4 ms·
That's why the osmo-fl2k page has the following text: "Before transmitting any signals with an FL2000 device, it is strongly suggested that you check the resul
by mathgenius 9y ago
That's why the osmo-fl2k page has the following text:
"Before transmitting any signals with an FL2000 device, it is strongly suggested that you check the resulting spectrum with a spectrum analyzer, and apply proper filtering to suppress any but the desired transmit frequency.
Operating a transmitter with the unfiltered FL2000 DAC output attached to an antenna outside a RF shielding chamber is dangerous. Don't do it!"
- quickthrower2 9y agoDangerous? Are we talking RF burns here?
- tomfanning 9y agoAs in potentially disruptive to critical-to-life public safety systems, e.g. air traffic control, emergency services communications, I suppose. Square waves = theoretically infinite harmonics at positive multiples of the fundamental frequency (in practice reducing with order of the harmonic) Then there's in-band spurs / spurious emissions, different from harmonics.
- ddalex 9y agoI think we're talking jail time here.
- apcragg 8y agoA radio amature most likely can't construct a bandpass filter with a high enough Q to filter out all of the spurs while still getting a usable signal. Releasing a tool like this and handwaving away interfearence concerns with an abstract refrence to 'proper filtering' is still iresponsible.