Work on docs

pull/1/head
Andreas Eversberg 3 years ago
parent 570b2a5bca
commit 0cfcf67157
  1. 10
      docs/eurosignal.html

@ -76,7 +76,7 @@ The system puts the number into a queue, so that simultaneous calls can be handl
<p>
A train of paging messages are transmitted without interruption.
There are two types of messages: A paging message and an idle message.
Each message was about 8.2 seconds long, divided into a sequence of tones.
Each message is 0.82 seconds long, divided into a sequence of tones.
</p>
<p>
@ -94,7 +94,7 @@ This is how a paging message looks like:
<p>
The digit clock is retrieved from the change of tones.
If two subsequent digits are the same, the second digit was replaced by a 'Repeat' digit, so that there is always a change of tone between digits.
The Idle tone resets the receiver register and indicates a new message.
The Idle tone indicates a new message and resets the receiver's register to start over receiving a message.
A pager ID '122233' would be transmitted as 1-2-R-2-3-R.
A message is repeated multiple times, depending on the load of the system. (2-5 times ???)
If there is no message to be transmitted, the following idle message is sent.
@ -116,7 +116,7 @@ This is how an idle message looks like:
<p>
Here is a list of all frequencies used.
The distance between frequencies increases on higher frequencies, allowing simple RC filters to be used to detect the tones.
The distances between frequencies increase on higher frequencies (proportional to the frequency), allowing simple RC filters to be used to detect the tones.
</p>
<pre class="list">
@ -176,7 +176,8 @@ Base station for channel B ready, please tune transmitter and/or receiver to 87.
</pre>
<p>
If you don't have a FM transmitter instead of an AM transmitter, tune it 7.5 KHz below or above the indicated channel.
If you have an FM transmitter instead of an AM transmitter, tune it 7.5 KHz below or above the indicated channel.
Use narrow band deviation up to 5 kHz without pre-emphasis, if possible.
I suggest to use SDR, so check out the SDR page.
Then enter the ID of your pager. You will find it printed on the device and/or on the 18 pin chip inside.
If your pager's ID is 123456, enter it and press 'd' to start paging:
@ -208,6 +209,7 @@ eurosignal.c:760 info : Call has been disconnected by network.
<p>
In order to receive a paging message, use -R (--rx).
Then the software will decode the received IDs and display them.
You may also use both -R -T to allow the software to decode while it is encoding.
</p>
<hr><center>[<a href="index.html">Back to main page</a>]</center><hr>

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