external clock reference

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n_qrtu
Posts: 17
Joined: Fri Feb 12, 2016 3:59 am

external clock reference

Post by n_qrtu »

Hello,

I am planning to use an external clock to drive the CLK entry of the bladeRF.
(This is in order to synchronize two boards, one is the Tx, the other one the Rx: we have implemented clock synchronization in software, but for the students in our class we would like to get them started without the software clock/carrier synchronization, but rather synchronizing in a first step the two board with an external reference, split to the two boards)

I searched but I could not find any clear references/documentation on the recommended specs for the external clock, if anything needs to be changed on the board or the software, etc.
So if anyone can point me to some documentation on this, it would be great!

In principle I am planning to use a 10 MHz reference clock (I found that this is the most commonly used reference clock).
Is this going to be fine to be used with the CLK entry? Which voltage level (or range accepted) should provide my 10 MHz reference? What else needs to be changed on the board and in the software?

Also, I would appreciate any recommendation on where to buy such a 10 MHz reference clock (preferably something potable, USB powered?)
(We have in our lab a very precise signal generator but that is way too bulky to be used in a class)

Thank you for your help.

Best Regards,
Nicolae
n_qrtu
Posts: 17
Joined: Fri Feb 12, 2016 3:59 am

Re: external clock reference

Post by n_qrtu »

I think I am going for these components, I guess they should do the job:

http://www.wenzel.com/model/streamline/
http://www.wenzel.com/model/power-splitter-lnps/

However, I need a power supply of +15 or +12 VDC, so it cannot be powered on USB from a laptop.

Nicolae
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