There are 1 or 2 channels available for external digital data capture, depending on the system variant and the options purchased with the LabSat unit. Recorded digital channel data is synchronized to each sample of recorded RF data; the maximum input frequency for each channel is 1 MHz. To record 2 digital channels, at least 2 RF channels must be selected or 1 single channel with 2-bit quantisation.
The Digital menu allows CH1 or CH2 (subject to LabSat variant) to be configured to record any of the following parameters:-
| Function | Description | Option or Standard |
|---|---|---|
| 1PPS | This is the 1 Pulse Per Second (1PPS) output from the internal GNSS monitor and will become active once the internal GNSS monitor has a position fix. If using battery power with the power-save option enabled, the GNSS monitor will power-down approximately 30 seconds into the recording and will, therefore, not be present in the recorded data. During replay, the recorded 1PPS signal will be output on pin 2 (DIGO) on the Expansion Connector. | Standard |
| CAN | CAN 1 and CAN 2 on the expansion connector (RLACS202) will be recorded on channel 1 & 2 of the LabSat 3. Refer to the CAN BUS page for more details. | Option on Single constellation variant |
| RS232 | This will record an RS232 level signal input on pin 18 of the Expansion Connector. During replay, pin 17 of the expansion connector will output the recorded data at RS232 level. Because the RS232 signal is digitized directly, it is not necessary to configure baud rate. | Option on Single constellation variant |
| DIGI | Will record the digital state of pin 3 of the expansion connector. During replay, the signal will be re-created on pin 2 (DIGO) of the expansion connector. Refer to the Expansion Connector documentation for more details. | Option on Single constellation variant |
RS323 NOTE
NMEA data from LabSat 3 is also broadcast on Pin 17 of the expansion port (RS232 pin) when not assigned for RS232 recording/replay.
This is also present on LabSat 3 units that do not contain valid RS232 licences, allowing you to draw the NMEA from the expansion port alongside other signals, such as 1PPS.
Contact Racelogic or your LabSat distributor to purchase upgrade options.