Hi,
I presume you have the newer fhss type transmitter also otherwise you cannot use a mix of old tx and new rx as they use different 2.4ghz setups
There is no need to use modulate function on transmitter like the old type of receiver just 3 easy steps
1) turn on transmitter
2) power up car esc
3) press and hold bind button for a few seconds until light goes green
thats it all done
