Instruction manual

Understanding CPD Page 35
Understanding
Troubleshooting
The following problems are sometimes encountered by users new to Z-12 Real-Time
Sensor. If your system isn’t working properly, please refer to this list. If you need
further assistance, please call an Ashtech custom er service representative.
Table 3.1: Troubleshooting Tips
Symptom Action
LED displays constant amber Indicates the system is not operating. Try to clear internal/external
memory with $PASH,INI. Should symptom persist, contact
Customer Support
PC cannot communicate with
Sensor
 Verify cable connections.
 Verify communication BAUD rate and communication
software setting.
 If symptom persists, clear internal memory with $PASHS,INI.
 If symptom persists, cycle power.
Sensor not in CPD Rover
mode
 Verify the Sensor is capable of Real-Time Z operation (refer to
Specifications and Options on page 5 for J option).
 Verify the Sensor is in Rover mode with $PASHQ,CPD.
$PASHQ,CPD,DLK has no
information
 Verify that the receiver is in CPD base mode or in CPD rover
mode.
 Verify that the antenna connection is connected to the GPS
antenna. The GPS antenna must be mounted outdoors, with a
clear view of the sky. Nearby buildings and vegetation can
block the GPS signals or introduce multipath by reflecting the
GPS signals.
 Verify the sensor is computing autonomous position properly.
 In the base sensor Verify the entered base station coordinates
as well, as described in next trouble shooting
 In the rover sensor, verify the data link between the base and
rover/remote. In case of hardwired data link between
receivers from different vendors, check the hardware
handshaking in the RS-232 connection.
Base beeps  The entered coordinates differ from the computed coordinates
by more than 500 meters.
 Verify the sensor is computing autonomous position properly.
 Verify and re-enter the coordinates or enter the raw position
as the base coordinates as described in Base Position
Coordinates Selection: $PASHS,CPD,UBS on page 40.