Just to follow on. The BasicRx is +10 dBm. I've been using that as a max to the BasicRx for quite a while without issue. But the UBX-160 knowledge base indicates -15 dBm. I'd assume if you're using the UBX that you'll be using the configurable on-board amplification (up to 31.5 dB).
https://kb.ettus.com/UBX On Mon, Mar 31, 2025, 8:59 AM Marcus D. Leech <patchvonbr...@gmail.com> wrote: > On 31/03/2025 11:51, zhou via USRP-users wrote: > > Hi, > > What is the max input signal power to RF ports in X310? There is a spec > in the below link: > > https://www.ettus.com/wp-content/uploads/2024/01/X300_X310_Spec_Sheet_2024-01-23.pdf > There are max output powers, but not input power. > I am using UBX-160 daughterboard. > > In https://kb.ettus.com/X300/X310_Getting_Started_Guides, it says that > "Never apply more than -15 dBm of power into any RF input." > > ChatGpt says that "*UBX 40*: *+10 dBm* (10 mW)" > > What is the max input signal power? > > Thanks for any comments, > > Zhou > > -15dBm is somewhat conservative, but if that's what the manufacturer > recommends, I'd go with that, rather than a > hallucination produced by ChatGPT. > > The receivers on USRPs are generally designed to be connected to an > antenna, and as such have sensitive, lower-noise > front-ends. Such front-ends generally don't tolerate higher input > powers without damage--and +10dBm *IS* high > input power for a radio receiver. > > One may have gotten used to the relatively-insensitive inputs of > laboratory spectrum analyzers, which often have > inputs that can tolerate considerably-higher power levels, but are > insensitive at levels expected from direct > connection to an antenna. But USRPs are designed for antenna > connection. If you want to use them as > a laboratory spectrum analyser, you'll need to use attenuators. > > > > > > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-le...@lists.ettus.com > > > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-le...@lists.ettus.com >
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