How to syncronizing two UmTRXs

Andrey Sviyazov andreysviyaz at gmail.com
Wed Jul 24 04:44:40 UTC 2013


Hi Jiang Wenyi.

System clock of UmTRX is 26 MHz.
And the same for synchronizing clock I/O.
Thereafter system clock devided by 2 in each UnTRX to get 13 MHz
interleaved I/Q sample clock.

Best regards,
Andrey Sviyazov.
(Sent from mobile)
24.07.2013 4:42 пользователь "jiangwy" <wyjiang at ljshuoda.com> написал:
>
> Andrey Sviyazov
>
> If I connect X7 between master and slave, then the clock of master is
13MHz and the clock of slave is 26MHz. Is that right?
>
> Best regards,
> Jiang Wenyi
>
> From: Andrey Sviyazov
> Date: 2013-07-23 22:59
> To: wyjiang
> CC: UmTRX
> Subject: Re: How to syncronizing two UmTRXs
> Hi Jiang Wenyi.
>
> To synchronize clock of several UmTRX you have to leave one of them in
master mode,
> but all others must be switched to slave mode.
> Master/slave control switch for 26MHz clock is S3(MHz).
> I/O connector for 26 MHz clock is X7.
> In case of master mode X7 becomes output and input in case of slave mode.
> To set master mode turn switch S3 to the downward and to upward for the
slave mode.
> Please find text on the PCB board to be sure.
>
> BTW, if you would like to use external clock source then all of UmTRX's
must be in slave mode,
> i.e. their clock connectors must be inputs.
>
> Best regards,
> Andrey Sviyazov.
>
>
> 2013/7/23 jiangwy <wyjiang at ljshuoda.com>
>>
>> Hi All,
>>
>> I have two UmTRXs v2. How to make the clock of them syncronized?
>>
>> ________________________________
>> Jiang Wenyi
>
>
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