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Last Updated 1/5/2008 12:56:34 PM


DL1 Tech Specs

Technical Specification

Memory Compact flash type I. Data in FAT16 PC format. Minimum card size 32MB, maximum card size 2GB (limited by FAT16).
GPS Outputs position, speed, position accuracy and speed accuracy every 200ms with no interpolation. GPS tracking loops optimised for applications up to about 4g. tracking of all satellites in view.
GPS Antenna Magnetic base, 3.3v active antenna with SMA connector.
Analogue Inputs 7 external inputs, all 12 bit resolution. 3 inputs are 12v full scale, 4 inputs are 5v full scale. All inputs are protected to twice maximum input voltage. 1 internal analogue input connected to the power supply voltage to measure battery voltage.
Frequency Inputs 4 external frequency inputs with a maximum input frequency >2kHz. Hardware dividers of 4 or 16 to average readings if required. Triggering voltage requires a low input of <1v and a high input of >4v and 15v maximum.
Lap Beacon Input Triggering voltage requires a low input of <1v and a high input of >4v and 15v maximum.
Start Sample Input Input requires grounding to start sampling and again to stop sampling.
Sample Status Output Open collector output with a maximum current of 50mA.
Power Supply Requirements 12v nominal input, minimum of 10v, maximum of 15v. Current consumption of about 180mA including GPS, dependant on compact flash card size +5v Reference Out Maximum current draw 100mA, tolerance 1%.
Ignition In Signal (High Level) Triggered by fast voltage transients. Can be connected directly to the low tension side of the ignition coil, or capacitively coupled to the high-tension side.
Ignition In Signal (Low Level) Triggering voltage requires a low input of <1v and a high input of >4v and 15v maximum. Suitable for connection directly to most ECU tacho outputs. Maximum input frequency >300Hz.
Case Construction Extruded aluminium anodised black, nominal case thickness 2mm. End panels CNC cut carbon fibre.
Connector Type 3.5mm pitch screw connectors
Main Processor 24MHz RISC with embedded flash program memory
GPS Serial Port User configurable for baud rate and messages. Factory set at 4800 baud and outputting NMEA messages of $GPRMC and $GPGGA,
DL1 Serial Ports Port 1 fixed at a baud rate of 115200 baud. Whilst logging outputs all data from all channels at 100Hz. Also used for re flashing, diagnostics and configuration. Port 2 used for inputting RS232 data for storage during a run, from an ECU, OBDII adapter or any other compatible device.
Accelerometers 2 axis, precision digital output. Guaranteed 2g minimum full scale on both axes. Resolution of 0.005g. Optional 10g sensor available as a factory option.
Vibration Factory tested at 25g, 50Hz sinusoid for 5 minutes (without compact flash card inserted).
Temperature Factory tested from -20oC to 70oC
 

Identifying Your Unit

Several different versions of the DL1 have been released. For information on identifying your unit, please click on the following link: