1、MIL-C-28843A( EC I I 11 May 1981 SUPERSEDING * a a MIL-C-28843A 5 377770b 0355373 b MIb-C-28843(EC) . 28 February 1978 (See 6.4) MILITARY SPECIFICATION CONTROL UNITS, REMOTE SWITCHING, C-l0315/U and C-l0979/U This specification is approved for use by the Naval Electronic Systems Command, Department
2、of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the performance, production, and testing requirements for Remote Switching Control Units C-l0315/U and C-l0979/U for use with shipboard secure voice commu
3、nications systems. 1.2 Classification. The control units shall be of the following types, as specified (see 6.2.11: Type I - For use with surface ships. Provides programming capability for nine Type II - For use with smallcraft and submarines. telephone sets and five channels. three telephone sets a
4、nd three channels. Provides programming capability for 2. APPLICABLE DOCUMENTS 2.1 Government documents. The following documents, of the issue listed in the Department of Defense Index of Specifications and Standards (DoDISS) and its supplements, form a part of this document to the extent specified
5、herein. thereto shall be as specified in the solicitation. The date of the applicable DoDISS and supplements SPEC IF I CATIONS MIL I TARY MIL-S-901 MIL- E- 16400 MIL-E-17555 STANDARDS FEDERAL FED-STD-595 Shock Tests, H.I. (High-Impact) Shipboard Machinery, Equipment And Systems , Requirements For El
6、ectronic, Interior Communication And Navigation Equipment, Naval Ship And Shore, General Specification For Electronic And Electrical Equipment, Accessories, And Repair Parts, Packaging And Packing Of Color Beneficial comments (recommendat ions, additions, del et ions) and any pertinent data which ma
7、y be of use in improving this document should be addressed to: Commander, Naval Electronic Systems Command (ELEX-5043) , Washington, D.C. 20360, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. FSC 5840 t US
8、. GOVERNMENT PRINTING OFFICE 1981-703-023/3560 _- .- A , Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2LI3A -5 777770b 0255372 m- MI L-C-28843A ( EC) MIL I TARY MIL-STD- 105 MI L-STD-109 MI L- STD-46 1 MIL-STD-462 MIL-STD-471 MIL-STD-781 MIL
9、-STD-965 DoD-STD-1399, Section 300 DRAW1 NGS MI LI TARY NAVAL ELECTRONIC SYSTEMS COMMAND DL 76E5N100 DL 80E2N100 Sampling Procedures And Tables For Inspection By Attributes Quality Assurance Terms And Definitions Electromagnetic Emission And Susceptibility Requirements For The Control Of Electromagn
10、etic Interference Electromagnetic Interference Characteristics, Measurement Of Maintainability Demonstration Reliability Design Qualification And Production Acceptance Tests: Exponent i al Di str i but ion Parts Control Program Interface Standard For Shipboard Systems, Electr 9c Power , Al ternat in
11、g Current (Metric) Data List, Remote Switching Control C-l0315/U Data List, Remote Switching Control C-10979/U (Copies of specifications, standards, and drawings required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by
12、 the contracting officer.) 3. REQUIREMENTS 3.1 General, extent specified herein. The control units shall conform to the requirements of MIL-E-16400 to the 3.2 Classification of requirements. The requirements for the control units are classified as follows: Requirement . Paragraph First art i cle Par
13、ts , mater i al s , and processes Design and construction Reliability Maintainability Performance characteristics Environmental requirements Electromagnetic interference and electromagnetic compatibility Physical requirements Color and finish Workmanship 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.
14、13 3.3 First article When specified (see 6.2.1), the contractor shall furnish sample unit(s) for first article inspection and approval (see 4.3 and 6.3). 3.4 Parts, materials, and processes. the control units shall conform to the requ 3.4.1 Parts control. The parts to be in accordance with MIL-STD-9
15、65, Procedure I Parts, materials, and processes used in production of remen ts of MIL- E-16400. incorporated in the control units shall be controlled Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-288Ll3A 58 W 7779906 0155173 T W MI L-C-28843A
16、 ( EC ) 3.5 Design and construction. Design and construction of the control units shall be in conformance with the requirements of MIL-E-16400 and drawing (DWG) DL 76E5N100 for Type I control units and DWG DL 80E2N100 for Type II control units to the extent specified herein. units shall be manufactu
17、red in accordance with the drawings and specifications listed in DWG DL 76E5N100 and related lists for Type I control units and in DWG DL 80E2N100 and related lists for Type II control units, except insofar as errors of omission or commission on the drawings may be incompatible with the requirements
18、 of this specification. The control 3.5.1 Control unit composition. a. Control panel b. Audio amplifiers c. Power supply 3.5.1.1 Control panel. The control units shall consist of the following: The control panel shall contain the necessary controls, indicators, The panel shall contain a and switches
19、 required to conform to the requirements specified herein. matrix type array of: a. Type I - 54 il b. Type II - 12 il 3.5.1.2 Audio amplifier. transmit and the receive mode. as specified in 3.8.8.1 and 3.8 uminated pushbutton switches uminated pushbutton switches Each amplifier card shall provide fo
20、r amplification in the Characteristics of the transmit and receive amplifiers shall be 8.2. 3.5.1.2.1 Type I. 3.5.1.2.2 Type II. 3.5.1.3 Power sup 1 . Five plug-in, solid-state audio amplifier cards shall be provided, one for each channel. for each channel. Three plug-in, solid-state audio amplifier
21、 cards shall be provided, one A 24 volts direct current (VDC) regulated power supply shall be provided to supp + y power to external equipment connected to the control units (see 3.8.6). 3.5.2 Electrical power requirements. Type I and Type II control units shall conform to the electrical requirement
22、s specified in 3.5.2.1 through 3.5.2.6. 3.5.2.1 Primary power supply line voltage. The control units shall be designed to operate from shipboard alternating current (AC) power as specified in Section 300 of DoD-STD-1399, nominal. The control units shall also be capable of operation from an external
23、+24 VDC - +5 percent source (not specified in this specification). 3.5.2.2 Transient voltage. The control units shall conform to the transient voltage requirements of MIL-E-16400. 3.5.2.3 Electrjcal bonding. The control units shall conform to the electrical bonding requirements of MIL-E-16400. 3.5.2
24、.4 Internal cabling. The control units shall conform to the internal cabling requirements of MIL-E-16400. 3.5.2.5 Wire terminations. The control units shall conform to the wire termination requirements of MIL-E-16400. 3.5.2.6 Blown fuse indicators. Blown fuse indicators are not required. 3 Provided
25、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-28843A 58 a 777770b 0155174 1 a RIL-C-Z8843A( EC) 3.5.3 Front panel layout and arrangement of operating controls. Front panel layout and arrangement of operating controls shall provide the following: a. Ty
26、pe I: 1. Pushbutton switches for interconnection of up to nine remote telephone sets to up to five secure radio channels. cascaded with other units by transfer switches, thus providing for expanded switching capability. A locking mechanism to lock the front panel switches in the selected pos it ions
27、. Pushbutton switches for interconnection of up to three remote telephone sets to up to three secure radio channels. A locking mechanism to lock the front panel switches in the selected posit ions. The unit shall be capable of being 2. b. Type II: 1. 2. 3.5.4 Cable entrances. Cable entrances shall b
28、e provided on top, botton, and two sides of the case, conforming to the cable entrances specified in DWG DL 76E5N100 for Type I control units and top and two sides of the case, conforming to the cable entrances specified in DWG DL 80E2N100 for Type II control units. 3.5.5 Safety. The control units s
29、hall be in accordance with the requirements of the Safety criteria paragraph of MIL-E-16400. 3.6 Re1 iabi 1 i ti. 3.6.1 Quantitative reliability requirement. The specified upper test mean-time-between- failures (MTBF) (eo as defined in MIL-STD-781) for Type I and Type II control units shall be 1500
30、hours. The lower test MTBF (01 as defined in MIL-STD-781) shall be 500 hours. 3.7 Ma i n t a i nab i 1 i tl. 3.7.1 Quantitative maintainability requirements. Repairs for Type I and Type II control The control unit mean-corrective-maintenance-time (Met) units shall be accomplished by replacement of l
31、owest subassemblies (modules or printed wiring assemblies) or chassis-mounted parts. shall be as follows: a. Type I. Not exceeding 90 minutes b. Type II. Not exceeding 30 minutes 3.8 Performance characteristics. The control units shall conform to the performance 3.8.1 Switching requirements. All swi
32、tch contacts shall conform to the following characteristics specified in 3.8.1 through 3.8.8.2. characteristics: a. Resistance (switch closed). 5 ohms maximum 6. Resistance (switch open). 100 kilohms (kohmc) minimum c. Current. One ampere maximum, noninductive 3.8.2 Switching function characteristic
33、s. 3.8.2.1 Type I. The pushbutton with which the switching function is performed shall be arranged in a rectangular matrix consisting of six rows and nine columns. counting from the top down, shall be associated with secure radio sets one through five, respectively. through nine shall be associated
34、with remote telephone sets one through nine, respectively. depressing of any one switch in rows one through five in a vertical column shall connect the radio associated with that respective row with the telephone associated with the selected Rows one through five, Row six shall be associated with th
35、e transfer and release functions. Columns one The 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M IL - C - 2 8 8 4 3 A- 58 m 9999906 0155175 3 M RIL-C-Z8843A( EC) to column. pushbutton in that respective column and shall transfer the remote telep
36、hone set connected that column to the cascaded switching unit. Depressing a pushbutton in row six shall release any previously depressed. 3.8.2.2 Type II. The pushbuttons with which the switching function is performed sha 1 be arranged in a rectangular matrix consisting of four rows and three column
37、s. four, counting from top down, shall be associated with secure radio sets one through three, respectively. shall connect the radio associated with that respective row with the telephone associated with the selected column. in that respective column. pushbutton in a vertical column can be depressed
38、 at any time. Rows two through The depressing of any one switch in rows two through four ina vertical column Depressing a pushbutton in row one shall release any depressed pushbutton 3.8.3 Interlock. Type I and Type II control units shall be designed so that only one 3.8.4 Input interface characteri
39、stics. The input interface for both Type I and Type II control units shall be capable of operating with the input signals as specified in 3.8.4.1 and 3.8.4.2, and providing the signals in 3.8.4.3 through 3.8.4.5. 3.8.4.1 Transmit audio. The telephone set shall provide an audio signal with the follow
40、ing characteristics: a. Level from telephone. -6 decibels referred to one milliwatt (dBm) average, b. Frequency characteristic of telephone. Flat within 8 decibels (dB) peak-to-peak c. +14 dBm peak from 200 hertz (Hz) to 4 kilohertz (kHz) .Transmit input impedance. 600 ohms - +10 percent at 1 kHz ba
41、lanced 3.8.4.2 Receive audio. The radio set shall provide an audio signal with the following characteristics: a. Level from radio. O dBm average, t20 dBm peak b. c. Frequency characteristic of radio. 4 kHz Receive input impedance. Flat within 6 dB peak-to-peak from 200 Hz to 600 ohms - +10 percent a
42、t 1 kHz, balanced 3.8.4.3 Disconnect signal. A disconnect signal shall be provided at the telephone interface when no connection to the telephone is made on the matrix switches. shall conform to the following characteristics: The interface a. b. Disconnect. - +20 percent Connect. +24 volts (V) 210 p
43、ercent with series resistance of 150 ohms Ground with a series resistance of 150 ohms - +20 percent 3.8.4.4 Plus 24 VDC. Plus 24 VDC shall be supplied to each telephone, unswitched, and 3.8.4.5 Signal ground. derived from the power supply specified in 3.5.2.1 or 3.8.6. Each telephone interface shall
44、 have a terminal for signal ground. 3.8.5 Output interface characteristics. The output interface characteristics for both Type I and Type II control units shall be as specified in 3.8.5.1 through 3.8.5.3. 3.8.5.1 Transmit audio. The transmit audio to the radio shall conform to the following characte
45、ristics: a. Level to the radio. -6 dBm average, +14 dBm peak b. Frequency response. from 200 Hz to 4 kHz reference to the input signal with a minimum rolloff of -20 d per decade. Transmit output impedance. Frequency response shall be flat within 6 dB peak-to-peak c. d. Distortion. Three percent maxi
46、mum 600 ohms - +10 percent at 1 kHz, balanced 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI L-C-28843A ( EC ) - e. *Noise. The signal-to-noise ratio shall be greater than 40 dB referenced to a O dBm signal level. Noise shall be considered hum
47、and any other extraneous signal. All inputs and outputs including the one under test shall be terminated into 600 ohms - +10 percent Gain. f. The gain shall be unity +O dB, -3 dB measured at 1 kHz. 3.8.5.2 Receive audio. The receive audio to the telephone shall conform to the following characteristi
48、cs: a. b. c. Receive output impedance. 30 ohms maximum, balanced d. Distortion. F.ive percent maximum e. Noise. The signal-to-noise ratio shall be greater than 40 dB referenced to a O dBm input signal level. Noise shall be considered hum and any other extraneous signal noise. terminated into 600 ohm
49、s +10 percent Gain. Level to the telephone. Frequency response. shall be flat within 7 dB peak-to-peak from 200 Hz to 4 kHz reference to the input signal with a minimum rolloff of -20 dB per decade. O dBm average, t20 dBm peak With a load of 30 ohms to 600 ohms the frequency response All audio inputs and outputs including the one under test shall be f. The gain shall be nity +O dB, -6 dB measured at 1 kHz. 3.8.5.3 Plus 24 VDC. 3.8.6 Internal power supply. Plus 24 VDC shall be su
