LMS TxLO noise

Alexander Chemeris alexander.chemeris at gmail.com
Mon Jul 23 03:17:07 UTC 2012


On Mon, Jul 23, 2012 at 2:17 AM, Thomas Tsou <thomastsou at gmail.com> wrote:
> 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?

Andrey Sviyazov - does ClockIn works as external input in UmTRXv1?

>> 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

Ok, the correct one.


-- 
Regards,
Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио
http://fairwaves.ru




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