[time-nuts] Thunderbolt and USB to RS232 converters
Prologix
support at prologix.biz
Tue Jun 24 17:21:24 UTC 2008
While I have no experience with Thunderbolt, I have tested a lot of
USB-Serial converters and found ones with the FTDI chip to be the most
reliable, hardware and software wise.
http://www.saelig.com/miva/merchant.mvc?Screen=PROD&Product_Code=U003
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Javier Herrero
Sent: Tuesday, June 24, 2008 10:13 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Thunderbolt and USB to RS232 converters
I've been using it with Prolific PL2303 based converters with no problem
at all (Aten brand, in my case).
Regards,
Javier
Jeroen Bastemeijer escribió:
> Dear All,
>
> More and more people are starting to play with the Thunderbolts. I
> already received mine :-) Now playing around with them.
>
> First I powered it up and connected it to the normal serial port of the
> PC. The Thunderbolt behaved fine, self survey took some time, because
> the antenna is inside a concrete building with very limited view to the
sky.
>
> However, next I did a test with the same Thunderbolt but now it was
> connected to a USB to Serial converter (brand is Sweex). After
> switchinhg it off and on, I expected the same behaviour as when it was
> connected to the "real" serial port. But... it started to behave very
> strange... instead of starting a normal survey, it started disciplining
> after a couple of minutes (almanac was not even valid). The DAC-voltage
> clipped to the power rail, and the SV and AMU-fields remained "?".
> Resetting (hot, cold, factory default) didn't make any difference.
> When power cycling the unit and connecting it back to the normal serial
> port the normal behaviour returned. I assume it has something to do with
> the USB to serial converter. Is there anyone else with similar
> experience? Or who has used a USB to serial converter with succes?
>
> Thank you, best regards,
>
> Jeroen
>
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Javier Herrero EMAIL: jherrero at hvsistemas.com\par
HV Sistemas S.L. PHONE: +34 949 336 806\par
Los Charcones, 17A FAX: +34 949 336 792\par
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