As mentioned above the total number of multipliers available in the correlator is less than that required for the measurement of all four stokes parameters in all spectral channels for all sidebands of all antennas. Instead ,the correlator is configurable in various ways. Some configurations would sacrifice polarization measurements for improved spectral resolution, while others allow the measurement of all four stokes parameters at the expense of total bandwidth. The most commonly used configurations of the correlator are described in some more detail below.