[Discuss-gnuradio] Sampling rate of USRP and data rate through USB

[Lin Ji]

Hi,

  There is one thing that I can not figure out:

  The ADC on the USRP has a sampling rate at 64Msps, that is, for a data at 1Mbps, for every incoming bit there will be 64 samples. Suppose every sample is 16bits, the bit rate is 1024Mbps,that is a huge amount of data flow. Now if a user want to same these samples to file through USB, even though the USB 2.0 interface has a high throughput at 480Mbps, it's not enough. If there is a buffer(like a FIFO or something) that is handling the ADC to USB tranfer, sooner or later this buffer will get full, how is this situation been handled?

  Thanks.

/Lin