The American Cable Association is calling on the FCC to retain an exemption to allow eligible small cable operators to distribute in analog format "must carry" TV signals received at their headend facilities in digital HD."The record makes plain that in order to avoid harm to small cable systems and consumers, the FCC must extend the HD carriage exemption, and it also demonstrates that the FCC should permanently exempt analog-only systems from the HD must-carry mandate," ACA President and CEO Matthew M. Polka said in a statement.