Racelogic LabSat 3, Руководство пользователя

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05 - LabSat3 Record and Replay operations in detail
Replay operation
LabSat 3 uses SD card or HDD memory for storage and playback of GNSS data. It is important to note that Class 10 or
higher cards must be used to sustain the transfer speeds required. Racelogic recommend SanDisk Extreme Class 10
cards for best performance.
The 1 TB USB Hard Disk Drive (HDD) supplied contains a selection of pre-recorded scenarios from around the
world. These scenarios can easily be copied to the SD card for replay. The HDD supports either USB2.0 or USB3.0. For
optimum data transfer performance using a PC that supports USB3.0 for file transfer from HDD to SD card is
recommended.
The RF OUT connector is a 50 Ω output which can be connected directly to the antenna input of the GNSS receiver
being tested. The RF OUT connector of LabSat 3 is DC blocked internally so almost any device can be connected to this
port. When a file is selected for replay, the LabSat will configure constellation frequencies and digital channels
automatically before starting replay. If a triple constellation file is selected for replay on a single channel LabSat, all three
constellations will be displayed before replay allowing the user to select one.
During replay, pressing OK will show a live histogram of satellite levels detected by the internal GNSS receiver. The
internal receiver currently only supports GPS and GLONASS constellations. This has no effect on the ability of LabSat 3
to record or replay BeiDou signals. When displayed, the UP/DOWN keys switch between GPS and GLONASS monitor
modes. Please note that when switching between GPS and GLONASS display modes, the internal receiver will take
some time to re-acquire satellite signal levels. In the case of GLONASS signals, it may take over a minute to show the
satellite signal information.
LabSat 3 comes with an internal 31 dB attenuation capability. To increase the attenuation press the up arrow, this will
increase the attenuation by 1 dB. The down arrow will decrease the attenuation level.
https://racelogic.support/03LabSat_GPS_Simulators/LabSat_3/LabSat_3_User_Manual/
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