18.32.3 /FREQUENCY

[CLEAN\]UV_FILTER [/RESET] [/ZERO] /FREQUENCY F1 [... [Fn]] [/WIDTH Width]

Specify around which frequencies the line emission should be filtered. Frequencies F1 to Fn must be in MHz. The full width of the filtering window around every frequency can be set by option /WIDTH. The optional argument TYPE indicates the type of width: FREQUENCY (in MHz), VELOCITY (in km/s) or CHANNEL (no unit), the default being FREQUENCY. The default width is the current channel width.

Tip: it can be convenient to have a list of SIC variables containing the frequencies of the most intense spectral lines, e.g. HCO10 = 89188.52