Content deleted Content added
Removed spurious line that looked like vandalism - line read: "IRIG-B is a different form....of time...*mind blown*" |
→Time code structure: Added table showing structure (adapted from WWVB table) |
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Line 131:
Unassigned 9-bit fields between consecutive marker bits are available for user-defined "control functions".
{|class=wikitable style="text-align:center;"
|+ IRIG A time code structure
! Bit || Weight || Meaning
|rowspan=21|
! Bit || Weight || Meaning
|rowspan=21|
! Bit || Weight || Meaning
|rowspan=21|
! Bit || Weight || Meaning
|rowspan=21|
! Bit || Weight || Meaning
|-
|bgcolor=lightpink| 00 ||bgcolor=lightpink| P<sub>r</sub> ||bgcolor=lightpink| Frame marker
| 20 || 1 ||rowspan=7| Hours<br/>(0–24)
| 40 || 100 ||rowspan=2| Day of year<br/>(1–366)
|bgcolor=lightgrey| 60 ||bgcolor=lightgrey| 0 ||rowspan=9 bgcolor=lightgrey| Unused
| 80 || 1 ||rowspan=18| Straight Binary Seconds<br/>(0–86399)
|-
| 01 || 1 ||rowspan=8| Seconds<br/> (00–59)
| 21 || 2
| 41 || 200
|bgcolor=lightgrey| 61 ||bgcolor=lightgrey| 0
| 81 || 2
|-
| 02 || 2
| 22 || 4
|bgcolor=lightgrey| 42 ||bgcolor=lightgrey| 0 ||rowspan=3 bgcolor=lightgrey| Unused
|bgcolor=lightgrey| 62 ||bgcolor=lightgrey| 0
| 82 || 4
|-
| 03 || 4
| 23 || 8
|bgcolor=lightgrey| 43 ||bgcolor=lightgrey| 0
|bgcolor=lightgrey| 63 ||bgcolor=lightgrey| 0
| 83 || 8
|-
| 04 || 8
|bgcolor=lightgrey| 24 ||bgcolor=lightgrey| 0
|bgcolor=lightgrey| 44 ||bgcolor=lightgrey| 0
|bgcolor=lightgrey| 64 ||bgcolor=lightgrey| 0
| 84 || 16
|-
|bgcolor=lightgrey| 05 ||bgcolor=lightgrey| 0
| 25 || 10
| 45 || 0.1 ||rowspan=4|Tenths of seconds<br/>(0.0–0.9)
|bgcolor=lightgrey| 65 ||bgcolor=lightgrey| 0
| 85 || 32
|-
| 06 || 10
| 26 || 20
| 46 || 0.2
|bgcolor=lightgrey| 66 ||bgcolor=lightgrey| 0
| 86 || 64
|-
| 07 || 20
|bgcolor=lightgrey| 27 ||bgcolor=lightgrey| 0 ||rowspan=2 bgcolor=lightgrey| Unused
| 47 || 0.4
|bgcolor=lightgrey| 67 ||bgcolor=lightgrey| 0
| 87 || 128
|-
| 08 || 40
|bgcolor=lightgrey| 28 ||bgcolor=lightgrey| 0
| 48 || 0.8
|bgcolor=lightgrey| 68 ||bgcolor=lightgrey| 0
| 88 || 256
|- bgcolor=lightpink
| 09 || P<sub>1</sub> || Position identifier
| 29 || P<sub>3</sub> || Position identifier
| 49 || P<sub>5</sub> || Position identifier
| 69 || P<sub>7</sub> || Position identifier
| 89 || P<sub>9</sub>
|-
| 10 || 1 ||rowspan=8| Minutes<br/>(00–59)
| 30 || 1 ||rowspan=9| Day of year<br/>(1–366)
| 50 || 1 ||rowspan=9| Year<br/>(00–99)
|bgcolor=lightgrey| 70 ||bgcolor=lightgrey| 0 ||rowspan=9 bgcolor=lightgrey| Unused
| 90 || 512
|-
| 11 || 2
| 31 || 2
| 51 || 2
|bgcolor=lightgrey| 71 ||bgcolor=lightgrey| 0
| 91 || 1024
|-
| 12 || 4
| 32 || 4
| 52 || 4
|bgcolor=lightgrey| 72 ||bgcolor=lightgrey| 0
| 92 || 2048
|-
| 13 || 8
| 33 || 8
| 53 || 8
|bgcolor=lightgrey| 73 ||bgcolor=lightgrey| 0
| 93 || 4096
|-
|bgcolor=lightgrey| 14 ||bgcolor=lightgrey| 0
|bgcolor=lightgrey| 34 ||bgcolor=lightgrey| 0
|bgcolor=lightgrey| 54 ||bgcolor=lightgrey| 0
|bgcolor=lightgrey| 74 ||bgcolor=lightgrey| 0
| 94 || 8192
|-
| 15 || 10
| 35 || 10
| 55 || 10
|bgcolor=lightgrey| 75 ||bgcolor=lightgrey| 0
| 95 || 16384
|-
| 16 || 20
| 36 || 20
| 56 || 20
|bgcolor=lightgrey| 76 ||bgcolor=lightgrey| 0
| 96 || 32768
|-
| 17 || 40
| 37 || 40
| 57 || 40
|bgcolor=lightgrey| 77 ||bgcolor=lightgrey| 0
| 97 || 65536
|-
|bgcolor=lightgrey| 18 ||bgcolor=lightgrey| 0 ||bgcolor=lightgrey| Unused
| 38 || 80
| 58 || 80
|bgcolor=lightgrey| 78 ||bgcolor=lightgrey| 0
|bgcolor=lightgrey| 98 ||bgcolor=lightgrey| 0 ||bgcolor=lightgrey| Unused
|- bgcolor=lightpink
| 19 || P<sub>2</sub> || Position identifier
| 39 || P<sub>4</sub> || Position identifier
| 59 || P<sub>6</sub> || Position identifier
| 79 || P<sub>8</sub> || Position identifier
| 99 || P<sub>0</sub> || Position identifier
|}
==References==
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