SET SUBBANDS

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SET SUBBANDS

            CLIC\SET SUBBANDS n1 n2 ...  [/WINDOW f1 l1 f2 l2 ...]
            CLIC\SET SUBBANDS LINE|CONT
            CLIC\SET SUBBANDS ALL
            CLIC\SET SUBBANDS EACH
            CLIC\SET SUBBANDS HOR|VER
            CLIC\SET SUBBANDS Q1|Q2|Q3|Q4
            CLIC\SET SUBBANDS NBC1|NBC2

        *** THIS COMMAND IS OBSOLETE ***

        Selects  the  subbands for which data will be displayed by command PLOT.
        Valid codes are continuum subbands numbers (C01, C02, ...  C08) or  line
        subbands  numbers (L01, L02, ... L08). These are logical numbers, so one
        should select e.g. L01 to L04 if four correlator units were used,  inde-
        pendentely  from  the  physical units actually used. This is a classical
        trap, especially with the old receiver system (<2007): if e.g.  units  1
        to  5 were used on Receiver 1 and units 6 to 8 on Receiver 2, the corre-
        sponding subbands will be L01 to L05 for the Receiver 1 scan, and L01 to
        L03 for the Receiver 2 scan.

        Subbands  may  be  grouped  by typing e.g. "SET SUBBANDS n1 to n2 and n3
        n4". Here, two quantities will be plotted. The first one is  either  the
        average of subbands n1 to n2 and n3 (in time mode), or the concatenation
        of spectral data from subbands n1 to n2 and n3 (in spectral  mode).  The
        second quantity plotted is subband n4.

        SET  SUBBANDS LINE|CONT will switch all subbands to their line/continuum
        counterpart, e.g. L01 to L04 will be changed to C01 to C04 by SET  SUBB-
        BANDS CONT. Done by SET X I_F

        A number of usefule shortenings are available:

          -  SET  SUBBANDS ALL will automatically select all the subbands in the
            first scan of the current index, for each command accessing the  da-
            ta.  The subbands are concatenated (equivalent to e.g.  SET SUBBANDS
            L01 to L06).

          - SET SUBBANDS EACH will automatically select all the subbands in  the
            first  scan of the current index, for each command accessing the da-
            ta. The subband are NOT concatenated (equivalent to e.g.   SET  SUB-
            BANDS L01 L02 L03 L04 L05 L06).

          - SET SUBBANDS HOR|VER will automatically select (in the first scan of
            the current index) the subbands connected to the horizontal or  ver-
            tical polarization channel (if any). The subbands are concatenated.

          -  SET  SUBBANDS  Q1|Q2|Q3|Q4  will automatically select (in the first
            scan of the current index) the subbands connected  to  the  selected
            quarter (if any). The subbands are concatenated.

          -  SET SUBBANDS NBC1|NBC2 will automatically select (in the first scan
            of the current index) the subbands connected to the selected narrow-
            band correlator input (if any). The subbands are concatenated.

            CLIC\SET SUBBANDS n1 n2 ...  /WINDOW first1 last1 first2 last2 ...

            The /WINDOW option select the first and last channels to be used for
            the LINE subbands. There should be one couple of parameter for  each
            group of subbands.

            In spectral mode, the window limits may be used to restrict the plot
            to a certain range, e.g.
                SET SUBBANDS L01 TO L02 /WINDOW 10 64

                will avoid plotting channels 1 to 9 of each of the two  subbands
            L01 and L02 (which are here combined to a single spectrum). This may
            be useful to flag meaningless channels at the low-frequency  and  at
            the  high  frequency ends of each spectral correlator. Note: this is
            now done automatically, see SET DROP command.

            In time mode, the window limits select the data to be integrated  to
            compute a single point.For example
                SET SUBBANDS L01 L02 /WINDOW 1 10 1 10 will plot data integrated
            from the first ten channels of the first line subband,  as  a  first
            quantity, and data integrated from the first 10 channels of the sec-
            ond line subband, as a second quantity.

            Note:  if you want to use both continuum and line subbands,  in  the
            same  plot   page, you should include dummy arguments in the /WINDOW
            option for the continuum spectra:
                SET SUBBANDS C01 to C10 L01 to L02 /WINDOW 0 0 2 64  (two  argu-
            ments are needed for each resulting spectrum).
            This command is now obsolete. Use SET SPW instead.