> Sent from my iPad > > -Scott > >> On Dec 23, 2015, at 1:11 AM, Cinaed Simson <[email protected]> wrote: >> >> Hi - what parameters would I need for NBFM transmit to ensure the >> channel bandwidth on HackRF One is 15 kHz? > > You would need to limit max deviation to 4kHz. See: > > http://www.n6nmz.net/sharkk/nbfmmath.htm > >> Is Tau the transmission error? And for Tau = 75u is this equal to 75 Hz? > > No, tau is the time constant (in microseconds) of the pre-emphasis audio > filter. See discussion here: > > http://www.dspconcepts.com/sites/default/files/Modules/BasicAudioFloat32/Doc/EmphasisFilter.html > >> In the example I copied, the Max Deviation was was set to 5k - would >> setting Max Deviation to 4k be enough? > > Yes -- see above. > >> Any help would be appreciated. >> >> -- Cinaed >> _______________________________________________ >> HackRF-dev mailing list >> [email protected] >> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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