AIPS HELP file for TVOFF in 31DEC25

As of Wed Dec 11 9:00:56 2024

INPUTS

COLORS         0.0        3.0      TV colors to enable
TVCHAN         1.0       16.0      TV channels to turn off

          The desired channels may be given instead as an
          immediate argument to TVOFF.  In that case, the
          channel specification is a BINARY mask of the desired
          channels.  Example:  TVOFF(13) will turn off TV
          channels 1, 3, and 4 (values 1 + 4 + 8 = 13).

HELP SECTION

TVOFF
Type: verb
Use:  Turn off (disable) one or all colors on one or more gray-scale
      image channels on TV.  Does not affect status (on or off) of
      colors or channels not specified.

      Note that, if TVOFF is used in a FOR or WHILE loop or in an
      IF-THEN-ELSE construct, then the immediate argument is required.
      Otherwise, some item necessary to the loop/construct will be
      taken as the immediate argument.

Adverbs: TVOFF takes an immediate arguement specifying, in BINARY
         code, which channels to turn off.  E.g. TVOFF(43) disables
         channels 1, 2, 4, and 6 (values 1 + 2 + 8 + 32 = 43).

  COLORS.....Specifies which colors to disable.  0 = all, 1 = red,
                2 = green, and 3 = blue.
  TVCHAN.....TV channel to turn off.  Only used if immediate argument
             is omitted and specifies a single value.  0 -> 1

EXPLAIN SECTION