LINE

                  LINE Name [Frequency Band [Lock [Center [Harm]]]]
                   /RECEIVER Irec
                   [/BEST best\ ]]
         Specifies the observing frequency in MHz for all antennas.   If  no
    Frequency  is  given,  the  line is selected from the line catalog.  The
    catalog format is the same as the LINE command format.
         Frequency is the observing rest frequency in GHz.
         Band is USB or LSB
         Lock is HIGH or LOW.
         Center is the IF frequency (in MHz) corresponding to the  specified
    rest frequency.  Default is 350 MHz.

         Harm is the harmonic number used to generate the LO1 from the
    LO2.  By default, Harm is computed in order to give LO2 as close as
    possible to `best\
         /BEST best\  ptional and defaults to 1860. for the 3mm
    receiver and 1875. for the 1mm receiver.

         The command is accepted in all modes, but sent  (by  command  LOAD)
    only     if     the     observing     mode   is   INTERferometric.   The
    relationship  between  the  various  frequencies  is  defined   in   the
    ``Frequency  Setup'' document, and summarized below.  (the signs defined
    according to the Band and Lock)
    3mm receiver
            FLO2 = (FSKY +|- CENTER +|- EPS) / (HARM +|- 1)
                       USB|LSB   HIGH|LOW          USB|LSB
    1.3mm receiver
            FLO2 = (FSKY +|- CENTER +|- 3*EPS) / (3*HARM +|- 1)
                       USB|LSB   HIGH|LOW              USB|LSB

    where   FSKY = FREST*(1-v/c) is the Doppler corrected frequency
            EPS  = 100 + 50/512