Thanks James From: USRP-users [mailto:usrp-users-bounces@lists.ettus.com] On Behalf Of Marcus Müller via USRP-users Sent: Monday, June 30, 2014 2:11 PM To: usrp-users@lists.ettus.com Subject: Re: [USRP-users] Using external 10 Mhz clock on B200 as reference Hi James, You should specify "--ref external" on the command line, if I'm not mistaken.

The DDs is part of the Rb loop, the PLD divides by 3 and 2, the 10 MHz is a direct function of the XTAL. I am sure the PLD also has other functions. Older models had a 50.255 XTAL with a DDS on the output, I think the change occurred some time between 2000 and 2002. Bert Kehren In a message dated 11/15/2011 8:02:57 P.M.

I have been following the back >> and forth comments on the Time-Nuts list about improving the >> Trimble T-bolt's 10 MHz output but confess that most of it is pretty >> much deeper technical voo-doo than I am comfortable with. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com

On 8/29/21 10:29 AM, Robert DiRosario wrote: > Andrew Sureflex (FSJ) is a lot more flexible then the LDF4 Healix, > which is what you find a > lot of on ebay and at hamfests. > > Here is some 1/4"  Sureflex, new: > > Andrew Type N Male to Type N Male Sureflex Cable 30 feet > F1RNA-PNMNM-30-L1 NEW!

> > 2) I want to distribute 10 MHz references by fiber. There are > RF-over-Fiber products available, but too expensive for me (thousands of > $$$ per xmit/rcv set). I am thinking that it should be possible to use > fiber Ethernet components to do this. I don't mean IEEE 1588 but a much > simpler, no-computer-required, solution.

I have an issue with reading data from the USRP B200 on Windows 10. When I run > the benchmark_rate with a 20 MHz reception bandwidth, I see losses of more than 50 > percent. However, there are no losses during transmission. I have followed all the > instructions, including modifying the registry and disabling power management for USB.

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On 11/05/2010 09:28 AM, Achim Vollhardt wrote: > Any idea on what would be a preferred (stable) device for a 10 MHz phase > detector? I know that many use the 4046 (which has amongst others an XOR > intetgrated) but what are the exact pros and cons of the different > approaches compared to a (example) SOT-23 type 74HCT1G86?

Pete Rawson On Nov 5, 2010, at 2:28 AM, Achim Vollhardt wrote: > Any idea on what would be a preferred (stable) device for a 10 MHz phase detector? I know that many use the 4046 (which has amongst others an XOR intetgrated) but what are the exact pros and cons of the different approaches compared to a (example) SOT-23 type 74HCT1G86?

It makes sense to make it an integer multiple of a clean 10 MHz reference clock. That way you have a clean clock that you can use for two things: - reference counter - sampling the delay line taps The reason you want low jitter for these parts of the design is that it directly affects the timing uncertainty of your measurements.