Ublox NEO-D9S, Быстрый старт

Страница: 6 / 17

NEO-D9S and ZED-F9 configuration
UBX- 22008160 - R02 NEO-D9S configuration Page 6 of 17
C1-Public
2 NEO-D9S configuration
NEO-D9S needs to be configured to receive SPARTN L-band correction data and forward these,
encapsulated in UBX-RXM-PMP messages, to the ZED-F9 receiver via UART2.
2.1 L-band point to multipoint (PMP) configuration
Table 1 lists the NEO-D9S L-band default configuration values , which will vary depending on the
service provider. Once the related values have been obtained from the service provider, they can be
set accordingly with the UBX-CFG-VALSET configuration messages (see the interface description [4]
for further details).
Configuration item Value
CFG-PMP-CENTER_FREQUENCY 1539812500 Hz
CFG-PMP-SEARCH_WINDOW 2200 Hz
CFG-PMP-USE_SERVICE_ID 1 (true)
CFG-PMP-SERVICE_ID 50821
CFG-PMP-DATA_RATE 2400 (B2400) bps
CFG-PMP-USE_DESCRAMBLER 1 (true)
CFG-PMP-DESCRAMBLER_INIT 23560
CFG-PMP-USE_PRESCRAMBLING 0 (false)
CFG-PMP-UNIQUE_WORD 0xe15ae893e15ae893
Table 1: NEO-D9S L-band default configuration values
Section 4 outlines how to obtain the L-band configuration values for the PointPerfect service.
2.2 Interface configuration
Table 2 shows the configuration items needed to configure the UART2 interface of NEO-D9S so that
it can communicate with the ZED-F9.
Configuration item Value
CFG-UART2OUTPROT-UBX 1 (true)
CFG-UART2-BAUDRATE 38400
Table 2: NEO-D9S UART2 configuration items
To facilitate the configuration, examples of the configuration strings for RAM and Flash layers are
shown here:
RAM layer configuration string:
b5 62 06 8a 11 00 00 01 00 00 01 00 53 40 00 96 00 00 01 00 76 10 01 54 ef
Flash layer configuration string:
b5 62 06 8a 11 00 00 04 00 00 01 00 53 40 00 96 00 00 01 00 76 10 01 57 1f
When sending Flash layer configuration strings, the receiver needs to be restarted to apply them in RAM.
The UBX-RXM-PMP message is enabled by default in the output to the NEO-D9S UART2 interface.