Gps Troubleshooting - Bosch DISBLAY DDU 7 Manual

17.5
Bosch Motorsport
Measurement label
gps_speed
gps_direction
gps_declination
gps_year
gps_mon
gps_day
gps_hour
gps_min
gps_sec
gps_hsec
gps_smask
gps_sig
gps_fix
These measurement labels are arrays, where the indexed element points to the
same satellite.
(E.g. gps_info_satsigstrength[3] tells the receiving signal strength of satellite 3.
Satellite 3 has the SAT‐ID given in gps_info_satid[3])
Measurement label
gps_info_satid[ ]
gps_info_satinuse[ ]
gps_info_satelevation[ ] Elevation in degrees, 90 maximum
gps_info_satazimuth[ ] Azimuth, degrees from true north, 000 to 359
gps_info_satsig‐
strength[ ]

GPS troubleshooting

Electrical
Is the transmitter signal of the GPS sensor connected to the receiver pin of serial
interface 2 of the DDU 7?
Is the GPS sensor powered up?
Does the GPS sensor deliver RS232 signal levels?
Is the sensor connected to the „sensor ground" of the device?
DDU 7 Manual
Function
Speed over the ground in kilometers/hour
Track angle in degrees
Magnetic variation degrees (Easterly var. subtracts from
true course)
Years since 1900
Months since January ‐ [0,11]
Day of the month ‐ [1,31]
Hours since midnight ‐ [0,23]
Minutes after the hour ‐ [0,59]
Seconds after the minute ‐ [0,59]
Hundredth part of second ‐ [0,99]
Bit mask over received NMEA sentences (Bit 0 = GGA,
Bit 1 = GSA, Bit 2 =GSV, Bit 3 = RMC, Bit 4 =VTG) within
last second.
GPS quality indicator (0 = Invalid; 1 = Fix; 2 = Differen‐
tial, 3 = Sensitive)
Operating mode, used for navigation (1 = Fix not avail‐
able; 2 = 2D; 3 = 3D)
Function
Satellite PRN number
Used in position fix
Signal, 00‐99 dB
GPS Sensor | 17
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