The correlator has 8 independent units, which can be placed anywhere in the 100-1100 MHz band (1 GHz bandwidth). 7 different modes of configuration are available, characterized in the following by couples of total bandwidth/number of channels. In the 3 DSB modes (320MHz/128, 160MHz/256, 80MHz/512 - see Table) the two central channels may be perturbed by the Gibbs phenomenon if the observed source has a strong continuum. When using these modes, it is recommended to avoid centering the most important part of the lines in the middle of the band of the correlator unit. In the remaining SSB modes (160MHz/128, 80MHz/256, 40MHz/512, 20MHz/512) the two central channels are not affected by the Gibbs phenomenon and, therefore, these modes may be preferable for some spectroscopic studies.
Spacing | Channels | Bandwidth | Mode |
(MHz) | (MHz) | ||
0.039 | ![]() |
20 | SSB |
0.078 | ![]() |
40 | SSB |
0.156 | ![]() |
80 | DSB |
0.312 | ![]() |
80 | SSB |
0.625 | ![]() |
160 | DSB |
1.250 | ![]() |
160 | SSB |
2.500 | ![]() |
320 | DSB |