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SET SUBBANDS
CLIC\SET SUBBANDS n1 n2 ... [/WINDOW f1 l1 f2 l2 ...]
CLIC\SET SUBBANDS LINE|CONT
CLIC\SET SUBBANDS ALL
CLIC\SET SUBBANDS EACH
CLIC\SET SUBBANDS HOR|VER
CLIC\SET SUBBANDS Q1|Q2|Q3|Q4
CLIC\SET SUBBANDS NBC1|NBC2
Selects the subbands for which data will be displayed by command PLOT.
Valid codes are continuum subbands numbers (C01, C02, ... C08) or line
subbands numbers (L01, L02, ... L08). These are logical numbers, so one
should select e.g. L01 to L04 if four correlator units were used, indepen-
dentely from the physical units actually used. This is a classical trap,
especially with the old receiver system (<2007): if e.g. units 1 to 5 were
used on Receiver 1 and units 6 to 8 on Receiver 2, the corresponding sub-
bands will be L01 to L05 for the Receiver 1 scan, and L01 to L03 for the
Receiver 2 scan.
Subbands may be grouped by typing e.g. "SET SUBBANDS n1 to n2 and n3 n4".
Here, two quantities will be plotted. The first one is either the average
of subbands n1 to n2 and n3 (in time mode), or the concatenation of spec-
tral data from subbands n1 to n2 and n3 (in spectral mode). The second
quantity plotted is subband n4.
SET SUBBANDS LINE|CONT will switch all subbands to their line/continuum
counterpart, e.g. L01 to L04 will be changed to C01 to C04 by SET SUBB-
BANDS CONT. Done by SET X I_F
A number of usefule shortenings are available:
- SET SUBBANDS ALL will automatically select all the subbands in the first
scan of the current index, for each command accessing the data. The sub-
bands are concatenated (equivalent to e.g. SET SUBBANDS L01 to L06).
- SET SUBBANDS EACH will automatically select all the subbands in the first
scan of the current index, for each command accessing the data. The sub-
band are NOT concatenated (equivalent to e.g. SET SUBBANDS L01 L02 L03
L04 L05 L06).
- SET SUBBANDS HOR|VER will automatically select (in the first scan of the
current index) the subbands connected to the horizontal or vertical polar-
ization channel (if any). The subbands are concatenated.
- SET SUBBANDS Q1|Q2|Q3|Q4 will automatically select (in the first scan of
the current index) the subbands connected to the selected quarter (if
any). The subbands are concatenated.
- SET SUBBANDS NBC1|NBC2 will automatically select (in the first scan of the
current index) the subbands connected to the selected narrow-band correla-
tor input (if any). The subbands are concatenated.
CLIC\SET SUBBANDS n1 n2 ... /WINDOW first1 last1 first2 last2 ...
The /WINDOW option select the first and last channels to be used for
the LINE subbands. There should be one couple of parameter for each
group of subbands.
In spectral mode, the window limits may be used to restrict the plot
to a certain range, e.g.
SET SUBBANDS L01 TO L02 /WINDOW 10 64
will avoid plotting channels 1 to 9 of each of the two subbands
L01 and L02 (which are here combined to a single spectrum). This may
be useful to flag meaningless channels at the low-frequency and at the
high frequency ends of each spectral correlator. Note: this is now
done automatically, see SET DROP command.
In time mode, the window limits select the data to be integrated to
compute a single point.For example
SET SUBBANDS L01 L02 /WINDOW 1 10 1 10 will plot data integrated
from the first ten channels of the first line subband, as a first
quantity, and data integrated from the first 10 channels of the second
line subband, as a second quantity.
Note: if you want to use both continuum and line subbands, in the
same plot page, you should include dummy arguments in the /WINDOW op-
tion for the continuum spectra:
SET SUBBANDS C01 to C10 L01 to L02 /WINDOW 0 0 2 64 (two arguments
are needed for each resulting spectrum).
Gildas manager
2011-04-01