C93-M8E - User Guide
UBX-15031067 - R03
Contents
Page 18 of 21
Early Production Information
The C93-M8E does not meet the TTFF specification
Make sure the C93-M8E has a good sky view. An obstructed view leads to prolonged startup times. In
a well-designed system, the average of the C/No ratio of high elevation satellites should be in the
range of 40 dBHz to about 50 dBHz. With a standard off-the-shelf active antenna, 47 dBHz should
easily be achieved. Low C/No values lead to a prolonged startup time.
C93-M8E does not preserve the configuration in case of removed power
u-blox M8 GNSS technology uses a slightly different concept than most other GNSS receivers do.
Settings are initially stored to volatile memory. In order to save them permanently, sending a second
command is required. This allows testing the new settings and reverting to the old settings by
resetting the receiver if the new settings aren’t good. This provides safety, as it is no longer possible
to accidentally program a bad configuration (e.g. disabling the main communication port).
