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 my HOBO loggers. The USB/Serial converters are a little difficult to use, sometimes hanging, necessitating unplugging and plugging back in. They get assigned to various Port numbers but tend to keep the same number from day to day. The ports can be configured in the management function. However the TBOLT refuses to talk to the converter, to the extent that I thought that I must have damaged the TBOLT. Today, as a last resort, I remembered an old PC, dragged it out and stoked it up, and to my delight the TBOLT monitoring program ran without difficulty under Windows 2000 with a conventional serial port. Now I vaguely remember talk about RS232 communications and the need for pull up or down resistors and supplies, but searching the archives I could find nothing relevant. Can anyone tell me how I could run the TBOLT off a USB/Serial converter? cheers, Neville Michie
_______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.