Jackson Labs RSR GNSS Transcoder, User Manual

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© 2017 Jackson Labs Technologies, Inc. 89
RSR GNSS Transcoder™ User Manual
In this Automatic mode, the unit will configure the internal GNSS receiver based on the
simulated/transcoded vehicle-velocity:
Please note that in order to switch from the Automotive mode into the first Airborne (1g) mode, both
a vehicle velocity greater than 60 knots as well as a climb/descent rate greater than 400 feet per
minute are required. Alternatively, a vehicle velocity of greater than 100 Knots will also initiate a
switch into airborne-1g mode.
Without an appropriate climb/descent, the unit will remain in Automotive mode.
The following command returns the setting of the GNSS dynamic model:
INTGPS:DYNAMic:MODE?
The actual state chosen by the firmware for the internal GNSS receiver based on vehicle velocity can
be obtained with the command:
INTGPS:DYNAMic:STATe?
A value between 0 and 7 is then returned depending on simulated/transcoded vehicle dynamics.
Settings will be applied immediately to the internal GNSS receiver, and are stored in Non Volatile
memory.
4.11.16 INTGPS:DYNAMic:STATe?
This query returns the actual state of the dynamic model, chosen by the firmware to be applied to the
internal GNSS receiver depending on simulated/transcoded vehicle velocity. It returns a value
between 0 and 7, which correspond to one of the dynamic models defined in the Table in section
4.10.16 .
This state can be different from the user-selected Dynamic model mode if the dynamic mode is set to
8 (Automatic mode), the state will reflect the dynamic model being applied to the internal GNSS
receiver depending on simulated/transcoded vehicle dynamics
4.11.17 INTGPS:REFerence:PULse:SAWtooth?
This command returns the momentary sawtooth correction factor that the internal monitoring GNSS
receiver indicated.
4.11.18 INTGPS:RESET ONCE
Issues a reset to the internal GNSS receiver. This can be helpful when changing amplitude settings on
the simulation, since the internal GNSS receiver measures the RF outputs’s C/No right after reset,
and adjusts its internal antenna amplifier gains accordingly. It takes approximately 1 minute for
locking to commence after a GNSS receiver reset, as indicated by the internal GNSS 1PPS LED.