Racelogic USER GUIDE Instrukcja Obsługi Pobierz pdf (Strona 16)

Revision 13 Page 16 of 35

NB: Satellite Lock

There is no ‘acquisition time’ as such when recording data with the LabSat 2 as it is recording the complete RF signal rather than tracking individual satellites.

However, when recording data, we recommend that you allow around 5 - 10 minutes of stationary recording in an open location with good unrestricted

visibility of the entire sky before moving off. In this way any GNSS engine having the LabSat scenario played back to it will have plenty of time to lock onto

satellites and begin storing almanac data.

NB: LabSat Data Rate

LabSat records RF data over high speed USB at a data rate in excess of 2MB/sec, This means the data files created by LabSat become large very quickly. It

is important to ensure that there is sufficient space on the computer or USB hard drive where the recorded data file is to be stored.

Recording Data with a Brake Trigger Input or other event

The AD2 connection on the front panel of the LabSat carries a digital input which can be used to mark an event such as a brake trigger event. Contact

Racelogic for details of hand-held or pedal mounted switches that can be used with LabSat to record events.

When a change occurs on the digital input during a record session, a marker is placed in the recorded GPS data. Two marker types are used, one to signal a

negative transition on the digital input and the other to signal a positive transition.

During replay of GPS data, the ‘digital 1’ output found on connector DOUT pin2 will re-create the events that happened on the digital input pin as the GPS

data was recorded.

The digital input and digital output signals are also connected to the SER connector on the LabSat to allow connection of the optional interface modules. See

section Interface Modules for more details.

Note: the digital input on connector AD2 is also connected to the SER connector for use with the signal Interface Modules. Therefore, it is not possible to use

the AD2 connector digital input when using one of the Interface Modules.

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