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I am an old hand at electronics but new to RC servos. I understand I need to input a pulse between 1 and 2 msec, every 20msec or so, to swing the servo from one extreme to the other. I need to be sure that if the pulses stop, the thing stays where it is. It mustn't head back to the centre or to one end. Do the HK servos work like this? My project isn't an RC model - the controller will wake up every hour, do an adjustment if required, then go to sleep again. It would be nice if I can just give it just ONE pulse of the chosen duration then go to sleep. Is that allowed?