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

Ryan Connelly ryan.connelly.6742 at gmail.com
Tue Jun 12 11:26:08 EDT 2012


Oh yes of course what was I thinking.. The FFT is not even plotting
w.r.t. power. But the zero must be some reference value? Are you just
saying that the reference is not accurate and varies with frequency?

On Tue, Jun 12, 2012 at 11:10 AM,  <mleech at ripnet.com> wrote:
> 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
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> should be fine, but I wouldn't go any higher than that.
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> 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.
>
>
>
>
>
>
>
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