[time-nuts] TBOLT communication

2008-09-24 Thread Neville Michie
Hi, I have just spent a week or two trying to talk to a Trimble Thunderbolt. I have a laptop running VISTA, about which there is little to say. The laptop has no serial ports, but I have some USB/Serial converters that successfully run my HP 3815A and a Samsung GCRU/D, and also communicate with

Re: [time-nuts] TBOLT communication

2008-09-24 Thread Jeroen Bastemeijer
Hi Neville, I use USB-Serial converters. Brand isSweex, there is a common USB2serial chip inside. There was no need to modify anything (pull up resistors or what so ever). First I had communication, but from time to time strange behaviour. It made me think the Thunderbolt was faulty... I

Re: [time-nuts] TBOLT communication

2008-09-24 Thread buehl
Nevil: In my business we use/ supply serial to parallel converters for programming our product originally designed for serial. We ran into most of the problems you have described. The hanging appears to be a windows problem (we use XL pro mostly). Ours uses the Prolific converter and

Re: [time-nuts] TBOLT communication

2008-09-24 Thread Predrag Dukic
I had the same problem with some other devices, and I took apart several converters. Most of them were unable to generate sufficient levels for a proper communication with rs232. Internal charge pump was generating +-6V instead of +-12 or +-15 that is normal for rs232. Putting additional

Re: [time-nuts] TBOLT communication

2008-09-24 Thread Ulrich Bangert
based problem. Best regards Ulrich -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Predrag Dukic Gesendet: Mittwoch, 24. September 2008 15:10 An: Discussion of precise time and frequency measurement Betreff: Re: [time-nuts] TBOLT

Re: [time-nuts] TBOLT communication

2008-09-24 Thread Lux, James P
Pasadena, CA, 91109 +1(818)354-2075 phone +1(818)393-6875 fax -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Predrag Dukic Sent: Wednesday, September 24, 2008 6:10 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] TBOLT

Re: [time-nuts] TBOLT communication

2008-09-24 Thread Arnold Tibus
Hi Neville, I do run my Thunderbolt very successful for quite a while and I do use either my stationary PC (running still with Win2000 on com1 or 2) or with my Laptop (Lenovo T43p with Win XP pro and USB2 ports) and had never a connection problem. For the connection to the USB port I use in

Re: [time-nuts] TBOLT communication

2008-09-24 Thread Predrag Dukic
, September 24, 2008 6:10 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] TBOLT communication I had the same problem with some other devices, and I took apart several converters. Most of them were unable to generate sufficient levels for a proper

Re: [time-nuts] TBOLT communication

2008-09-24 Thread Lux, James P
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Predrag Dukic Sent: Wednesday, September 24, 2008 1:23 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] TBOLT communication Lux, my hardware experiences

Re: [time-nuts] TBOLT communication

2008-09-24 Thread Javier Herrero
Not only that. The TTL are more frequently 3.3V TTL, and the TTL to RS-232 converters are supplied from 3.3V and uses a charge pump doubler and a charge pump inverter. Barely +/-6V. Usually they are designed for, and use, 100nF capacitors... the less expensive ones :) And a bigger capacitor

Re: [time-nuts] TBOLT communication

2008-09-24 Thread Predrag Dukic
One of the converters didn't have any voltage pre-regulation for both the chips, and also one of my pcs gives 6 volts on USB ports That combination worked the best and could talk to virtually all my rs232 devices. I don't remember now the output 232 levels but they were close to 10V 6V x