On 06/10/2019 01:51 PM, J Subash via USRP-users wrote:
Hi,
I am recording a 20MHz wide signal centred at 370MHz.
Attached is an averaged frequency spectrum, and there is a 6dB dip at
the centre of the spectrum. Is there a obvious reason for this. I am
using the python API and a B200 for doing this.
Is there any way to avoid this from happening?
Thanks
BW
JS
How do you know that your signal doesn't have this dip?
Use of a good flt noise source allows you to differentiate between the
case of your signal, and the receiver.
There is DC-offset removal in the signal chain, so if you aren't using
offset tuning, you can see some amount of "over-correction" for the
DC-offset,
leading to a dip in the response, although it's usually fairly small.
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