Rainbow Electronics ATR0630 - Manual (Page 13)

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4920A–GPS–01/06
ATR0630 [Preliminary]
3.3.2 Sensitivity Settings
3.4 Serial I/O Configuration
The ATR0630 features a two-stage I/O-message and protocol-selection procedure for the two
available serial ports. At the first stage, a certain protocol can be enabled or disabled for a given
USART port or the USB port. Selectable protocols are RTCM, NMEA and UBX. At the second
stage, messages can be enabled or disabled for each enabled protocol on each port. In all con-
figurations described below, all protocols are enabled on all ports, but output messages are
enabled in a way that ports appear to communicate at only one protocol. However, each port will
accept any input message in any of the three implemented protocols
Both USART ports accept input messages in all three supported protocols (NMEA, RTCM and
UBX) at the configured baud rate. Input messages of all three protocols can be arbitrarily mixed.
Response to a query input message will always use the same protocol as the query input mes-
sage. The USB port does only accept NMEA and UBX as input protocol by default. RTCM can
be enabled via protocol messages on demand.
In Auto mode, no output message is sent out by default, but all input messages are accepted at
any supported baud rate. Again, USB is restricted to only NMEA and UBX protocols. Response
to query input commands will be given by the same protocol and baud rate as it was used for the
query command. Using the respective configuration commands, periodic output messages can
be enabled.
Table 3-5. GPS Sensitivity Settings
GPSMODE3
(Fixed PU)
GPSMODE2
(Reset = PU) Description
0 0 Auto mode
0 1 Fast mode
1 0 Normal mode (Default ROM value)
1 1 High sensitivity
Table 3-6. Serial I/O Configuration
GPSMODE12
(Reset = PU)
GPSMODE6
(Reset = PU)
GPSMODE5
(Reset = PD)
USART1/USB
(Output Protocol/
Baud Rate (kBaud))
USART2
(Output Protocol/
Baud Rate (kBaud)) Messages Information Messages
0 0 0 UBX/57.6 NMEA/19.2 High User, Notice, Warning, Error
0 0 1 UBX/38.4 NMEA/9.6 Medium User, Notice, Warning, Error
0 1 0 UBX/19.2 NMEA/4.8 Low User, Notice, Warning, Error
0 1 1 –/Auto –/Auto Off None
1 0 0 NMEA/19.2 UBX/57.6 High User, Notice, Warning, Error
1 0 1 NMEA/4.8 UBX/19.2 Low User, Notice, Warning, Error
1 1 0 NMEA/9.6 UBX/38.4 Medium User, Notice, Warning, Error
1 1 1 UBX/115.2 NMEA/19.2 Debug All