Backends

There are 6 backends which can be individually connected to any receiver.

• The 1_1MHz filter bank, consisting of 512 channels of 1 MHz (can be split into two halves and connected to two different receivers);

• The 2_1MHz filter bank, consisting of 512 channels of 1 MHz (not splittable);

• The 100kHz backend, 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: 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 1_AUTO autocorrelator: Available resolutions are 10, 20, 40, 80, 320 and 1250 kHz. The bandwidth is between 20 MHz and 512 MHz, depending on resolution. The correlator can be split into 4 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).

• The 2_AUTO autocorrelator, identical to 1_AUTO.