[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] USRP synchronization

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] USRP synchronization
Date: Tue, 23 Mar 2010 10:42:23 -0700
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100301 Fedora/3.0.3-1.fc12 Thunderbird/3.0.3

On 03/15/2010 10:24 PM, Per Zetterberg wrote:

4.) Do the PLL's on the daugherboard tune every time a C++ or Python
is run or every time the board is powered on? i.e. for phased arrays
will we
just need to calibrate every time the board is powered on or every
time we
take a given stream of data?

Every time you send the tune command. You should only send this when
you need to change frequency, not every time you start streaming.

I have a special case. I want to transmit and then receive and then
transmit using xcvr2450. Will the phase of the transmitter be the same
during the first and second transmit ? I am assuming I call tune once,
and then receive and transmit on the same frequency.

The XCVR2450 has one LO, and it runs continuously, whether or not you TX or RX. So there won't be phase discontinuities.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]