Backends

There are 4 backends which can be individually connected to any receiver.

• The 1 MHz filterbanks, consisting of 4256 channels each. The four parts can be combined to give a 1 GHz (4256 MHz) wide filterbank (at present only usable with 230G2, no other backend can be connected to 230G2 in this case), or two filterbanks of 512 MHz each. Any shift of the four subbanks relative to each other is also possible in steps of 32 MHz. Each part can be connected to a different (or the same) receiver.

• The 100kHz filter bank, consisting of 256 channels of 100 kHz (splittable into two halves movable inside the 500 MHz instantaneous bandwidth, and connectable to two different receivers)

• The 500 channel AOS: ( Under repair)
  Bandwidth 500 MHz; actual spectral resolution 1.5 MHz. Using the AOS with the 3 mm SIS receiver results in higher noise at the band edges, so the combination 3 mm SIS + AOS is not recommended.

• The autocorrelator: The software treats the autocorrelator as one unit although physically it consists of two identical machines. The following numbers are to be understood for the complete autocorrelator setup. Available resolutions are 10, 20, 40, 80, 320 and 1250 kHz. The bandwidth is between 20 MHz and MHz, depending on resolution. The correlator can be split into 8 independent subbands, each of which can be configured individually and connected to the same or different receivers. For the larger bandwidths (i.e. more than one subband of 80 MHz) a problem of platforming may exist (i.e. baselines from the different subbands have slightly different levels).