Just want to add, the +6 volts on pin 2 is only used on the fixed frequency transmitter module but is not required for the JR Synthized module and off brand modules(non-JR).
Pin 1 PPN is 3.3 volts peak to peak and is a positive going pulse 0 to 3.3 volts positive.
FYI Not to get off the subject but those of you installing lipo batterys in transmitters & receivers made for nicad batterys should install a small voltage regulator down stream of the ON - Off switch to power your radio to pervent over stressing your electronics. ( 7.4v down to 6v and 11.1v down to 10v will give you many good years of service,
Last edited by aa180335; 07-22-2015 at 04:22 PM.