[USRP-users] USRP N210 low pass filter

Marc Bauduin baudu1marc at gmail.com
Tue Apr 30 03:23:00 EDT 2013


I used an odd decimation factor, so the filter I observe should be the CIC
filter. I will check with  an even decimation factor.

Thanks for your help


2013/4/29 Matt Ettus <matt at ettus.com>

>
> If you choose an odd decimation ratio, you will have rolloff due to the
> CIC filters.  You need to choose an even decimation ratio to get a flat
> passband.
>
> Matt
>
>
> On Mon, Apr 29, 2013 at 12:21 AM, Marc Bauduin <baudu1marc at gmail.com>wrote:
>
>>
>> Hy everyone,
>>
>> I have 2 USRP N210 with a daughterbourd RFX2400 and I pilot them with
>> Matlab. When I make a narrowband communication, I don't observe a flat
>> channel but I also observe the spectrum of a filter. I searched in
>> documentation but I did'nt see the characteristic of the baseband filter of
>> the system. What are the characteristic of this filter? Is it a RRC filter?
>>
>> Thanks for your answer,
>> Marc
>>
>> _______________________________________________
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>> USRP-users at lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>>
>
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