Specifications

60 Z-Family Techncial Reference Manual
Initialization: $PASHS,CPD,RST
If you wish to reset the carrier phase cycle ambiguities that have been found, send
$PASHS,CPD,RST command. Note that your position accuracy will temporarily
degrade and you should wait until the ambiguities are fixed again before expecting
centimeter accuracy.
Base Position Coordinates Selection: $PASHS,CPD,UBS
If the transmitted base position were entered incorrectly at the base, you may change
this field at the rover to USE ENTERED BASE POS (with $PASHS,CPD,UBS) and
then enter the correct base coordinates via $PASHS,CPD,POS command. The CPD
data link status on response of $PASHQ,CPD or $PASHR,CPD,DLK message will
display the RCVD CORD age as “999 SEC” when the entered page position is used.
If you are using the transmitted coordinates, which is the recommended method, you
can verify the transmitted position by sending $PASHQ,CPD,POS command.
Base Station Elevation Mask: $PASHS,ELM
In the base station, set the elevation mask angle to 5 degrees to ensure the maximum
coverage. In the rover, you can set a different elevation mask angle for position
computation, using $PASHS,PEM command.
Universal RTCM Base Station
With the addition of RTCM type 18 & 19 or 20 & 21 message, a single receiver
RTCM base station can
• generate type 1 or type 2 message for code differential operation for
receivers with RTCM differential options, such as Z-12, RZ Sensor, G-12,
GG-24, SCA-12, receiver, etc.
• generate type 18 & 19 or 20 & 21 message for CPD (RTK) operation in
receiver.
This makes the receiver a universal RTCM reference station. All type of messages
can be mixed to meet the system accuracy requirements and the radio bandwidth
requirements.
Table 4.3 lists the recommended message schedules.