Problem

 

Probable Cause

Corrective Action

When using a GPS

The GPS receiver did

Before starting correct

receiver, you cannot

not yet start correct

measurement, the GPS

correctly transmit

measurement.

receiver generates a low-

position data.

 

 

pitch tone every 10 seconds.

 

 

 

When starting correct

 

 

 

measurement, it generates a

 

 

 

high-pitch tone. (If not using

 

 

 

the internal GPS receiver,

 

 

 

press [F], [MARK] and

 

 

 

select “OFF”).

 

 

 

You cannot receive any

You did not correctly

Access Menu 3S0 and

APRS data.

program a group code.

program “APK003”.

 

 

 

 

“MCP ERR” appears on

1

Loose cable

1 Ensure that the connection

the display. (MCP-4A

 

connection.

between the TH-D72 and

communications error)

 

 

the PC is correct.

 

2 Your PC may be

2 Shut down other software

 

 

trying to process too

that you may be running.

 

 

much at once.

 

 

3

There are other

3 Turn the TH-D72 power

 

 

reasons as to why

source OFF and ON, one

 

 

communications was

time.

 

 

not possible.

 

 

 

 

 

Concerning the received frequency display, an unmodulated signal may be received. This is according to the set intrinsic frequency form.

 

<A band>

<B band>

 

(144 MHz + 49.95 MHz) x 2

– (430 MHz - 45.05 MHz)

= 45.05 MHz, 49.95 MHz

VxU reception

MHz + 49.95 MHz) x 4

– (430 MHz - 45.05 MHz) x 2

= 45.05 MHz, 49.95 MHz

(144

(430 MHz - 49.95 MHz)

– (144 MHz + 45.05 MHz) x 2

= 45.05 MHz, 49.95 MHz

UxV reception

 

 

 

(430

MHz - 49.95 MHz) x 2

– (144 MHz + 45.05 MHz) x 4

= 45.05 MHz, 49.95 MHz

GPS setting: 16.369 MHz x n (n = multiple)

40