ashtech GG Surveyor, Reference Manual

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14 GG Surveyor GPS+GLONASS Reference Manual
position. Power feeds through pin 4 of Ports B and C with the receiver off; radios
and modems will continue to draw power.
Once power is on and the antenna is connected, the receiver acquires satellites within
the field of view of the antenna. As a channel in the receiver locks on to an Satellite,
the two-color LED flashes green between the red power flashes for every channel in
use (i.e., satellites locked).
Communication
After you have the GG Surveyor powered and running, you must send it commands in
order to receive data and change parameters. Specially designed software which runs
on the Husky FS/2 handheld computer can be obtained from Ashtech to perform a
variety specific applications. A personal computer can also be used to communicate
with the receiver. The following procedure describes how to send commands to and
receive information from the GG Surveyor using a personal computer. Many
communications software packages, such as the Ashtech EVALUATE software, allow
you to interface with the GG Surveyor. EVALUATE includes a communications
package that automatically establishes communication with the GG Surveyor
receiver.
1. Connect port A of the serial cable to either COM 1 or COM 2 of your
computer.
2. Run the communication software of your choice. Set the communication
parameters in the software to match the computer and receiver.
The default communication parameters of the GG Surveyor are:
9600 baud, 8 data bits, no parity, one stop bit
When you first establish communication with the GG Surveyor, your
communication interface must use this protocol.
3. Once the correct parameters have been set, type: $PASHQ,PRT and press
<Enter> to query the communication setup of the port and verify that
communication with the receiver is established.
If the software and receiver are set up properly, the receiver responds with
the message:
$PASHR,PRT,A,5
CAUTION
To avoid damage to the receiver, always turn off the receiver before
connecting or disconnecting the DB25 connector.