A discrete real all pass system has a pole at z = 2 30 : it, theref

1.	A discrete real all pass system has a pole at z = 2 30 : it, therefore
A.	has a constant phase response over the zplane: arg \| H(z)\| = constant
B.	is stable only, if it is anticausal
C.	has a constant phase response over the unit circle: arg \| H(e
D.	)\| = constant
Answer» E.

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A discrete real all pass system has a pole at z = 2 30 : it, therefore

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