User's Manual

Table Of Contents

EA Mobile User Guide

6. Reading mode

• none of the endpoints in the route have been assigned coordinates

• when the GPS system is not delivering usable location data

• when you have a very small route list (the FIFO option requires less than 300

endpoints) and the EA_Mobile/vehicle is moving slowly or stopped.

Assigning endpoint coordinates

For a route whose endpoints have not yet been assigned formal latitude and

longitude coordinates, the system can find and interrogate each endpoint using

the sequential FIFO method. It then automatically assigns temporary GPS

coordinates (according to EA_Mobile/vehicle position) as the endpoint is read.

Each time the endpoint is read thereafter, its coordinates will be rewritten in the

same manner until formal coordinates are entered in the route for that endpoint

via host software.

GEO option For endpoints with Lat/Lon coordinates, the GEO option seeks only those that are

determined to be within the interrogation window (as in the Lat/Lon option). It also

seeks ALL endpoints without coordinates at all times during the route until they

are successfully read, regardless of the EA_Mobile’s present location. Routes with

more than 100 endpoints without Lat/Lon coordinates are not allowed in the GEO

option.

Figure 6-4.

Assigning coordinates

When a endpoint is located and read, the EA_Mobile assigns temporary

coordinates based on the current EA_Mobile/vehicle position.

• Use the GEO option when you want to streamline coverage and optimize

data acquisition speed for a route that contains a mix of endpoints with and

without Lat/Lon coordinates.

L/L

L/L L/L

L/L

GEO option selects those

transponders with L/L

coordinated that are

calculated to be within

range of the RTMI at the

given moment –

plus ALL transponders

with L/L coordinates,

regardless of location.

