- From: James Cutler <jwc@Stanford.EDU>
- Date: Fri, 11 Feb 2000 09:59:20 -0800 (PST)
Just a quick clarification on our beacons. We are putting
out two. One is a short AX25 packet that nominally broascast
every 10 seconds. Occasionally the period is once a minute.
Our second beacon is short CW signal that encodes a two bit
state summary of Opal. The bits are encoded into a CW pulse
of the same length, t. A zero is represented by a CW signal
of length t. A one is represented by a CW signal of length
t/2, followed by silence of t/2.
A 01 transmission would look like:
| 0 | 1 |
___---------_______
A 10 tranmission would look like:
| 1 | 0 |
___---___-------___
We are expecting a 10 or 01. I don't know what this is
in Morse. I'm a technician no code!
But that could help in distinguishing Opal and teh SCU
picos.
--Jamie
jwc@stanford.edu
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