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TELEMETRY ATTRIBUTES TRANSFER STANDARD FORMAT EXAMPLE General Information Group (G) Transmission Attributes Group (T-1) Tape Source Attributes Group (R-1) Multiplex/Modulation Groups (M-1, M-2, M-3) PCM Format Attributes Groups (P) PCM Measurement Description (D) Data Conversion Groups (C) The following example is for illustrative purposes and is by no means a complete attributes file; it is representative of the types of information likely to be transferred. Many attributes are purposely omitted to simplify the example. In some of the groups, only those entries necessary to link to other groups are provided. Attributes, which link the various groups together, are indicated in boldface. Selected attributes are described in text form as an aid to following the example. All text, which describes the example, is printed in italics. All text, which is part of the example file, is printed in plain text. The example file being transferred consists of the attributes of a single RF data source and an analog tape containing two data sources. The RF data source is a PCM signal, which contains an embedded asynchronous wave train. The two recorded data sources are PCM signals: one is an aircraft telemetry stream, and the other is a radar data telemetry stream. Figure J-1 shows the example file in terms of the attribute groups and their interrelationships. Refer to the attribute tables while reviewing the example.  |
| Program name, test name, origination date, revision number: 0, test number: 13 |
| Live data source |
| Tape source. |
| Frequency: 1489.5, RF bandwidth: 100, data bandwidth: 100; not encrypted, modulation type: FM, total carrier modulation: 500, no subcarriers, transmit polarization: linear. |
| Tape width: 1 inch, reel diameter: 14 inches, 14 tracks, record speed: 7.5 inches/second. |
| Rewound: Yes, manufacturer: ZZ; model: 13, original: yes. |
| Track Number 2 contains aircraft telemetry PCM (w/subframe fragmented) |
| Track Number 4 contains Space Position Information via PCM link |
| Baseband type: PCM, modulation sense: POS, baseband data: PCM, low pass filter type: constant amplitude |
| P-1 is a live PCM signal and contains the asynchronous wave
train (see figure J-2). P-2 is a recorded signal (see figure J-3). P-3 is the asynchronous wave train (see figure J-4). P-4 is a recorded signal. |
| Live PCM signal (host wave train) : Class I |
| 10 bits default word length, 16 minor frames/major frame, 43 words/frame |
| Word position #10, 8 bits, Word position #11, 12 bits |
| One subframe ID counter |
| ID counter word length : 10 bits, MSB starting bit location : 7, ID counter length : 4 |
| Subframe definition SUB42 is located at 42, SUB15 at 15. All have depth 16. |
| Asynchronous embedded wave train information Data Link Name (to be referenced in the format definition of the asynchronous wave train) is ASYNC. Five contiguous minor frame word positions starting at location 6. |
| Recorded PCM signal format attributes. Data Link Name is PCM1, Data Format is NRZ-L, Bit rate is 2 Mbit/sec, Unencrypted, Normal polarity, class I, Common word length is 10, MSB first, No parity, 64 minor frames per major frame, 277 words per minor frame, Sync pattern length is 30. Word position 121 is 6 bits. Word position 122 is 4 bits. |
| Subframe characteristics: One subframe ID counter named 1. Sync type is ID counter. ID counter location is 13. ID counter word length is 10. ID counter MSB location is 5. ID counter length is 6. ID counter transfer order is MSB first. ID counter initial value is 0. ID counter initial subframe is 1. ID counter end value is 63. ID counter end subframe is 64. ID counter is increasing. Two subframes. First subframe name is SUB121. Not supercommutated, subframe location = word position 121, depth = 32. Second subframe name is SUB113. Not supercommutated, location = 113, depth = 32. |
| Asynchronous wave train PCM format attributes. Data Link Name: ASYNC Class I, Common word length : 16, LSB transfer order, no parity 3 minor frames per major frame, 50 words/minor frame, 800 bits per minor frame, fixed pattern synchronization, 16 bit syncpattern. |
| Subframe definition. Three subframes with ID counter word length 16 at word position 1. |
| ASUB1 is at word position 3. ASUB2 is at word position 45. ASUB3 is supercommutated at word positions 14 and 39. |
| D-1 contains the measurements which make up the asynchronous wave
train, D-2 contains the measurements which make up the live PCM signal (which hosts the asynchronous wave train), D-3 contains the measurements which make up one of the recorded PCM signals, and D-4 contains the measurements which make up the other recorded PCM signal. |
| Asynchronous Wave Train: One measurement list, 4 measurements |
| Measurement Name : J896D, LSB first, Subframe supercommutated, 2 locations: 1 and 4 of ASUB3 |
| Measurement Name: J951V, LSB first, default parity, subframe ASUB1, location 1 |
| Measurement Name : J971U, LSB first, supercommutated at positions 2, 11, 20, 29, 33, and 47. |
| Measurement Name : J966X, LSB first, subframe ASUB2, location 3. |
| Live PCM signal: single measurement list, 2 measurements |
| Measurement name: E1250T, unclassified, unsigned, MSB first |
| Measurement name: W862P, unclassified, MSB first, subframe name: SUB42, location 8 in subframe, full word |
| Recorded PCM signal: single measurement list: 1 measurement |
| Measurement name: 82AJ01, subframe fragmented, 2 fragments, subframes: SUB113 and SUB121, subframe location: 5 |
| Recorded PCM signal |
| C-1 and C-2 are measurements which are part of the live PCM
signal (see also D-2). C-3, C-4, C-5, and C-6 are from the asynchronous wave train (see also D-1). C-7 is from the recorded PCM signal (see also D-3). Measurement: E1250T, description: Inlet Temp Bellmouth, units: Deg C, binary format: unsigned; high value: 128, low value: -0.4, conversion type: pair sets, number of pair sets: 2, application (polynomial) : Yes; order of fit: 1, telemetry value #1: 0, engineering unit value #1: -0.4, telemetry value #2: 1023, engineering unit value #2: 128. |
| Measurement: W862P, description: Fuel Pump Inlet, binary format: unsigned; conversion type: pair sets, number of pair sets: 2, application (polynomial): Yes; order of fit: 1, telemetry value #1: 0, engineering unit value #1: -0.1 telemetry value #2: 1023, engineering unit value #2: 76.7 |
| Measurement: J896D, description: Terrian Altitude, units: Feet, binary format: two’s complement; high value: 32768, low value: -32768, conversion type: pair sets; number of pair sets: 2, application (polynomial): Yes, order of fit: 1, telemetry value #1: -32768, engineering unit value #1: -32768, telemetry value #2: 32767, engineering unit value #2: 32767 |
| Measurement: J951V, description: Throttle Command, units: VDC, high value: 10.164, low value: -10.164, conversion type: pair sets, number of pair sets: 2, application(polynomial): Yes, order of fit: 1, telemetry value #1: -128, engineering unit value #1: -10.164, telemetry value #2: 127, engineering unit value #2: 10.164 binary format: two's complement; |
| Measurement: J971U; description: DISC, conversion type: discrete, binary format: unsigned |
| Measurement: J966X; description: Discrete, conversion type: discrete, binary format: unsigned |
| Measurement: 82AJ01, description: LANTZ Norm acceleration, units: MTR/S/S, High value: 1023.97, Low value: -1023.97, conversion type: Coefficients Order of curve fit: 1, derived from pair sets: No, Coefficient (0): 0, Coefficient(1): 0.03125, binary format: two's complement |
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