[USRP-users] Conformation Of Maximum Ratings N200, LFRX And Full Scale Deflection ADC

Michael Scott mscott at northernradar.com
Thu Apr 2 13:20:32 EDT 2015


Thank You All.  It’s not just coming LFTX were trying to figure out about forward power from our PA we are going to need to achieve the strongest signal and maximum SNR.

Mike

From: Matt Ettus 
Sent: Thursday, April 02, 2015 2:39 PM
To: Michael Scott 
Cc: Neel Pandeya ; Ettus Mailing List 
Subject: Re: [USRP-users] Conformation Of Maximum Ratings N200, LFRX And Full Scale Deflection ADC


Full scale on the LFRX is +10dBm if the ADC gain is turned down.  You can turn up the ADC gain, which would reduce the full scale accordingly.  You won't do damage until about +20dBm, but to be safe you should stay below +15dBm.

Matt

On Thu, Apr 2, 2015 at 9:53 AM, Michael Scott via USRP-users <usrp-users at lists.ettus.com> wrote:

  Hi All,



  We are looking at the some of the absolute maximums for the Ettus N200. I have done some reading and the maximum power for the LFRX is 10 dBm this is 2 V P-P. I believe it can handle 3.3 V P-P. But they use this spec because the most the ADC can handle without damage 2 V P-P. We are using the LFRX D'Card this has no gain on the frontend. Can you confirm this is true?



  The other main question that I have is that we are trying to figure out how much power we can put into are transmitter. So we are wondering what voltage on the ADC gives all bits set to a digital ' 1'? In other words what gives full scale deflection of the ADC.



  Mike 


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