Cheers, -chris On Apr 10, 2009, at 5:15 PM, Magnus Danielson wrote: > Tom Van Baak skrev: >> I have a old data device that is spitting out TTL data at 10 MHz. >> There's just a data line (no clock) but the edges clearly indicate >> an internal 10 MHz clock. >> >> I'd like to do a continuous capture of the bits, for up to tens of >> minutes, into a PC.

They both are probably difficult when configured for more than 10 MHz BW.  I will run some simulations, but at 2V p-p into 50 ohms (10 dBm) the required rails would need to be more than 5V, although I have 15V available.  I am unsure of the distortion performance at 20 mA peak output drive. 

. > >> Hi >> You can install unsigned drivers in Windows 10.

I've tried >> multiplying the 10 MHz to the GHz frequencies, but never manage to >> improve on the technique I mention in my first question. >> >> Any ideas for a relatively cheap way of doing this.

> > Possible problems might be that a 10MHz squarewave is > simply too 'slow' > > to be transmitted by an SFP, which expects 1.25Gb/s 8/10 > encoded data. > > Another interesting question would be how much jitter/noise such a > > setup would add?

You really can't sync up some PPSes to the 10 MHz by simple DFFs since the variations may be more than 100 ns during some phases of the training and holdover shifts. The PPS output should always be generated using the 10 MHz such as they have a stable phase-relationship.

I had to spend a couple days working on other parts of the design, but I am back at the 10 MHz circuit again.

On Sun, Apr 22, 2012 at 10:47 PM, wrote: > With factory default settings with 2 PRS-10s, connecting 1PPS_out from one > unit to 1PPS_in on the other, would not align the 1PPS_out pulses. They > were off by several hundred of ns. It was probably an operator error > somewhere.

Knowing the era should help > in the search for information. > > > > Bob > > > >> On May 19, 2017, at 10:21 PM, Scott Armstrong wrote: > >> > >> I acquired a Trimble 16634-10 receiver. A search of the web has > >> turned up nothing so far. > >> The unit is in a steel box built like a tank.

regards Grant > Date: Sun, 3 Feb 2019 23:43:10 -0000 > From: "Paul Bicknell" > To: "'Discussion of precise time and frequency measurement'" > > Subject: [time-nuts] 10 mhz accuracy for a satellite system > Message-ID: > Content-Type: text/plain; charset