RFAnalyzer
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demantz
Frequency limits
Hi I'm using RF Analyzer on my android phone connected to an rtl-sdr hw (usb connection or remote connection), I don't see particular problems all it's fine. I would like to remove the frequency limits about 24MHz. This because using the rtl_tcp server I can set the rtl-sdr in direct sampling mode (this is done in order to tune the HF band); unfortunately the HF tuning are blocked by RF Analyzer when rtl-sdr source is selected. Best regrads, Flavio.
With a RTL-SDR blog v3 or v4 there is capacity to tune down to 500KHz as well. This limit cripples RFAnalyzer!
There will be a new RF Analyzer 2.0 version soon which is almost a complete rewrite of the app. This will have the option to disable all frequency restrictions so that arbitrary tuning for RTL-SDR is possible.
In the meantime, I hacked my way through to the goal: RFAnalyzer-zeroMhz.zip
How I produced this (I suggest you do this yourself instead of installing this APK from a random on the net):
apk-editor-studio (open contents), xarchiver (on unknown/instant-run.zip), https://github.com/mickiemousez/Dex2Jar2Dex/releases/tag/v2.4.6 (on slice_6-classes.dex), xarchiver (on the jar that came out), hexedit (on com/mantz_it/rfanalyzer/RtlsdrSource.class) to change the only instance of 016E3600 to all zeroes, jd-gui to check the result, then right-click "Replace" on RtlsdrSource.class in the xarchiver instance that opened the jar, Dex2jar2dex to get back to a dex from the jar, "Replace" on slice_6-classes.dex in the xarchiver instance that had instant-run.zip open, and finally Save APK in apk-editor-studio.
:D Very cool I like it! It's definitely fun to play around with APKs. If you like, the beta version of the 2.0 version is now online. Have a look at this reddit post with all the infos: https://www.reddit.com/r/RTLSDR/comments/1mjrxcx/reviving_rf_analyzer_beta_testers_wanted_for_the/