Hi, ultimately when the ignition is turned I would like the antenna to be always extended. Currently it extends only when listening to the radio and retracts when switching to CD. As I hop between CD & Radio all the time, this becomes annoying. Does the radio maintain a constant 12v signal to the antenna when it wants it up OR does it send a 12v blip? If it's constant, then using the switched 12v line would achieve my aim wouldn't it? If it sends a blip to extend it and a blip to retract it, could I perhaps use the radio's amplifier turn-on lead to make it do what I want? Thanks.

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Fronts: Focal HC130 (5 1/4 inch) Co-axials.
Rears: Nil.
Headunit: Eclipse CD3403.
Amplifier: Audison SrX5