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From: | Jonathan Shan |
Subject: | Re: [Discuss-gnuradio] Sampling Freq |
Date: | Thu, 22 Mar 2007 17:11:30 -0400 (EDT) |
On Thu, 22 Mar 2007, Johnathan Corgan wrote:
Jonathan Shan wrote:When I send this to file_sink, I see correctly 16 samples from peak to peak. However, when I transmit this using 'usrp sink' and receive at the other end, I see about 32 samples from peak to peak.. double what I expected. What is happening?What do you have the transmitter interpolation and receiver decimation set to?
interp_rate = 64, decim_rate = 16. I saw the formulas usb_sample_rate1 = 64e6 / decim_rate usb_sample_rate2 = 128e6 / interp_rate Using current values, usb_rate1 = 2 * usb_rate2. I'm assuming.. to get the correct sampling freq, usb_sample_rate at both ends should be same? Jonathan Shan
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