Re: [USRP-users] Input power limit for B2x0 series

2017-07-09 Thread Marcus Müller via USRP-users
Hi Sivan, to add to what Dan already said: You're right, the -15 dBm limit is a bit overzealous (though I really must stress it's better to be safe than sorry on that side). We're actually in the process of relaxing the limits we're stating for this; compare [1], where we already spec a maximum i

Re: [USRP-users] Input power limit for B2x0 series

2017-07-09 Thread Sivan Toledo via USRP-users
Thanks Marcus! The 0dBm limit is much easier to work with than the -15. I indeed can add a 3 or 6dB attenuator to ensure that this is the case. Thanks a lot for the clarification regarding U800 and U813. I don't mind sharing the frequency band and the details of the receive chain. We operate at

Re: [USRP-users] Input power limit for B2x0 series

2017-07-09 Thread Marcus Müller via USRP-users
Hi Sivan, ah in that case, you'll probably be fine; NF would be (assuming all the limiter, the filter and a potential attenuator have a 0dB Noise Figure): $F_\text{total} = F_\text{LNA} + \frac{F_\text{AD936x}}{G_\text{LNA}G_\text{cable}G_\text{limiter}G_\text{filter}G_\text{attenuator}}$; The N

Re: [USRP-users] Input power limit for B2x0 series

2017-07-09 Thread Dan CaJacob via USRP-users
If your LNA is pumping out at 1/4W, just add an attenuator inline near your radio to bring your signal power down to safe levels - it won't hurt you in any appreciable way since you've got a nice LNA upfront already. On Sun, Jul 9, 2017 at 7:03 AM Marcus Müller via USRP-users < usrp-users@lists.et