Summary of Changes 26-28 Jan 98

    The RX command has been reworked.  The receiver names are parameters
to RX itself.  No /R_NAME adverb is necessary.  The /CHN1 and /CHN2 adverbs
are also gone.  These were used to specify which SIS345 channels went to
which backend.  This is now handled by the BE_FE command.  See 
[SMT.DOC]FRONTENDS.DOC for more details on the frontend-backend scheme.

    The RX command also sends the OBSINP parameters that make FEORGA change
the IF and synthesizer switches to select that receiver.  It should not be
necessary to change them via the Host4 buttons.  But it still is necessary
to manually set the X and Y switches on the MPIfR Switch Box to select
which IF goes to which spectrometer.

    The OBST SAVE and RESTORE commands have been enhanced.  It should no 
longer be necessary to execute certain OBST commands to complete the
restoration of the SAVEd configuration.  Notify Bill if you find something
that was missed.  Because of this, RESTORE <SAVE file name> is no longer
equivalent to @<SAVE file name>.  (After performing @<SAVE file name>,
RESTORE then executes @TEL$OBS:RESTORE.)