Continuous frequency coverage is not necessary but we must be able to image the entire primary beam. Again, we would like to image the entire primary beam. To take full advantage of the upgrade, we would like the correlator to permit imaging the whole primary beam in the A configuration or beyond between 1.3cm and 90cm, without bandwidth or time-delay smearing. This might be halved by using longer averaging times and fewer channels on the short baselines, but not much further than that. The E configuration is needed mainly to image diffuse low-level emission at high frequencies.
Snapshots are less important than long, sensitive observations.
The new configurations are interesting but not as crucial.