[time-nuts] USB to Serial Connectors for GPS Modules

Ulrich Bangert df6jb at ulrich-bangert.de
Thu Jun 5 00:28:47 EDT 2008


consider the latency times of ANYTHING on a USB provided virtual serial
connection to be in the order of 1 ms. If no serial data is send but
only status signals change their state the latency can even be higher.

Best regards
Ulrich Bangert

> -----Ursprungliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Matthew Smith
> Gesendet: Donnerstag, 5. Juni 2008 03:26
> An: Time Nuts List
> Betreff: [time-nuts] USB to Serial Connectors for GPS Modules
> Hi Folks
> Are there any issues with connecting computers to GPS modules through 
> USB to serial devices like the FTDI FT232R, as opposed to 'native' 
> serial ports?  At the moment, I'm thinking in the context of an NTP 
> server, but am interested in a general context should I need 
> to move to 
> USB-only PCs.  Didn't know if there were any latency issues 
> or anything.
> Cheers
> M
> -- 
> Matthew Smith
> Smiffytech - Technology Consulting & Web Application Development
> Business: http://www.smiffytech.com/
> Personal: http://www.smiffysplace.com/
> LinkedIn: http://www.linkedin.com/in/smiffy
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