Re: unexplained received power fluctuations with usrp b210 and gnuradio

2022-04-20 Thread Marcus D. Leech
On 2022-04-20 08:20, Christophe Marqué wrote: Hi, I'm not sure this is the right place to ask this question, but I will try anyway. I am using a usrp b210 to simply record the received power at a certain frequency. The receiver is plugged to a bicone antenna and an amplifier for testing, but

Re: Problems with OOT C++ fft

2022-04-20 Thread George Edwards
Hello GNURadio Community, Please ignore the above problem, I figured it out. George On Sun, Apr 17, 2022 at 5:16 PM George Edwards wrote: > Dear Gnuradio Community, > > I am writing an OOT signal processing algorithm in C++ that requires both > fft and ifft. I use the Gnuradio C++ library to g

How pass an input vector in an OOT QA test?

2022-04-20 Thread George Edwards
Hello GNURadio Community, In an OOT QA testing of a signal processing block designed to accept an input vector of 4 elements, I am having problems passing the QA input as a vector. It sees the input as a stream. I tried passing the data in two ways, but each failed. Here are the two ways I have fo

Meaning of value in noutput_items for an OOT with vector input

2022-04-20 Thread George Edwards
Hello GNURadio Community, I have written a C++ OOT "sync" block with vector input and vector output (data type float). I wrote a line in my program to print the value of noutput_items on each GRC flow graph iteration and it alternately prints the values 15 and 16. This is surprising!!! I was expec

Re: Meaning of value in noutput_items for an OOT with vector input

2022-04-20 Thread Jeff Long
The item size is vlen * sizeof (type), so you are seeing 16 * 512 "samples". On Wed, Apr 20, 2022 at 1:44 PM George Edwards wrote: > Hello GNURadio Community, > > I have written a C++ OOT "sync" block with vector input and vector output > (data type float). I wrote a line in my program to print