LMS TxLO noise

Alexander Chemeris alexander.chemeris at gmail.com
Sat Jul 21 20:53:58 UTC 2012


On Sat, Jul 21, 2012 at 10:43 PM, Alexander Chemeris
<alexander.chemeris at gmail.com> wrote:
> On Sat, Jul 21, 2012 at 12:44 AM, Thomas Tsou <thomastsou at gmail.com> wrote:
>> On Fri, Jul 20, 2012 at 6:09 PM, Alexander Chemeris
>> <alexander.chemeris at gmail.com> wrote:
>>> On Fri, Jul 20, 2012 at 10:22 PM, Thomas Tsou <thomastsou at gmail.com> wrote:
>>>> I also still have errors with auto calibration.
>>>
>>> Well, you haven't enabled Rx chain in LMS and thus it's reasonable
>>> that Rx-related calibration is failing. You should do "--lms-rx-enable
>>> 1" before you try to do anything with Rx.
>>
>> Hmm. Similar error.
>
> Hum. I just realized that we set register 0x09 to 0x80 in lms_init(),
> which means we set RXOUTSW to 1 and pins 113-116 of the chip are
> connected directly to the ADC. While this should not make any
> difference in theory, it's better to set this register to 0x00 on init
> to avoid any external interference.

Note, that I've checked in this change and now 0x09 is initialized to
0x00 in the fairwaves/umtrx branch.

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




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