On 06/04/2011 02:04 PM, Josh Blum wrote:
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")
A disadvantage to the get_rx_sensor("rssi") approach is that only some
of the daughter-boards have that (analog) function, and also,
the RSSI is generally sensed at the bandwidth of the RF input to the
down-converter chip, rather than at your final pre-demodulation
bandwidth. Which can produce results that vary from mildly annoying
to quite startling or even wildly wrong.
Which is why I always just compute the signal strength from the data
stream at my final bandwidth.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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