PHS8: Tone generation | Thales IoT Developer Community
March 27, 2014 - 1:26pm, 4527 views
Hello,
I'm using a PHS8 module in audio mode 1: Standard mode (reference handset).
To be able to test the handset speaker in an environment with no network, I would like to generate a tone directly on the speaker handset.
Is this possible on a PHS8?
I know that on previous modules like MC75i there were some AT commands like "AT^SNFG" for tone genereration.
Thanks a lot.
Regards.
Hi...As per my experience for DTMF to work "properly" the two DTMF frequencies need to have a sinewave characteristic. Also, combining the two appropriate square waves will produce so much noise, that a DTMF detector may not be able to discriminate the actual signal from the noise. The Propeller is fully capable of generating an appropriate signal. Heck, the BS2 is able to do this by generating a pseudo-sine wave with a small RC filter.