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SPW
[NOEMAOFFLINE\]SPW [/RANGE Fmin Fmax] [/FREQUENCY Fcent dF]
[/CHUNK ChunkList] [/LABEL Label]
Configure and visualize flexible spectral windows in Polyfix units. A
receiver tuning must have been defined (RECEIVER command) and at least a
baseband must have been selected (BASEBAND command). SPW can be used
only on Basebands defined with a correlator mode allowing for the con-
figuration of high resolution spectral windows. A typical sequence can
be:
TUNING 230 LSB 7777 : Define the receiver tuning
BASEBANDS 62.5 HUO : Select a baseband and assign a correlator mode
SPW /RANGE 227 227.3 : Configure and plot 1 spectral window
(from <~227 to ~>227.3 GHz)
SPW /FREQUENCY 228 0.2 : Configure and plot a second spectral window
of ~>200MHz around 228 GHz)
SPW /CHUNK 6 30 to 40 : Configure 2 new spectral windows
The frequency inputs with /RANGE and /FREQUENCY options have to be given
in the current main frequency axis as defined with the SET FREQUENCY
command (REST by default).
Once configured, the spectral windows are ordered by resolution then
frequency then polarization. The configured spectral windows can be
listed with the LIST command. The RESET command can be used to remove a
spectral window.
Feasibility of the setup: SPW returns warnings if the current definition
of spectral windows is not technically feasible (i.e. if a chunk is used
by more than 1 spectral window or if the spectral windows in a correla-
tor unit require more chunks than available). The warnings have to be
removed in order to be able to create an observing script (SETUP com-
mand, not yet implemented) or to make a summary plot of the setup (PLOT
command).
Subsections
Gildas manager
2024-03-29