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It is supported on the Viking Mobile Radio, software version 8.10.x or later. Location
service requires an external GPS module connected though the RS232 serial port. The
Viking radio supports any receiver with RS232 serial output. The receiver must be
configured to transmit the GPGGA and GPRMC NMEA sentences. P25 Trunking and
Conventional IP data between a radio and an application with access to the fixed host is
supported. Basically, data flows between the radio and the system. Radio to radio
operation is not currently supported.
The radio processes GPS data from the receiver and sends it over the system to the
Location Services Host System (LSHS). The LSHS is an application that can request and
receive GPS data from radios (sometimes called "Location Server"). The Tier 2 Location
Services Standard defines a protocol between the LSHS and the radios. The protocol is
called the Location Request/Response Protocol (LRRP). EFJohnson radios with software
supporting Location Services, support the LRRP protocol. The system must support IP
data and can be P25 Digital Conventional and/or P25 Trunking.
The radio has two general Location Service features. The first is the ability to display GPS
data on the radio's display. The second is the ability to receive commands from and send
data to a location server.
The "Display GPS" function does two things:
1 Button Press activates the GPS Data Display menu.
2 Button Press and Hold sends GPS data to the location server.
Refer to the software manual for function programming. The following table shows the
GPS data display that will display.
Table 4.2 GPS Data Display
Element
Description
Element
Lat/Long
The current latitude and longitude of the
radio.
Altitude
The altitude.
Ground Speed
The horizontal speed.
Course
The course over ground in degrees.
Date/Time
The current GPS time and Date.
Num of Sat
The number of satellites used in the
current GPS fix.
Draft 02 - Sep 1 2015
Viking Mobile Radio Operating Manual
Description
Notes
Notes
Pressing the Menu/Select button will toggle between display
formats for this element.
Adjusted for the time zone programmed by Armada.
This element displays the satellites used in the current fix
not the number of satellites currently in view.
Radio Wide Features
4-19
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