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Re: [Discuss-gnuradio] GPSDO detection in B200
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From: |
Marcus D. Leech |
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Subject: |
Re: [Discuss-gnuradio] GPSDO detection in B200 |
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Date: |
Fri, 06 Jun 2014 15:02:20 -0400 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.24) Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16 |
On 06/06/2014 02:51 PM, Robert Light wrote:
Is 1PPS used if I have GPSDO installed or does the B200 assume that 10MHz is
already good enough?
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In all the USRPs that have 10MHz and 1PPS, the 1PPS is used only for TOD
synchronization, for operations like: set_time_next_pps().
There is no internal PLL that is phase-locking to 1PPS--the
assumption is that the 1PPS is locked to 10MHz already, and it's just used
as a trigger for TOD (time-of-day) setting operations.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org