Epoch 25 L1/L2 GPS System User Guide 23
General Operation 3
32.3 LED flash patterns
This table lists possible flash patterns and identifies what operating states they
indicate.
Note – N/A beside an LED means that the LED is not relevant to the mode. (The LED may
or may not be on.)
3.3 Logging data
You can log data internally or to a Spectra Precision Recon
®
controller.
33.1 Logging internally
The Epoch 25 GPS receiver logs GPS data internally on 2 MB of internal memory. You
can use the Spectra Precision Data Transfer utility to transfer logged data files to the
office computer. The transferred files are in TO1 format.
C
WARNING – The Epoch 25 GPS receiver allows for a maximum of 512 files on the internal
memory. The filenames must be in 8.3 format, otherwise files copied to the internal
memory may cause data corruption or loss of data when logging.
Data is logged using the current logging settings configured in the receiver. Data files
logged internally are named automatically.
You must use a Spectra Precision Recon controller to begin internal logging, . The
Epoch 25 GPS receiver does not have an internal clock, so you cannot conduct timed
sessions.
Note – When the internal memory is full, the receiver stops logging data, and the
Logging/Memory LED switches off. Existing data files are not overwritten.
Receiver mode Power LED
Blue
Radio LED
Green
Satellite LED
Amber
Receiver OFF OFF OFF OFF
Receiver ON:
Healthy power ON N/A N/A
Tracking <4 SVs ON N/A Fast flash
Tracking >4 SVs ON N/A Slow flash
Receiving valid data packets ON Slow flash N/A
No data packets ON OFF N/A
Receiver in Monitor ON Slow flash ON
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