Magellan ProMark3 RTK Manual do Utilizador descarregar pdf (Página 5)

possibly overpowering transmissions. You can read more about FHSS at

http://en.wikipedia.org/wiki/Frequency-hopping_spread_spectrum.

One consequence of the frequency hopping is if you listen to any of the

frequencies in the hop table with a scanner (I use and recommend the Yaesu

FT60 ) you will hear broken squelch on all of the frequencies listed in the

channel table because the radio is using all of the frequencies, hopping from

channel to channel.

Click on this link [ http://www.magprogps.com/ms/PM3_RTK_Radios/SquelchBreak.wav ] to hear

what the radios sound like on a scanner.

Here is a copy of the starting frequency table from the radio user’s guide:

Channel

S200

Frequency

(MHz)

Channel

S200

Frequency

(MHz)

Low Sub Band High Sub Band

0 902.75 25 915.25

1 903.25 26 915.75

2 903.75 27 916.25

3 904.25 28 916.75

4 904.75 29 917.25

5 905.25 30 917.75

6 905.75 31 918.25

7 906.25 32 918.75

8 906.75 33 919.25

9 907.25 34 919.75

10 907.75 35 920.25

11 908.25 36 920.75

12 908.75 37 921.25

13 909.25 38 921.75

14 909.75 39 922.25

15 910.25 40 922.75

16 910.75 41 923.25

17 911.25 42 923.75

18 911.75 43 924.25

19 912.25 44 924.75

20 912.75 45 925.25

21 913.25 46 925.75

22 913.75 47 926.25

23 914.25 48 926.75

24 914.75 49 927.25

Changing the initial frequency for two RTK-pairs operating nearby each other

allows them to NOT interfere with each other.

Debugging the PM3 Radio Link

The ProMark 3 receivers can be a bit challenging if the radios don’t work.

There are not many things you can do to verify the link. The green LED’s can be

very difficult to see outdoors.

Luckily, you can fully test the radio power and serial connections by

running the ‘Utilities: Configure Radio’ tool. If the tool reports ‘North American

Radio Detected’ then you can be sure the radios are working.

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