Variable isi transmission channel apparatus

A variable intersymbol interference (“ISI”) transmission channel apparatus comprising:

• a conductor-strip-exposed transmission channel means (A) including a conductor strip (2) exposed and extended on a top surface of a dielectric substrate (1);
• a transmission loss generating means (B) made up of a transmission loss generating member (6) (16) (26) (36) having an undersurface facing the top surface of the conductor strip (2) of the conductor-strip-exposed transmission channel means (A) to generate, depending on a facing area of the undersurface, an amount of loss to set an ISI amount for the high speed serial data transmission by a high-frequency signal on the conductor strip (2);
• a transmission loss generating member driving means (C) that variably sets the ISI amount based at least in part on a position of the transmission loss generating member (6) (16) (26) (36) driven above the conductor strip (2) along a linear path crossing over the conductor-strip-exposed transmission channel means (A) increasing and decreasing a facing area of the undersurface of the transmission loss generating member;
• and
• a sliding support sheet (5) made of a thin insulating material having a low-friction-coefficient and low dielectric constant interposed between the conductor strip (2) of the transmission channel means (A) and the transmission loss generating member (6) (16) (26) (36) of the transmission loss generating means (B) in a range covering the conductor strip (2).