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Today's Topics:
1. Re: Pre-cog (manjusha)
2. Re: Transmit and receive bits (manjusha)
3. Re: Transmit and receive bits (manjusha)
4. Re: Setting external reference for subsequent programs (Josh Blum)
5. Spurious from TVRX2 when 1.7MHz bandwidth selected
(LEMENAGER Claude)
----------------------------------------------------------------------
Message: 1
Date: Tue, 5 Mar 2013 22:30:51 +0000 (UTC)
From: manjusha <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] Pre-cog
Message-ID: <[email protected]>
Content-Type: text/plain; charset=us-ascii
manjusha <yandamuri.manju@...> writes:
>
> That means i don't have to construct "Top Layer Radio and MAC Implementation
in GRC"??!!
And,what commands do i use in the terminal to run this(Physical Layer
Implementation) grc file since the addresses of the usrp remains same.
Also,i dont see any port numbers assigned in the Physical layer GRC file.Will
usrp still understand what i am asking it to do?!!
Thanks.
> > USRP-users mailing list
> > USRP-users@...
> > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
> >
>
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------------------------------
Message: 2
Date: Tue, 5 Mar 2013 22:42:13 +0000 (UTC)
From: manjusha <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] Transmit and receive bits
Message-ID: <[email protected]>
Content-Type: text/plain; charset=us-ascii
So you mean to say,open two terminals(one to transmit and one to receive) and
run the top_block.py file on both of them?
thanks.
------------------------------
Message: 3
Date: Tue, 5 Mar 2013 22:46:12 +0000 (UTC)
From: manjusha <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] Transmit and receive bits
Message-ID: <[email protected]>
Content-Type: text/plain; charset=us-ascii
> > ___
Do i have to give some port numbers or addresses when i run the top_block.py
file?____________________________________________
------------------------------
Message: 4
Date: Tue, 05 Mar 2013 17:03:06 -0600
From: Josh Blum <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] Setting external reference for subsequent
programs
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1
On 03/04/2013 11:04 PM, Kevin Rosenberg wrote:
> Hello,
>
> Apologies to the list if this is documented somewhere and I missed it.
> I'd like to configure my N210/B100s to use my house standard 10MHz
> reference (and PPS) in programs such as uhd_siggen_gui that don't
> appear to have the ability to set the clock reference to an external
> source.
>
> Is there a means to configure an N210 or B100 to use an external
> reference for subsequent programs until the device is told to
> use a different clock reference?
There is an API call, but not every example app in gnuradio has command
like hooks to set these.
This will set the device to use the external 10 mhz clock reference in
python: usrp.set_clock_source("external")
-josh
>
> Thanks,
>
> Kevin
>
>
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------------------------------
Message: 5
Date: Wed, 6 Mar 2013 15:46:16 +0100
From: LEMENAGER Claude <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [USRP-users] Spurious from TVRX2 when 1.7MHz bandwidth
selected
Message-ID:
<12914_1362581179_513756bb_12914_1934_2_59957d668d245c4eb38e8f85c054e901075a360...@thsonea01cms09p.one.grp>
Content-Type: text/plain; charset="iso-8859-1"
Hello,
The tested configuration was an USRP N210 with latest firmware and equipped
with TVRX2 and GPSDO locked, set as reference.
Two problems where reported:
1) Spurious from TVRX2 when 1.7MHz bandwidth selected under simple carrier
connected in.
The free available document from NXP for TDA18272HN specify a LIF from
3 to 5MHz. As, if I am right, in UHD the LIF chosen is half the bandwidth, the
LIF is not in the given spec. But the 1.7MHz BW Is in the spec so....
Is it possible to obtain this selectivity without spurious?
NOTE: I try to select manually an offset for the FI but it seem that the BW
filter doesn't shift...., the RSSI is measured aside the acquisition.
No spurious observed for the other bandwidth.
2) When RSSI is measured (in multi threading), we observe that the
streamed data are attenuated by an about 20dB factor (just some samples). Is
it possible to have RSSI without perturbation of the continuously streamed data?
Thanks for this forum,
Claude Lem?nager
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