Re:GNU Radio
by wdfx on Saturday January 15, 2022 @01:15PM
(#29948741)
How can the DVB-T signal bandwidth be larger than what the 'dtv' receiver is capable of if that device was actually originally designed to receive exactly that class of signal?
[ Parent
| on HN ]
The 2.8 MHz limitation comes from shipping raw RF samples off the device over USB 2. When operating as a DVB-T receiver the device decodes the signals before sending them over USB so it uses less bandwidth.
The device was originally intended only as a dtv receiver and not a general purpose software defined radio. The hobbyist/ hacker community discovered the hidden debug mode that allows raw data acquisition and wrote drivers for it.