1、Beneficial comments (recomnendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Space and Naval Warfare Electronic Systems Cornand (SPAWAR-8111), Washington, DC 20363-5100, by using the self-addressed Standardizatio
2、n Document Improvement Proposal (DO Form 1426) appearing at the end of this document, or by letter. FSC 5820 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. lrlIL-R-28886A(EC) %F-EGi% MIL-R-28886( EC) MILITARY SPECIFICATION RECEIVER, LOW FREQUENCY, MEDIUM FREQUENCY,
3、 AND HIGH FREQUENCY COMMUNICATIONS 30 August 1984 This specification is approved for use by the Space and Naval Warf-are Systems Comnand, Department 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 o
4、perational characteristics, test, and acceptance requirmenmr a low frequency (LF), medium frequency (MF), and high frequency (HF) Comnunications Receiver, hereinafter referred to as the receiver. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwise s
5、pecified, the following specificat.ns and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified herein. SPEC IF I CATIONS MILITARY MIL-S-901 MIL-C
6、-915 MIL-E-16400 MIL-E-17555 MIL-E-21981 MIL-C-24056 MIL-P-28809 MIL-C-39012 MIL- I - 46058 Shock Tests, H.I. (High-Impact); Shipboard Machinery, Equipment Ani! Systems, Requirements For Cable And Cord Electrical, For Shipboard Use, General Specification For Electronic, Interior Comnunication And Na
7、vigation Equipment, Naval Ship And Shore: General Specification For Electronic And Electrical Equipment, Accessories, And Repair Parts; Packaging And Packing Of Electronics Type Designations, Identification Plates And Markings: Requirements For Cabinets, Electronic Equipment, CY-4516(A)/S And CY-451
8、6(B)/S (Single Bay) (Naval Shipboard Use) Printed Wiring Assemblies Connectors, Coaxial, Radio Frequency; General Specification For Insulating Compound, Electrical (For Coating Printed Circuit Assemblies) STANDARDS MILITARY MIL-STD-105 MI L-STO- 109 MI L-STO-167-1 MI L-STO-188 Military Comnunication
9、s System Technical Standards MIL-STD-415 MIL-STD-461 MIL-STO-462 Sampling Procedures And Tables For Inspection By Attributes Quality Assurance Terms And Definitions Mechanical Vibrations Of Shipboard Equipment (Type I - Environmental And Type II - Internally Excited) Test Provisions For Electronic S
10、ystems And Associated Equipment, Design Criteria For Electromagnetic Emission And Susceptibility Requirements For The Control Of Electromagnetic Interference Electromagnetic Interference Characteristics, Measurement Of THIS DOCUMENT CONTAINS 6 PAGES . Provided by IHSNot for ResaleNo reproduction or
11、networking permitted without license from IHS-,-,-MIL-R-2bA 58 7779Ob OL5bOL7 1 = MIL-R-28886A( EC) MI L-STD-47 1 Maintainability Verification/Demonstration/Evaluation MIL-STD-781 Do-STU-1399, Interface Standard For Shipboard Systems, Electric Power, MI t -STD-1472 Reliability Design Qualification A
12、nd Production Acceptance Tests: Exponentia-1 Distribution Human Engineering Design Criteria For Military Systems, Equipment And Facilities Section 300 Alternating Current (Metric) (Copies of specifications and standards required by manufacturers in connection with specific acquisition functlons shou
13、ld be obtained from the contracting activity or as directed by the contracting officer. ) extent specified herein. the issue listed- in the current DoDESS and the supplement thereto, if applicable. 2.2 Other pubications. The following documents form a part of this specification to the The issues of
14、the documents which are indicated as Do0 adopted shall be ELECTRONLG TNDZISTRIES ASSOCIATION E EI4 RS-310-C-7T Racks, Panels And Associated Equipment (Application for copies should. be addresse to Electronic industries Assoctation, ZOG1 ye Street, NW, Washirrgtorr, OC 20006.) NATEONAL FERE PROTEGTTO
15、K ASSOCPAOK ( NFPk) 70-1qa4 National Electrical Code (Application for copies should be. addressed to Nationai Fire Protection Association, 470 Atlantic (Industry association specif icatiorrs and standards are generally available for reference from 2.3 Order of precedence. 3. REQLRREMENTS Avenue, Bos
16、ton, MA 0221-) libraries, and the references cited herein, the text of this specification shaF1 take precedence. They are also distributed amng technical groups and using Federal agencies. ). n the event of a conflict between he text of this specification 3.1 General. The- receiver shall be irr acca
17、rdance with MIL-E-16400 to the exten specified herein. 14.0 kilohertz (kHz) to 30.0 megahertz (MHr). sideband (SSB), upper sideband (UStX), lower sideband (LSB), and independent sideband (LSE), frequency modulation (FM), continuous wave (CW), ampritude modu.tatian (AM) and, with an external converte
18、r, frequency-shift keyed (FSK) mufti-channel radio teletype (see 6.4.2.2) - (see 4.3 and 6-31. 3.1.2.4. fhe receiver shall be a digitally tuned superheterodyne receiver with a frequency range of The receiver shitl provide reception of single 3.1.1 First articie, 3.1.2 Parts and mater s. Parts and ma
19、terials chaT be as specified in 5.1.2-1 through When specified, a sample shaEF be subjected to first article inspection 3.1.2.1 Unacceptable materisls. Receiver design: shall not incTude the materials specified in a through f: a. Polychlor issed ipherryk b. Asbestos air Pin A b. c. Safety ground sha
20、ll be green; Pin B 115 VAC high (supply) shall be black; Pin C 3.12.1.28 Power supply protection. Fault conditions ranging from open circuits to short circuits shall cause no damage to the power supply. 3.12.2 Human engineerin . The contractor shall comply with the human engineering operational and
21、maintenance design criterya of MIL-STO-1472 and the requirements specified herein except that the receiver shall be designed for use by the 5th percentile female to the 95th percentile male. that neither incorrect adjustment nor random sequencing of functions will cause damage to the receiver. 3.12.
22、2.1 Human error design protection. Front panel control functions shall be of such design 3.13 Detailed performance. 3.13.1 Sensitivity and gain. 3 13.1.1 Sensitivit . Detailed performance shall be as specified in 3.13.1 through 3.13.18. Sensitivity (see 6.4.7) and gain requirements shall be as speci
23、fied in 3.13.1.1 through 3.13.1.3. TABLE i1 and TAd any frequency within the complete frequency range of the receiver. Specified sensitivities shall be achieved in all modes with the manual RF gain control in the extreme clockwise (maximum gain) position and shall be measured from RF input to audio
24、output. Receiver sensitivity shall conform to the requirements specified in TABLE III. Sensitivity (14 kHz to 200 kHz). ? Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-L MIL-R-2bA 58 797770b OL5b023 7 MIL-R-28886A( EC) 3.13.1.2 Gain. The receiver g
25、ain shall be sufficient to produce standard audio output (see 6.4.3) for the input voltages of TABLE II and TABLE III, for any frequency within the complete frequency range (14 kHz to 30 MHz) of the receiver. exceed 10 dB for the complete working frequency range of each MHz frequency band. over the
26、complete receiver tuning range (14 kHz to 30 MHz) shall not exceed 6 dB total. 3.13.1.3 Gain variation. The variation in overall gaii; for any mode of reception shall not Ga:n variations 3.13.2 Selectivity. Selectivity (see 6.4.8) requirements shall be as specified in 3.13.2.1 through 3.13.2.4. 3.13
27、.2.1 Selectivity (antenna input to detector input) (see 6.4.8.1). The selectivity of the receiver, excluding the audio frequency (At) response characteristics, shall depend primarily upon the characteristics of the filter defining the final IF passband. When measured in accordance with 4.5.5.2, sele
28、ctivity shall be as specified in 3.13.2.1.1, 3.13.2.1.2, and 3.13.2.1.3. 3.13.2.1.1 USE, LSB, and ISE operation. USE, LSB, and ISB operation shall be as specified in a through h: a. b. C. to carrier -3000 Hz d. e. f. 9. h. USB passband (-3 dB): LSB passband (-3 dB): ISB passband (-3 d): Ripple (peak
29、 to valley): 3 dB maximum Attenuation at carrier frequency: Opposite sideband attenuation 1 kHz into opposite sideband: Attenuation at carrier +5300 Hz (USE): Attenuation at carrier -5300 Hz (LSB): Carrier +450 Hz to carrier +3000 Hz Carrier -450 Hz to carrier -3000 Hz Carrier +450 Hz to carrier +30
30、00 Hz, and carrier -450 Hz 10 dB minimum 60 dB minimum 60 dB minimum 60 dB minimum 3.13.2.1.2 AM operation. AM operation shall be as specified in a through c: a. Passband (-3 dB): Carrier -3000 Hz to carrier +3000 Hz b. Ripple (peak to valley): 3 dB maximum c. Attenuation at carrier +9.5 kHz, carrie
31、r -9.5 kHz: 60 dB minimum 3.13.2.1.3 Ci4 operation. The -3 dB CW passband shall be 300 Hz. The -60 dB passband shall not exceed 1.0 kHz. 3.13.2.2 Overall passband (antenna input to audio output) (see 6.4.8.2). When measured in accordance with 4.5.5.2.1, the overall carrier passband characteristics s
32、half be as specified in 3.13.2.2.1. 3.13.2.2.1 USE, LSB, and ISB characteristics. USE, LSB, and ISB receiver passband characteristics shall be as specified in a through d: a. USB passband (-3 dB): Carrier +450 Hz to carrier +3000 Hz b. LSB passband (-3 dB): Carrier -450 Hz to carrier -3000 Hz c. ISB
33、 passband (-3 dB): Carrier +450 Hz to carrier t3000 Hz, and carrier -450 Hz to carrier -3000 Hz d. Ripple (peak to valley): 1. Carrier +450 Hz to carrier +3000 Hz: 3 dB maximum USB 2. Carrier -450 Hz to carrier -3000 Hz: 3 dB maximum LSB 3.13.2.3 Reciprocal mixin . With the receiver in the SSB mode,
34、 3 kHz bandwidth, and an unmodulated resonant wanted sigial of -107 decibels referred to one milliwatt (dem), the output (S+N)/N ratio shall be greater than or equal to 10 dB with an unwanted signal at a ,Af greater than or equal to 100 kHz and a level of -17 dBm. signal of -77 ddthe receiver gain a
35、djusted so that the wanted signal is just below the AGC threshold, the output (S+N)/N ratio shall be greater than or equal ta 10 dB and the receiver output level shall not be reduced by more than 3 dB when an unwanted signal at a Af of greater than or equal to 100 kHz and a level of +12 dh is introd
36、uced. 3.13.2.4 Blockin . With the receiver in SSB mode, 3 kHz bandwidth, an unmodulated resonant 3.13.3 Spurious responses (see 6.4.9). The receiver shall conform to the requirements specified in 3.13.3.1 through 3.13.3.6. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted withou
37、t license from IHS-,-,-MIL-R-2888bA 58 9999906 0156024 7 3.13.4.1 Audio output voltage XTT load for a chanqe in output voltage regulation. Each audio amplifier shall be so designed that the remain constant within 30 percent (in V) of the value obtained with a 600-ohm the value of this load from 100
38、ohms to 600 ohms in 100-ohm steps. This condition shall be obtained with any input level from zero input to that which produces full output. power output transistors shall not be subjected to damage or deterioration at any output load impedance from zero ohms to an open circuit. The 3.13.4.2 Maximum
39、 undistorted output. With an RF input of not less than 1000 pV, the maximum undistorted output (see 6.4.11) shall be not less than 100 milliwatt (mw), dissipated in a 600-ohm resistive load at the line output receptacles of the audio amplifier; or with the line level control set at the maximum rated
40、 output setting, the undistorted output appearing across a 600-ohm resistive load connected to the telephone jack shall be not less than 30 mW. In the AM mode, with 30 percent mod, distortion shall be not greater than 5 percent. 3.13.4.3 Audio level controls. Separate (noncoaxial) level controls sha
41、ll be provided on the receiver front panel for audio line and local (telephone) outputs. Telephone level controls shall be equipped with knobs chosen in accordance with the part selection procedures specified in MIL-E-16400. Line level controls shall be provided on the front panel for audio line con
42、trols and shall be a screw- driver-adjustable type. Controls shall be standard audio (clockwise log) taper, and shall provide smooth variation in output. 3.13.3.1 Internal1 generated spurious outputs. With no RF input signal, the antenna input terminated with a shieldzd 50-ohm resistor, and the rece
43、iver adjusted for the reception of SSB signal, internally generated receiver outputs shall conform to the requirements specified in 3.13.3.1.1 and 3.13.3.1.2. 3.13.3.1.1 Receiver operated on an internal frequency standard. No more than seven spurious responses shall occur with output levels equivale
44、nt to that resulting from a 0.4 pV to 4.0 pV (open circuit) reference signal applied to the antenna input. the equipment signal applied to the antenna input. All other spurious responses generated within shall have output levels less than that resulting from a 0.4 pV (open circuit) reference 3.13.3.
45、1.2 Receiver operated on an externally supplied 1 MHz reference. When, in lieu of operating with the internal frequency standard, the receiver is supplied an external 1 MHz reference at an available Dower of +21 dBm (5 V ooen circuit in series with 50 ohms), havinq all nonharmonically related compon
46、ents at least 90 de; and all harmonically related components-at leait 60 dB below the reference, internally generated spurious outputs shall conform to the requirements of 3.13.3.1.1. 3.13.3.2 Image rejection. Image rejection (see 6.4.9.1), measured at the audio output, shall be not less than 80 dB.
47、 3.13.3.3 IF rejection (see 6.4.9.2). Rejection of all IFS, measured at the audio output, shall be not less than 80 dB. 3.13.3.4 Other single-signal spurious responses. At frequencies more than 20 kHz from the 3.13.3.5 Front-end intermodulation (out-of-band). CW signals at two frequencies, F1 and F2
48、, tuned frequency, the spurious signal rejection shall be at least 80 dB. shall be applied simultaneously to the antenna input from a 50-ohm linear combiner. shall be (Fl, F2) = (fo + Af, fo + 2 Af) and (fo - Af, fo - 2 Af), where fo is the resonant frequency of the sideband and Af is greater than O
49、. The signal pairs shall be increased in ampli- tude, maintaining equality of the two signals until the receiver output reaches 10 dB (S+N)/N or until each input signal amplitude reaches the specified levels for that pair. The specified levels for the first pair shall be -20 dBm for Af greater than or equal to 100 kHz and -5 dBm for Af greater than or equal to 0.5fo. than or equal to 100 kHz and -5 dBm for Af greater than or equal to 0.3f0. The level for the third pair shall be +20 dBm for Af greater th
