AvMap ekp iii c ユーザーズマニュアル

The following is a brief guide to some of the problems you may experience while using the

EKP-III with common solutions.

No Power — The power connections are loose or not fully engaged. Make sure all Power Cable

connections are secure. Make sure the power supply is operating properly. Check the fuse locat-

ed at the end of the cigarette plug. (To open unscrew the middle circle at the tip of the adaptor.)

Position fix doesn’t change — The signal from one or more satellites has been lost; the posi-

tioning information displayed is the most recent available.

Position fixes vary a lot — GPS accuracy is affected by several variables, the most prevalent

of which are the geometric quality of the fix. Therefore, the specified accuracy of 15 Meters

RMS in 2D is statistical, not absolute and assumes the absence of Selective Availability which

was discontinued in April 2000.

The EKP-III is not obtaining position fixes — If the EKP-III is using an internal GPS

Receiver, proceed to the GPS status screen:

Review the number of satellites in use. If zero, check that the antenna has a clear view

of the sky and that the connections have been made properly. If less than four satellites are in

use, the GPS receiver may have difficulty receiving a fix. Try repositioning the antenna. A GPS

fix requires a minimum of three satellites and a poor Signal Quality on one or more satellites

may preclude receiving a position fix.

Verify the user setting for Fix Source is listed as Internal GPS:

If the EKP-III is using an External GPS receiver, proceed to Fix functions screen:

Verify that the Fix Source is listed properly (External NMEA) as indicated in the

System Setup section of this User Manual (see Chapter 13) and that the Baud Rate is set cor-

rectly for your GPS receiver (the EKP-III requires 9600- Baud Rate). Verify that the data cable

connections are proper.

External device is not responding — The data port is not turned on or is not outputting

EKP III USER MANUAL

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