14 Nov 04IEEE802.3aq Channel model ad hoc Task 2: Time variation and modal noise 11 5) Quasi-static impulse response measurements 3 SMF + MMF shaker, vs SMF (polarisation effect) only Causal to anti-causal evolution in 5mm shaker movement –Similar rate of IPR evolution for SMF shaker only (polarisation effect only) –Polarization effect explores subset of IPRs explored with MMF + SMF shaker Following GR-63-CORE, equivalent to 10Hz vibration amplitude at 1g SMF + MMF shakers SMF shaker only 5mm