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Undid revision 846624354 by 209.48.147.94 (talk) |
m Added calculations for IRIG Code B columns. Added a table to show examples of the IRIG J-xy formula. |
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| 1 Hz || 1 s || 60 || 1 minute || {{frac|60}} Hz
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'''IRIG Code B Calculation''':<br>
Bit rate = 100 Hz = 100 * (1 / second) = 100 / second = 100 / 1000ms = 1 / 10ms<br>
Bit time = 1 / (Bit rate) = 1 / (1 / 10ms) = 10ms<br>
There are 100 Bits per frame.<br>
Frame time = (Bits per frame) * (Bit time) = 100 * 10ms = 1000ms = 1 second<br>
Frame rate = 1 / (Frame time) = 1 / 1 second = 1 Hz<br>
<br>
The bits are modulated on a carrier. A three-digit suffix specifies the type and frequency of the carrier, and which optional information is included:
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Normally used combinations are J-12 through J-14 (300, 600, and 1200 baud), and J-25 through J-29 (2400 through 38400 baud).
{| class="wikitable"
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! Combination J-xy !! variant (x) !! y !! 2^y !! Baud = 75 * 2^y
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| J-12|| 1|| 2|| 4|| 300
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| J-13|| 1|| 3|| 8|| 600
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| J-14|| 1|| 4|| 16|| 1200
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| || || || ||
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| J-25|| 2|| 5|| 32|| 2400
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| J-26|| 2|| 6|| 64|| 4800
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| J-27|| 2|| 7|| 128|| 9600
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| J-28|| 2|| 8 || 256|| 19200
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| J-29|| 2|| 9|| 512|| 38400
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|}
== See also ==
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