Hi Nirmala,
On 22.10.2017 18:22, Nirmala Soundararajan via USRP-users wrote:
> Hi Marcus,
>
> I have no idea why you said that but I certainly did not mean to
> directly take the values that Marcus L mentioned and straight away add
> it in my report!. Since I am just learning about SDR, I just wan
Hi Marcus,
I have no idea why you said that but I certainly did not mean to directly
take the values that Marcus L mentioned and straight away add it in my
report!. Since I am just learning about SDR, I just wanted an idea of what
could be the minimum power levels that an SDR receiver can fairly
c
Niemals,
> The "faintest reasonable signal level" that a typical SDR can process!
> (Typically around -120 to -130 dBm).!
no! You can process much weaker signals, too, given enough processing gain.
Marcus was just giving an example. Whether you can "see" what is in the air
depends on the
Thanks for a very good explanation on power levels Marcus. Actually I think
I got the answer to what I was looking for. The "faintest reasonable signal
level" that a typical SDR can process! (Typically around -120 to -130
dBm).!
In my application, I have a bunch of channels through which I can
On 10/21/2017 11:59 AM, Kevin McGuire via USRP-users wrote:
My knowledge is limited, therefore, read this with a grain of salt.
However, I wanted to try to help and if something I say does not make
sense then double-check it or someone else may come along and correct me.
I had this same proble
My knowledge is limited, therefore, read this with a grain of salt.
However, I wanted to try to help and if something I say does not make sense
then double-check it or someone else may come along and correct me.
I had this same problem when I started with these types of systems. I had
trouble unde
On 10/21/2017 09:20 AM, Marcus Müller via USRP-users wrote:
Hi Nirmala,
I'm confused, so what *calibrated measurement device* did you use to
get "-80 dbm to -100 dbm"? As Marcus L has pointed out, the values you
get from the USRP are *not* relative to a physical unit.
Please simply don't th
Hi Nirmala,
I'm confused, so what *calibrated measurement device* did you use to get
"-80 dbm to -100 dbm"? As Marcus L has pointed out, the values you get
from the USRP are *not* relative to a physical unit.
Please simply don't think the plots that *any* software gives you have
something to do w
On 10/18/2017 01:47 PM, Nirmala Soundararajan via USRP-users wrote:
Yeah got it! But don't you think the tool has those capabilities to
consider the entire chain and then display the output? Since I don't
have actual spectrum analyzer in the lab I am forced to use the
software spectrum analyz
Hi Konstantin and Mike,
In fact I started with 0 gains for both transmitter and receiver with
different amplitudes of input signal. The received power is always in the
range of -80 dbm to -100 dbm.
I am not sure how to say that a certain received power (in dbm) 'is
acceptable' when given an input
Yeah got it! But don't you think the tool has those capabilities to
consider the entire chain and then display the output? Since I don't have
actual spectrum analyzer in the lab I am forced to use the software
spectrum analyzer.
The initial phase is to first confirm that the transmit and receive
0dBm is the maximum power that is recommended to prevent damage to the
hardware. But the actual response of the entire signal processing
chain, including variable-gain elements, the ADCs, and such, cannot
simply be "modeled" in such a simple manner.
In order to map the digital-domain results bac
Hi Marcus,
I made a simple model using Matlab Simulink and used spectrum analyser
block to observe the transmitted and received waveform. Since 0 dbm was
the maximum input power, I just calculated (input volatge)^2 / 2. It comes
to 0.045V. I specified block parameters and gave different values.
Also note that at 0 dBm, you're at the maximum safe input power, so your
received signal might be saturated.
--Neel Pandeya
On Oct 17, 2017 22:30, "Marcus D. Leech via USRP-users" <
usrp-users@lists.ettus.com> wrote:
On 10/18/2017 12:08 AM, Nirmala Soundararajan via USRP-users wrote:
> Hi all,
On 10/18/2017 12:08 AM, Nirmala Soundararajan via USRP-users wrote:
Hi all,
I am trying to transmit and receive a simple 10 kHz tone using a
single USRP B205mini-i. The input power is 0 dbm ( The amplitude of
10kHz tone being 45mV). The transmitting and receiver antenna are same
omnidirection
Hi all,
I am trying to transmit and receive a simple 10 kHz tone using a single
USRP B205mini-i. The input power is 0 dbm ( The amplitude of 10kHz tone
being 45mV). The transmitting and receiver antenna are same omnidirectional
type each having 3 dbi gain. I set the transmitter gain as 8 and recei
16 matches
Mail list logo
