The first observations using the S2 baseband system for demonstration purposes were made of the Vela pulsar with the 64-m diameter telescope at Parkes, at 6-cm wavelength at left-circular polarization on September 30, 1995. The signal at the telescope was converted to baseband with a 16 MHz bandwidth, sampled at the Nyquist rate with 2-bit quantization, and written to an S2 recorder. At the processing center at ISTS/York University, the data were transferred to a workstation disk via the S2-TCI at the full S2 rate of 16 MBytes/s. The integrated profile of the pulsar is shown in Fig. 5.
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