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RoyalTek GPS Receiver REB-2000/REB-12R REV-2000 Operational Manual
21
Mode control – Message I.D .136
Table 22 contains the input values for the
following example: 3D Mode = Always , Alt
Constraining = Yes , Degraded Mode –
clock then direction , TBD = 1 , DR Mode
= Yes , Altitude = 0, Alt Hold Mode = Auto,
Alt Source = Last Computed , Coast Time
Out = 20, Degraded Time Out = 5, DR
Time Out = 2, Track Smoothing = Yes
Example:
A0A2000W – Start Sequence and Payload
Length
88010101010100000002140501 –
Payload
00A9B0B3 – Message Checksum and
End Sequence
Table 22 Mode Control
Binary(Hex)
Name
Bytes
Scale Example
Units
Description
Message ID 1 88 ASCII 136
3D Mode 1 01 1 (always true=1)
Alt Constraint 1 01 YES = 1,NO = 0
Degraded Mode 1 01 See Table C-7
TBD 1 01 Reserved
DR Mode 1 01 YES = 1,NO = 0
Altitude 2 0000 Meters Range –1,000 to 10,000
Alt Hold Mode 1 00 Auto = 0,Always=1,Disable=2
Alt Source 1 02 Last Computed=0,Fixed to=1
Coast Time Out 1 14 Seconds 0 to 120
Degraded Time
Out
1 05 Seconds 0 to 120
Dr Time Out 1 01 Seconds 0 to 120
Track Smoothing 1 01 YES = 1,NO = 0
Payload Length:14 bytes
Table 23 Degraded Mode Byte Value
Byte Value Description
0 Use Direction then Clock Hold
1 Use Clock then Direction Hold
2 Direction(Curb)Hold Only
3 Clock(Time)Hold Only
4 Disable Degraded Modes
DOP Mask Control – Message I.D. 137
Table 24 contains the input values for the
following example:
Auto Pdop/Hdop, Gdop =
8(default),Pdop=8,Hdop=8
Example:
A0A20005 – Start Sequence and Payload
Length
8900080808 – Payload
00A1B0B3 – Message Checksum and
End Sequence