ORIGINAL: goirish
Here is a picture of the tx.
G'day Mate,
See manual attached, over here it's called a Quattro, looks the same as yours, 4 channel & it is FM PPM.
Be aware, FM PPM is the base system, as they got more advanced they had the option of PCM.
So when it comes to JR, usually, if it's FM, it will be PPM, with the option, if available, of PCM.
Cheers