OBD2LT & OBD2PDA
These are the main screens you see when you are collecting data. The software is continually requesting the current speed from the OBD interface. This speed information, which is generated from 2 to 10 times per second depending on the type of vehicle, is summarized into one second averages and stored in the data file on the laptop or PDA. This data file is then processed in PC-Travel or PC-LOS to find the various statistics.
The advantage of an OBD interface is that is works in all conditions. There are times when it isn’t possible to use a GPS receiver. For example your route may include one or morel tunnels or large bridges where GPS reception is not good. In these cases an OBD interface can allow you to collect your data.
The disadvantage of an OBD interface is that it doesn’t collect positional information like GPS receivers so you can’t map the data and use the new mapping features in PC-Travel to edit the runs. The OBD interfaces are also considerably more expensive than GPS receivers.
The OBD software was developed for PC-Travel ver 1 when GPS receivers were more expensive and not as good in certain conditions. There also was no mapping option in PC-Travel so the data collected with GPS receivers and OBD interfaces was comparable. Now, GPS receivers are very inexpensive (less than $50), they work in almost all conditions, and the new mapping features of PC-Travel are very useful. You get the OBD software free with the PC-Travel Software Suite but it should be considered an option to use only when GPS doesn’t work.