[time-nuts] Noise Floor

[jimlux]

On 3/24/20 9:26 AM, Anders Wallin wrote:

> Our experience with the Ettus radios is that although they have 2 channels
> there is a lot of cross-talk between rx1 and rx2 channels, which makes a
> diy SDR-based phase-meter challenging.
> 

The early USRPs in particular (I don't have as much experience with the 
new little ones) are really intended for use as an educational tool - 
they don't have particularly high performance in many ways - spurious 
radiated emissions are a big problem (the internal LO leaks and gets 
into the input of your receiver) - cross talk - lack of an easy way to 
time tag data precisely or to have deterministic timing between Tx and Rx.