Magellan ProMark3 RTK User Manual download pdf (Page 2)

Extending ProMark 3 RTK Radio Range

By: Mark Silver, KD7NKY

Igage Mapping Corporation

Date: November 2009

Thesis:

A simple modification for the ProMark3.RTK

factory base radio which allows:

) placing the transmitter on a high

pole, effectively quadrupling range:

Urban ranges increases from 1,400 feet

to 3,800 feet

) powering the GPS and radio from an

external power source

) charging the PM3 base battery during

operation, insuring the base is always

operating at full output power

Warnings (Please Read Carefully):

1. These modifications are ‘totally NOT

factory approved.’ If you implement

any of the changes in this

document, you will void the factory

warranty on your radio. Your only

remedy may be purchasing a new

radio.

2. It is possible to mis-wire your radio cable so 12 volts is fed back into your

ProMark3 receiver’s Vcc connection (+5Vdc). If you do this, your

ProMark3 GPS receiver will be toast.

3. If you use a pole longer than 12 feet, you risk electrocution and

death from overhead power lines. If you don’t have any common you

should not consider making the described modifications. If you make

these modifications, you should insure that the modified radios are not

used near power lines!

In simple terms:

There is a clear risk of electrocution and death from radios placed

on tall poles.

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Magellan ProMark3 RTK User Manual Page 2