ARMY MIL-M-49235 A-1988 MODEM DIGITAL DATA MD-1065 G《MD-1065 G数码驱动器调制解调器》.pdf

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1、MIL-M-49 235A (CR) 29 Arril 1988 SUPERSEDING MIL-M-49235 (CR) 19 November 1981 . MILITARY SPECIFICATION MODEM, DIGITAL DATA, MD-1065/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 o

2、f the Department of Defense. 1. SCOPE 1.1 distribu- tion is unlimited. THIS DOCUMENT CONTAINS xg PAGES. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SPECIFICATIONS Military MIL

3、-P-116 MIL-P-11268 MIL-M-13231 MIL-F-14072 MIL-E-55585 STANDARDS Military MIL-STD-105 MIL-STD-252 MIL-STD-454 MIL-STD-461A Notice 4 MIL-STD-462 Notice 3 MIL-STD-781C MIL-STD-810D MIL-STD-1332 MIL-STD-2073-2 MIL-STD-45662 Preservation, Methods of Parts, Materials, and Processes Used in Electronic Equ

4、ipment Marking of Electronic Items Finishes for Ground Electronic Equipment Electronics Equipment and Farts, Packaging of Sampling Procedures and Tables for Inspection by Attributes Classification of Visual and Mech- anical Defects for Equipment, Electronic, Wired, and Other De- vices Standard Gener

5、al Requirements for Electronic Equipment Electromagnetic Interference Charac- teristics, Requirements for Equip- ment Electromagnetic Interference Charac- teristics , Measurements of Reliability Tests, Exponential Dis- tribut ion Environmental Test Methods and Engineering Guidelines Definitions of T

6、actical, Prime, Pre- cise, and Utility Terminologies for Classification of the DOD Mobile Electric Power Engine Gen- erator Set Family Packaging Requirements Code Calibration System Requirements 8 2 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleN

7、o reproduction or networking permitted without license from IHS-,-,-MI L-M- 4 9 2 3 5A ( C R) 2.1.2 Other Government documents, drawinqs, and publi- cations. The following other Government documents, drawings, and publications form a part of this specification to the extent specified herein. Unless

8、otherwise specified, the issues shall be those in effect on the date of the solicitation. SPECIFICATIONS Communications-Electronics Command CR-CX-017 3-00 1 Nuclear Survivability/Vulnerability Provisions for the Family of Digital Group Multiplexer Equip- ments DRAWINGS Communications-Electronics Com

9、mand SM-D-875948 SM-D-876000 SM-D-876111 DL-SM-B-876240 SM-D-884454 SM-D-884567 SM-D-884579 SM-D-884593 Circuit Card Assembly (CCA), BITE 1 CCA, Multiplexer CCA, Demux Modem, Digital Data, MD-l065/G CCA, Regenerator CCA, Multi VDC CCA, AC Input CCA, 5 VDC (Copies of specifications, standards, drawin

10、gs, publications and other Government documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Order of precedence. In the event of a conflict between the text of this specifi

11、cation and the references cited herein, (except for associated detail specifications, specification sheets or MS standards), the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has b

12、een obtained. 3 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_-_1_ MIL-M-47235A 58 W 7777906 0363537 L W 3. REQUIREMENTS 3.1 First article units. When specified in the contract

13、 or purchase order, the contractor shall furnish first article units - in accordance with 4.3. 3.2 Construction. 3.2.1 Fabrication, The equipment shall be constructe in ac- cordance with DL-SM-B-876240, and the requirements specified herein. 3.2.2 Printed wirinq. The printed wiring shall meet the re

14、- quirements of MIL-STD-454, Requirement 17. 3.2.3 Semiconductor devices and inteqrated circuits. The semiconductor devices and integrated circuits shall meet the requirements of MIL-STD-454, Requirements 30 and 64. 3.3 Parts, materials, and processes - qeneral. (See 4.4) In addition to the requirem

15、ents of this specification, the require- ments of MIL-P-11268 including the selection requirements therein shall apply. 3.4 Finish. The equipment shall be finished in accordance with MIL-F-14072 and DL-SM-B-876240. 3.5 Markinq. The marking shall conform to MIL-M-13231, with approvals in accordance w

16、ith requirements specified in the contract or purchase order. 3.5.1 Serial numbers. A u ique serial number is required on each nomenclatured item an CCA. The numbers .shall be consecutively assigned. 3.6 Electrical preconditioninq (burn-in). (See 4.6) Prior to submission to the specified quality con

17、formance inspections, each assembled MD-l065/G unit shall be electrically preconditioned for a minimum of 48 hours operating time. The last 24 hours of electrical preconditioning shall be failure free. Each unit fabricated shall be subjected to this process. Failure free is defined as (1) no bulit-i

18、n test equipment (BITE) alarms during burn-in and (2) the successful completion of the operational test of 4.7.11 after burn-in. 4 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-

19、3.7 Electrical. (See 4.7) 3.7.1 Balanced equipment-side siqnal characteristics. (See 4.7.1) 3.7.1.1 Line-to-line voltaqe levels. (See 4.7.1.1) The line- to-line voltage shall be between tO.1 and +4.0 volts for a digital 1 and between -0.1 and -4.0 for a digital O, measured into a 100- ohm dummy load

20、. For the 2 kb/s data and timing outputs, the minimum voltage measured into a 100-ohm dummy load shall be +0.5 volts for a digital 1 and -0.5 volts for a digital O. 3.7.1.2 Line-to-qround voltaqe. (See 4.7.1.2) The magnitude of the line-to-ground voltage shall not exceed 3 volts. 3.7.1.3 Clock/data

21、phasinq. (See 4.7.1.3) For those data signals having a related clock signal, the time difference between the upward transition of the clock signal and either the upward or downward transition of the data signal shall be no greater than 229 ns for group rate signals, or 21500 ns for 2 and 16 kb/s sig

22、nals. Times shall be measured at the zero voltage point of signals. 3.7.1.4 Offset. (See 4.7.1.4) The magnitude of the offset voltage measured between the center tap of a 100-ohm dummy load and ground shall not be greater than 3 volts. 3.7.1.5 Siqnal balance. (See 4.7.1.5) The magnitude of the diffe

23、rence between the magntiudes of the digital 1 level and the digital O level shall not be greater than 10% of the larger of the two. 3.7.1.6 Slew rate. (See 4.7.1.6) When 100 feet of RG-108 A/U cable terminated in a 78-ohm dummy load is connected to the driver output, the transition between +40 mV (e

24、ither direction) shall take no more than 10 ns for group rte signals and 100 ns for the 2 and 16 kb/s signals. 5 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-q7235A 58 79

25、77706 OLbL5I.IL T m I 3.7.1.7 Receiver dynamic ranqe. (See 4.7.1.7) The receiver shall deliver the proper digital output when a line-to-line voltage of +50 mV to +4 volts for a digital 1 or -50 mV to -4 volts for a digital O is applied to the receiver input terminals. 3.7.1.8 Input load impedance. (

26、See 4.7.1.8) The input impedance shall be 100 ohms 210%. 3.7.1.9 Clock asymmetry. (See 4.7.1.9) The positive half of the clock waveform shall be equal to half the period 215 ns for group rate timing signals and +i500 ns for 2 and 16 kb/s timing signals. 3.7.1.10 Unloaded output. (See 4.7,1.10) For t

27、he 2 kb/s data and timing outputs, the maximum voltage into an open circuit shall be +3.0 volts for a digital 1 and -3.0 volts for a digital O. 3.7.2 Radio side interface. (See 4.7.2) The radio side interface, which shall interface with a full-duplex digital group plus digital orderwires, connects t

28、o a Radio Set AN/GRC-l03(V). Provision shall be made to connect the radio side input-autput to an AN/GRC-103 via 91 ohm coaxial cable connectors on the back of the unit. 3.7.2.1 Transmit video siqnal. (See 4.7.2.1) The transmit video signal characteristics shall be as follows: a. Waveform: NRZ. b. T

29、ransmit level measured into 91-ohm load: 2 V p-p - +lo%. c. Rise and fall times: 160 to 280 ns, d. Polarity: A digital 1 shall be more positive than a digital O. 3.7.2.2 Receive video sisnal. (See 4.7.2.2) The receive video signal characteristics shall be as follows: a. Waveform: Binary at 640 kb/s;

30、 biternary at 1280 kb/s. b. Receive level: 0.5 to 2 V p-p. c, Input impedance: 91 ohms 210%. 6 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-M-47235A 58 7779706 0363542 L M

31、IL-M-49235A(CR) I 3.7.2.3 Analoq orderwire siqnal (See part of 4.7.7). The analog signal shall be nominal 16% and shall not be greater than 20% of the digital signal, both signals being measured on a peak- to-peak basis. The analog orderwire appears with the receive video signal only. 3.7.3 Analoq o

32、rderwire interface. (See 4.7.3) Each modem module shall provide to the AN/GRC-103 an analog orderwire signal recovered from the receive radio side interface. The characteristics of the signal shall be as specified in the balance of this paragraph. 3.7.3.1 Output impedance. (See 4.7.3.1) The output i

33、mpedance shall be 600 ohms 510% balanced. 3.7.3.2 Output level. (See 4.7.3.2) The output level shall be -4 dBm 52 dB for an input level of 53 mV. 3.7.3.3 Siqnal-to-noise ratio (SNR) (See 4.7.3.3) The signal-to-noise ratio shall be 25 dB C-message weighted. 3.7.3.4 Orderwire control interface. (See 4

34、.7.3.4) Each modem module shall provide an orderwire control connection, one for each module installed. It shall be a contact closure with the normal state being closed. When the modem cannot detect timing in the input signal from the radio or loses unit power, the orderwire control contacts shall o

35、pen. The orderwire control shall operate in conjunction with the RS alarm. The control allows the AN/GRC-103 to use its analog orderwire in the absence of digital traffic. 3.7.4 Frame search inhibit interface. (See 4.7.4) This interface shall consist of a signal from each module, It shall be connect

36、ed to a load which consists of a pull up resistor connected to a pull up voltage. Proper operation shall be achieved with a pull up resistance between 1000 and 51,000 ohms and a pull up voltage between +4.5 and +5.5 volts. Proper operation shall be defined as the voltage being between O and +0.8 vol

37、ts when the search is to be inhibited and not less than +2.0 volts when the search is to be permitted. 7 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Y 3.7.5 Alarm interface. (

38、See 4.7.5) The modem case shall generate and provide external connections for S, SA, and RS alarms as defined in 3.7.5.1. The alarm connections shall be contact closures with the closed state indicating alarm. 3.7.5.1 BITE and alarms. The BITE shall monitor signals in and out of the unit and interna

39、l circuits and power supply voltages. The BITE shall operate without interrupting traffic or interfering with normal system operation. Alarm conditions are removed automatically when proper operation is restored. Failures detected by the BITE circuitry cause relay contact closures accessible externa

40、lly at a connector on the rear panel. Means shall be provided in the unit to check the operation of the alarms without interrupting the equipment operation. The following outputs are available: a. S alarm. The S alarm shall indicate any failure detected including loss of input power. This alarm shal

41、l also provide a visible indication on the front panel, except for input power failure. b. SA alarm. The SA alarm shall indicate that the malfunction is within the unit. Loss of input radio signal shall inhibit the SA alarm. A loss of signal on one radio input shall suppress only the SA alarm origin

42、ating in the equipment associated with that radio input. SA alarms associated with a nonfailed radio input shall not be suppressed. If the power switch is set to OFF, there shall be no SA alarm. c. RS alarm. The RS alarm shall indicate loss of signal coming in from the radio. If the unit loses power

43、, the RS alarm shall assume its normal state. This alarm shall inhibit the SA alarm on the failed group. 3.7.6 Prime power interface. (See 4.7.6) The ac primary power source shall be 115 V 210% at frequencies of 50 Hz, 60 Hz, and 400 Hz f5%, single phase. The power input to the unit shall not exceed

44、 90 watts. The ac primary power shall conform to MIL- STD-1332 for Type I, Class 1 and 2, Mode I, II, and III generator sets. 8 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Att

45、enuation, dB Frequency, kHz Min. Max. MIL-M-49235A 58 3999906 0363544 5 3.7.7 Siqnal detection. (See 4.7.7) a. Pulse shapinq in the radio. The filtering encountered in the radio shall conform to the following: 10 180 240 360 480 720 960 Reference 1.3 2.2 2.5 4 5.7 8 10.2 13.5 23.1 30.5 41.2 52.5 b.

46、Error rate. The receive portions of the modem shall be capable of detecting band-limited Gaussian-shaped pulses of a binary or biternary input video signal which have been shaped by the filter. The error rate versus signal-to-noise ratio measured at the AN/GRC-103 modem radio side input with the rad

47、io level set so that no clipping is visible, shall be as follows: Peak-signal-to-rms-noise ratio dB Probability of Error Binary Bi ternary 10-3 16 23.5 10-6 20.5 28.5 10-7 -25 -34 The noise band shall also be shaped by the filter. The error rate shall be met with a 1 kHz orderwire signal present at

48、16% of the digital signal level, peak-to-peak basis. 3.7.8 Timins. (See 4.7.8) In normal operation, each modem shall use related timing at the group rate for transmit timing. When the selected timing fails, the modem shall automatically transfer to an internal master timing source to keep the digita

49、l voice orderwire (DVOW) and the data orderwire (DOW) operating. The accuracy of the internal timing shall be within 515 ppm of the nominal radio rate. In normal operation, the modems receive timing shall be derived from the radio side input. When the radio side input is missing, the modem shall provide group and DVOW 9 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo