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V102 GPS Compass User Guide

No SBAS lock • Verify the V102 has a clear view of the sky

• Verify the lock status of SBAS satellites (this can be

done with PocketMax - monitor BER value)

• SBAS lock can only get if you are in an appropriate

SBAS region (currently, there is limited SBAS

availability in the southern hemisphere)

• Set SBAS mode to automatic with the

$JWAASPRN,AUTO command

No heading or incorrect

heading value

• Check CSEP value is fairly constant without varying

more than 1 cm (0.39 in)—larger variations may

indicate a high multipath environment and require

moving the receiver location

• Recalibrate the tilt sensor with $JATT,TILTCAL

command if heading is calculated then lost at

consistent time intervals

• Heading is from primary GPS antenna to secondary

GPS antenna, so the arrow on the underside of the

V102 should be directed to the bow side

• $JATT,SEARCH command forces the V102 to

acquire a new heading solution (unless gyro is

enabled)

• Enable GYROAID to provide heading for up to three

minutes during GPS signal loss

• Enable TILTAID to reduce heading search times

• Monitor the number of satellites and SNR values

for both antennas within PocketMax—at least four

satellites should have strong SNR values

• Potentially, the volume of data requested to be

output by the V102 could be higher than the current

baud rate supports (try using 19200 as the baud

rate for all devices or reduce the amount of data

being output)

Table A-1: Troubleshooting (continued)

Symptom Possible Solution

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 59 60

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Directed Electronics VS102 Guia do Utilizador Página 48