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IRIG 106-99 CHAPTER 9 - TELEMETRY ATTRIBUTES TRANSFER STANDARD, Continued.... Start of Chapter 9 9.5.2 General Information (G) 9.5.3 Transmission Attributes (T) 9.5.4 Tape Source Attributes (R) 9.5.5 Multiplex/Modulation Attributes (M) 9.5.6.1 PCM Format Attributes (P) 9.5.6.2 PCM Measurement Description (D) 9.5.7 PAM Attributes (A) 9.5.8 Data Conversion Attributes (C) 9.5.9 Airborne Hardware Attributes (H) TELEMETRY ATTRIBUTES TRANSFER STANDARD, Continued.... 9.5.6.3 1553 Bus Data Attributes (B) 9.5.6.3 1553 Bus Data Attributes (B). Figure 9-8 and table 9-7 describes the 1553 bus-originated data formats. The 1553 Bus Data Attributes Group defines the attributes of a data acquisition system that is compliant with chapter 8. The primary components of this group are the recording description and message content definition. The former defines the method by which the data were recorded on the tape such as track spread versus composite. The latter consists of the message identification information and the measurement description set. The message identification information defines the contents of the control word that identifies each 1553 message. The measurement description set describes the measurement attributes and contains the measurement name which links the measurand to the Data Conversion Attributes Group (C). Mode codes are described in the message identification information. If the Subterminal Address (STA) field contains 00000 or 11111, the information in the Data Word Count/Mode Code field is a mode code and identifies the function of the mode code. If the mode code has associated data words, they are described in this section of the attributes. If the 1553 message is a remote terminal to remote terminal transfer, both the transmit command and the receive command are used to identify the message.  |
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TABLE 9-7. 1553 BUS DATA ATTRIBUTES GROUP (B) |
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R |
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MAX |
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1 |
DATA LINK NAME |
32 |
B-x\DLN |
IDENTIFY THE DATA LINK CONSISTENT WITH THE MULTIPLEX/MODULATION GROUP. THE PCM FORMAT OF THE DATA STREAM SHALL BE DEFINED IN THE PCM FORMAT ATTRIBUTES GROUP. |
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2 |
TEST ITEM |
16 |
B-x\TA |
TEST ITEM DESCRIPTION IN TERMS OF NAME, MODEL, PLATFORM, OR IDENTIFICATION CODE THAT CONTAINS THE DATA ACQUISITION SYSTEM. |
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3 |
NUMBER OF BUSES |
1 |
B-x\NBS\N |
SPECIFY THE NUMBER OF BUSES INCLUDED WITHIN THIS DATA LINK. |
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4 |
BUS NUMBER |
3 |
B-x\BID-i |
ENTER THE BUS NUMBER AS A BINARY STRING. |
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5 |
BUS NAME |
32 |
B-x\BNA-i |
SPECIFY THE BUS NAME. |
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RECORDING DESCRIPTION |
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6 |
NUMBER OF TRACKS |
2 |
B-x\TK\N-i |
ENTER THE NUMBER OF TAPE TRACKS USED TO RECORD DATA. ANY ENTRY GREATER THAN ONE INDICATES THAT THE DATA HAS BEEN SPREAD ACROSS MULTIPLE TRACKS. |
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7 |
TRACK SEQUENCE |
3 |
B-x\TS-i-k |
IN THE FOLLOWING ENTRIES GIVE THE SEQUENCE ORDER OF TAPE TRACKS THAT SHOULD BE USED TO RECOVER THE DATA STREAM IN THE CORRECT ORDER. (THE ORDER GIVEN SHOULD CORRESPOND TO THE ACTUAL SKEW OF THE DATA ON THE TAPE.) |
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MESSAGE CONTENT DEFINITION |
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8 |
NUMBER OF MESSAGES |
8 |
B-x\NMS\N-i |
THE NUMBER OF MESSAGES TO BE DEFINED. |
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9 |
MESSAGE NUMBER |
8 |
B-x\MID-i-n |
THE MESSAGE NUMBER WHICH CONTAINS THE FOLLOWING DATA. |
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10 |
MESSAGE NAME |
32 |
B-x\MNA-i-n |
SPECIFY THE MESSAGE NAME. |
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11 |
REMOTE TERMINAL NAME |
32 |
B-x\TRN-i-n |
ENTER THE NAME OF THE REMOTE TERMINAL THAT IS SENDING OR RECEIVING THIS MESSAGE. FOR RT/RT, SPECIFY THE SENDING REMOTE TERMINAL NAME. |
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12 |
REMOTE TERMINAL ADDRESS |
5 |
B-x\TRA-i-n |
SPECIFY THE FIVE BIT REMOTE TERMINAL ADDRESS FOR THIS MESSAGE. |
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13 |
SUBTERMINAL NAME |
32 |
B-x\STN-i-n |
ENTER THE NAME OF THE SUBTERMINAL THAT IS SENDING OR RECEIVING THIS MESSAGE. |
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14 |
SUBTERMINAL ADDRESS |
5 |
B-x\STA-i-n |
SPECIFY THE FIVE BIT SUBTERMINAL ADDRESS FOR THIS MESSAGE. |
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15 |
TRANSMIT/ |
1 |
B-x\TRM-i-n |
INDICATE IF THIS COMMAND WORD IS A TRANSMIT OR RECEIVE COMMAND: TRANSMIT - 1 |
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16 |
DATA WORD COUNT/MODE CODE |
5 |
B-x\DWC-i-n |
ENTER THE NUMBER OF DATA WORDS AS A BINARY STRING, USING ‘X’ TO INDICATE A "DON'T CARE" VALUE. IF THE SUBTERMINAL ADDRESS INDICATES A MODE CODE ENTER THE MODE CODE VALUE AS A BINARY STRING. |
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17 |
SPECIAL PROCESSING |
200 |
B-x\SPR-i-n |
PROVIDE ANY SPECIAL PROCESSING REQUIREMENTS PERTAINING TO THIS MESSAGE. |
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RT/RT RECEIVE COMMAND LIST |
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18 |
REMOTE TERMINAL NAME |
32 |
B-x\ |
ENTER THE NAME OF THE REMOTE TERMINAL THAT IS RECEIVING THIS RT/RT MESSAGE. |
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19 |
REMOTE TERMINAL ADDRESS |
5 |
B-x\ |
SPECIFY THE FIVE BIT REMOTE TERMINAL ADDRESS FOR THIS RT/RT MESSAGE. |
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20 |
SUBTERMINAL NAME |
32 |
B-x\ |
ENTER THE NAME OF THE SUBTERMINAL THAT IS RECEIVING THIS RT/RT MESSAGE. |
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21 |
SUBTERMINAL ADDRESS |
5 |
B-x\ |
SPECIFY THE FIVE BIT SUBTERMINAL ADDRESS FOR THIS RT/RT MESSAGE. |
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22 |
DATA WORD COUNT |
5 |
B-x\ |
ENTER THE NUMBER OF DATA WORDS AS A BINARY STRING, USING ‘X’ TO INDICATE A "DON'T CARE" VALUE. EXCLUDE STATUS AND TIME WORDS. (AN RT/RT MESSAGE CANNOT CONTAIN A MODE CODE). |
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MODE CODE |
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23 |
MODE CODE DESCRIPTION |
200 |
B-x\MCD-i-n |
DESCRIBE THE FUNCTION OR ACTION ASSOCIATED WITH THIS MODE CODE. |
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24 |
MODE CODE DATA WORD DESCRIPTION |
200 |
B-x\MCW-i-n |
IF THE MODE CODE HAS AN ASSOCIATED DATA WORD FOLLOWING THE MODE CODE COMMAND, PROVIDE A COMPLETE DESCRIPTION OF THE DATA WORD. |
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MEASUREMENT DESCRIPTION SET |
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25 |
NUMBER OF MEASURANDS |
4 |
B-x\MN\N-i-n |
SPECIFY THE NUMBER OF MEASURANDS. |
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26 |
MEASUREMENT NAME |
32 |
B-x\MN-i-n-p |
MEASURAND NAME. |
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27 |
PARITY |
2 |
B-x\MN1-i-n-p |
NORMAL WORD PARITY. EVEN – ‘EV’ |
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28 |
PARITY TRANSFER ORDER |
1 |
B-x\MN2-i-n-p |
PARITY BIT LOCATION LEADS WORD – ‘L’ |
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MEASUREMENT LOCATION |
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29 |
NUMBER OF MEASUREMENT LOCATIONS |
2 |
B-x\ |
IF THIS MEASUREMENT IS CONTAINED IN ONE WORD, ENTER ‘1’. IF THIS MEASUREMENT IS FRAGMENTED, ENTER THE NUMBER OF FRAGMENTS. |
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30 |
MESSAGE WORD NUMBER |
3 |
B-x\ |
ENTER THE NUMBER CORRESPONDING TO THE DATA WORD COUNT WITHIN A MESSAGE WHICH CONTAINS THE MEASUREMENT OR THE FRAGMENTED MEASURAND. |
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31 |
BIT MASK |
64 |
B-x\ |
BINARY STRING OF 1s AND 0s TO IDENTIFY THE BIT LOCATIONS WHICH ARE ASSIGNED TO THIS MEASUREMENT IN THE WORD IDENTIFIED ABOVE. IF THE FULL WORD IS USED FOR THIS MEASUREMENT ENTER ‘FW’. LEFTMOST BIT CORRESPONDS TO FIRST BIT TRANSMITTED. |
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32 |
TRANSFER ORDER |
3 |
B-x\ |
SPECIFY IF THE START BIT IS MOST SIGNIFICANT – ‘MSB’ |
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33 |
FRAGMENT POSITION |
1 |
B-x\ |
A NUMBER FROM 1 TO N WHICH SPECIFIES THE POSITION OF THE FRAGMENT WITHIN THE RECONSTRUCTED BINARY DATA WORD, (1 CORRESPONDS TO THE MOST SIGNIFICANT FRAGMENT). |
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REPEAT THE ABOVE TO DESCRIBE EACH FRAGMENT OF A FRAGMENTED WORD. THE TRANSFER ORDER INDICATES WHETHER TO TRANSPOSE THE ORDER OF THE BIT SEQUENCE OR NOT (LSB INDICATES TO TRANSPOSE THE BIT SEQUENCE). |
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COMMENTS |
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34 |
COMMENTS |
3200 |
B-x\COM |
PROVIDE ANY ADDITIONAL INFORMATION REQUIRED OR DESIRED. |
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