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Thomas Tsou thomastsou at gmail.comOn Sun, Jul 22, 2012 at 12:59 AM, Alexander Chemeris <alexander.chemeris at gmail.com> wrote: > On Sun, Jul 22, 2012 at 6:40 AM, Thomas Tsou <thomastsou at gmail.com> wrote: >> On Sat, Jul 21, 2012 at 5:57 PM, Alexander Chemeris >> <alexander.chemeris at gmail.com> wrote: >>> I've started documenting this at the wiki: >>> http://code.google.com/p/umtrx/wiki/LMS6002DCalibration#Tx_I/Q_balance_calibration >>> Is that a good enough description for you? >> >> Added: >> >> - IQ balance correction >> - Laurent C1 pulse >> >> We are below the target threshold. > > Great achievement! > Is it consistent over the whole 900 band, i.e. is that the worst case? Overall measurements are close (either above or below) to 1.5/5 for the 900 band in general. 945 MHz is currently the best case, but that is the frequency I spent the most time on with calibration. Do we need to be consistently below 1.5/5 or just close? > I guess in 1800 band we're above the threshold yet. Could you measure > by how much we're off there? At 1945 MHz,the best I could do was roughly 2.3/7.2 with IQ balance and LO leakage corrections. I didn't try any 1800 band frequencies. Thomas