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On 19/06/2011 13:57, Jason KG4WSV wrote:
<blockquote
cite="mid:BANLkTi=+_Ks7z57+g=EVpu52BJ9hUP1sPA@mail.gmail.com"
type="cite"><br>
<br>
<div class="gmail_quote">On Sun, Jun 19, 2011 at 3:08 AM, Max
Harper <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:kg4pid@yahoo.com">kg4pid@yahoo.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
What type of error checking does APRS have to prevent corrupt
data?</blockquote>
</div>
<br>
APRS doesn't have any, but APRS is transmitted in AX.25 packets
(on VHF, anyway), and AX.25 has a 16 bit checksum (known as the
FCS) to verify the data.<br>
</blockquote>
And one day perhaps we should add the ability to also correct such
errors ? For example, the day when we have all moved to speeds
greater than 1200 (or at most 9600) bits/s...<br>
<blockquote
cite="mid:BANLkTi=+_Ks7z57+g=EVpu52BJ9hUP1sPA@mail.gmail.com"
type="cite">-Jason<br>
kg4wsv<br>
</blockquote>
73,<br>
<br>
Guido IZ6RDB<br>
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