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

From: Lin Ji
Subject: [Discuss-gnuradio] Sampling rate of USRP and data rate through USB
Date: Mon, 6 Nov 2006 13:40:21 +0100

  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?

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