Digital servo input requirements

A HiTec HS-5645MG servo (hitecrcd.com/products/digital/digital-sport/hs-5645mg.html) is being connected to a Cross-the-Road Robot Control Module (crosstheroadelectronics.com/Cross_link.html).

The RCM output is: Ground / +5 VDC / PWM. The PWM signal is 1 to 2 milliseconds at 100 Hz (1.5 mSec = STOP). The servo does not respond to control commands. The PWM signal is functioning.

I don’t have any experience with digital servos. What are the input requirements for this servo?

That servo functions just like a normal servo; a 5V pulse between 500us to 2500us repeated every ~20ms. Sounds like it might be the code.