DBSRX Lo Frequency

GNU Radio
1

Is there a missing class for the DBSRX daughterboard not include in the
CVS repository? There seems to be no way to command the LO frequency
tuning word of the MAX2118 downcoverter chip.

2

Gregory W Heckler wrote:

Is there a missing class for the DBSRX daughterboard not include in
the CVS repository? There seems to be no way to command the LO
frequency tuning word of the MAX2118 downcoverter chip.

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Use the ‘tune’ method:

r = usrp.tune(self.u, 0, self.subdev, target_freq)

This is from my code in
gr_radio_astronomy/src/python/usrp_ra_receiver.py

3

I guess this implies there is no C++ native DBSRX support at this time?
Does there exist an ICD to the DBSRX daughterboard that I could write a
C++ driver to?

-Heckler

4

On Thu, Feb 01, 2007 at 02:35:35PM -0500, Gregory W Heckler wrote:

I guess this implies there is no C++ native DBSRX support at this time?

This is correct. It’s on the list of things to do, ticket:127.
http://gnuradio.org/trac/ticket/127

Does there exist an ICD to the DBSRX daughterboard that I could write a
C++ driver to?

Look at the python code in gr-usrp/src/db_dbs_rx.py and the schematics.

http://gnuradio.org/trac/browser/usrp-hw/trunk/dbsrx/dbsrx.ps?format=raw

Eric