Uniden BCD996T manual Location-Based GPS Scanning, GPS Compatibility, Initial GPS Operation

UB335ZH.book Page 117 Friday, March 17, 2006 4:35 PM

Location-Based (GPS) Scanning

The BCD996T can make use of data transmitted from an attached GPS unit that lets the radio automatically enable and disable systems based on the geographic information you provide such as:

•Latitude (the center of the range)

•Longitude (center of the range)

•Range (the radius of a circle around the latitude and longitude coordinates selected from .5, 1, 3, 5, 10, 20, 30, and 50 miles.

You set the longitude and latitude to approximate the center of a geographic entity such as your local city and set the range to encircle that center point. By doing so you set aside reception of an adjacent city that otherwise might be undesirably received from one extremity of your city.

In addition, all geopolitical areas are not perfect circles. Therefore you can accommodate these variations by entering multiple sites for the system, eve though the system actually has one site, and use different location settings for each of those additional sites.

See the programming section for specific steps required to apply location data to a radio system.

GPS Compatibility

The GPS must have serial output, and be capable of outputting standard NMEA sentences GGA and RMC. (See “NMEA-0183 ver.3.01” which can be found on the web.) Be sure to set the GPS to output NMEA.

Connecting Your Scanner to a GPS Device

To use the Location Based features of the scanner, you must connect a GPS to the unit. Use the cable provided by the GPS manufacturer. Make sure that their cable terminates in a female, 9-pin serial connector. Insert that plug into the male, 9-pin socket on the back of the scanner labeled REMOTE/GPS. Once the GPS is connected, refer to the sections dealing with inputting selections to enable Location Based feature operation.

Initial GPS Operation

When the scanner first starts receiving a signal from the GPS, it briefly displays GPS Connected and silently locks and unlocks all radio sites according to your

Location-Based (GPS) Scanning

117