Re: [Discuss-gnuradio] trouble with gr_multiply_const_ff

Hi Marcus,

Thanks for your attention.
I have upload a bigger size image below. the x axis is sampling point which
reflects time and the y axis is margin which reflects the power.
I plot the image from the rx block of the gen2_reader project. The signal is
transmitted by the tx block of gen2_reader.
The to_complex block is use to trasfer the float data to complex data for
transmitting by tx block.

The input data of gr_multiply_const_ff block are the same, they come from
the reader block.
It's weird that the output data of gr_multiply_const_ff are the same in
matlab image with different amplitude(bigger than 40 or not) but the signal
tx block transmiting are not.

I can't figure out how the amplitude in gr_multiply_const_ff block influence
the signal in tx block without change the output data.
By the way, we use a gen2_monitor with another usrp to get signal
transmitted from the gen2_reader tx blcok, it has the same signal image to
the rx block of gen2_reader. So, we can assume that there is no problem with
our equipments

Lee




<http://gnuradio.4.n7.nabble.com/file/n45025/amp5000.png>



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