A325 GNSS Smart Antenna User Guide
18
PN 875-0318-000 Rev D2
Appendix A: Troubleshooting
Table A-1 provides a list of issues with possible solutions to help you troubleshoot anomalous A325
operation. Refer to Appendix B, “Technical Specifications” if necessary.
Table A-1: Troubleshooting
Issue
Possible Solution
Receiver fails to power
•
Verify polarity of power leads
•
Check 1.0 A in-line power cable fuse connection (only if
the cable has a built in fuse)
•
Check integrity of power cable connections
•
Check power input voltage (7 - 36 VDC)
•
Check current restrictions imposed by power source
(maximum is 350 mA)
No data from the A325
•
(1) No communication
•
(2) No valid data
•
(1) Check receiver power status
•
(2) Verify it is locked to a valid DGPS signal
•
(2) Verify that it is locked to 4 or more GPS
satellites
•
(2) Check integrity and connectivity of power and
data cable connections
•
Verify the baud rate settings match
•
If trying to connect over Bluetooth, ensure Bluetooth
module is powered ON and device is paired prior to
opening the port
Random binary data from A325
•
Verify the RCTM or the Bin messages are not being
accidentally output (send a $JSHOW command)
•
Verify the baud rate settings match
•
Potentially, the volume of data requested to be output
could be higher than the current baud rate supports.
Try using a higher baud rate for communications.
No GPS lock
•
Check integrity of antenna cable
•
Verify antenna’s view of the sky
•
Verify the lock status and signal to noise ratio of GPS
satellites (this can often be done on the receiving
device or by using PocketMax)
