On Sun, Jul 22, 2012 at 10:51 PM, Thomas Tsou thomastsou@gmail.com wrote:
On Sun, Jul 22, 2012 at 12:59 AM, Alexander Chemeris alexander.chemeris@gmail.com wrote:
On Sun, Jul 22, 2012 at 6:40 AM, Thomas Tsou thomastsou@gmail.com wrote:
On Sat, Jul 21, 2012 at 5:57 PM, Alexander Chemeris alexander.chemeris@gmail.com wrote:
I've started documenting this at the wiki: http://code.google.com/p/umtrx/wiki/LMS6002DCalibration#Tx_I/Q_balance_calib... 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?
Thanks for the measurements. At the end we should be below that at all GSM bands. For now it's fine to be close.
I also noticed that your frequency is far off - could you calibrate it and make pictures of the best and worst case in the 900 band?
And just to be sure - could you check what TCXO do you have on the UmTRX? It should be TCD4029-26.0M, probably marked like PLEU4030Z.