Yellowjacket Plus GPS Option

The GPS screen of the Yellowjacket Plus provides position and timing information from the Global Positioning System of sat- ellites. The Motorola GPS receiver provides accurate informa- tion after synchronizing with at least 3 of the 24 satellites.

The Yellowjacket Plus must have a clear view of a good por- tion of the sky in order to communicate with the GPS satel- lites. The GPS receiver should lock within a few minutes. The only exception is when the unit is turned on in a new area. If the receiver was last turned on in California and now in New Jersey, the GPS receiver could take up to an hour to lock.

The status bar at the bottom of the Yellowjacket Plus screen shows the current date and time (Greenwich Mean) as well as the current latitude and longitude in decimal degrees. There is also a separate GPS screen which shows satellite informa- tion.

The GPS information is stored in the log file when enabled for later conversion by Chameleon. Each record will be tagged with GPS information if so desired.

If you require GPS time-stamping with your 802.11b measure- ments and Yellowjacket PLUS does not display the GPS screen or the main menu screen does not show a bottom GPS data line similar to this:

We recommend you send in your Yellowjacket PLUS to be upgraded with the internal GPS option. See accessories page in this manual or contact BVS for more information.

RTC MARKER MODE

If there is no GPS module attached, the YellowJacket system uses the internal real-time clock of the iPAQ for timing. In addition, there is a marker that starts at 0. By pressing the but- ton to the right of the marker value, the marker increases by 1. These values are stored in any log files created for later con- version by Chameleon. The screen above shows Yellowjacket with an internal GPS receiver detected. The screen below shows the RTC window when no GPS receiver is detected.

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