[USRP-users] Connecting a test signal source to the SBX's RX2

mleech at ripnet.com mleech at ripnet.com
Tue Jun 12 11:10:10 EDT 2012


 

On 12 Jun 2012 11:06, Ryan Connelly wrote: 

> I did the connection
and no smoke came out.. Good!
> 
> An FFT plot centered at the carrier
frequency shows that the signal
> does not exceed -25dBm so I don't
think it is stressing the SBX board
> too much. I agree with you though,
I wouldn't want to go much higher
> than that.
> 
> On Tue, Jun 12, 2012
at 9:25 AM, <mleech at ripnet.com> wrote:
> 
>> On 12 Jun 2012 09:15, Ryan
Connelly wrote: Is there any possibility of damaging the SBX board if I
connect a test signal source directly to the SBX? I want to connect from
a 50 ohm SMA connector that produces a signal source (1200MHz carrier)
at -20dBm nominal power directly to the SMA connector on the SBX for
RX2. I can't find any specs for the SBX max receive power.. Does anyone
have any links? Thanks R _______________________________________________
USRP-users mailing list USRP-users at lists.ettus.com [1]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com [2]
-20dBm should be fine, but I wouldn't go any higher than that.
_______________________________________________ USRP-users mailing list
USRP-users at lists.ettus.com [3]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com [4]
>

> _______________________________________________
> USRP-users mailing
list
> USRP-users at lists.ettus.com
>
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

Keep
in mind that the Gnu Radio FFT isn't calibrated in any way--the dB
numbers given are relative. If absolute power indications are important,
you'll need to calibrate them yourself at various frequencies. 




Links:
------
[1] mailto:USRP-users at lists.ettus.com
[2]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
[3]
mailto:USRP-users at lists.ettus.com
[4]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20120612/02efdc86/attachment-0002.html>


More information about the USRP-users mailing list