Specifications

28 Z-Family Technical Reference Manual
Do not try to transmit corrections on the same receiver serial port you are using to set up the receiver
from your PC.
The receiver is set as a base station which transmits RTCM message type 1
continuously. Following a power cycle it automatically starts transmitting these
corrections again (because you have saved the settings with the $PASHS,SAV,Y
command). To change the message type or rate, use the $PASHS,RTC,TYP
command.
Setting Up an RTK Base Station
An RTK base station supports three different types of messages:
• RTCM standard 18 & 19 (plus 3 & 22)
• RTCM standard 20 & 21 (plus 3 & 22)
• Ashtech standard DBN
RTCM 18 & 19
You must have both [B] and [K] options installed on the receiver.
Send the commands listed in Table 3.2 to the receiver to generate RTCM RTK
message types 3,18,19 and 22.
$PASHS,RTC,BAS,x Turn on RTCM corrections on port x
When this command is sent, a base station
automatically sends RTCM message type 1
continuously.
$PASHS,RTC,SPD,9 Set internal bit-rate for corrections to burst
mode.
$PASHS,SAV,Y Save settings
Table 3.2: RTK Base Station Commands
Command Description
$PASHS,RST Reset the receiver to factory defaults
$PASHS,ELM,9 Set the RTK Base mask to nine degrees
$PASHS,POS,ddmm.mmm,d,dddmm.mmm,d,saaaaa.aa Enter the phase center of the antenna if
ANR is OFF or the ground mark if ANR is
ON or CPD.
Table 3.1: Differential Base Station Commands (continued)
Command Description