Hemisphere GPS Crescent V100 Series, Руководство пользователя

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Appendix A: Troubleshooting
No beacon lock • Beacon reception capability is only
present on V110 model
• Verify that the receiver is tuned to
the correct frequency and bit rate
• Ensure that beacon signal coverage
is expected in your area
• Make sure that environmental noise
is not masking the signal, reducing
the SNR reading
No DGPS position in
external RTCM mode • Verify that the baud rate of the
RTCM input port matches the baud
rate of the external source
• Verify the pin-out between the RTCM
source and the RTCM input port
(transmit from the source must go
to receive of the RTCM input port
and grounds must be connected)
• Ensure corrections are being
transmitted to the correct port.
Using the $JDIFF,PORTB command
on Port A will cause the receiver to
expect the corrections to be input
through Port B
No SBAS lock • Verify Crescent V100’s clear view of
the sky
• Verify the lock status of SBAS
satellites (this can be done with
PocketMAX - monitor BER value)
• Set SBAS mode to automatic with
the command $JWAASPRN,AUTO
Table A-1: Troubleshooting
Symptom Possible Solution