work on docs

pull/1/head
Andreas Eversberg 2016-10-30 09:25:14 +01:00
parent bb92a1f3b0
commit b70f4ecebc
10 changed files with 42 additions and 21 deletions

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@ -74,7 +74,7 @@ The mobile station will only seize the channel, if the green light is on, otherw
When the user picks up the handset, the phone switches on its transmitter on up-link channel and transmits a continuous 1750 Hz calling tone.
The base station receives this tone and turns off its 2280 Hz idle tone.
The mobile station detects the tone is missing and turns off its 1750 calling tone.
The the speech path is connected through to an operator.
The base station detects the tone is missing and the speech path is connected through to an operator.
The operator asks for the mobile station number and the number to dial and places the call.
</p>
@ -170,7 +170,7 @@ There is no ring-back indication from the mobile station to the base station.
When the user picks up the handset, the phone switches on its transmitter on up-link channel and transmits a continuous 1750 Hz answer tone.
The base station receives this tone and turns off the four paging tones.
The mobile station detects the tone is missing and turns off its 1750 answer tone.
The the speech path is connected through to the caller (or operator).
The base station detects the tone is missing and the speech path is connected through to the caller (or operator).
</p>
<center><img src="a-netz-yellow.jpg"/></center>
@ -298,7 +298,7 @@ To automatically release the call, when the carrier signal gets lost, look at th
It is the same principle.
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@ -257,7 +257,7 @@ paging &amp; voice channel.
</pre>
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@ -628,7 +628,7 @@ The base station returns to idle.
Level adjustment:
We see a receive level of around 85%.
Tune your receiver to the up-link frequency, so you get loop-back of base station broadcast.
Use the variable resistor (connecting your transmitter) to adjust the volume until the received level matches the same level of your previously received bust.
Use the variable resistor (connecting your transmitter) to adjust the volume until the received level matches the same level of your previously received message.
In my case I adjust the transmitter to match around 85%. (+- 10% is good)
Now, whatever frequency deviation the phone transmits for signaling, so does your base station.
Use the other variable resistor (connecting your receiver) to adjust the volume until the level matches about 100%. (+- 10% is good)
@ -799,7 +799,7 @@ I call this "JPROM" (Jumper Programmable Read Only Memory).
<center><img src="b-netz_dioden2.jpg"/></center>
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@ -445,7 +445,7 @@ Level adjustment:
We see a receive level of around 96%.
This is already good, since I did the adjustment previously.
Tune your receiver to the up-link frequency, so you get loop-back of base station broadcast.
Use the variable resistor (connecting your transmitter) to adjust the volume until the received level matches the same level of your previously received bust.
Use the variable resistor (connecting your transmitter) to adjust the volume until the received level matches the same level of your previously received message.
In my case I adjust the transmitter to match around 96%. (+- 10% is good)
Now, whatever frequency deviation the phone transmits for signaling, so does your base station.
Use the other variable resistor (connecting your receiver) to adjust the volume until the level matches about 100%. (+- 10% is good)
@ -607,7 +607,7 @@ telegramm.c:1525 notice : Received Telegramm that is not used OgK channel signal
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@ -91,7 +91,7 @@ Finally store the settings using "alsactl store" command.
Do this whenever you want to keep your adjustments.
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@ -13,12 +13,32 @@
<br><br>
<center>
<img src="a-netz_small.jpg" title="A-Netz"/><img src="b-netz_small.jpg" title="B-Netz"/><br>
A-Netz phone in a Merceds Benz ; B-Netz cell tower in Bredstedt<br>
<img src="c-netz_small.jpg" title="C-Netz"/><img src="nmt_small.jpg" title="Nordisk Mobil Telefon"/><br>
my mother's C-Netz SIM card ; countries that developed NMT (Nordic Mobile Phone)<br>
<img src="amps_small.jpg" title="Advanced Mobile Phone Service"/><img src="setup_small.jpg"/><br>
AMPS (Advanced Mobile Phone Service) ; my radio setup<br>
<table border="0">
<tr>
<td><img src="a-netz_small.jpg" title="A-Netz"/></td>
<td><img src="b-netz_small.jpg" title="B-Netz"/></td>
</tr>
<tr>
<th>A-Netz phone in a Merceds Benz</th>
<th>B-Netz radio tower in Bredstedt</th>
</tr>
<tr>
<td><img src="c-netz_small.jpg" title="C-Netz"/></td>
<td><img src="nmt_small.jpg" title="Nordisk Mobil Telefon"/></td>
</tr>
<tr>
<th>my mother's C-Netz SIM card</th>
<th>NMT (Nordic Mobile Telephone)</th>
</tr>
<tr>
<td><img src="amps_small.jpg" title="Advanced Mobile Phone Service"/></td>
<td><img src="setup_small.jpg"/></td>
</tr>
<tr>
<th>AMPS (Advanced Mobile Phone Service)</th>
<th>my radio setup</th>
</tr>
</table>
</center>
<br><br>
@ -35,7 +55,7 @@ This project is pure software that requires a transmitter and a receiver connect
A second sound card or ISDN card is used to route calls from and to the mobile phone.
</p>
<h1>*this doc is under construction*</h1>
<center><h1>*this doc is under construction*</h1></center>
<center>
<ul>

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@ -62,7 +62,7 @@ To call phone, switch transmitter using pilot tone to 153.370 MHz
Do you hear the whistling sound on your speaker/headset? Now you can continue with the radio setup.
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@ -970,7 +970,7 @@ The SMS, which was encoded by the SMS layer, is delivered using DMS frames.
After sending all DMS frames, the call is released toward the mobile station.
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@ -86,8 +86,9 @@ This is highly recommended for the C-Netz, because signaling is done by sifting
<p>
In order to keep RF emission low, use a dummy load for lab test.
Use two separated antennas for outside use of the mobile phone.
Connect one dummy load to the transmitter and another one to the mobile phone's antenna connector.
Alternatively use two separated antennas for outdoor use of the receiver and transmitter, to avoid using a duplexer unit.
Also use antanna on the mobile phone to move further away from the base station.
</p>
<center><img src="dummyload.jpg"/></center>
@ -161,7 +162,7 @@ If your phone has built in antenna and cannot be connected to a dummy load (C-Ne
<center><img src="b-netz-display.jpg"/></center>
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@ -277,7 +277,7 @@ It can be used to check a headset.
Everything that is spoken into the microphone should appear on the headphone.
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