Status of Receiver Upgrades

The planned availability of the various bands on the EVLA is shown in Figure 1. No EVLA antennas have the VLA Ku (U) band (15 GHz) frequency available; installation of those on EVLA antennas will begin in 2010. Note that until the VLA correlator is turned off, due to hardware constraints the maximum number of available antennas will gradually drop to 22. Further band-specific details (as of June, 2009) are shown in Figures 2 and 3.
Figure 1 - An overview of EVLA band availability as a function of time. The L- and C-band curves reflect the planned installation of Ortho Mode Transducers (OMTs), which will enable good polarization behavior outside the 'old' L and C band ranges (1.25 - 1.75 GHz for L-band, and 4.5 - 5.0 GHz for C-band).



Figure 2 - EVLA L, S, C, and X band availability as a function of time.



Figure 3 - EVLA Ku, K, Ka, and Q band availability as a function of time.