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On-line Hanning Smoothing Option

BW Bandwidth Single IF Mode$^{(1)}$ Two IF Mode$^{(2)}$ Four IF Mode$^{(3)}$
Code MHz No. Freq. Separ. No. Freq. Separ. No. Freq. Separ.
Chan. $^{(4)}$ kHz Chan.$^{(4)}$ kHz Chan.$^{(4)}$ kHz
0 50 8 6250 4 12500 2 25000
1 25 16 1562.5 8 3125 4 6250
2 12.5 32 390.625 16 781.25 8 1562.5
3 6.25 64 97.656 32 195.313 16 390.625
4 3.125 128 24.414 64 48.828 32 97.656
5 1.5625 256 6.104 128 12.207 64 24.414
6 0.78125 256 3.052 128 6.104 64 12.207
8 0.1953125$^{(5)}$ 128 1.526 64 3.052 32 6.104
9 0.1953125 256 0.763 128 1.526 64 3.052
Notes :
(1) Observing Modes 1A, 1B, 1C, and 1D.
(2) Observing Modes 2AB, 2AC, 2AD, 2BC, 2BD, and 2CD.
(3) Observing Mode 4, PA and PB.
(4) These are the numbers of frequency channels produced in the Array Processor. Any number of channels that is a power of 2, that is less than or equal to the number in the table, and that is greater than or equal to 4 may be selected using the data selection parameters on the DS card. When using on-line Hanning smoothing, data have to be selected, even if one wants the default total number of channels, rather than a subset. observe by default selects all channels.
(5) Specify a bandwidth of 391 kHz in loser for bandwidth code 8.


next up previous contents
Next: Interpreting Observe Up: Bandwidth and Number of Previous: Normal Mode   Contents
Stephan Witz 2003-04-15