Re: [time-nuts] More on SiLabs 5340

Hi, On 01/31/2018 04:27 AM, John Miles wrote: > >> -Original Message- >> There is a small detail that puzzles me: the ADEV for the internal >> reference 10MHz and 30MHz bends upwards at tau greater than 0.1s. >> Shouldn't that be visible by a change in slope in the phase noise >> plot at

Re: [time-nuts] More on SiLabs 5340

> -Original Message- > There is a small detail that puzzles me: the ADEV for the internal > reference 10MHz and 30MHz bends upwards at tau greater than 0.1s. > Shouldn't that be visible by a change in slope in the phase noise > plot at ~10Hz as well? > > Attila

Re: [time-nuts] Sick Trimble TBolt

At least one model used a comparatively noisy wideband unity gain analog buffer IC. Without the buffer the OCXO PN was is lower. Bruce > On 31 January 2018 at 12:41 Chris Caudle wrote: > > > > What are the markings of the devices close to the BNC connector? > > Just a

Re: [time-nuts] Sick Trimble TBolt

> What are the markings of the devices close to the BNC connector? Just a guess based on some previous comments from Bob, you are probably looking for a logic gate, probably with an LC filter on the output. Could also be some kind of MMIC device, but gate with a filter seems like a good

Re: [time-nuts] Sick Trimble TBolt

On Tue, January 30, 2018 11:33 am, Richard Solomon wrote: > I noticed a spot that looks like it takes a PC mount SMA. Others have noted that the PCB appears to support multiple different footprint oscillators or input of an external oscillator. > Looking at the center pin, it looks like the

[time-nuts] Sick Trimble TBolt

Without any adequate documentation, I decided to probe around the board. I noticed a spot that looks like it takes a PC mount SMA. Looking at the center pin, it looks like the output of the TCXO. I plan to run a small coax from that to the BNC output connector. Perhaps it will make this thing

Re: [time-nuts] Microsemi 3120A sold on eBay

They are becoming the semiconductor/timing MFJ Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com Physical and US Postal Addresses 5 Shrine Club Drive (Physical) HC84 452 Stable Ln (RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N 78.982287 W (Google) GPS: 39.33682 N 78.9823741

Re: [time-nuts] More on SiLabs 5340

Moin, On Mon, 29 Jan 2018 15:38:33 -0500 John Ackermann N8UR wrote: > Today I tried replacing the crystal with a 10 MHz input, and found that > the evaluation board requires surgery to support that. What I was able > to do, though, was feed 10 MHz into the "Input 0" port which

[time-nuts] UK government study on: Satellite-derived Time and Position - Critical Dependencies

UK government study on: Satellite-derived Time and Position - Critical Dependencies https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/676675/satellite-derived-time-and-position-blackett-review.pdf Seems quite comprehensive, and may be of interest to GNSS users. 1.6