1、UIL-N-85005A 58 9797906 OL732Lb 4 W . COMIENTS (x RECWENDATIONS WHICH WY BE OF USE IN IMPROVING THIS DOCUMENT MY 6E SENT TO THE PREPARING ACTIVIY WHEN A SELF-ADDRESSED STANDARDIZATIW DOCUMEM IWROVEMENT PROPOSAL (OD FORM 1426) APPEARS AT THE END OF THIS DOCUMENT, OR BY LETTER ADDRESSED TO THE COGNIZA
2、NT ACTIVITY. . .-. J T _. -? Xk-X-8SOUj.A (AS ) 31 May 1978 SVPERSEDIX 24 3CTOBER 1973 nIL-S-E50)5 (As) MILITARY SPECIFICATION NAVIGATION DISPLAY SET, Aq!ASN-12?, This specification has hen approvsd by the Xaval Air System5 Coazund, Department of the Xavy 1.0 SCOPE 1.1 Scope - The equipment covered
3、by this specification shall utilize sensor inputs described herein and provide simultaneous inertial and dead reckoning navigation.coluticns in both a Geographical and a Tacticnl mode. The set shali also provide for the processing and display of a stabilized plot of selected narkers. FSC 5826 THIS D
4、OCUMENT CONTAINS PAGES. II.-.- . . . ., Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-N-SOO5A 58 7777906 0373237 b - NIL-N-8 5005 (AS) * 1.2 Classification - The equipment covered by this specification shall consist of the following items: 1.3
5、requirements of this specification with the associated equipment listed in Paragraph 6.8. Associated Equipment - The equipment shall operate to the . . -2- . k;.y I: Ci . . I b r;. c: E . 3.5.2.3 Weight - The weight of the Keyer Control shall not exceed 8.5 pounds. 3.5.2.4 Contents - The Keyer Contr
6、ol shall contain logtc circuitry functions interfacing both the NC and the Digital Display Indicator. 3.5.2.4.1 be, or similar to, differential line receivers type uA9615 and line drivers type pA9614. Full compatibility shall exfst. Circuft input impedance shall be a nominal 130-ohm dc balanced line
7、 load w*th full driver capability at this level. Logic level definition shall be as presented in Figure 4. Logic Signal Circuitry - Logic signal cfrcuitry shall 3.5.2.4.2 Interface with NC - Refer to data function of Sect2on 3.5.2.1. All communications shall be via a “pr$ority interrupt command word
8、 method. A command word of 16 bits shall precede all incornhg and outgoing data, and shall contain the fnstructions specffying what data are incoming to the Keyer Control or outgoing to the NC in subsequent series of clock words. 3.5.2.4.2.1 Command Word - The equipment shall be such-that seyeral i
9、nstructions specified in one command Mord shall be processed hy te Keyer Control in a specfffc prforfty sequence. (4 reset pulse shall always precede a command word and shall terminate any grocessing Ln progress, enabling the followfng new command word. - 25 - Provided by IHSNot for ResaleNo reprodu
10、ction or networking permitted without license from IHS-,-,-MIL-N-85005A 58 7373906 OL732LiL 3 DIFFERENTIAL SIGNAL 10 MARKER ENTRY 01 O to 0.4VDC BI FIGURE 3. Marker Entry Controller. REFERENCED To LGIC WOUND FIGURE 4. Logic level definition. - 26 - Provided by IHSNot for ResaleNo reproduction or net
11、working permitted without license from IHS-,-,-MIL-N-85005A 58 7777706 0173242 5 U BIT O 1 2 3 4 MIL-N-85005A(M ) No. Reference II Words Paragraph Table Function INTERRUPT OUTGOING 1 3.5.2.4.3.3 KEYER CONTROL OUTGOING 1 3.5.2.4.3.4 SPARE SPARE SPARE 3.5.2.4.2.2 Access Signals - Panel switch position
12、s shall be interrogated at a cyclic rate. formed by actuating momentary action push-button indicators (PBI) (Para- graph 3.5.2.5.3), shall be handled on an interrupt basis. The interrupt request to the NC shall be on a dedicated line, and shall simultaneously formulate an interrupt word in storage i
13、n the Keyer Control. the NC is ready to accept this interrupt word, a reset pulse is trans- mitted followed by a command word requesting the Keyer Control to output the stored interrupt word. Immediate access signals to the NC When 6 ISPARE 3.5.2.4.2.3 Serial Data Format - Serial data format between
14、 the Keyer Control and NC shall be as presented in Figure 5. I 3.5.2.4.2.4 Signal Inputs - Command reset input shall be a differential logical “1“ pulse of 250 2 50 ns duration. . BIT status lights input shall be separate dedicated lines: 8 SPARE 9 DIGITAL DISPLAY I INCOMING 3 3.5.2.4.2.6 1 10 DIGIT
15、AL DISPLAY II INCOMING 2 3.5.2.4.2.7 1 . 11 DIGITAL DISPLAY III INCOMING 2 . 3,5.2.4.2.8 2 12 DIGITAL DISPLAY IV INCOMING 2 3.5.2.4.2.9 2 13 EYER CONTROL DISPLAY INCOMING 2 3.5.2.4.2.10 1 and 2 Logical !i“ = Light illuminated. Logical “O“ = Light extinguished. 14 I SPARE I I 15 I KC LT INCOMING 11 I
16、 3.5.2.4.2.11 i (1) MALF (2) CMPTR An input to light “CMPTR“ shall also activate ill . 3.5.2.4.2.5 Command Word Serial Input - Command Word serial input from NC to the Keyer Control shall be of serial format; character- istics of Paragraph 3.5.2.4.1, waveform as shown in Figure 5, and struc- ture as
17、 tabulated. MSB COMMAND WORD LSB i5 14 13 12 11 10 9 8 7 6 5 4 3 2 101 I I I I 5 I SPARE I I I - 27 - .- . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-N-85005A 58 = 7799906 0373243 7 o Q y Cu I (u T o O a i Y- O m m cn a - 28 - t Provided by
18、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILN-85005A(M ) 3.5.2.4.2.6 lnput fran NC to Keyef Control shell be as tabulated. as listed in Table I. DQiW Display I Serial Input - Digital Diaplay I Serial Alpha code shall apply Lover Degree 11 1 L bwer Degree
19、2 Lower Decimal 1 Lower Deciml 2 Display Positions of Alpha & Numerics Digital Display I (3 worde) MSB ISB 115 14 13 12 11 10 9 817 6 5 4 3 2 101 Typ each word, Word 1 sent out first, Bit O sent out first - 29 - .I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIGN-85 005A (AS ) TMLE I. Alphanumeric bit code (ASCII). .- MIL-N-85005A 58 m 7977706 01732q5 O m - 30 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
