[evlatests] Aliasing in narrow-BW observations

[Ken Sowinski]

On Wed, 10 Oct 2007, Walter Brisken wrote:
>
> Maybe Ken or someone else knows more than I do about this, but I remember
> seeing that the VLA supports some narrow band modes with the band of
> interest offset from the DC edge of 50 MHz sampled band by the width of
> the filter.  I think these are BW codes 7 and 9 if I'm not mistaken.  If
> such a mode exists, would it be a possible work around for this problem?

BW codes 8 and 9 use a 200 kHz bandbass filter centered
at 300 kHz.  That lies within the range Rick reported
as suffering aliasing.

Ken