Hi All,
I have two UmTRXs v2. How to make the clock of them syncronized?
Jiang Wenyi
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@ljshuoda.com
** Hi All,
I have two UmTRXs v2. How to make the clock of them syncronized?
Jiang Wenyi
Hi Jiang Wenyi.
Sorry, I forget to say about cable. You have to use UFL-UFL cable to connect X7 of all synchronized UmTRX's. It will be simple cable in case of two UmTRX and star (in parallel) if more then two.
Best regards, Andrey Sviyazov.
2013/7/23 Andrey Sviyazov andreysviyaz@gmail.com
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@ljshuoda.com
** Hi All,
I have two UmTRXs v2. How to make the clock of them syncronized?
Jiang Wenyi
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@ljshuoda.com
Hi All,
I have two UmTRXs v2. How to make the clock of them syncronized?
Jiang Wenyi
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@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@ljshuoda.com
Hi All,
I have two UmTRXs v2. How to make the clock of them syncronized?
Jiang Wenyi
Hi Andrey Sviyazov,
I understand now. I have seen the code in UHDDevice.cpp as following: const double master_clk_rt = 13e6;
So I have made a mistake.
jiangwy
From: Andrey Sviyazov Date: 2013-07-24 12:44 To: wyjiang CC: umtrx Subject: Re: Re: How to syncronizing two UmTRXs 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@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@ljshuoda.com
Hi All,
I have two UmTRXs v2. How to make the clock of them syncronized?
Jiang Wenyi
-
Andrey Sviyazov -
jiangwy