4 ms·
Over what frequency range can the dongle be tuned? What is its useful bandwidth, and is it limited by the radio/sampler or the USB interface? Also, what sort
by femto 14y ago
Over what frequency range can the dongle be tuned? What is its useful bandwidth, and is it limited by the radio/sampler or the USB interface? Also, what sort of sensitivity/noise figure do you get? Any comments on inter-modulation performance?
Lots of questions, but I'm curious as to how these receivers compare to a more traditional rig, and where the limits of performance lie.
- keenerd 14y agoThe tuning range depends on the hardware. See the first table at http://sdr.osmocom.org/trac/wiki/rtl-sdr http://sdr.osmocom.org/trac/wiki/rtl-sdr for details. All have 2.8MHz bandwidth. A (relatively) simple hardware mod lets you bypass the tuner and pick up 0Hz to 28MHz. Noise and sensitivity vary. I know at least one person ran a bunch of tests with a spectrum analyzer. (Can't find that link though.) Performance generally seems to be limited by the poor shielding/filtering and the low quality timing crystal. If you fix the worst flaws, they are rather capable. For example, they've been used for GPS and radio astronomy. Biggest differences with a more traditional setup is the lack of a transmitter and the questionable build quality.