Radial velocity measurements of a group of Ap stars were obtained in May and December 1987 using a Fabry-Perot interferometric stellar oscillation spectrometer that has been improved to enable the instrument to be referenced to the Cd blue line. Observations of the rapidly oscillating Ap stars 33 Lib and HR 1217 were analyzed in order to search for radial velocity variations corresponding to the photometric periods found in these stars. The radial velocity and photometric data sets have been reduced with the aid of a weighted sine wave fitting routine. For HR 1217, a peak at 2.72 mHz and an amplitude of about 240 m/s are found.