1、MIL-STD-LBB -145 TC 77777LL 0022755 3 - Fu 3+/7 MIL-STD-188-145 7 MAY 1987 SUPERSEDING 1 NOVEMBER 1976 MIL-STD-188-322 MILITARY STANDARD INTEROPERABILITY AND PERFORMANCE STANDARDS FOR DIGITAL LOS MICROWAVE RADIO EQUIPMENT AMSC N/A AREA TCTSISLHC DISTRIBUTION STATEMENT A. Approved for public release;
2、 distribution is unlimited. / THIS DOCUMENT CONTAINS The following other Government documents and publications form a part of this standard to the extent specified herein. DEPARTMENT OF DEFENSE DoDD 5000.43 Acquisition Streamlining NATIONAL SECURITY AGENCY NACSEM 5201 (C) TEMPEST Guidelines for Equi
3、pment/System Design (U) a NACSIM 5100 (C) Compromising Emanations Laboratory Test Requirements, Electro- magnetics (U) Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-188-
4、145 (Copies of specifications, standards, handbooks, drawings, and publications required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer,) 2.2 Other publications, The following documents form
5、a part of this standard to the extent specified herein. Unless otherwise specified the issues of the documents that are DoD adopted shall be those listed in the issue of the DoDISS specified in the solicitation. The issues of documents that have not been adopted shall be those in effect on the date
6、of the cited DoDISS. NORTH ATLANTIC TREATY ORGANIZATION (NATO) STANDARDIZATION AGREEMENTS (STANAGs) 1 STANAG 4206 series - The NATO Multi-Channel Tactical Digital Gateway (consists of STANAG 4206 through STANAG 4213) (Copies of STANAGs required by contractors in connection with specific acquisition
7、functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.3 Order of precedence. In the event of a conflict between the text of this standard and the references cited herein, the text of this standard shall take precedence. 4 Copyright Communications -
8、Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-STD-L -145 TC 77777LL 00227b4 4 W T MIL-STD- 188- 145 3. DEFINITIONS 3.1 Definitions. Definition of terms used in this document shall be as specified in t
9、he current edition of FED-STD-1037. 3.2 Abbreviations and acronyms. Abbreviations and acronyms used in this document are listed in appendix B. O i l 5/6 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without
10、 license from IHS-,-,-I l l I I l I I l I MIL-STD-LBB -1115 TC 9999911 0022765 b W MIL-STD-188- 145 4. GENERAL REQUIREMENTS 4.1 Introduction. A microwave link transfers information inelectrical form from one point to another by means of a microwave radio signal. The microwave transmitter accepts a d
11、igital data signal input and produces an analog radio frequency (rf) electromagnetic signal output. The microwave receiver accepts the analog rf electromagnetic signal from the transmitter via the propagation path and produces a digital data signal output. The purpose of the interoperability standar
12、ds is to standardize the digital data and analog rf electromagnetic signals. The object is to enable microwave links to operate integrally with other microwave links and links that utilize other transmission media within long-haul and tactical communications systems. The purpose of the performance s
13、tandards is to establish parameters that will ensure that the output digital data signals replicate the input digital data signals. Figure 1 illustrates a typical digital LOS microwave radio link. 4.2 Description of a digital LOS microwave radio set. A microwave radio link is made up of two microwav
14、e sets, one at each end of an LOS propagation path. If LOS propagation cannot be achieved between the two paths. Each digital microwave set (in the conventional duplex configuration) accepts and delivers a transmission bit stream (TBS) , a clock bit stream (CBS), and a service channel bit stream (SC
15、BS). The SCBS includes monitor, alarm, and control data bit streams. Figure 2 shows the composition of a digital LOS microwave radio terminal set. - - microwave sets, then the link will include a microwave repeater, or repeaters, to provide tandem LOS propagation 4.3 Frequency bands. The microwave r
16、adios shall operate in one or more of the Government frequency allocation bands shownin table I. Within the Government bands, the operating bands and frequencies shall be as specified by the Military Communications-Electronics Board (MCEB) . Although the term “microwave” is generally recognized as a
17、pplying to frequencies from 1 to 30 GHz, three bands that are actually outside of this range are included in this standard because of the inventory of LOS equipment in these bands for which no other standards exist. Tactical systems shall be capable of operation in the long-haul frequency bands to e
18、nable tactical systems to serve as backups to portions of long-haul systems. TABLE I. Government frequency allocation bands. Frequency Band 225- 400 MHz 410 - 420 MHz 902 - 928 MHz -_ 1.350 1.400 GHz 1.429 - 1.435 GHz 1.710 - 1.850 GHz 2.200 - 2.290 GHz 4.400 - 4.990 GHz 7.125 - 8.400 GHz 14.500 - 1
19、5.350 GHz 21.200 - 23.600 GHz 25.250 - 27.500 GHz Long-Haul Application X X X X X Tactical Application X X 7 . -. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-+ u. a O GI E c.l
20、 8 .,-I a 8 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-LB -145 TC a 777771L 00227b7 T a -* MIL-STD-188-145 w o IL K w c z a - a m a w - o v) - L O za li I- * m v) 9 C
21、opyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD- 188-145 $.4! Equipment reliability. The mean time between outages (MTBO) for long-haul radio sets shall not be less than 12
22、5,000 hours. For tactical systems not configured for hot standby with automatic switchover, the mean time between failures (MTBF) of radio sets shall not be less than 3,000 hours. 4.5 Electrical interface, As a minimum, the interfaces for serial data shall be in accordance with the provisions of MIL
23、-STD-188-114. The capability to accept additional interface standards is not precluded. 4.6 Transmit modulation randomization. The transmitted data shall be randomized in order to reduce spectral peaks in the transmit spectrum and to assure there are adequate data transitions to allow receiver clock
24、 recovery. 4.7 Logic or sigiial sense protection, Frequency translation techniques incorporated by microwave equipment shall not invert the logic or signal sense of data streams. 4.8 Dispersive propagation. As a DO, the microwave radio equipment should contain circuitry to reduce the effects of disp
25、ersive propagation. The specific operating conditions shall be as defined in the applicable system, subsystem, or equipment specification. For long-haul systems such circuitry can be incorporated as an embedded feature or as an optional add-on. 4.9 Bit error ratio (BER), Radio equipment in longhaul
26、applications shall provide a BER better than 10 -I2 on a back-to-back basis at the highest bit rate used, Tactical radio equipment shall provide a BER better than 10 -lo (DO 10 -I2) ona back-to-back basis at the highest bit rate used. The duration of the BER measurement for both types of equipment s
27、hall be that required for a 95-percent confidence factor or 72-hour minimum. The received signal level (RSL) shall be 40 dB above threshold. Threshold is defined as that RSL which produces a BER of 10 -3. 4.18 Bit=count integrity (BCI), Since the initial implementation of digital systems in the DCS
28、will use LORAN C signals as its timing source, the microwave equipment shall not reduce the mean time to loss of BCI (MTTLBCI) below that caused by LORAN C propagation outages. In tactical systems, the equipment shall be designed so that interruption of the digital path for 10 seconds or less shall
29、not result in loss of BCI. 4.11 Timing. The microwave radio set shall be capable of accepting an external clock that will synchronize and control the clock rates of digital signals at the external interfaces. The radio set shall be capable of operating without external dock when this clock is not pr
30、ovided. The clock signal shall conform to MIL-STD-188-115. 4.12 Absolute delay equalization, The microwave radio equipment shall include circuitry to equalize the fixed time delay difference between two diversity paths within 1 nanosecond (ns), for delay differences as long as loo0 ns. The time dela
31、y difference between primary and standby transmitting systems shall also be equalized within 1 ns, 4.13 Other general requirements, There are other general requirements that must be met by LOS microwave equipment. As these requirements are detailed in other documents, they will not be restated here.
32、 The following is n listing of these other requirements and the appropriate reference document. a. Communications security. MIL-STD-188-200. b. Compromising emanations. NACSEM 5201 and NACSIM 5100. c. Electromagnetic compatibility. MIL-STD-461. d. Electronic warfare and electronic counter-countermea
33、sures. MIL-STD-188-20. e. Environmental control. MIL-HDBK-411. f. Grounding, bonding and shielding. MIL-STD-188-124, g. NATO interfaces. STANAG 4206 series. h. Primary electric power. MIL-HDBK-411. 10 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for Resal
34、eNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-LAB -195 TC W 7777733 0022767 3 6 8 MIL-STD-188-145 _ 7.0 3.5 7.0 3.5 5. DETAILED REQUIREMENTS 16 28 56 5.1 Rf bandwidth. Table II lists bandwidths used to transmit various numbers of digroups (1.544-Mbps bit streams) and
35、their associated SCBSs and overhead bits. The bandwidths listed in this table are the maximum for use within the United States andits territories. Elsewhere, the maximum bandwidths shall be as authorized by the host-nation government. 14.0 10.0 14.0 20.0 TABLE II. Maximum bandwidths for microwave ra
36、dio. 225 - 400MHz 410 - 420MHz Digroup Capacity 5 2.5 Design Ohjective Maximum Bandwidth (MHz) 21.200 - 23.600GHz 25.250 - 27.500 GHz 2 50 so 3.5 1.8 I 4 3.5 1.8 12 I 10.5 I 7.0 I 5.2 Rf stability. The transmitter and receiver rf stability shall be as shown in table III. TABLE III. Radio frequency s
37、tability. 1 I I I Rf stability in I parts-per-million Band 902 - 928MHz 1.350 - 1.400GHz 1.429 - 1.435 GHz 30 1.710 - 1.850 GHz 30 14.500 - 15.350 GHz 50 11 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted wit
38、hout license from IHS-,-,-MIL-STD-188-145 5.3 Emission mask. The requirements stated herein apply within the United States and its territories. Equipment to be employed outside of this jurisdiction will meet the certification of the host nation. 5.3.1 Bands 225-400 MHz, 902.928 MHz, 1.35-1.40 GHz, a
39、nd 1,429-1.435 GHz. The mean power of any spurious emission supplied to the antenna transmission line, as compared with the mean power of the fundamental output, shall be in accordpnce with the following limitations: a. The spurious emission shall be at least 25 dB below the fundamental output on an
40、y frequency removed from the assigned frequency by more than 75 percent up to and including 150 percent of the authorized bandwidth. b. The spurious emission shall be at least 35 dB below the fundamental output on any frequency removed from the assigned frequency, by more than 150 percent up to and
41、including 300 percent of the authorized bandwid th. c. On any frequency removed from the assigned frequency by more than 300 percent of the authorized bandwidth, the spurious emission shall be at least 43 plus 10 loglo (mean power of the fundamental output in watts) dB below the fundamental output.
42、5.3.2 Bands 410-420 MHz, 1.71-1.85 GHz, 2,20-2.29 GHz, 4.40-4.99 GHz, 7,125-8.400 GHz, and 14,50-15.35 GHz. 8. The spurious emissions shall be attenuated below the fundamental output as specified in the following formula. This applies in any 4-kHz segment, the center frequency of which is removed fr
43、om the assigned frequency by more than 50 percent up to and including250 percent of the authorized bandwidth. In any case, the attenuation shall be no less than 50 dB. A = 35 i- 0.8 (% - 50) f 10 log BW where: A = attenuation (in dB) below the mean output power level % = percent of the authorized ba
44、ndwidth removed from the assigned frequency BW = authorized bandwidth in MHz Attenuation greater than 80 dB is not required. b. In any 4.kHz segment, the center frequency of which is removed from the assigned frequency by more than 250 percent of theauthorized bandwidth, the spurious emissions shall
45、 be attenuated below the fundamental output by at least 43 plus 10 loglo (mean power of the fundamental output in watts) dB. Attenuation greater than 80 dB is not required, 5.3.3 Bands 21.2-23,6 GHz and 25.25-27.50 GHZ. a. The spurious emissions shall be attenuated below the fundamental output as sp
46、ecified in the following formula. This applies in any 1-MHz segment, the center frequency of which is removed from the assigned frequency by more than 50 percent up to and including 250 percent of the authorized bandwidth. In any case, the attenuation shall be no less than 11 dB. 12 Copyright Commun
47、ications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-L -Li5 TC 9797911 O022773 L MIL-STD-188-145 f. 512 kbps (NATO interface). 5.6 Jitter. 5.6.1 Intrinsic jitter. Intrinsic jitter of the micro
48、wave radio equipment is not standardized. 5.6.2 Jitter transfer characteristic. The jitter transfer characteristic of the microwave radio equipment at 1.5U Mbps shall be within the limits defined by the mask of figure 3. Other bit rates are not standardized. I I A = 11 4- 0.4 (% - 50) + 10 log BW I.
49、 where: 5.6.3 Jitter and wander tolerance. At bit rates of 1.544 and 44.736 Mbps, the microwave radio equipment shall be capable of accepting jitter and wander up to the limits defined by the mask of figure 4. Other bit rates are not standardized. I 5.7 Intermodulation products. The companion transmitter intermodulation products shall not degrade receiver threshold
