On Sun, Jul 22, 2012 at 3:21 PM, Alexander Chemeris alexander.chemeris@gmail.com wrote:
On Sun, Jul 22, 2012 at 10:51 PM, Thomas Tsou thomastsou@gmail.com wrote:
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?
Perhaps this is a silly question, but how do I calibrate the clock? or use an external reference signal?
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.
2600 028 PLEU 4030Z
Thomas