Thales Z-Max Operation And Application Manual page 160

The Epoch Counter counts the time that each point is occupied in the
kinematic survey. When the Site ID is entered, the epoch counter will
automatically decrement with each epoch of GPS measurements recorded.
When the counter gets to 0, an audible alarm is generated to indiate that data
collection at that point is complete, and the Site ID is automatically set to
question marks. Move to the next point, enter the new Site ID, and the Epoch
Counter resets and again begins to decrement.
The Min SV parameter is the minimum number of locked satellites, and this
parameter must be set to 4 or higher. When the number of satellites locked
drops below this number, an alarm is generated to indicate that you must re-
initialize the receiver (see Kinematic Survey Execution on page 138).
The recording interval, epoch counter, and Min SV can be set using the Front
Panel User Interface or field application software running on the handheld
computer. Refer to the Operations chapter for specific steps on how to set
these parameters through the Front Panel User Interface. Refer to the user
manual of the field application software for more details on setup and
execution of post-processed kinematic data collection.
7. Verify operation
Perform the following observations to determine if the rover system is
functioning properly:
a. Determine if the GPS receiver is observing satellites. This can be
accomplished by observing the SV/Power LED on the front panel of the
receiver GPS Receiver Module. It should blink green 4 or more times
between each red power blink.
b.Verify that data is being recorded. This can be accomplished by
observing the Data Log LED on the front panel of the receiver GPS
Receiver Module. It should blink green once at the frequency of the
data recording interval.
Survey Preparation and Execution 137