Microchip Technology GPS-2700, User Manual

Page: 35 / 77

SCPI-Control Quick Start Instructions
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2020 Microchip Technology Inc. DS50003016A-page 35
GPS-2700 with firmware revision 0.74 and later and uBlox 8 GNSS receiver is capable
of simultaneously receiving up to three concurrent GNSS systems and tracking up to
24 satellites at one time. When multiple GNSS systems are enabled in Section 3.3.31
and talker ID mode is configured to GN in Section 3.3.32, multiple GSV sentences with
different talker ID listed in Table 3.1 will be outputted.
For example, if GPS:SYST:SEL GPS SBAS GAL GLO command is sent and talker ID
mode is GN, this command will have the following output format:
$GPGSV,x,x,ss,nn,ee,aaa,ss,...*[checksum]
$GLGSV,x,x,ss,nn,ee,aaa,ss,...*[checksum]
$GAGSV,x,x,ss,nnn,ee,aaa,ss,...*[checksum]
GPS-2700 with firmware revision 0.75 and later and uBlox 8 GNSS receiver adds sup-
port for switching the talker ID mode to GP for GSV command where only $GPGSV
(i.e., no $GLGSV, $GAGSV, or $GBGSV) string will be outputted for GPS, SBAS, and
QZSS. See Section 3.3.33 for more details on merging satellite information for other
GNSS systems in $GPGSV sentence.
TABLE 3-1: PRN NUMBERING SCHEME FOR GNSS SYSTEMS
GNSS Type SV Range
GPGSV PRN Vehicle
Numbering
Talker ID
GPS G1-G32 1-32 GP
SBAS S120-S158 33-64, 152-158 GP
Galileo E1-E36 301-336 GA
BeiDou B1-B37 401-437 BG
IMES I1-I10 173-182 GP
QZSS Q1-Q5 193-197 GP
GLONASS R1-R32, R? 65-96, 0 GL
3.3.11 GPS:PASHR <int> [0,255]
The PASHR command alongside the GPZDA command will give all relevant parame-
ters such as time, date, position, velocity, direction, altitude, quality of fix, and more. As
an example, the String has the following data format:
$PASHR,POS,0,7,202939.00,3716.28369,N,12157.43457,W,00087.40,????,070.01,
000.31,-000.10,05.6,03.5,04.3,00.0,DD00*32
Please note that the length of the string is fixed at 115 characters plus the two binary
0x0d, 0x0a termination characters.
$PASHR,POS,0,aa,bbbbbb.00,cccc.ccccc,d,eeeee.eeeee,f,ggggg.gg,hhhh,iii.ii,jjj.
jj,kkkk.kk,ll.l,mm.m,nn.n,00.0,p.pp,*[checksum]
Where:
aa: Number of Sats
bbbbbb.00: Time of Day UTC
cccc.ccccc,d: Latitude,S/N
eeee.eeeee,f: Longitude,W/E
ggggg.gg: Antenna Height in meters
hhhh: Four fixed ‘?’ symbols
iii.ii: Course Over Ground
jjj.jj: Speed in Knots
kkkk.k: Vertical Velocity in meters/s
ll.l: PDOP