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Setup of the Backends (Spectrometers and Continuum)

!
! $Id$
!
BACKEND /CLEAR                              ! clear all backend definitions
!
!!      option /R is short for /RECEIVER 
!!      name   # resolu bandw.fShift   RX 
!!      ------ - ------ ----- ------   ----
!
BACKEND CONTIN 1 500      500    0  /R A100 ! continuum backend full syntax
BACKEND CONTIN 2 500      500    0  /R B100
BACKEND CONTIN 3                    /R A230 ! continuum backend short syntax
BACKEND CONTINUUM 4                 /R B230 
!
BACKEND 4MHz   1   4     1024    0  /R A230 ! 4MHz filters full syntax 
BACKEND 4MHz   2                    /R B230 ! 4MHz filters short syntax
!
BACKEND 1MHz   1   1      512    0  /R A230 ! 1MHz filters full syntax 
BACKEND 1MHz   2          256       /R B230 ! 1MHz filters short syntax
!
BACKEND 100kHz 1   0.1     12.8  0  /R A100 ! 100kHz filters full syntax 
BACKEND 100kHz 2           12.8     /R B100 ! 100kHz filters short syntax
!
BACKEND WILMA  1   2     1024    0  /R A100 ! WILMA setup full syntax
BACKEND WILMA  2                    /R B100 ! WILMA setup short syntax
!
BACKEND VESPA  1   0.020   40.0  2  /R A100 ! standard VESPA setup
BACKEND VESPA  2   0.020   40.0  2  /R B100 !
BACKEND VESPA  3   0.040   80.0 -2  /R A230 !
BACKEND VESPA  4   0.040   80.0 -2  /R B230 !
!
BACKEND VESPA  5   0.020   40.0  2 -        ! VESPA
                      /RECEIVER A100 B100 - ! with 2 receivers
                      /MODE POLARIZATION    ! in polarization mode
!
BACKEND VESPA  6   0.040   80.0 -2 -        ! VESPA
                      /RECEIVER A230 B230 - ! with 2 receivers
                      /MODE PARALLEL -      ! in paralell mode
                      /PERCENTAGE 91        ! non-standard precentage used
!

To execute this script, simply enter:

@ demo-backends

Normally the command BACKEND has 5 parameters: backend name, part number, resolution [MHz], bandwidth [MHz], and frequency shift [MHz]. Option /RECEIVER connects this backend part to a receiver. This receiver must have been previously specified with RECEIVER.

For some backends the resulution, bandwidth, and/or frequency shift are fixed and a shorter syntax is possible, see, e.g., the example above for the continuum backends. See the HELP for complete information.

/DISCONNECT disconnects a backend (part) while retaining its parameters.

/CONNECT (re-)connects the sepcfied backend (part).

Normally the continuum backends are used for pointing and focus.


next up previous contents index
Next: Calibration Up: Spectral Line Observations with Previous: Setup of the Receivers   Contents   Index
Gildas manager 2023-06-01