ACSIS can use 250 MHz or 1000 MHz sub-bands.
In the case of HARP these can either be “chained”
for higher resolution or overlapped as a
400 MHz or 1600 MHz “hybrid” band.
Other receivers can use one of these “hybrid” modes
without a loss of resolution.
Please see the
ACSIS spectrometer information
for more information, including the resolution
constraints when observing multiple simultaneous
Please select “Other” to enter
a specific resolution in MHz or km/s.
If a resolution is entered in terms of frequency,
it corresponds to the sky frequency.