LMS TxLO noise

Thomas Tsou thomastsou at gmail.com
Sun Jul 22 22:17:34 UTC 2012

On Sun, Jul 22, 2012 at 3:21 PM, Alexander Chemeris
<alexander.chemeris at gmail.com> wrote:
> On Sun, Jul 22, 2012 at 10:51 PM, Thomas Tsou <thomastsou at 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


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