Step 2. Is The Radio Connected To The Gps Receiver; Step 3. Is The Radio Connected To The Correct Port - ashtech Z-Xtreme System Manual

Receiving data
Go to step 2 below.

Step 2. Is the radio connected to the GPS receiver?

The rover radio must send the base satellite data it receives to the rover GPS receiver
in order for the rover receiver to compute a position. For an external radio, this
requires a cable connection between the radio and receiver. For an internal radio,
this connection is made internally to the receiver, therefore no action is required of the
user.
Radio not connected
Connect the rover radio to the GPS receiver.
On the back panel of the Z-Xtreme, connect the radio cable to RS232 port B.
If using the Pacific Crest UHF/VHF or Ashtech SSRadio, connect the radio
cable to the RS232 connector labeled DATA/PWR or SERIAL.
Radio connected
Ensure proper connection. Ensure that the radio cable is connected to
RS232 port B on the back panel of the receiver. Ensure the connections at
the receiver and the radio are fully seated.
Go to step 3 if the problem is not yet resolved.

Step 3. Is the radio connected to the correct port?

When setting up the rover GPS receiver, one of the parameters is the port through
which the rover receiver should expect data from the radio. If the parameter setting
does not match the port to which the radio is connected, the rover receiver will not find
the base data. Use the field application software to determine which port has been
set in the rover to receive base data. Then look on the back of the GPS receiver to
determine if the radio is indeed connected to this port. Its recommended that you
select a port to which the radio will always be connected and the port parameter be
always set to. Port B is recommended for this purpose.
When using an internal radio, you have no choice of which port to connect the radio.
The radio is automatically connected to port D internally to the radio. Therefore, the
port for receiving base data should be set to D.
84 Real-Time Kinematic Surveying