-----Original Message-----
From: discuss-gnuradio-bounces+kresimir.dabcevic=fer...@gnu.org on behalf of
Josh Blum
Sent: Sat 6/4/2011 8:04 PM
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] measuring RSSI - N210 with RFX2400
>
> There is an "rssi" sensor:
> http://www.ettus.com/uhd_docs/manual/html/dboards.html#rfx-series
>
> from the uhd api:
> usrp->get_rx_sensor("rssi")
>
> or in python w/ gr-uhd
> usrp.get_dboard_sensor("rssi")
>
> -josh
>
Thanks for the answer Josh.
As for the analog RSSI, I am quite confused because calling
self.u.get_dboard_sensor("rssi")
from the top block (right after defining "u" as uhd usrp source) is giving me a
value around
6 dBm, regardless of whether I am transmitting a signal or not. Also, when I
call
self.u.get_dboard_sensor("rssi") again immediately after that, new "RSSI" is
about 2-3 dB
higher - what happens here?
When I tried:
global tb
tb = oqpsk_rx_graph(options, rx_callback)
where oqpsk_rx_graph is the class in which gr.top_block is initialized, and
rx_callback
subprogram which is executed when (OQPSK modulated) package is received, and
then within
rx_callback calling:
tb.u.get_dboard_sensor("rssi"),
the sensor says the RSSI is always either 17.033812 dBm or 17.108199 dBm,
regardless of my TX
power or RX gain - what am I doing wrong here?
Also, is there a possibility to somehow measure RSSI with analog sensor at the
exact same moment
when we are receiving package - I am aware that with the above command I am
calling the function
after the package was received (so measuring RSSI doesn't make sense, even
though it should still
differ from the two values I am getting)?...
Regards,
Kresimir Dabcevic
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