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Tech Head - The Technology Section
SDR radio, Software Defined Radio
How to Calculate the offset value of your dongle
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<blockquote data-quote="Archive-8" data-source="post: 992688"><p>windows download</p><p></p><p><a href="http://rtlsdr.org/files/kalibrate-win-release.zip" target="_blank">http://rtlsdr.org/files/kalibrate-win-release.zip</a></p><p></p><p>unzip, rename to: kalibrate, and move the folder to your c drive.</p><p></p><p>enter the kalibrate folder. and copy the files from the sub directory,to the parent directory.</p><p></p><p>run cmd from the start bar.</p><p></p><p>paste this line in to cmd, C:\Kalibrate\kal.exe -g 42 -e 22 -s 900 this makes it scan the gsm signal in your area.</p><p>[ATTACH=full]99802[/ATTACH]</p><p></p><p>once it has finished scanning, look for the channel number, that is the strongest for your area, in my case it was channel 115.</p><p></p><p>paste this line C:\Kalibrate\kal.exe -e 41 -c 115 -v in to cmd screen, changing the channel number to match the strongest in your area.</p><p></p><p>[ATTACH=full]99803[/ATTACH]</p><p></p><p>once it has run, it will show at the bottom of the page, average absolute error: 61.802PPM for my cheap dongle</p></blockquote><p></p>
[QUOTE="Archive-8, post: 992688"] windows download [URL]http://rtlsdr.org/files/kalibrate-win-release.zip[/URL] unzip, rename to: kalibrate, and move the folder to your c drive. enter the kalibrate folder. and copy the files from the sub directory,to the parent directory. run cmd from the start bar. paste this line in to cmd, C:\Kalibrate\kal.exe -g 42 -e 22 -s 900 this makes it scan the gsm signal in your area. [ATTACH=full]99802[/ATTACH] once it has finished scanning, look for the channel number, that is the strongest for your area, in my case it was channel 115. paste this line C:\Kalibrate\kal.exe -e 41 -c 115 -v in to cmd screen, changing the channel number to match the strongest in your area. [ATTACH=full]99803[/ATTACH] once it has run, it will show at the bottom of the page, average absolute error: 61.802PPM for my cheap dongle [/QUOTE]
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How to Calculate the offset value of your dongle
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