[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] 10MHz and 1pps signal synchronous
|
From: |
Matt Ettus |
|
Subject: |
Re: [Discuss-gnuradio] 10MHz and 1pps signal synchronous |
|
Date: |
Mon, 18 Jan 2010 14:08:23 -0800 |
|
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.5) Gecko/20091209 Fedora/3.0-4.fc12 Thunderbird/3.0 |
On 01/18/2010 01:53 PM, Per Zetterberg wrote:
Hi All,
On the FAQ page http://gnuradio.org/redmine/wiki/gnuradio/USRP2GenFAQ it
is said "the PPS signal should be synchronous to the 10 MHz reference".
I this really necessary ?
If you need to be able to sync the sampling to the exact 10ns sample,
then you need it synchronous. You don't need to be synchronous if:
- you are ok with +/-10ns ambiguity,
- it is ok that some seconds will contain exactly 100e6 samples while
some will have 100e6 - 1 or 100e6 + 1 samples,
Can I run with a pps signal but without 10MHz ?
Yes, you can, with the same caveats as above.
Matt