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Today's Topics:
1. NI USRP (Usrp IITM)
2. Re: NI USRP (Matt Ettus)
3. Re: BasicRX 50 Msps mode (Josh Blum)
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Message: 1
Date: Fri, 18 Jan 2013 12:34:17 +0530
From: Usrp IITM <[email protected]>
To: [email protected]
Subject: [USRP-users] NI USRP
Message-ID:
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Hi,
Is NI USRP N2921 the same as ETTUS N210 with an appropriate daughter board?
Regards
RK
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Message: 2
Date: Thu, 17 Jan 2013 23:34:19 -0800
From: Matt Ettus <[email protected]>
To: Usrp IITM <[email protected]>
Cc: "[email protected]" <[email protected]>
Subject: Re: [USRP-users] NI USRP
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The NI USRP N2921 is the same as an N210 with XCVR2450, but also includes
the following:
-0.3 m SMA-SMA Loop Back cable
-30 dB SMA inline attenuator
-NI-USRP software driver
-LabVIEW Modulation Toolkit
-LabVIEW MathScript RT Module
-LabVIEW Digital Filter Design Toolkit
Matt
On Thu, Jan 17, 2013 at 11:04 PM, Usrp IITM <[email protected]>wrote:
> Hi,
>
> Is NI USRP N2921 the same as ETTUS N210 with an appropriate daughter board?
>
> Regards
> RK
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
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Message: 3
Date: Fri, 18 Jan 2013 01:53:41 -0600
From: Josh Blum <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] BasicRX 50 Msps mode
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1
On 01/17/2013 09:21 AM, David Campbell wrote:
> All,
> Here's my config for the n210 with BasicRX
>
> Freq (tone) in: 20 MHz
> n210 decimation: 2
> n210 tune freq: 25 MHz
> n210 bits/sample: 8
> (therefore, data is 50 Msps 8-bit complex)
>
>
> With this config, my tones appear at +5 and -5 MHz (equal levels) out.
> I would expect a tone just at -5 MHz.
>
> If I just change the n210 decimation to 4, then I just get the strong
> tone at -5 MHz, as I would expect.
>
>
I think I agree that it not expected, so I will try to replicate this.
The DDC chain has a cordic, then halfband filters. I would expect the
cordic to shift down the tone to -5 and -45. The first halfband (decim
2) should knock out the -45MHz tone.
-josh
>
> Thanks,
> David
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End of USRP-users Digest, Vol 29, Issue 18
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