williamp/osmocom-analog
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

work on docs

Browse Source
This commit is contained in:
Andreas Eversberg
2017-10-03 10:48:50 +02:00
parent 91b48c09de
commit 7cbebaeb75
12 changed files with 95 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
docs/software.html
View File

@@ -277,6 +277,63 @@ It can be used to check a headset.
Everything that is spoken into the microphone should appear on the headphone.
</p>
<p class="toppic">
On-screen displays
</p>
<center><img src="display-wave.png"/></center>
<p>
Essentially for monitoring the input level is the 'w' key.
You will get an ASCII art plot of received audio signal.
Press 'w' again to turn off this view.
</p>
<center><img src="display-measurements.png"/></center>
<p>
To check measurements like input level and quality, press the 'm' key.
You will get an ASCII art plot of differen bar graphs.
They show tone / frame level and quality.
The green bar shows the current level.
The yellow marker shows the last/peak/average level.
The light blue marker shows the target level.
Some measurement like RF level, frequency offset and peak deviation are only available with SDR.
Press 'm' again to turn off this view.
</p>
<center><img src="display-iq.png"/></center>
<p>
Only works with SDR:
You can monitor IQ data by pressing 'q' key.
You will get an ASCII art plot of received IQ data.
Press 'q' again and you will get a logarithmic view of IQ vectors.
Press 'q' again to turn off this view.
Please monitor this view when the phone tries to call or register.
If the dots are yellow, or red, the received signal may overdrive the ADC.
Especially when the linear view shows a deformed circle (or even rectangle), reduce RX level.
</p>
<center><img src="display-spectrum.png"/></center>
<p>
Only works with SDR:
Press 's' to get an ASCII art graph of received frequency spectrum.
The spectrum's bandwidth is defined by the sample rate (-s) and not by the SDR sample rate!
If you don't get nice peaks, but maybe several peaks, you might over-driven the input.
Note that the peak will spread by the frequency deviation, so the peak might look noisy on the top.
If the peak is quite low, check the input gain.
Press 's' again to turn off this view.
</p>
<center><img src="display-status.png"/></center>
<p>
Current transceiver and call state can be viewed by pressing 'c' key.
Press 'c' again to turn off this view.
</p>
<hr><center>[<a href="index.html">Back to main page</a>]</center><hr>
</td></tr></table></center>
</body>