ashtech Z-Xtreme System Manual page 7

Initialization................................................................................................. 69
Accuracy..................................................................................................... 69
Troubleshooting ............................................................................................... 71
Base System Troubleshooting ............................................................................ 72
GPS Receiver Does Not Track Satellites ....................................................... 72
Step 1. Is the GPS receiver powered up? .................................................. 72
Step 2. Is the GPS Antenna Connected to the Receiver? .......................... 73
Step 3. A component may be malfunctioning. ............................................ 73
Base System Does Not Transmit Data ........................................................... 74
Step 1. Is the base radio powered up? ....................................................... 74
Step 2. Is the Base Radio Connected to the GPS Receiver? ..................... 75
Step 3. Is the Base GPS Receiver Set to Function as RTK Base? ........... 76
Step 4. Is Receiver Set to Output RTK Base Data on Port B? .................. 76
Step 5. Base coordinates entered correctly into base receiver? ............... 76
Step 6. Is base receiver tracking satellites? ............................................... 77
Step 7. You may have a component that is malfunctioning ........................ 77
Rover System Troubleshooting .......................................................................... 78
GPS Receiver Does Not Track Satellites ....................................................... 78
Radio Not Receiving Data Transmitted By Base ............................................ 78
Step 1. Is the rover radio powered up? ..................................................... 78
Step 2. Is the rover radio antenna connected to the rover radio? .............. 79
Step 3. Is the base system transmitting data? ............................................ 80
Step 4. Is the base radio antenna connected to the base radio? ............... 80
Step 5. Is the rover radio set to the same frequency as the base? ............ 80
Step 6. Is line-of-sight between base and rover antennae obstructed? ..... 81
Step 7. Are you within range specifications of your radio system? ........... 81
Step 8. Are you being jammed? ................................................................ 82
Step 9. You may have a malfunctioning component in your system .......... 83
Rover System Is Not Computing A Position ................................................... 83
Step 1. Is the radio receiving data transmitted by the base? ...................... 83
Step 2. Is the radio connected to the GPS receiver? ................................. 84
Step 3. Is the radio connected to the correct port? ..................................... 84
Step 4. Is the GPS receiver tracking satellites? ......................................... 85
Step 5. Are base and rover tracking at least 4 common satellites? ............ 85
Step 6. Your rover receiver may be malfunctioning ................................... 86
Rover Computing Position With High Uncertainties ....................................... 86
Step 1. Is the GPS receiver set to function as an RTK rover? .................. 86
Step 2. Are base and rover tracking at least 5 common satellites? ............ 86
Step 3. HDOP & VDOP Values Too High for Precision Requirements? ... 87
Step 4. Precision requirements too stringent for RTK? ............................. 88
Step 5. Your rover receiver may be malfunctioning ................................... 88
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