On 24/04/2025 16:29, Anil Gurses via USRP-users wrote:
Hi,
It's the peak power input, not average. Anything beyond that level
might damage the RF chain.
A.
THIS.
Most of the Ettus/NI radios are designed for use in an "over the air"
scenario, where signal levels are expected to be low,
and sensitivity is a requirement. This is very different from (for
example) a laboratory spectrum analyzer or radio
protocol analyszer.
In the world of "over the air" signals of -60dBm are actually quite
strong, and it's typically the case that such radios
have a narrow-band MDS of -130 to -140dBm. So, in that context,
anything even approaching -10dBm is
a very very strong signal, and small-signal, low-noise RF gain stages
are generally unhappy with signals that your
laboratory spectrum analyzer would be perfectly happy with. The
"unhappiness" first starts to manifest as
non-linearity, and then moves on to device destruction. The gate
regions in the low-noise transistors are only a
few molecules thick, and in larger electric fields internally, they
just kind of evaporate.
On Thu, Apr 24, 2025 at 4:25 PM temirkarakurum@gmail.com wrote:
I have a quick question regarding the max input power. -15 dBm is
the suggested max power rating for B210. Is this average or peak
power?
If I have a +10dBm peak power signal with a duty cycle of 0.1%
(30dB), thus an average power of -20 dBm, would this mean that I
am safe? Or is there still a chance of damaging the SDR?
Best,
T
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On 24/04/2025 16:29, Anil Gurses via USRP-users wrote:
> Hi,
>
> It's the peak power input, not average. Anything beyond that level
> might damage the RF chain.
>
> A.
THIS.
Most of the Ettus/NI radios are designed for use in an "over the air"
scenario, where signal levels are expected to be low,
and sensitivity is a requirement. This is very different from (for
example) a laboratory spectrum analyzer or radio
protocol analyszer.
In the world of "over the air" signals of -60dBm are actually quite
strong, and it's typically the case that such radios
have a narrow-band MDS of -130 to -140dBm. So, in that context,
anything even approaching -10dBm is
a very very strong signal, and small-signal, low-noise RF gain stages
are generally unhappy with signals that your
laboratory spectrum analyzer would be perfectly happy with. The
"unhappiness" first starts to manifest as
non-linearity, and then moves on to device destruction. The gate
regions in the low-noise transistors are only a
few molecules thick, and in larger electric fields internally, they
just kind of evaporate.
>
> On Thu, Apr 24, 2025 at 4:25 PM <temirkarakurum@gmail.com> wrote:
>
> I have a quick question regarding the max input power. -15 dBm is
> the suggested max power rating for B210. Is this average or peak
> power?
>
> If I have a +10dBm peak power signal with a duty cycle of 0.1%
> (30dB), thus an average power of -20 dBm, would this mean that I
> am safe? Or is there still a chance of damaging the SDR?
>
> Best,
> T
>
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> USRP-users mailing list -- usrp-users@lists.ettus.com
> To unsubscribe send an email to usrp-users-leave@lists.ettus.com
>
>
> _______________________________________________
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