Unfortunately, that is not a feature of the EMS-D10 - only the single (displayed) RPM is recorded in the datalog and transmitted in the serial data stream.
The EMS-D10 has a single RPM input, but auto-switches between Pin 32 (Left) and Pin 33 (Right) depending on which pin sees pulses first. If pulses are lost on the pin currently selected by the EMS-D10, it automatically switches to the other pin. Thus, you won't see any break in RPM (assuming both sources of tach signal on Pins 32 and 33 are functioning).
I recently installed an EMS D-10 and found it a little difficult to look back in my datalogs and identify where my "mag-checks" were occurring. It would be helpful to have a record of the RPM being recorded on each input.
