1、MIL-T-85244 14 7779906 0364012 1 m MI L-T-85244(AS) 15 July 1985 MILITARY SPECIFICATION TRANSMITTING SET, TELEMETRIC DATA AN/DKT-49( XN-1) , AN/DKT-49( XN-2) , AND AN/DKT-49A This specification is approved for use by the Naval Air Systems Command, Department of the Navy, and is available for use by
2、al Departments and Agencies of the Department of Defense. t 1. SCOPE 1.1 Scope. This specification establishes the requirements for the manufacture and acceptance of the TeTemetric Data Transmitting Set AN/DKT-49 (XN-l), fied (see 6.2.lb): AN/DKT-49(XN-2), and AN/DKT-49A, herein referred to as the “
3、assembly.“ 1.2 Classification. Assemblies consist of the following types, as speci- Type I: AN/DKT-49(XN-l) manufactured in accordance with Drawi ng 917AS6400 and AN/DKT-49(XN-2) manufactured i n accordance with Drawi ng 91TAS8200. Type II: AN/DKT-49A manufactured i n accordance with Drawi ng 917AS8
4、845, 2, APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. Unless otherwise specified, the following specifications and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the
5、 solicitation form a part f this specification to the extent specified herei n. Be nef i ci a 1 comme nt s ( re comme nda t i o ns , add i t i ons , de 1 et i ons ) a nd a ny pert i ne nt data which may be of use in improving this document should be addressed to: Commandi ng Officer, Naval Air Engi
6、neeri ng Center, Systems Engineering and Standardization Department (SESD), Code 93, Lakehurst, NJ 08733, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 1420 “DISTRIBUTION STATEMENT A. Approved for publ
7、ic release; distribution is unlimited.“ f- THIS DOCUMENT CONTAINS -34- PAGES - - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-85244( AS) SPEC I FICATIONS FFRERAL PPP-B-601 MILITARY 341 L-P-116 Preservati on, Methods of STAN DARDS Marking f
8、or Shipment and Storage MI L-STO-454 Standard General Requi rementc for Electroni c qui pme nt MX L-STO-45662 Cal brati on Systems Requi remsnts 2*X -2 Other Government dqcbiments,- drawi rigs_,-. and: pub1 i cati Ons. ing GovernmGnt drawings-and publications form a part of this Specification ts the
9、 extent specified herein. The f o1 1 ow- DRAWINGS NAVAL AIR SYSTEMS COMMAND (Code Ident 30003) 91 7AS64OO 91 IAS6626 Signature Characteristics . 917AS8200 . Transmitti ng Set, Telemetric Pata Transmi tti ng Set, Telemetric Data AN/DKT-49( XN- 1) I- AN/DKT-49 XN-2) 9 1 7AS8845 Transmitting Sat, Telem
10、etric Data AN/ RKT-49A 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-85294 14 H 9999906 036401i4 5 PUBLICATIONS NAVAL AIR SYSTEMS COMMAND (Code Ident 30003) WS-6536 Procedures and Requi rements for Preparation for Soldering of Electrical Co
11、nnections (Copies of specifications, standards, drawings, and publications required by manufacturers in connection with specified acquisition functions should be obtained from the contracting activity or as directed by the contracting off i Cer, ) 2.1.3 Order of precedence. In the event of a conflic
12、t between the text of this specification and the references cited herein, the text of this specification shall take precedence. 3. REQUIREMENTS 3.1 Assembly description. The assembly shall consist of two individual electronics packages each frequency modul ati ng a separate transmitter, but with a c
13、ommon power supply (either three-phase alternating current (ac) or battery). (W) per transmitter into an approximately omnidirectional antenna. code modulation (PCM) system shall be a time division multiplex digital system with a frame length of 384 eight-bit words at a bit rate of 768 - +8 kilobits
14、 per second (kb/s) in a nonreturn to zero level (NRZ-L) format. being applied to the transmitter, the PCM signal shall be filtered through a low pass Bessel filter in order to minimize RF bandwidth. The seeker wide- band i ntermediate frequency (IF) shall be down converted to baseband by the wide-ba
15、nd video converter unit (WVCU) and this baseband signal shall modulate the second transmitter under normal post launch conditions. Prior to launch, a switch withi n the WVCU shall select injected video and i nput that signal (i nstead of converted IF) into the second transmitter. When specified in t
16、he contract or purchase order (see 6.2.lc), the assembly shall include a transponder with pulse-spaced codi ng for ground tracking. Radio frequency (RF) output power shall be not less than two watts The pulse Prior to 3.2 Characteristics. 3.2.1 Electrical performance. E fied herein. The following ca
17、utions ectrical performance shall be as speci- shall apply: a. The assembly contains a squ b-activated battery which may be acti- vated if excessive current is applied to the squib contacts WllP35-37 and WllP35-19. Activation of the battery shall require replacement of the battery since it is a one-
18、shot device. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-T-852LIq ILI 7777706 0364035 7 Q MIL-T-85244(AS) b. Care shall be exercised not to expose test or assembly personnel to excessive radiation levels. Radiation Tevels 2.5 meters from t
19、he antenna are not greater than 10 microwatts per centimeter squared (uW/cmz 1 . c. ON time shall be not greater than 30 minutes. time for every one minute ON time at room ambient temperature (15.6 degrees Celsius (OC) to 21.1 C) shall be allowed before reapplica- tion of power, A two minute OFF d.
20、The power of 4.6.8.4 shall be applied for not greater than 30 seconds (s) with not less than one minute between applications. a 3.2.1.1 Power logic. 3.2.1.1.1 Seeker power. Contacts WllP34-9, WllP34-28, and WllP34-29 - shall draw 90.5 20.2 amperes direct current (Adc), 250 - +50 mi 1 li amperes di r
21、ect current (mAdc), and 75 - t30 mAdc, respectively. 3.2.1.1,2 Aircraft power. Contacts WllP34-6, WllP34-7, and WllP34-25 shall draw 350 +lo0 milliamperes root mean square (mArms), 1.3 t0.2 amperes root mean square (Arms), and 350 +lo0 mArms, respectively. time of not qreater than 120 s the current
22、at contact WliP34-7 shall be 350 Followi ng warm-up - - +1QO mArms. 3.2.1.1.3 Battery simulation. Contact WllP35-25 shall draw 3.50 - +0,70 Adc. 3.2.1.1.4 +26.5 volt direct current (Vdc) test. 3.2.1.,5 Squib resistance. The squib resistance between cantacts WlIP35- Contacts R2-2 and R3-2 together sh
23、all draw 6.5 - +O.T Actc. 19 and WlfP35-37 shall be 3.0 - +2.0 ohms. 3.23 2 Transmitters 3.2.1.2.1 RF ouput power. RF output power shall be not less than two W per transmitter i nto an approximately omnidirectional aneenna. 3.2.1.22 PCM transmitter center frequency. The PCM transmitter center freque
24、ncy far each type- shall be as specified in Table I. ation shall 3,2,1.2.3* PCM transmitter deviation. The PCM transmitter dev be 550 - +150 kilohertz (kffz) peak-to-peak (p-p). 3.2.i.2.4 WVCU transmitter center frequency. The WVCU transm frequency shall be as specified in Table I. tter center 4 Pro
25、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-852Y4 39 7799706 0364036 7 - TABLE I. Transmi tter frequencies. Assembly part number Drawing number 9 17AS6400 9 17AS8200 9 17AS8200 91 7AS8845 917AS6400 917AS8200 9 17AS8200 917AS8845 917AS6400 91
26、7AS8200 9 17AS8200 917AS8845 917AS6400 917AS8200 917AS8200 917AS8845 Dash number -1 -1 -5 -1 -2 -2 -6 -2 -3 -3 -7 -3 -4 -4 -8 -4 Transmi ter center frequency r (MHzl - +0.003 percent) blvcu 2204.5 2204.5 2204.5 2204.5 2216.5 2216.5 2216.5 2216.5 2231.5 2231.5 2231.5 2231.5 2240.5 2240.5 2240.5 2240.
27、5 PCM 2258.5 2258.5 2258.5 2267.5 2267.5 2267.5 2267.5 2276 5 2276.5 2276.5 2276.5 2285.5 2285.5 2285.5 2285.5 2258.5 i/ Megahertz (MHz) - 3.2.1.2.5 WVCU transmitter deviation. The WVCU transmitter deviation shall be 550 - +150 kHz p-p. 3,2,1.3 PCM output. 3.2.1.3.1 PCM bit rate. The PCM bit rate sh
28、all be 768 28 kb/s. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-85244 14 9999906 0364037 O m- 3.2.1.3.2 PCM synchronization words. The PCM output shall consist of 384 ei ght-bi t words. and shall form the following pattern of 24 bits: Thr
29、ee ei ght-bi t words shall be PCM synchroni zat i on words Fi rst Last 111110101111001100100000 3.2.1.3.3 PCM frame format. The PCM frame output shall have the format specified in Table II, with PCM word one being that word immediately following the PCM synchronization words. The contents of the wor
30、ds as specified in Table II shall have the corresponding PCM output as specified in Table III. 3.2.1.3.4 Crosstalk PCM word pairs. Crosstalk for the following 11 PCM word pairs shall be not greater than six least significant bits: A4 and A5, A4 and A14, A4 and A25, A4 and A34, A42 and A43, Al and A2
31、, A13 and Al, A44 and A45, A40 and A41, and A43 and A13. A4 and A42, 3.2.1.4 WVCU output. 3.2.1.4.1 WVCU automatic gain control (AGC) monitor. PCM word 360 shall The count shall be not greater than 125 have a count of 255 for a signal level of -100 decibels referenced to one milliwatt (dBm) into a 5
32、0 ohm load. for a signal level of zero dBm. The plot shall be monotonic and produce a 1 i near Cali brati on curve. 3.2.1.4,2 Post launch. During post launch, the WVCU output signal level at 70 - +5 kHz shall be 20 25 decibels (dB) below the signal level at 50 - +5 kHz. 3.2.1.4.3 Prel.aunch. During
33、prelaunch, the WVCU output signal level at 15 - +2 kHz shall be 6.6 - i5.0 dB above the signal level at 50 - t5 kHz. 3.24.4 Gated osci 11atot.s. 3.2.1.4.4.1 No oscillators. At the WVCU output, the signal level at all frequencies between 3.0 kHz and 12.0 kHz inclusive shall be not less than 50 d6 bel
34、ow the sSgna1 level at 50 d t5 kHz. 3.2.1.4.4.2 3.0 kHz. At the WVCU output, the signal level at 3.0 - t0.5 kHz shall be 15 25 dB below the signal level at 50 - +5 kHz. 3.2.1.4.4.3 6.g kHz, At the WVCU output, the signal level at 6.0 - t0.5 kHz shall be 11.5 - +5.0 d6 below the signal level at 50 -
35、+5 kHz. 3,2.1.4,4,4 1-2.0 kHt, At the WVCU output, the sjgnal level at 12.0 - +1,0 kHz shall be i525 d below the signal level at 52) I $5 ktiz, 3.2.1.5 - Bit. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I - Word number 1 2 3 4 5 6 7 8 9 10 11 -
36、 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 MIL-T-85244 14 777770b 0364018 2 E -. MI L-T*85244( AS) TABLE II, PCM -fJarne words-. Conte nt c c1 Al A2 A3 A4 A5 A6 A7 A8 Al A2 A3 A4 A9 Al O D2 Al 3 Al A2 A3 A4 Al 4 Al 5 Al 6 Al 7 Al A2 A3 A4 Al 8 A19 A2 O D1 Al
37、 A2 A3 A4 A2 5 A26 Word number 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 Conte nt s 7 A27 C2 Al A2 A3 A4 c3 c4 c5 C6 Al A2 A3 A4 A5 A6 A7 A8 Al A2 A3 A4 A9 Al o D2 A30 Al A2 A3 A4 c7 C8 C9 c10 Ai A2 A3 A4 C1 1 Word number 79
38、80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 1 o9 110 111 112 113 i 14 115 116 117 Conte nt s c12 C13 C14 Al A2 A3 A4 C15 C16 c17 C18 Al A2 A3 A4 Cl 9 cz o c2 1 c22 Al A2 A3 A4 A5 A6 A7 A8 A1 A2 A3 A4 A9 Al 0 D2 Al. 3 Al A2 A3 A4 Provided by IHSNot
39、for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-T-B5244 3V 9999906 0364039 V M MI L-T-85244( AS) TABLE II., PCM frame words. - Conti nued. Word numbe r 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 1
40、46 147 148 149 150 151 152 153 154 655 156 157 Contents Al 4 Al 5 Al 6 Al 7 Al A2 A3 A4 Al 8 Al 9 A20 D1 Al A2 A3 A4 C23 c2 4 C25 C26 Al A2 A3 A4 c27 C2 8 c29 C30 Al A2 A3 A4 A5 A6 A? A8 A1 A2 A3 A4 Word number 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 1
41、80 181 182 183 184 185 186 187 188 189 190 191 192 193 194 135 196 197 8 Conte nt s A9 Al O D2 A3 1 Al A2 A3 A4 C3 1 C32 c33 c34 Al A2 A3 A4 c35 36 c37 C38 Al A2 A3 A4 c39 C40 C4 1 C42 Al A2 A3 A4 c43 c44 c4 5 c45 A3 A2 A3 A4 Word number 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 21
42、3 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 23 1 232 233 234 235 236 237 Conte nt s A5 A6 A7 A8 Al A2 A3 A4 A9 A10 02 Al 3 Al A2 A3 A4 Al 4 Al 5 Al 6 Al 7 Al A2 A3 A4 A18 . Al 9 A20 D1 Al A2 A3 A4 A2 5 A26 A2 7 A32 Al A2 A3 A4 . Provided by IHSNot for ResaleNo reproduction
43、or networking permitted without license from IHS-,-,-MIL-T-52114 1Y = 797770b 03611020 O MIL-T-85244( AS) TABLE II. PCM frame words. - Continued. Word number 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 26 3 264 265 266 267 268 269 270 271 272 2
44、73 274 275 276 277 , Co nt e nt s c4 7 C48 c49 C50 Al A2 A3 A4 A5 A6 A7 A8 Al A2 A3 A4 A9 Al O D2 A3 3 Al A2 A3 A4 C5 1 C52 c53 c54 Al A2 A3 A4 c55 C56 c57 C58 Al A2 A3 A4 Word number 278 279 280 281 282 283 284 285 286 287 288 289 290 29 1 29 2 29 3 294 29 5 296 29 7 298 29 9 300 301 302 303 304 30
45、5 306 307 308 309 310 311 312 313 314 315 316 31 7 9 Conte nt s c59 C60 C61- C6 2 Al A2 A3 A4 A34 A3 5 A36 A3 7 Al A2 A3 A4 A5 A6 A7 A8 Al A2 A3 A4 A9 A10 D2 Al 3 Al A2 A3 A4 A14 Al 5 Al 6 Al 7 Al A2 A3 A4 Word number 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 33
46、8 339 340 34 1 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 Contents Al 8 Al 9 A20 D1 . Al A2 A3 A4 A38 A39 A4 O A4 1 Al A2 A3 A4 A4 2 A4 3 A44 A45 Al A2 A3 A4 A5 A6 A7 A8 Al A2 A3 A4 A9 Al O D2 A46 Al A2 A3 A4 Provided by IHSNot for ResaleNo reproduction or networking permitted w
47、ithout license from IHS-,-,-WoFd number 358 359 360 36 1 36 2 36 3 364 365 366 MIL-T-852LIY 34 W 7777906 0364023 2 W MI L-T-85244( AS) TABLE II. PCM frame words. - Continued. Conte nt s A4 7 A4 8 A49 A50 Al A2 A3 A4 Al 1 Word number Contents 367 368 369 370 37 1 372 37 3 374 375 Al 2 A2 1 A2 2 Al A2
48、 A3 A4 A2 3 A24 c 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-5244 14 H 7777706 0364022 4 = :on tents Al A2 A3 A4 A5 A6 A7 A8 A9 A10 Al 1 A12 TABLE III. Input and output requirements. Input level High Low High Low High Low High Low High
49、Low High Low High Low High Low High Low High Low High Low High Low Contact WllP35-10 WllP35-11 WllP34-19 W11P34-35 W11 P35-28 WllP35-30 W11P35-3 WllP35-22 WllP35-1 - 11 NA NA Input vol tage +1.49 Vdc 0.0 Vdc +1.49 Vdc 0.0 Vdc +5.00 Vdc 0.0 Vdc +0.29 Vdc 0.0 Vdc +3.67 Vdc 0.0 Vdc +3.38 Vdc 0.0 Vdc +3.61 Vdc 0.0 Vdc +7.5 Vdc 0.0 Vdc +3.
