Product Manual

53
Introduction to
Multi-Operating
Mode
The SP90m is a multi-application GNSS receiver, making it
possible to use different operating modes simultaneously.
The limitation to that feature is very simple to understand:
The maximum number of baselines the SP90m can calculate
simultaneously is 3. The capability for the SP90m to support
several operating modes simultaneously is simply derived
from that statement.
NOTE: Working in a Trimble RTX mode does not “consume”
a baseline, which means that the above statement would be
more accurate if we said, “The maximum number of
baselines the SP90m can calculate simultaneously is 3 +
RTX”.
The consequences of this rule are as follows:
• In single-antenna configuration:
– In Hot Standby RTK, you can configure the receiver to
use up to 3 independent correction sources (= 3
baselines), thus making it possible to have up to two
different backup position solutions available in case
the first source of position solution fails.
– In Hot Standby RTK + Relative RTK, you can only set
2 independent correction sources (= 2 baselines), to
have a backup position solutions available in case the
first source of position solution fails. The third baseline
is dedicated to the Relative RTK mode.
• In a two-antenna configuration, the heading mode may be
combined with all of the existing rover modes:
– Autonomous
–RTK
– Hot Standby RTK
– RTK + Relative RTK
– Only Relative RTK
–Dual RTK
– Dual Relative RTK
However, in Hot Standby RTK, there can only be two
independent sets of corrections used (not three because
one baseline is dedicated to computing heading).
Besides, the rover and moving base functions can be run
simultaneously. To make this work, you should first configure
the receiver as a rover, then go to Base Setup and configure the
receiver as a moving base. An RTK position will be computed
if the appropriate corrections data continue to enter the
receiver.