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1 Language
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pico_\ Language summary

.nf
BACKEND	      : Displays the frequency coverage of a given backend
BASEBANDS     : configure the switchbox
EMIR          : define parameters for observations with EMIR receiver
.\"SELECT        : select the 30-m instrumental status
.fi
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1 BACKEND
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[PICO_\]BACKEND BackendName [BackendMode]  

Set and identifies the frequency coverage of a Backend (BackendName =
FTS, WILMA, or VESPA).  The coverage is displayed, and lines
in the current line catalog are overlaid if SET LINES ON is set.
(See CATALOG and SET commands).

BackendMode is only valid for FTS. Can be NARROW (50kHz resolution) or
WIDE (200kHz resolution).

For VESPA, the commands displays the region where units can be
placed. Their setting and display will be implemented later.  2 Color
codes:
.nf
Grey			: region not covered by the Backend
Light green		: backend unit coverage
Darker green	: region covered by another backend
.fi
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1 EMIR
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[PICO_\]EMIR [Ftune1 SB1 [Ftune2 SB2]]  [/ZOOM Keyword]  [/PAGEWIDTH] [/INFO]

Without arguments, the command displays the available bands of EMIR.
With the option /INFO, several informations about the receiver are
listed in the terminal.

Different ranges are colorized:
.nf
Black		: outside the receiver bands
Dark grey	: in the receiver bands, but not accessible with the present tuning
White		: in the receiver bands, accessible with the present tuning
.fi

With arguments, the command defines the tuning of EMIR (up to 2 bands)
and represents it on the global view.  

Tuning syntax:
.nf
Ftune1,2	: Frequency (GHz) of the first (second) band to tune
SB1,2		: IF baseband where to place Frest1,2 (used to define LO frequency) 
.fi

Ftune1,2 must be in the current frequency main axis (REST by default,
but can be changed with SET FREQUENCY command). If a source was
previously defined, its velocity or redshift is taken into account to
convert Ftune1,2 to RF frequencies.

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2 /PAGEWIDTH

[PICO_\]EMIR [...] [/PAGEWIDTH]

When several receiver bands are plotted, this option forces their
width to match the plot page. The consequence is that the different
bands are displayed with different scaling in GHz/cm.
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2 /ZOOM

[PICO_\]EMIR [...] /ZOOM [Keyword] [Fmin Fmax]

Different zooming modes are implemented according to the entered Keyword and the number of tuned bands.

.nf
ID		: Displays all the EMIR bands, the current tuning(s) is(are) identified (white region(s)) 
BOTH		: When two bands are tuned they are plotted without the unused ones
1,2		: Focus on the first or second tuning, with zoom on the two sidebands.
.fi

If a frequency range Fmin Fmax (in GHz) is given instead of a keyword, zoom on this range.
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1 BASEBANDS
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[PICO_\]BASEBANDS [Code1 Code2 Code3 Code4] [/SINGLEPOLAR]

After a EMIR tuning (one or more bands), defines what are the spectral
ranges that are sent to the Backends through the 8 available IF
cables.  

On the plot, the selected basebands are identified with their name
(see below).  Baseband which will not be brought towards the backends
are filled in light grey. If the current plot corresponds to the
result of a tuning, the plot is not redrawn.  Otherwise the current
plot is redrawn.

Without arguments, an automatic selection is performed.  When
more than one receiver band are tuned, the default maximises the
coverage of the FTS units and selects dual polarization when possible
(losing a sideband in each receiver band).

With the option /SINGLEPOLAR, the coverage of the FTS is still
maximum, but only one polarization is selected in order to process the
two sidebands in both receiver bands.

When codes are given, then the selection is up to the user. This might
be needed to send OUTER basebands towards WILMA and VESPA backends.  4
codes as inputs are required to set the content of the IF cables 1 to
4.  The content of IF cables 5 to 8 is not flexible and is the outer
baseband of the Receiver/Sideband/Polarization combination chosen for
cables 1 to 4).

The format of the Code is: BBPSB
.nf 
BandName (2 characters)	: BB = E0, E1, E2 or E3 for EMIR
                          bands E090, E150, E230 or E350
Polar    (1 character)  : P = H or V
Sideband (1 character)  : S = U or L
Baseband (1 character)  : B = I or O
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2 /SINGLEPOLAR
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[PICO_\]BASEBANDS [Code1 Code2 Code3 Code4] /SINGLEPOLAR

This option may be needed when 2 receivers are used simultaneously.
With the option /SINGLEPOLAR, the coverage of the FTS is still
maximum, but only one polarization is selected in order to process the
two sidebands in both receiver bands.

.fi
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1 ENDOFHELP
