Spektrum SPM1200 - Manual (Page 8)

Note: If desired, the antenna can be shortened (cut)
to exactly 3.6" with negligible loss of range and in some
applications the short 3.6" length will make installation easier.
3. Connect the servo and ESC
leads per the chart below. The
connections are compatible with
Airtronics Z, JR®, Futaba, Hitec,
and KO servos.
Installing the Receiver
(continued)
8