SECTION SEVEN: Troubleshooting and servicing the 958 system

TABLE 12: Troubleshooting the 2201 and 2301 installation

If . . .

Then . . .

 

 

 

 

Satellite signals are often lost, or the 2201

The 2201 or 2301 may be partially shaded by metallic objects around

works while you’re travelling in one

it. Re-position or raise the 2201 or 2301 away from the object for a

direction, but not the opposite one.

better satellite view.

 

Signals may be lost when the 2201 or 2301 is under a bridge or when

 

shielded by buildings.

 

 

Poor SNR readings are obtained even

Check the quality of the antenna location— the antenna should have a

after running the 958 for several minutes

clear view of the sky. For the correct antenna placement, see Figure 8

 

on page 13.

 

Make sure the antenna is clean, and not covered with ice, snow, or

 

exhaust soot.

 

 

You’re having difficulty obtaining WAAS

Check that WAAS is available in your operating area.

satellites

 

 

Reset the 958’s satellite elevation setting to its default (10 degrees).

 

Check that the 958’s DIFFERENTIAL OPERATIONS option is set to

 

either WAAS or AUTO.

 

 

The following error message appears on

 

the 958 display:

 

COMM FAIL

With power on, check the antenna and wiring connections.

 

Disconnect the 2201 or 2301 from the 958, then measure the 7-pin

 

2201/2301 connector for 10 - 36 volts at pin 7, ground at pin 6.

 

Check the 2201 or 2301’s remote-on: Pin 5 should measure less than

 

5 ohms to ground.

 

After testing above, re-connect the cable and press the PWR key to

 

turn the 958 off, then turn it back on again.

TOO FEW SATS

Check if anything is blocking the 2201 or 2301’s view of the sky.

 

The almanac may not be complete; allow up to 30 minutes for full

 

initial acquisition.

 

 

958 Installation Manual, Rev. A1

Page 37

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NorthStar Navigation 800/628-4487, 978/897-6600 installation manual Troubleshooting the 2201 and 2301 installation, Then
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