Laser LS8000-3 manual See the Automatic Baud Rate Detection

LaserSpeed 8000-3 Instruction Handbook

Appendix E: Troubleshooting Guide

	are typing while pins 2 and 3 are
	connected. If no characters appear
	on the screen, the cable or computer
	serial port may be faulty.
If using RS-232 over a long	See the Automatic Baud Rate Detection
cable, the baud rate may
	section to reset the baud rate to a lower
too high.
	rate, or connect a shorter cable.
Switch to RS-422 for	RS-422 uses differential signals that have
communications.
	much better noise immunity than RS-232.
	USB to RS-422 converters are
	commercially available.
The gauge is communicating, but I Terminal Settings	The gauge does not echo the characters
can't see what I'm typing in	you are typing, so you must configure
HyperTerminal.	your terminal program to echo. Turn on
	the "Echo typed characters locally"
	setting in HyperTerminal. Adjust terminal
	settings to match the following:

Time scale in LaserTrak looks	LaserTrak is missing data	The X axis in LaserTrak is drawn based
wrong	points.	on the gauge's User Update Rate setting.
		If the gauge is configured to output data
		very fast, but baud rate is such that there
		is not enough time to send each reading,
		some readings will be dropped. To
		correct this problem:
		1. Change the User Update Rate to
		output data less often
		--- or---
		2. Switch to a faster baud rate.
LaserTrak detects gauge on the	Computer has virtual serial	User Software sometimes creates virtual
wrong com port.	ports or a modem.	com ports that LaserTrak searches for a
		LaserSpeed gauge.
	1. If using LaserTrak 4:	1. Cancel the "Find LaserSpeed
		Gauges" screen if it appears when
	Disable the virtual

Part No. 93463 / Drawing No. 0921-01561 Page 206 of 221 Revision A (Sep 2007)