You can find a wealth of info on the IFI FAQ for the Victors here...
http://www.ifirobotics.com/forum/vie...4742c7 8d25be
From that page...
Here are the required input control signal characteristics of the PWM input signal for the Victor and the PWM Outputs for our RC units:
Period for the Mini RC PWM Output: 17.0 ms.
Period for the FRC Robot Controller PWM Output: 26.2 ms.
Maximun Rate: 120 Hz.
Pulse width: 1 - 2 ms
As the positive pulse width varies from about 1 ms to 2 ms, the Victor will range from Full Reverse to Full Forward. The Victor should be in Neutral at about a 1.5 ms pulse width.