1、MIL-G-LI727q bb = 9797706 0337573 3 MIL-G-49274( CR) 8 ikrch 1984 MILITARY SPECIFICATION GENERATOR, DIGITAL DATA SG-1139( )/G This specification is approved for use by the Communications-Electronics Command, Department of the Army, and is available for use by all Departments and AGencies of the Depa
2、rtment of Defense. 1. SCOPE AND DESCRIPTION 1.1 SCOPE. is portable and provides a test capability for digital transmission systems and 1.2 DESCRIPTION. The SG-1139( )/G is a piece of field test equipment used to test digital transmission aths and equipments. It performs its test by senaing receiving
3、 the signal after it has been over the path. It then counts the number of received bits that differ from the transmitted bits. One SG-1139( )/G can test a looped back system and two SG-1139( )/Gs can test a system end-to-end. 1 This specification covers Generator, Digital Data SG-1139( )/G which L e
4、quipments under conditions of tactical deployment. a repetitive test sicna1 2 P 5 - 1 bits long into the transmission equipment and It shall generate the digital test signal at bit rates which match the bit rates of ATACS channels (600 to 32,000 b/s), ATACS groups (576 Kb/s), TRI-TAC channels (16 an
5、d 32 Kb/s) and TRI-TAC groups (128 to 4608 Kb/s). It shall pro- vide a balanced conditioned diphase interface to match the ATACS and TRI-TAC channels, an unbalanced NRZ interface to match the ATACS groups, and a balanced _- NRZ interface to match the TRI.-TAC groups. In the loopback and station cloc
6、k modes and with the NRZ balanced interface, the SG-1139( )/G shall operate at any rate, externally supplied, between 2 Kb/s and 4915.2 Kb/s. The results Df the measurement shall be displayed in two ways. The first is a simple display consisting of three colored lamps. the transmission is good, and
7、it shall light if the Bit Error Rate (BER) is less than 10-5. The red lamp means that the transmission is bad, and it shall jight if the BER is more than 10-3. The yellow lamp shall indicate a marginal trans- mission, that is, a BER between 10-5 and 10-3. The second shall be a 7-digit numerical disp
8、lay of cumulative errors. Each error shall advance the count by one until the display reset button is pressed or the counter overflows. This shall give useful information in cases where the error rate is very low. The green lamp means that The SG-1139( )/G shall have internal sel f-checking features
9、. BITE sensors with LED indicators shill be used to locate faulty circuit card assemblies. A single error insertion button shall be provided to insure that the complete unit is worki ng properly. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of. use
10、in improving this document should be addresced $0 Commander, US Army Communications-Electronics Command, ATTN: DRSEL.-. ED-TO, Fort Nonmouth, New Jersey 07703 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.
11、Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-q7274 66 9 7997906 0337592 5 9 MIL-G-49274( CR) 1.2 DESCRIPTION (Cont.) The SG-1139( )/G shall be designed to be used in shel
12、ters and to be trans- ported between shelters by truck. Alternatively, it can be permanently mounted in a shelter. The SG-1139( )/G shall be mounted in a rugged case with transit cover. Four (4) plug-in circuit card assemblies shall contain the logic and interface ;ir- cui try. Two (2) adcti tional
13、plug-in circuit card assembl ies chal 1 provide the required power supply. The controls, indicators, and connectors shall Se on the front face of the unit, except for the power connector which shall be on tne rear. riate connectors on the SG-1139( )/G front panel to the shelter patch field. The chan
14、nel rate interfaces shall connect to the equipment under test by use of field wire. A ground stud is also provided on the rear surface of the unit. Access to the system under test shall be made by connecting the approp- 2. APPLICABLE DOCUMENTS 2.1 fication to the extent specified herein. The effecti
15、ve issue or revision of specifications and standards shall be those listed in the Department of Defense Index of Specifications and Standards (DODISS) and supplements thereto, unless a) specific issues are set forth herein, or (b) different issues than those ipecified in this specification are set f
16、orth in the solicitation. The date of the applicable DODISS and supplements thereto shall be as specified in the solicitation or contract. The issue in effect for drawings shall be as stated in the solicitation. ISSUES OF DOCUMENTS. The following documents form a part of this speci- - 2 f . Copyrigh
17、t Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-47274 bb = 77777Ob 0337573 7 W MIL-G-49274(CR) SPECIFICATIONS M I L I TARY 0 MIL-P-116 MIL-P-11268 MIL-M-13231 I MI L- F- 14072 MIL-S
18、-19500 MIL-P-28809 MIL-P-55110 MIL-E-55585 STANDARDS FED ERAL FED-STD-595 M I L I TARY MIL-STD-105 MIL-STD-252 MIL-STD-454 MIL-STD-461A Notice 4 MIL-STD-462 Notice 3 MIL-STD-471 Preservation - Packaging, Methods of Parts, Materials, and Processes Used in Electronic Equipment Marking of Electronic It
19、ems Finishes for Ground Electronic Equipment Semiconductor Devices, General Specification for Printed Wi ring Assembl i es Printed Wiring Assemblies Electronics Equipment and Parts, Packaging of Col ors Sampl i ng Procedures and Tab1 es for Inspect ion by Attributes Wired Equipment, Classification o
20、f Visual and Mechanical Defects Standard General Requirements for Electronic Equipment Electronic Emission and Susceptibility Requirements for the Control of Electromagnetic Interference Electromagnetic Interference Characteristics, Measurements of Maintainability Demonstration 3 Copyright Communica
21、tions - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ MIL-G-49274 66 7979706 0337574 7 MIL- 6-49274 (CR) STANDARDS (Cont. ) MIL-STD-721B MIL-STD-726 MIL-STD-7818 MIL-STD-810 MIL-STD-1332 MIL-STD-45662 D
22、RAW I NGS B4027000 SM-D-884567 SM-D-884579 84027002 84027006 84027010 B4027014 B4 O27 O2 2 B4027042 84027043 84027047 B4027048 SC-DL-525135 SM-D-571590-1 B4027049 B4027018 Definitions of Effectiveness Terms for Reliability, Maintainability, Human Factors and Safety Packaging Requirements Code Re1 i
23、abil i ty Tests, Exponential Distribution Envi ronmental Test Methods Definitions of Tactical, Prime Prec of Termi no1 ogies for C1 assi fi cati on Electric Power Engine Generator Set Calibration Systems Requirements Generator, Digital Data SG-1139( )/G CCA, Multi VDC CCA, AC Input CCA, Transmi t -
24、1 CCA, Transmit 2 CCA, Receive 1 CCA, Receive 2 Cover Accessory Assembly Cover Assembly Front Control Fil ter Assembly Interface Box Assembly Cab1 e Assembly Coaxial AC Power Cable Assembly, CX-11727 Adapters, BNC to Banana Plug Angle Assembly Mounting Case Assembly Electrical Equipment se, and Util
25、ity of the DD Mobile Family (Copies of specifications, standards, drawings and pub1 ications required by contractors in connection with specific procurement functions should be obtained From the procuring activity or as directed by the contracting officer.) 4 Copyright Communications - Electronics C
26、ommand Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-Ll7274 66 777770b 0137575 O W I MIL-G-49274( CR) 3. REQUIREMENTS 3.1 FIRST ARTICLE (See 4.3). the contractor shall furnish first article units in accordance with 4.3
27、. When specified in the contract or purchase order, 3.2 CONSTRUCTION. 3.2.1 Fabrication. The equipment shall be constructed in accordance with DL-B4027000 and the requirements specified therein. 3.2.2 Unit Serial Numbers. The SG-1139( )/G shall have consecutively assigned serial numbers unless other
28、wise specified by the contracting officer. 3.2.3 Printed Wiring. MIL-P-55110 and MIL-P-28809. The printed wiring shall meet the requirements of 3.2.4 Semiconductor Devices. The semiconductor devices chal 1 meet the require- ments of MIL-S-19500. 3.3 PARTS, MATERIALS, AND PROCES.SES - GENERAL. Unless
29、 otherwise specified herein. Darts. materials and orocesses shall be as shown on the drawings specified in 2. apply. The paragraphs of MIL-P-11268 which are applicable to equipment of established design shall be followed. Submission of data shall be IAW applicable contract provisions. 3.4 FINISH. Th
30、e equipment shall be finished in accordance with MIL-F-14072 and drawings specified in 3.2. 3.5 MARKING. The marking shall conform to MIL-M-13231, with approvals in accordance with requirements specified in the contract or purchase order. If a change or substitution is required, MIL-P-11268 shall 3.
31、5.1 Serial Numbers. Serial numbers shall be required on each nomenclatured item, except cords and cables. 3 . 6 3.6.1 Bounce Preconditioning. (See 4.6.1) Each assembled SG-1139( )/G shall meet the requirements specified herein without subsequent processing after submission to the bounce precondition
32、ing of para. 4.6.1. Each SG-1139( )/G shall be subjected to this process. PRECOND I TI ON I NG 3.6i2 Electrical Preconditioning. (See 4.6.2) Prior to submission to the specified quality conformance inspections, each assembled SG-1139( )/G consist- ing of the chassis, plug-in panel circuit card assem
33、blies and control filter assemblies shall be electrically preconditioned for a minimum of 48 hours operat- ing time. The last 24 hours of electrical preconditioning shall be failure free. Each unit fabricated shall be subjected to this process. Copyright Communications - Electronics Command Provided
34、 by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-G-47274 bb W 979790b 0337596 2 MIt-G-49274( CR) 3;7 ELECTRICAL. (See 4.7) 3.7.1 General Characteristics (See 4.7.1) Generator, Digital Data SG-1139( )/G shall produce and accept a p
35、seudo-random data stream for the detection and display of errors induced during transmission. 3.7.2 Data Rates and Interfaces. (See 4.7.2) 3.7.2.1 Balanced Conditioned Diphase Modulated. The SG-1139( )/G shall provide and accept balanced conditioned diphase modulated data at rates of 0.6, 1.2, 2.4,
36、4.8, 9.6, 16 and 32 kilobits per second - -tO.OOl percent in accordance with the following interface criteria: 3.7.2.1.1 Driver Output Impedance. The driver output impedance shall be 100 ohms - +15%. 3.7.2.1.2 Driver Output Voltage. When loaded with a 100 ohm dummy load, the line-to-line voltage sha
37、ll be 400 mv minimum and 4 volts maximum, peak-to-peak. When loaded with a 2400 ohm dummy load, center tapped to ground, the line-to- ground voltage magnitude shall not exceed 2 volts. 3.7.2.1.3 Driver Output Voltage Waveshape. When loaded with a 100 ohm dummy load, the rise and fall times (between
38、10% and 90% of the peak-to-peak voltage) shall be at least 0.78 usec and no more than 3.3 usec. of inflection prior to achieving 100% amplitude. There shall be no points 3.7.2.1.4 Input Voltage Range. A voltage between t50 mv and t3 volts shall cause the terminator to assume the mark state, and a vo
39、ltage between -50 mv and -3 volts shall cause the terminator to assume the space state. 3.7.2.1.5 Operation. The terminator shall operate with line-to-ground signal peak voltage magnitude up to 3 volts, and line-to-ground DC voltage up to 56 volts. 3.7.2.1.6 Protection. Interface circuit protection
40、chal 1 be provided so that any driver or terminator shall not be damaged by occurrence of any of the fol 1 owi ng cont i ngenci es : a. b. c. d. Voltage magnitude of less than or equal to 56 volts applied between any lead and ground. Shorting of any leads of this interface,to any other lead or to gr
41、ound. Opening of either or both of the input or output leads. Application of a voltage transient through a surge impedance of 100 ohms between any lead and ground having the following wave shapes: (1) A 1000 volt peak of either polarity, a rise to peak time of 5 microseconds, and a decay time to 50%
42、 of peak of 600 microseconds. (2) A -350 volt peak of either polarity, a rise to peak time of 10 microseconds, and a decay time to 50% of peak of 2000 microseconds. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permi
43、tted without license from IHS-,-,-MIL-G-49274 bb W 7799706 0337577 4 W MOD E 1- TEMPERATURE RANGE NUMBER OF CHANNELS I MIL-G-49274( CR) TIME .RANGES (NS) * L e e 12 Temperatures (+125F) Low Temperature (-25F) 3.7.2.1.7 Performance in the Presence of Noise. A driver connected to a terminator shall op
44、erate without error in the presence of longitudinal interference or a dc common return offset. With +2 volts peak sinusoidal interfering signal at a frequency of 32 KHz and a-DC offset voltage of t56 volts present longitudinally, i .e., algebraically added to both terminator input terminals simultan
45、eously with .respect to the common return. o to +loo 3.7.2.2 Unbalanced Non-Return to Zero. The SG-1139( )/G shall provide and accept unbalanced non-return to zero (IIRZ) data at 576 kilobits per second - +0.001 percent with associated timing signals in accordance with the following interface criter
46、ia: 3.7.2.2.1 Impedance Requirements. The output impedance of drivers and the input impedance of terminators shall be 91 ohm - +10 percent. 3.7.2.2.2 Pulse Code Modulation (PCM OUT). The pulse width of the signal shall be 1.7 +0.1 microseconds. The rise and fall times shall be 20 to 120 nanoseconds
47、- (nsj. A digita “1“ shall be a level between -0.4 V and +0.4 V. Ripple at either level chal be less than - +0.4 volts peak. A digital “0“ shall be a level between -2.2 and -2.6 volts. The frequency of the signal shall be 576 KHz shall be 80 to 150 ns. The rise and fall t Ripple at the baseline shal
48、l be with 3all be 20 to 120 ns. The signal shall have a pulse peak 1.8 to 2.6 volts above a baseline of -2.0 to-2.3 volts. +.5 volts. - mes n 3.7.2.2.4 Phasing of PCM OUT and TIM OUT Signals. The leading edge of the TIM OUT pulses shall lead the transitions in the PCM OUT signal by the time ranges a
49、t the various temperatures as shown in the following phasing chart: 3.7.2.3 Balanced Non-Return-to-Zero. The SG-1139( )/G shall provide and accept balanced non-return-to-zero (NRZ) data with associated square wave timing at rates of 128, 144, 256, 288, 512, 576, 1024, 1152, 1536, 2048, 2304, 4096 and 4608 Kb/s. Interface characteristics shall be as follows: 7 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for
