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)
9.5.6.3 1553 Bus Data Attributes (B)
9.5.7 PAM Attributes (A)
9.5.9 Airborne Hardware Attributes (H)

CHAPTER 9

TELEMETRY ATTRIBUTES TRANSFER STANDARD, Continued....

9.5.8 Data Conversion Attributes (C)

9.5.8 Data Conversion Attributes (C). The Data Conversion Attributes Group includes a definition of the method by which the raw telemetry data is to be converted to meaningful information. The sensor calibration is contained in the group for each type of sensor which uses a standard calibration curve or for each sensor or parameter which has a unique calibration requirement. The calibration information can be entered in several different formats. Provision is made to permit a test organization to convert data set entries to coefficients of an appropriate curve fit and record the derived coefficients. Figure 9-10 shows the structure of the data conversion attributes. Table 9-9 contains the detailed information required.

For reference purposes, the following telemetry unit definitions apply: PCM - natural binary range as indicated by binary format entry PAM - 0 to full scale (100) FM (Analog) - lower band edge (-100) to upper band edge (+100)

Figure 9-10. Data Conversion Attributes Group (C).

TABLE 9-9. DATA CONVERSION ATTRIBUTES GROUP (C)
R O W	PARAMETER	MAX FIELD SIZE	CODE NAME	DEFINITION
1	MEASUREMENT NAME	32	C-d\DCN	GIVE THE MEASUREMENT NAME.
TRANSDUCER INFORMATION
2	TYPE	32	C-d\TRD1	TYPE OF SENSOR, IF APPROPRIATE.
3	MODEL NUMBER	32	C-d\TRD2	IF APPROPRIATE.
4	SERIAL NUMBER	32	C-d\TRD3	IF APPLICABLE.
5	SECURITY CLASSIFICATION	2	C-d\TRD4	ENTER THE SECURITY CLASSIFICATION OF THIS MEASURAND. UNCLASSIFIED – ‘U’ CONFIDENTIAL – ‘C’ SECRET – ‘S’ TOP SECRET – ‘T’ OTHER – ‘O’. APPEND THE FOLLOWING: IF RECEIVED TELEMETRY SIGNAL (COUNTS) IS CLASSIFIED ADD ‘R’. IF EXPRESSED IN ENGINEERING UNITS AND THE MEASURAND VALUE IS CLASSIFIED ADD ‘E’. IF BOTH ARE CLASSIFIED ADD ‘B’.
6	ORIGINATION DATE	10	C-d\TRD5	DATE OF ORIGINATION OF THIS DATA FILE. MM- MONTH. DD- DAY. YYYY- YEAR (MM-DD-YYYY).
7	REVISION NUMBER	4	C-d\TRD6	SPECIFY THE REVISION NUMBER OF THE DATA PROVIDED.
8	ORIENTATION	32	C-d\TRD7	DESCRIBE THE PHYSICAL ORIENTATION OF THE SENSOR.
9	POINT OF CONTACT: NAME AGENCY ADDRESS TELEPHONE	24 48 48 20	C-d\POC1 C-d\POC2 C-d\POC3 C-d\POC4	POINT OF CONTACT WITH THE ORGANIZATION THAT PROVIDED THE CALIBRATION DATA.
MEASURAND
10	DESCRIPTION	64	C-d\MN1	DESCRIBE THE PARAMETER BEING MEASURED.
11	MEASUREMENT ALIAS	32	C-d\MNA	ALTERNATE MEASURAND NAME.
12	EXCITATION VOLTAGE	10	C-d\MN2	SENSOR REFERENCE VOLTAGE IN VOLTS.
13	ENGINEERING UNITS	16	C-d\MN3	DEFINE THE ENGINEERING UNITS APPLICABLE TO THE OUTPUT DATA.
14	LINK TYPE	3	C-d\MN4	DEFINE THE SOURCE DATA LINK TYPE: FM(ANALOG) – ‘ANA’ PCM – ‘PCM’ PAM – ‘PAM’ OTHER – ‘OTH’.
TELEMETRY VALUE DEFINITION
15	BINARY FORMAT	3	C-d\BFM	FORMAT OF THE BINARY INFORMATION: INTEGER – ‘INT’ UNSIGNED INTEGER BINARY – ‘UNS’ SIGN AND MAGNITUDE BINARY – ‘SIG’ ONE'S COMPLEMENT – ‘ONE’ TWO'S COMPLEMENT – ‘TWO’ OFFSET BINARY – ‘OFF’ FLOATING POINT – ‘FPT’ OTHER – ‘OTH’, DEFINE IN COMMENTS
IN-FLIGHT CALIBRATION
16	NUMBER OF POINTS	1	C-d\MC\N	IS IN-FLIGHT CALIBRATION REQUIRED? ‘N’ FOR NO OR A NUMBER BETWEEN 1 AND 5, IF IT IS REQUIRED. A MAXIMUM OF FIVE CALIBRATION POINTS MAY BE INCLUDED.
17	STIMULUS	32	C-d\MC1-n	PROVIDE THE STIMULUS FOR THIS CALIBRATION POINT.
18	TELEMETRY VALUE	16	C-d\MC2-n	TELEMETRY UNITS VALUE.
19	DATA VALUE	32	C-d\MC3-n	ENGINEERING UNITS VALUE. SCIENTIFIC NOTATION MAY BE USED.
THE ABOVE SET OF THREE ENTRIES MUST BE REPEATED FOR EACH IN-FLIGHT CALIBRATION POINT.
AMBIENT VALUE
20	NUMBER OF AMBIENT CONDITIONS	1	C-d\MA\N	NUMBER OF STATIC OR SIMULATED CONDITIONS.
21	STIMULUS	32	C-d\MA1-n	DESCRIPTION OF THE STATIC ENVIRONMENT IN WHICH A NON-TEST STIMULUS OR SIMULATOR IS THE DATA SOURCE.
22	TELEMETRY VALUE	16	C-d\MA2-n	TELEMETRY UNITS VALUE FOR THE STATIC STIMULUS.
23	DATA VALUE	32	C-d\MA3-n	ENGINEERING UNITS VALUE FOR THE STATIC OR SIMULATED CONDITION. SCIENTIFIC NOTATION MAY BE USED.
OTHER INFORMATION
24	HIGH MEASUREMENT VALUE	32	C-d\MOT1	HIGHEST ENGINEERING UNIT VALUE DEFINED BY THE CALIBRATION DATA. SCIENTIFIC NOTATION MAY BE USED.
25	LOW MEASUREMENT VALUE	32	C-d\MOT2	LOWEST ENGINEERING UNIT VALUE DEFINED IN THE CALIBRATION DATA. SCIENTIFIC NOTATION MAY BE USED.
26	HIGH ALERT LIMIT VALUE	32	C-d\MOT3	HIGHEST ENGINEERING UNIT VALUE EXPECTED OR SAFE OPERATING VALUE OF THE PARAMETER. (‘RED’) SCIENTIFIC NOTATION MAY BE USED.
27	LOW ALERT LIMIT VALUE	32	C-d\MOT4	LOWEST ENGINEERING UNIT VALUE EXPECTED OR THE SAFE OPERATING VALUE OF THE PARAMETER. (‘RED’) SCIENTIFIC NOTATION MAY BE USED.
28	HIGH WARNING LIMIT VALUE	32	C-d\MOT5	HIGHEST ENGINEERING UNIT VALUE EXPECTED OR SAFE OPERATING VALUE OF THE PARAMETER. ("YELLOW") SCIENTIFIC NOTATION MAY BE USED.
29	LOW WARNING LIMIT VALUE	32	C-d\MOT6	LOWEST ENGINEERING UNIT VALUE EXPECTED OR THE SAFE OPERATING VALUE OF THE PARAMETER. ("YELLOW") SCIENTIFIC NOTATION MAY BE USED.
30	SAMPLE RATE	6	C-d\SR	ENTER THE SAMPLE RATE IN TERMS OF SAMPLES/SECOND.
DATA CONVERSION
31	CONVERSION TYPE	3	C-d\DCT	DEFINE THE CHARACTERISTICS OF THE DATA CONVERSION: NONE – ‘NON’ ENGINEERING UNITS: PAIR SETS – ‘PRS’ COEFFICIENTS – ‘COE’ DERIVED – ‘DER’ DISCRETE – ‘DIS’ PCM TIME – ‘PTM’ 1553 TIME – ‘BTM’ DIGITAL VOICE – ‘VOI’ DIGITAL VIDEO – ‘VID’ SPECIAL PROCESSING – ‘SP’, (ENTER IN COMMENTS). OTHER – ‘OTH’
ENGINEERING UNITS CONVERSION
PAIR SETS
32	NUMBER OF SETS	2	C-d\PS\N	SPECIFY THE NUMBER OF PAIR SETS PROVIDED, n.
33	APPLICATION	1	C-d\PS1	ARE THE PAIR SETS TO BE USED TO DEFINE A POLYNOMIAL CURVE FIT? ‘Y’ (YES) OR ‘N’ (NO). IF THE ANSWER IS NO, THEN THE PAIR SETS ARE TO BE USED AS A "TABLE LOOKUP" WITH LINEAR INTERPOLATION BETWEEN THE DEFINED POINTS.
34	ORDER OF FIT	2	C-d\PS2	SPECIFY THE ORDER OF THE CURVE FIT TO BE PERFORMED, m. AT LEAST 2 PAIR SETS MUST BE PROVIDED AND A MAXIMUM OF 32 PAIR SETS MAY BE INCLUDED. 12 OR MORE PAIR SETS ARE RECOMMENDED FOR A FIFTH ORDER FIT.
35	TELEMETRY VALUE	16	C-d\PS3-n	TELEMETRY UNITS VALUE.
36	ENGINEERING UNITS VALUE	32	C-d\PS4-n	ENGINEERING UNITS VALUE. SCIENTIFIC NOTATION MAY BE USED.
REPEAT THE ABOVE FOR THE n DATA SETS
COEFFICIENTS
37	ORDER OF CURVE FIT	2	C-d\CO\N	SPECIFY THE ORDER OF THE POLYNOMIAL CURVE FIT, n.
38	DERIVED FROM PAIR SET	1	C-d\CO1	WERE THE COEFFICIENTS DERIVED FROM THE PAIR SET CALIBRATION DATA PROVIDED? (‘Y’ OR ‘N’) IF YES, PROVIDE A POINT OF CONTACT IN THE COMMENTS RECORD.
39	COEFFICIENT (O)	32	C-d\CO	VALUE OF THE ZERO ORDER TERM (OFFSET). SCIENTIFIC NOTATION MAY BE USED.
40	N-TH COEFFICIENT	32	C-d\CO-n	VALUE OF THE COEFFICIENT OF THE N-TH POWER OF X (FIRST ORDER COEFFICIENT IS THE EQUIVALENT OF BIT WEIGHT). SCIENTIFIC NOTATION MAY BE USED.
REPEAT UNTIL ALL N+1 COEFFICIENTS ARE DEFINED
OTHER
41	DEFINITION OF OTHER DATA CONVERSION	1000	C-d\OTH	DEFINE OTHER DATA CONVERSION TECHNIQUE OR SPECIAL PROCESSING REQUIREMENT.
DERIVED PARAMETER
42	NUMBER OF INPUT MEASURANDS	2	C-d\DP\N	SPECIFY THE NUMBER OF INPUT MEASURANDS USED TO DERIVE THIS PARAMETER.
43	MEASURAND #N	32	C-d\DP-n	SPECIFY THE NAME OF THE N-TH INPUT MEASURAND.
CONTINUE UNTIL ALL n MEASURANDS ARE DEFINED.
44	NUMBER OF INPUT CONSTANTS	2	C-d\DPC\N	SPECIFY THE NUMBER OF INPUT CONSTANTS USED TO DERIVE THIS PARAMETER.
45	CONSTANT #N	32	C-d\DPC-n	SPECIFY THE VALUE FOR THE N-TH CONSTANT. SCIENTIFIC NOTATION MAY BE USED.
CONTINUE UNTIL ALL n CONSTANTS ARE DEFINED.
46	ALGORITHM	240	C-d\DPA	DEFINE THE ALGORITHM TO BE USED IN DERIVING THE PARAMETER.
DISCRETE
47	NUMBER OF EVENTS	2	C-d\DIC\N	HOW MANY EVENTS ARE ASSOCIATED WITH THIS DISCRETE FIELD, n?
48	NUMBER OF INDICATORS	2	C-d\DICI\N	NUMBER OF INDICATORS: FOR A PCM SYSTEM, PROVIDE THE NUMBER OF BITS USED FOR THIS DISCRETE SET. FOR A PAM OR ANALOG CHANNEL PROVIDE THE NUMBER OF LEVELS USED TO DEFINE THIS DISCRETE SET.
49	CONVERSION DATA	16	C-d\DICC-n	TELEMETRY VALUE, COUNTS FOR PCM, PERCENT OF FULL SCALE FOR PAM OR ANALOG.
50	PARAMETER EVENT DEFINITION	240	C-d\DICP-n	DEFINE THE EVENT FOR THE BIT OR BIT FIELD IN A WORD THAT CORRESPONDS TO A DISCRETE EVENT OR THE PERCENT FULL SCALE VALUE SUCH AS SWITCH ON OR OFF.
CONTINUE TO DEFINE THE EVENTS FOR EACH BIT PATTERN OR VALUE OF THE DISCRETE MEASURAND.
PCM TIME
51	PCM TIME WORD FORMAT	1	C-d\PTM	SPECIFY THE PCM TIME WORD FORMAT USED, AS DEFINED IN PARAGRAPH 4.7. HIGH ORDER TIME - ‘H’ LOW ORDER TIME - ‘L’ MICROSECOND TIME - ‘M’
1553 TIME
52	1553 TIME WORD FORMAT	1	C-d\BTM	SPECIFY THE 1553 TIME WORD FORMAT USED, AS DEFINED IN PARAGRAPHS 4.7 AND 8.5. HIGH ORDER TIME - ‘H’ LOW ORDER TIME - ‘L’ MICROSECOND TIME - ‘M’ RESPONSE TIME - ‘R’
DIGITAL VOICE
53	ENCODING METHOD	4	C-d\VOI\E	SPECIFY THE VOICE ENCODING METHOD USED. CVSD – ‘CVSD’, OTHER – ‘OTHR’
54	DESCRIPTION	640	C-d\VOI\D	SPECIFY THE DECODING ALGORITHM TO BE USED.
DIGITAL VIDEO
55	ENCODING METHOD	64	C-d\VID\E	SPECIFY THE VIDEO ENCODING METHOD USED.
56	DESCRIPTION	640	C-d\VID\D	SPECIFY THE DECODING ALGORITHM TO BE USED.
COMMENTS
57	COMMENTS	3200	C-d\COM	PROVIDE ANY OTHER INFORMATION REQUIRED OR DESIRED.

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