Your transmitter should have the FASST programming in it. You can access the FASST programming only when you have the TM-14 FASST module installed. If you have a 72 MHz or other module installed, then you cannot access the FASST setting. There are no updates required for PCM operation, you just select the type of modulation in the frequency section of the Linkage Menu. "PCM G3" is the PCM2048 modulation.