|
From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] signal level |
Date: | Thu, 05 Jun 2014 10:09:08 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 |
Hi Ali, >power is very less... Of course, since power is proportional to amplitude squared. Obviously, if you try to drive an DAC with more than it's maximum amplitude, you will get clipping. This is a nonlinear thing and has very bad effects on your spectrum, and that's why you usually avoid it. Greetings, On 05.06.2014 10:01, jason sam wrote:
What will happen if i exceed this limit?Actually with this amplitude the TX power is very less...Is there any other solution? On Thu, Jun 5, 2014 at 12:54 PM, Martin Braun <address@hidden> wrote:On 05.06.2014 05:17, jason sam wrote:Hi Tom, Can you tell what is the constraint for USRP B210?Stay *well* within +/-1. MOn Thu, Jun 5, 2014 at 8:13 AM, Tom McDermott <address@hidden <mailto:address@hidden>> wrote: Hi Ali - some sinks care about the amplitude, and others do not. For example, the instruments built into gnuradio (Scope, Frequency display, etc.) can examine a signal of almost any amplitude within floating-point range because you can adjust the display scale factor. However other sinks, such as a physical transmitter (USRP, HPSDR, etc.) are constrained in the amplitude that they can accept. Normally this must be less than one, and hitting or exceeding 1.00 (even just on the peak) can cause problems. Also a physical transmitter might have only 12 or 16 bits fixed point dynamic range, so there may be a minimum signal amplitude as well. -- Tom, N5EG On Wed, Jun 4, 2014 at 7:33 PM, jason sam <address@hidden <mailto:address@hidden>> wrote: Hi, In GRC is it necessary that we give a signal to any sink having an amplitude greater than 1? Regards, Ali _______________________________________________ Discuss-gnuradio mailing list address@hidden <mailto:address@hidden> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list address@hidden https://lists.gnu.org/mailman/listinfo/discuss-gnuradio_______________________________________________ Discuss-gnuradio mailing list address@hidden https://lists.gnu.org/mailman/listinfo/discuss-gnuradio |
[Prev in Thread] | Current Thread | [Next in Thread] |