Operating the DL1 FD

Description of the lights on the DL1 FD

Front
	Status Light	This light flashes to indicate that the DL1 FD's processor is operating normally and is ready to log data. In an error situation this LED blinks a number of times followed by an off period, as shown below. 2 SD Card detection error 3 SD card write error 4 SD card read error 5 FAT file system initialize error 6 Over voltage error 7 Configuration error 8 Firmware error 9 License error 10 Serial number error 11 Calibration error 12 Board test error
	GPS Lock Light	This light will be on when the GPS receiver has a lock. Details about mounting the GPS antenna are here.
	Power On	This light illuminates when the DL1 FD is connected to a valid power supply. Advice about connecting a power supply is here.
	Logging	This light illuminates when the DL1 FD is actually logging data to the SD card. When this light is illuminated YOU MUST NOT TURN THE DL1 FD OFF, OR EJECT THE SD CARD!
	SD card Slot	This is the slot for the SD or SDHC card.

"WARNING": To avoid any possible damage to the car paintwork, please take care when mounting magnetic GPS antennas. In particular make sure that there are no dust or grit under the antenna. In some cases it maybe required to add additional protection to the paintwork prior to mounting the antenna to avoid damage.

Sampling Data with the DL1 FD

If used, connect a GPS antenna to the rear of the DL1 FD.
Connect the DL1 FD to a valid power supply. After a short pause the power light on the front of the unit will come on and the status light will start flashing rapidly.
Insert a freshly formatted SD card into the slot, the status light will stop flashing for a second or 2 then start again when the DL1 FD is ready to log data.
Press the "Start/Stop Logging" button on the front of the DL1 FD, the "Logging" light will come on indicating that the DL1 FD is writing data to the SD card.

To stop data logging:

Press the Start/Stop Logging button on the front of the DL1 FD; the "Logging" light will go out.
ONCE THE LOGGING LIGHT HAS GONE OUT, eject the SD card from it's slot. Power can now be disconnected if required.
Put the SD card in a suitable reader and check a file has been written to it.

Advanced operation

You can set the DL1 FD to automatically start and stop logging based on external inputs or on a timed basis. For more information on how to do this, see the DL1 FD/DL2 FD Configuration software section.

Real Time Output

Practically the whole time the DL1 FD is powered up, it is outputting data in real time to the external serial port. This can be used for a number of applications including monitoring the data on a PC or streaming to a dashboard or video logger.