Timeline for Practicality of SDR-based TX/RX
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 15, 2020 at 14:27 | comment | added | Marcus Müller | absolutely, rclocher3, but that's why I wrote "many". But you really don't need a great amount of selectable filters to suppress the remaining harmonics. So, when wondering whether to build something with fantastic analog circuitry, or something that involves a good digital side, mediocre analog circuitry, and a low-effort selectable bandpass filter for the same quality: you still get better quality-per-buck when going digital :) | |
| Jun 15, 2020 at 14:21 | comment | added | rclocher3 | Many HF ham antennas are multi-band antennas that work over multiple octaves. | |
| Jun 10, 2020 at 22:18 | comment | added | Marcus Müller | Hm, depends on the amplifier. In fact, if you have a somewhat sensible system that is at least "band"-preselective (e.g. an antenna that simply doesn't work over multiple octaves), then OOB radiation can pretty effectively be countered with digital predistortion. | |
| Jun 10, 2020 at 17:35 | comment | added | rclocher3 | @MarcusMüller quite possibly! But don't typical 100 W ham transmitters need bandpass filters to handle harmonics and phase noise generated or made worse by the final amplifier stage? | |
| Jun 10, 2020 at 17:30 | comment | added | Marcus Müller | I think you're underestimating the applicability and maturity of SDR: Just because your filtering happens in software doesn't mean it's any worse! | |
| Jun 10, 2020 at 15:18 | history | answered | rclocher3 | CC BY-SA 4.0 |