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From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] How to minimize Spillage of energy in neighboring frequencies while transmission |
Date: | Wed, 21 Oct 2015 12:18:36 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 |
Hi Abhinav, which USRP are you using? I'm pretty sure none of our devices supports a 2kS/s sampling rate -- it's just far too low to get directly interpolated to a "usable" DAC/ADC rate. Especially those USRPs that can be equipped with RF frontends (daughterboards) that can operate at near-baseband (400kHz) shouldn't be able to work at such low rates. So: which daughterboard are you using? Hence, UHD should have told you that you can't use that sampling rate, and a higher sampling rate was automatically selected, inherently frequency-"stretching" the signal by the ratio of (actual rate/2kHz). You should heed Sylvain's advice. Just oversample your signal by using an interpolating FIR filter to something that the USRP can happily work with. Best regards, Marcus On 21.10.2015 08:49, abhinav narain
wrote:
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