Re: [time-nuts] PCI-E Serial Card For Windows NTP?

Trying not to go offtopic. If there are specific lists for this type of nuttery, contact me off list - would love to learn and discuss more. That said - if you're going to test the impact on latency for interrupt coalescing, I'd suggest using sockperf ping pong test: https://github.com/mellanox/soc

Re: [time-nuts] PCI-E Serial Card For Windows NTP?

Hi I have had no problem with a variety of PIC serial cards. I’ve got a few from maybe six different outfits. They run up to at least 115.2K baud. The multi port versions will do that on all ports at one time. They are far more dependable than their USB counterparts. I’ve run them under XP, Vi

Re: [time-nuts] Jackson labs fury gpsdo with docxo for sale

According to the brochure, they are only $750 new. Or am I missing something here? R On 26 June 2015 at 03:30, Mark Spencer wrote: > Hi I'm wondering if there is any interest in my Jackson labs fury (desktop > version) with the docxo option. I purchased it new from Jackson Labs in > 2012. >

Re: [time-nuts] Splitters for the GPS antenna

Sorry for the thread hi jack. I also have a lightly used Symmetricom 58535A dual port (one antenna, two receivers) gps splitter I would be happy to part with. Please contact me off list of interested in this and perhaps we can come an agreement. It's fairly heavy so shipping may be pricey.

Re: [time-nuts] PCI-E Serial Card For Windows NTP?

For Serial ports and Personal Computers (PCI or PCIe), work with LAVA Link in Toronto, Ontario Canada. http://lavalink.com The Chinese cheap add-on card is a mine field of bad designs or implementations. You will find that out (first hand) once you push the serial speed beyond 9600 baud, unrelia

Re: [time-nuts] PCI-E Serial Card For Windows NTP?

I know next-to-nothing about Windows. Serial ports are pretty standard. I'd get the cheapest card. I'd probably pay a bit more for a second port. It might be handy tomorrow. One difference between chips is the depth of the FIFO. PCI card now come in two heights. Make sure you get the right

[time-nuts] Jackson labs fury gpsdo with docxo for sale

Hi I'm wondering if there is any interest in my Jackson labs fury (desktop version) with the docxo option. I purchased it new from Jackson Labs in 2012. It has sat on a shelf powered up for almost the entire time I have owned it. I've been very happy with the unit but I haven't made much u

Re: [time-nuts] Two V(in)s walk into a bar...

Hi The real answer is a bit complicated. (As in at least a week of class, I sitting in a refresher course now), Ground = no current in normal use Return = where the IC ground pin connects A lot of confusion goes on between return and ground. In about 99.99% of schematics return is miss-labeled

Re: [time-nuts] Two V(in)s walk into a bar...

>From a 2012 discussion on time-nuts by M. Simon and Voker Esper: There are 3 parts to the article - links are available at the end of every section to the next section

[time-nuts] Splitters for the GPS antenna

I initially tried using Dishtv splitters with qualified success. On closer examination the bandpass between dish 1 and dish2 is different and neither actually calmed to pass the GPS frequencies. And indeed I had significantly different path losses. I wanted a better solution. I did a brief search

[time-nuts] PCI-E Serial Card For Windows NTP?

Hi, I'm still pursuing setting up a fairly accurate NTP server connected to my Nortel/Trimble GPSTM. So far I've been playing with a Raspberry Pi 2, and have made fairly good progress using a bunch of tweaks detailed by another member of this list. However, it has been noted that the Raspberry

Re: [time-nuts] Two V(in)s walk into a bar...

Consider the equivalent circuit of a common ground for two separate supplies. Any resistance or inductance can cause the effective voltage of one supply to be affected by the other as the current drawn varies. This is assuming a common return to the ground star. Separate the returns and one supply

Re: [time-nuts] windows and leap seconds

On Thu, Jun 25, 2015 at 6:43 AM, Tom Harris wrote: > This is a "FAST PUBLISH" article created directly from within the > Microsoft support organization. The information contained herein is > provided as-is in response to emerging issues. As a result of the speed in > making it available, the mat