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Load only the channels between the First and Last defined by Min Max and Type. Type can be CHANNEL, VELOCITY or FREQUENCY. If the Data cube has no Frequency/Velocity axis, only CHANNEL is allowed.
For type CHANNEL, Min and Max indicate offsets from Channel 1 and Channel Nchan (the number of channels in the data set). Thus Max can be negative: it then indicates Last = Nchan-Max. Also Min=0 and Max=0 implies loading all the channels.
The /RANGE option is not allowed for FITS files.
For UV tables with more than 1 Stokes parameter, which are **NOT** fully supported by IMAGER, the meaning of "channel" is ambiguous.