A new IF processor allows to use the 1 MHz filter banks in a more
flexible way: the 1 MHz filter banks are now split into 4 parts of
MHz channels each. Any combination ( e.g. 
MHz = 1024 MHz, or 
MHz etc.) and any shift
of the 4 subbanks relative to each other (in steps of 32 MHz) is
possible.
Each part can be connected to a different (or the same)
receiver. Connecting the four parts in series provides a 1 GHz wide
backend (at present only usable with 230G2). The distinction between
``first'' and ``second'' 1 MHz filter bank is not necessary any more. The
previous OBS commands 1_1MHZ and 2_1MHZ are replaced by a
single command 1MHZ. The syntax is similar to the autocorrelator
command.