RE: Eletronic engine syncronizer - no joke
Additional on the LEDs.
When the sync unit is in the operation mode, with the selector switch at zero, LED one is on to indicate throttle stick position above 20% and the sync unit enabled, when off the tx throttle is less than 20%, sync unit switched out.
LED two flashes at high speed to indicate sync lock, off when out of sync.
LEDs three and four indicate rpm pulse from the two engines, as noted earlier.
Bill.