My name is VIvian and I am working with GMSK modulation. I have a little
doubt about it.
I am transmitting a cosine signal using UHD sink and source blocks,
daughter board RFX 2400. The spectrum that I transmit is the one that
can see in the attached files.
I use a network analyzer to see the real spectrum that I am sending and
spectrum that I obtain can be seen in the other photo that I attach.
Finally I look the spectrum received in GNU Radio, which is attached to
this email too.
I found that the spectrum that I send is the half of the size that I see
the network analyzer. I mean the spectrum that I send has a bandwidth of
200 KHz ( I see this in GNU Radio) but the one that I obtain looking at
the network analyzer is approx. 400 KHz. When i see the received signal
GNU Radio is perfect, its bandwidth is the same that I send ( 200 KHz).
dont know why I see a different bandwidth in the network analyzer.
knows what is happening?
I would appreciate any help you can give me. Thanks in advance.