Most servos have 3 leads, negative power supply, positive power supply and a control signal. The control signal is a pulse of 5 volts with a constant Frame rate F and a pulse width P.
Typical frame rates are 20mS, typically values of P vary from 1 to 2 mS.
Dimensions 19.5mm x 40mm x 40mm Weight 40 grams (1.5 oz) Torque 0.3 Nm (42 oz/in) Transit Speed .22 seconds for 60 degrees Travel 90 degrees
Connections red Positive power supply 4.8-6 volts black Negative power supply white Control signal
P = 2.5 mS Min Ph= 300 mS Max Ph = 2.2 mS
Device is linear between P max and P min. Thus target angle q (in degrees) given by P= 0.01 q +0.3 mS
Dimensions 1.6"x.8"x1.4" Weight 40 grams (1.5 oz) Torque 0.27 Nm (38 oz/in) Transit Speed .21 seconds for 60 degrees Travel 90 degrees
Probably the same as the Futaba
The computer applications journal Oct 1994 No 51, pg 16