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Re: [Discuss-gnuradio] two WBX boards synchronization

From: Nemanja Savic
Subject: Re: [Discuss-gnuradio] two WBX boards synchronization
Date: Wed, 10 Dec 2014 01:32:42 +0100

is there any way to synchronize those two clocks sources?

On Tue, Dec 9, 2014 at 4:51 PM, Marcus D. Leech <address@hidden> wrote:
On 12/09/2014 04:42 AM, Nemanja Savic wrote:
Shouldn't relative phase be constant and 90 degrees for example if transmitted wave had circular polarization?
The samples will be time-aligned, but those samples will have been derived from two independent analog downconversion
  chains, which means that the synthesized LO will have a different relative phase (between the two sides) every time.

On Tue, Dec 9, 2014 at 10:38 AM, Nemanja Savic <address@hidden> wrote:
Yes, the platform is USRP1. What is relative phase in this case if they are alligned in time?

On Mon, Dec 8, 2014 at 4:19 PM, <address@hidden> wrote:

You haven't stated which USRP motherboard platform, but I assume you're talking about the USRP1, given the 4RX image.  Yes, the samples
 will be aligned in time, but the relative phase will be random every time you re-tune or start a new session.



On 2014-12-08 06:03, Nemanja Savic wrote:

Hi all guys,

I am about to make a receiver with two WBX daughterboards. I want to receive simultaneusly with horizontal and vertical antenna. For this purpose I want to use 4RX FPGA image. My question signals obtained in this way, from two daughterboards, alligned in time?

Many thanks,

Nemanja Savić

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Nemanja Savić

Nemanja Savić

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

Nemanja Savić

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