment shall be from de rear. be Type I of 3.2.2 Physical character i s t i cs. 3.2.2.1 Dimensions and weights. The maximum dimensions of the equipment shall not exceed the dimensions and weights shown in TABLE I, TPBLE 1. Maximum dimensions and weiqhts. 5 Licensed by I
39、nformation Handling ServicesNIL-S-2885LI 58 W 7999706 0355575 3 M r11-28854( EC) rl FIGURE 2. Switch matrix interlock control switching. 6 Licensed by Information Handling ServicesMIL-S-28854 58 9 3937706 0155596 5 DESCRIPTION OF SIGHAL AND INTERLOCK Connec tor pin Function A 8 C and D E and F G H M
40、IL-C-28854( EC) Plus 28 VOC originating in either multifunction or spare antenna to be switched to selected UHF transmitter SATCOM MODE CLOSED CONTACTS. Not required for dumny load, Return bus for signal A to multifunction or spare antenna unit. required for dumny load. HF keyline interlock signal a
41、nd return, originating in either HF trans- mitter or HF spare with both sides switched to selected antenna or dumny load connectors for total isolation between transmitters (see note). Plus 12 VDC in transmit signal and return, originating in selected UHF transmitter for activation of relays in both
42、 multifunction antennas in parallel. Not No switching required and not required for dumny load. UHF keyline interlock signal, origination in selected UHF transmitter to be switched in series to both multifunction antennas when either is selected, or switched separately to spare UHF antennas or dumny
43、 load. Return for signal 6 from antenna or dumny load to trnsmitter. switching required for antenna connection but switching is required for dumny load connection (see note). No NOTE: At the dumny load connector, pins G and H will be shared by both HF and UHF keyline interlock functions but shall be
44、 completely isolated by internal switching on each line. FIGURE 2. Switch matrix interlock control switching. (Continued) 7 Licensed by Information Handling ServicesMIL-C-28854( EC) 3.2.2.2 Protective cover. A protective cover shall be provided to protect the front panel manual override controls of
45、the RF switch matrix and the rear-mounted wafer switch niotor actuator assemblies. The design of both covers shall provide easy access and removal. 3.2.2.3 Interface connector location. Interface connectors shall be located on the rear olane of each unit. Interfacing RF connectors shall be placed a
46、ninimum of 5 cm (2 in) from each other and from external packaging protrusions so that external RF cables with conduit adapters of 5 un (2 in) in diameter may be connected. 3.2.2.4 Maintenance confiquration. moved outward on its slides for purposes of trouble-shooting, maintenance, and reconfigurati
47、on of antenna and transmitter connections. operational when pulled out for maintenance. The RF switch shall be designed to be capable of being The RF switch matrix shall be capable of being fully .3.2.3 Re1 iabil ity. 3.2.3.1 Quantitative re1 iabi 1 ity requirements. ?he upper test mean-time-between
48、-fai lures (MTBF) (O, as defined by MIL-STD-781) shall be 2200 hours. The lower test MTBF (Ol as defined by MIL-ST-781) shall be 1100 hours. of at least 50,000 cycles without maintenance or overhaul. Individual RF switch assemblies shall have a-life expectancy 3.2.4 Maintainability. 3.2.4.1 Quantita
49、tive corrective maintenance. The equipment shall have a mean-corrective- maintenance-time (Met) not exceeding 0.5 hours and a maximum-corrective-maintenance-time (Mmaxct), 95th percentile; not-exceeding 1.5 hours when corrective maintenance is accomplished at the organizational level of maintenance by the replacement of lowest subassemblies (modules, printed circuit boards (PCBs) and chassis-mounted parts (electronic, electrical, electromechanical, and mechanical parts). The corrective maintenance time includes localization, isolation, disassembly, interchange, reassembly, al
