IRIG 106-99 Chapter 9, PCM Format Attributes

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)
9.5.6.2 PCM Measurement Description (D)
9.5.6.3 1553 Bus Data Attributes (B)
9.5.7 PAM Attributes (A)
9.5.8 Data Conversion Attributes (C)
9.5.9 Airborne Hardware Attributes (H)

CHAPTER 9

TELEMETRY ATTRIBUTES TRANSFER STANDARD, Continued....

9.5.6.1 PCM Format Attributes (P)

9.5.6 Digital Data Attributes. The digital data attributes are separated into three groups containing PCM-related attribute information. The PCM Format Attributes Group (P) is described in subparagraph 9.5.6.1. The PCM Measurement Description Attributes, contained in (D), are described in subparagraph 9.5.6.2. Subparagraph 9.5.6.3 depicts the MIL-STD-1553 Bus Data attributes (B).

9.5.6.1 PCM Format Attributes (P). The PCM Format Attributes Group contains the information required to decommutate the PCM data stream. Operations of both class I and II are included. (Limited information is incorporated for class II operation.) Figure 9-6 presents the flow and summary of the information required. In general, only standard methods of synchronization have been included except for cases where considerable application is already in place. Inclusion should not be taken to mean that the nonstandard approaches are better or desired. Table 9-5 contains the PCM Format Attributes. The group defines and specifies the frame format and the information necessary to set up the PCM decommutation. Refer to chapter 4 for the definition of terms (such as major and minor frames and subframes) and word numbering conventions.

PCM Format Attributes Group (P)

Figure 9-6. PCM Format Attributes Group (P).

TABLE 9-5. PCM FORMAT ATTRIBUTES GROUP (P)
R O W	PARAMETER	MAX FIELD SIZE	CODE NAME	DEFINITION
1	DATA LINK NAME	32	P-d\DLN	IDENTIFY THE DATA LINK NAME CONSISTENT WITH THE MUX/MOD GROUP.
INPUT DATA
2	PCM CODE	6	P-d\D1	DEFINE THE DATA FORMAT CODE: NRZ-L BIO-L NRZ-M BIO-M NRZ-S BIO-S RNRZ-L OTHER
3	BIT RATE	9	P-d\D2	DATA RATE IN BITS PER SECOND. SCIENTIFIC NOTATION MAY BE USED.
4	ENCRYPTED	1	P-d\D3	DATA IS ENCRYPTED - ‘E’ DATA IS UNENCRYPTED - ‘U’ IF THE DATA IS ENCRYPTED - PROVIDE DETAILS IN COMMENTS RECORD.
5	POLARITY	1	P-d\D4	DATA POLARITY: NORMAL – ‘N’ INVERTED – ‘I’.
6	AUTO-POLARITY CORRECTION	1	P-d\D5	IS AUTOMATIC POLARITY CORRECTION TO BE USED? YES – ‘Y’ NO – ‘N’.
7	DATA DIRECTION	1	P-d\D6	TIME SEQUENCE OF DATA: NORMAL – ‘N’ REVERSED – ‘R’.
8	DATA RANDOMIZED	1	P-d\D7	YES – ‘Y’ OR NO – ‘N’.
9	RANDOMIZER LENGTH	3	P-d\D8	SPECIFY THE RANDOMIZER LENGTH: STANDARD (15 BITS) – ‘STD’ OTHER – ‘OTH’, DEFINE IN COMMENTS RECORD. NOT APPLICABLE – ‘N/A’.
FORMAT
10	TYPE FORMAT	4	P-d\TF	TYPE OF PCM FORMAT: CLASS I – ‘ONE’ 1553 BUS – ‘1553’ ALTERNATE TAG AND DATA – ‘ALTD’ OTHER – ‘OTHR’. DESCRIBE IN COMMENTS RECORD.
11	COMMON WORD LENGTH	2	P-d\F1	NUMBER OF BITS IN COMMON WORD LENGTH.
12	WORD TRANSFER ORDER	1	P-d\F2	DEFINE THE DEFAULT FOR THE FIRST BIT TRANSFERRED IN NORMAL TIME SEQUENCE: MOST SIGNIFICANT BIT – ‘M’ LEAST SIGNIFICANT BIT – ‘L’.
13	PARITY	2	P-d\F3	NORMAL WORD PARITY EVEN – ‘EV’ ODD – ‘OD’ NONE – ‘NO’
14	PARITY TRANSFER ORDER	1	P-d\F4	PARITY BIT LOCATION LEADS WORD – ‘L’ TRAILS WORD – ‘T’.
MINOR FRAME
15	NUMBER OF MINOR FRAMES IN MAJOR FRAME	3	P-d\MF\N	NUMBER OF MINOR FRAMES IN A MAJOR FRAME.
16	NUMBER OF WORDS IN A MINOR FRAME	4	P-d\MF1	SPECIFY THE NUMBER OF WORDS IN A MINOR FRAME, AS DEFINED IN PARAGRAPH 4.3.
17	NUMBER OF BITS IN A MINOR FRAME	5	P-d\MF2	NUMBER OF BITS IN A MINOR FRAME INCLUDING MINOR FRAME SYNCHRONIZATION PATTERN.
18	SYNC TYPE	3	P-d\MF3	DEFINE MINOR FRAME SYNCHRONIZATION TYPE: FIXED PATTERN – ‘FPT’ OTHER – ‘OTH’.
SYNCHRONIZATION PATTERN
19	LENGTH	2	P-d\MF4	SPECIFY THE MINOR FRAME SYNCHRONIZATION PATTERN LENGTH IN NUMBER OF BITS.
20	PATTERN	33	P-d\MF5	DEFINE MINOR FRAME SYNCHRONIZATION PATTERN IN BITS (1s AND 0s) WITH THE LEFT MOST BIT AS THE "FIRST BIT TRANSMITTED."
SYNCHRONIZATION CRITERIA
21	IN SYNC CRITERIA	2	P-d\SYNC1	THIS SPECIFIES THE DESIRED CRITERIA FOR DECLARING THE SYSTEM TO BE IN SYNC: FIRST GOOD SYNC - 0 CHECK - NUMBER OF AGREES (1 OR GREATER) NOT SPECIFIED – ‘NS’.
22	SYNC PATTERN CRITERIA	2	P-d\SYNC2	NUMBER OF BITS WHICH MAY BE IN ERROR IN THE SYNCHRONIZATION PATTERN.
OUT OF SYNCHRONIZATION CRITERIA
23	NUMBER OF DISAGREES	2	P-d\SYNC3	SPECIFIES THE DESIRED CRITERIA FOR DECLARING THE SYSTEM OUT OF SYNC: NUMBER OF DISAGREES, NOT SPECIFIED – ‘NS’.
24	SYNC PATTERN CRITERIA	2	P-d\SYNC4	NUMBER OF BITS WHICH MAY BE IN ERROR IN THE SYNCHRONIZATION PATTERN.
MINOR FRAME FORMAT DEFINITION
25	WORD NUMBER	4	P-d\MFW1-n	WORD POSITION (#n) IN A MINOR FRAME OR FOR CLASS II SYSTEMS THE POSITION IN THE DEFINED FRAME. WORD POSITION 1 FOLLOWS THE SYNCHRONIZATION PATTERN.
26	NUMBER OF BITS IN WORD	2	P-d\MFW2-n	THE NUMBER OF BITS IN WORD POSITION #n. IF DEFAULT VALUE DO NOT INCLUDE.
THE ABOVE PAIR SET MUST BE DEFINED FOR ALL WORDS WHICH HAVE A LENGTH OTHER THAN THE COMMON WORD LENGTH. THEREFORE, ALL WORD POSITIONS NOT INCLUDED IN THE ABOVE WILL HAVE THE COMMON WORD LENGTH AS A DEFAULT VALUE.
SUBFRAME SYNCHRONIZATION
27	NUMBER OF SUBFRAME ID COUNTERS	2	P-d\ISF\N	SPECIFY THE NUMBER OF SUBFRAME ID COUNTERS DEFINED WITHIN THE MINOR FRAME.
28	SUBFRAME ID COUNTER NAME	8	P-d\ISF1-n	SPECIFY THE SUBFRAME ID COUNTER NAME.
29	SUBFRAME SYNC TYPE	2	P-d\ISF2-n	DEFINE THE SUBFRAME SYNCHRONIZATION TYPE: ID COUNTER – ‘ID’ OTHER – ‘OT’, DEFINE IN COMMENTS.
ID COUNTER
30	SUBFRAME ID COUNTER LOCATION	4	P-d\IDC1-n	IF ID COUNTER IS DESIGNATED AS THE SUBFRAME SYNC TYPE, GIVE THE MINOR FRAME WORD POSITION OF THE COUNTER.
31	ID COUNTER WORD LENGTH	2	P-d\IDC2-n	SPECIFY THE MINOR FRAME WORD LENGTH OF THE WORD CONTAINING THE ID COUNTER, NUMBER OF BITS.
32	ID COUNTER MSB STARTING BIT LOCATION	2	P-d\IDC3-n	SPECIFY THE BIT LOCATION OF THE ID COUNTER MSB WITHIN THE WORD.
33	ID COUNTER LENGTH	2	P-d\IDC4-n	SPECIFY THE SUBFRAME ID COUNTER LENGTH. NUMBER OF BITS.
34	ID COUNTER TRANSFER ORDER	1	P-d\IDC5-n	SPECIFY WHETHER THE MOST OR LEAST SIGNIFICANT BIT IS TRANSFERRED FIRST: MOST SIGNIFICANT – ‘M’ LEAST SIGNIFICANT – ‘L’.
35	ID COUNTER INITIAL VALUE	3	P-d\IDC6-n	SPECIFY THE INITIAL VALUE OF THE ID COUNTER.
36	INITIAL COUNT SUBFRAME NUMBER	3	P-d\IDC7-n	SPECIFY THE MINOR FRAME NUMBER ASSOCIATED WITH THE INITIAL COUNT VALUE.
37	ID COUNTER END VALUE	3	P-d\IDC8-n	SPECIFY THE END VALUE OF THE ID COUNTER.
38	END COUNT SUBFRAME NUMBER	3	P-d\IDC9-n	SPECIFY THE MINOR FRAME NUMBER ASSOCIATED WITH THE END COUNT VALUE.
39	COUNT DIRECTION	3	P-d\IDC10-n	SPECIFY THE DIRECTION OF THE COUNT INCREMENT: INCREASING - ‘INC’ DECREASING – ‘DEC’.
SUBFRAME DEFINITION
40	NUMBER OF SUBFRAMES	4	P-d\SF\N-n	SPECIFY THE NUMBER OF SUBFRAMES ASSOCIATED WITH THE SUBFRAME ID COUNTER NAMED ABOVE.
41	SUBFRAME NAME	8	P-d\SF1-n-m	SPECIFY THE SUBFRAME NAME.
42	SUPERCOM	2	P-d\SF2-n-m	IF NOT SUPERCOMMUTATED ENTER ‘NO’. OTHERWISE ENTER THE NUMBER OF WORD POSITIONS.
43	LOCATION DEFINITION	2	P-d\SF3-n-m	IF SUPERCOMMUTATED, SPECIFY HOW THE WORD LOCATIONS ARE DEFINED: FIRST WORD AND INTERVAL – ‘FI’ EVERY LOCATION – ‘EL’ NOT APPLICABLE – ‘NA’.
44	SUBFRAME LOCATION	4	P-d\SF4-n-m-w	SPECIFY THE FIRST WORD WITHIN THE MINOR FRAME WHICH CONTAINS THE SUBFRAME IDENTIFIED. FOR THE CASE WHEN EVERY WORD LOCATION IS DEFINED, REPEAT THIS ENTRY FOR EACH WORD POSITION APPLICABLE. FOR THE FIRST WORD AND INTERVAL, INCLUDE THE NEXT ENTRY TO DEFINE THE INTERVAL.
45	INTERVAL	4	P-d\SF5-n-m	SPECIFY THE INTERVAL TO BE USED TO DEFINE THE SUBFRAME LOCATION.
46	SUBFRAME DEPTH	3	P-d\SF6-n-m	SPECIFY THE SUBFRAME DEPTH. IF NO ENTRY, THEN THE SUBFRAME ID COUNTER DEPTH WILL BE USED AS THE DEFAULT VALUE.
REPEAT THE ABOVE FOR EACH SUBFRAME IN THE MINOR FRAME FORMAT.
ASYNCHRONOUS EMBEDDED FORMAT
47	NUMBER OF ASYNCHRONOUS EMBEDDED FORMATS	1	P-d\AEF\N	SPECIFY THE NUMBER OF ASYNCHRONOUS EMBEDDED FORMATS: ONE – ‘1’ TWO – ‘2’ NONE – ‘0’.
48	DATA LINK NAME	32	P-d\ AEF\DLN-n	PROVIDE THE DATA LINK NAME FOR THIS ASYNCHRONOUS EMBEDDED FORMAT. REPEAT NAME AND THE FOLLOWING ENTRIES FOR THE SECOND FORMAT, AS APPROPRIATE. (A SEPARATE DATA LINK DEFINITION MUST BE PROVIDED FOR EACH ASYNCHRONOUS EMBEDDED FORMAT.)
49	SUPERCOM	3	P-d\AEF1-n	IF THE ASYNCHRONOUS FORMAT IS NOT SUPERCOMMUTATED ENTER ‘NO’. OTHERWISE ENTER THE NUMBER OF HOST MINOR FRAME WORDS THAT ARE USED.
50	LOCATION DEFINITION	2	P-d\AEF2-n	IF SUPERCOMMUTATED, SPECIFY HOW THE WORD LOCATIONS ARE DEFINED: FIRST WORD AND INTERVAL – ‘FI’ EVERY LOCATION – ‘EL’ CONTIGUOUS WORDS – ‘CW’ NOT APPLICABLE – ‘NA’.
51	LOCATION	4	P-d\AEF3-n-w	SPECIFY THE FIRST WORD WITHIN THE MINOR FRAME WHICH CONTAINS THE ASYNCHRONOUS EMBEDDED FORMAT IDENTIFIED. FOR THE METHOD WHEN EVERY WORD LOCATION IS DEFINED, REPEAT THIS ENTRY FOR EACH WORD POSITION APPLICABLE. FOR THE FIRST WORD AND INTERVAL METHOD, INCLUDE THE NEXT ENTRY TO DEFINE THE INTERVAL.
52	INTERVAL	4	P-d\AEF4-n	SPECIFY THE INTERVAL TO BE USED TO DEFINE THE ASYNCHRONOUS EMBEDDED FORMAT LOCATION.
53	WORD LENGTH	2	P-d\AEF5-n-w	SPECIFY THE NUMBER OF EMBEDDED BITS IN THIS HOST WORD LOCATION.
54	MASK	64	P-d\AEF6-n-w	IF THE ASYNCHRONOUS PORTION OF THE WORD IS SHORTER THAN THE WORD LENGTH, THEN PROVIDE THE BINARY MASK REQUIRED TO INDICATE WHICH BITS ARE USED. (1'S USED, 0'S NOT USED) LEFTMOST BIT CORRESPONDS TO FIRST BIT TRANSMITTED.
FORMAT CHANGE
FRAME FORMAT IDENTIFIER
55	LOCATION	4	P-d\FFI1	SPECIFY THE POSITION IN THE MINOR FRAME WHICH CONTAINS THE FRAME FORMAT IDENTIFICATION (FFI) WORD. IF MORE THAN ONE WORD LOCATION PROVIDE THE DETAILS IN THE COMMENTS RECORD.
56	MASK	64	P-d\FFI2	IF THE FFI IS SHORTER THAN THE WORD LENGTH, THEN PROVIDE THE BINARY MASK REQUIRED TO INDICATE WHICH BITS ARE USED. LEFTMOST BIT CORRESPONDS TO FIRST BIT TRANSMITTED.
MEASUREMENT LIST CHANGE
57	NUMBER OF MEASUREMENT LISTS	2	P-d\MLC\N	SPECIFY THE NUMBER OF MEASUREMENT LISTS THAT ARE REQUIRED TO BE SELECTED. IF NONE ENTER ‘NO’. OTHERWISE ENTER THE NUMBER, n.
58	FFI PATTERN	16	P-d\MLC1-n	SPECIFY THE FFI PATTERN WHICH CORRESPONDS TO THE MEASUREMENT LIST(1s AND 0s). THIS ENTRY AND THE NEXT ARE AN ORDERED PAIR.
59	MEASUREMENT LIST NAME	32	P-d\MLC2-n	SPECIFY THE MEASUREMENT LIST NAME.
FORMAT STRUCTURE CHANGE
60	NUMBER OF FORMATS	2	P-d\FSC\N	SPECIFY NUMBER OF FORMATS THAT ARE TO BE DEFINED.
61	FFI PATTERN	16	P-d\FSC1-n	SPECIFY THE FFI PATTERN WHICH CORRESPONDS TO THE FORMAT WHICH IS DEFINED. THIS ENTRY AND THE FOLLOWING ARE AN ORDERED PAIR.
62	DATA LINK ID	32	P-d\FSC2-n	IDENTIFY THE FORMAT WHICH CORRESPONDS TO THIS FFI CODE.
ALTERNATE TAG AND DATA
63	NUMBER OF TAGS	3	P-d\ALT\N	SPECIFY THE NUMBER OF PARAMETERS WHICH ARE INCLUDED WITHIN THIS CATEGORY, THAT IS THE NUMBER OF TAGS.
64	NUMBER OF BITS IN TAG	2	P-d\ALT1	SPECIFY THE NUMBER OF BITS WHICH ARE IN THIS TAG.
65	NUMBER OF BITS IN DATA WORD	2	P-d\ALT2	SPECIFY THE NUMBER OF BITS WHICH ARE IN THE COMMON DATA WORD.
66	FIRST TAG LOCATION	2	P-d\ALT3	IDENTIFY THE LOCATION OF THE START OF THE FIRST TAG LOCATION IN TERMS OF BITS WITH THE FIRST BIT POSITION AFTER THE SYNCHRONIZATION PATTERN BEING NUMBER 1.
67	SEQUENCE	1	P-d\ALT4	IF THE TAG/DATA WORD SEQUENCE IS TAG THEN DATA ENTER ‘N’ FOR NORMAL, IF THE DATA PRECEDES THE TAG ENTER ‘R’ FOR REVERSED.
ASYNCHRONOUS DATA MERGE FORMAT
68	NUMBER OF ASYNCHRONOUS DATA MERGE FORMATS	1	P-d\ADM\N	SPECIFY THE NUMBER OF ASYNCHRONOUS DATA MERGE FORMATS.
69	ASYNCHRONOUS DATA MERGE NAME	32	P-d\ADM\DMN-n	PROVIDE THE DATA MERGE NAME FOR THIS ASYNCHRONOUS DATA MERGE FORMAT. THIS CAN BE USED TO IDENTIFY THE SOURCE OF THE DATA MERGE FORMAT, AS APPROPRIATE. (USE THE COMMENTS FIELD TO DESCRIBE THIS DATA SOURCE FOR THE ASYNCHRONOUS DATA MERGE FORMAT.)
70	SUPERCOM	3	P-d\ADM1-n	IF THE ASYNCHRONOUS DATA MERGE FORMAT IS NOT SUPERCOMMUTATED ENTER - ‘NO’, OTHERWISE ENTER THE NUMBER OF HOST MINOR FRAME WORDS THAT ARE USED.
71	LOCATION DEFINITION	2	P-d\ADM2-n	IF SUPERCOMMUTATED, SPECIFY HOW THE WORD LOCATIONS ARE DEFINED: FIRST WORD AND INTERVAL - ‘FI’ EVERY LOCATION - ‘EL’ CONTIGUOUS WORDS - ‘CW’ NOT APPLICABLE - ‘NA’
72	LOCATION	4	P-d\ADM3-n-w	SPECIFY THE FIRST WORD WITHIN THE MINOR FRAME WHICH CONTAINS THE ASYNCHRONOUS DATA MERGE FORMAT IDENTIFIED. FOR THE METHOD WHEN EVERY WORD LOCATION IS DEFINED, REPEAT THIS ENTRY FOR EACH WORD POSITION APPLICABLE. FOR THE FIRST WORD AND INTERVAL METHOD, INCLUDE THE NEXT ENTRY TO DEFINE THE INTERVAL.
73	INTERVAL	4	P-d\ADM4-n	SPECIFY THE INTERVAL TO BE USED TO DEFINE THE ASYNCHRONOUS DATA MERGE FORMAT LOCATION.
74	DATA LENGTH	2	P-d\ADM5-n	SPECIFY THE NUMBER OF DATA BITS USED IN THIS DATA MERGE FORMAT.
75	MSB LOCATION	2	P-d\ADM6-n	PROVIDE THE MOST SIGNIFICANT BIT (MSB) POSITION WITHIN THE HOST MINOR FRAME LOCATION.
76	PARITY	2	P-d\ADM7-n	IF USED, SPECIFY THE PARITY INFORMATION: EVEN - ‘EV’, ODD - ‘OD’, NONE - ‘NO’.
COMMENTS
77	COMMENTS	6400	P-d\COM	PROVIDE ANY ADDITIONAL REQUIRED OR DESIRED INFORMATION.

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