Initial Setup

A typical Umbrella "Define" macro used for initial setup of the Haystack radiometers, includes the following parameters:
Project =
Maintenance =
Frequency =
Bandwidth =
SetupRow =
VCOffset =
CDPmode =
FrequencySwitch =
BeamSwitch =
Sourcelist =
These parameters can be bracketed with a beginning Define statement and an ending EndDefine statement. The Define/EndDefine allows the user to call a one-word definition to setup multiple parameters. For Example, a user setting up 2 channel, 7mm SiO observations might write the following macro:
Define 7mmSiO
Project = YourName-1
Maintenance = Off
Frequency = 43122027
Bandwidth = 160
SetupRow = C
CDPmode = 2M
FrequencySwitch = Off
BeamSwitch = On
Sourcelist = /home/pas/point.lst
EndDefine

This setup would allow 2-channel, 7mm Beamswitched observations on sources from the computer generated source list, point.lst, in the subdirectory pointed to by the Sourcelist command.
Define 7mmSiO

Sets the macro definition for all the parameters inside the Define/EndDefine brackets. The user would subsequently type "7mmSiO" to set the array of parameters
Project = Your Name

Typically you would use the proposal name assigned by the observatory. This will assist the staff in tracking and retrieving your spectra or continuum data from archives and in the clearing of disk space.
Maintenance =Off

This command sets important data taking flags in the Pointing Computer. The Maintenance= command should be inserted before the Frequency= command. Maintenance= resets the beamswitch status to off as part of the maintenance on/off checks.
Frequency = 43122027

This is the 7mm SiO (1,1) frequency in Khz. This commands the setup of Local Oscillators and Rest Frequencies at the console.
Bandwidth = 160

Sends the setup command to the correlator that along with the bandwidth selection, the default selections for Dicke switching rate and percent blanking are set. The 160 MHz bandwidth is typically selected to observe in continuum mode for pointing, on-off measurements, continuum box scans and drift scans.
SetupRow = C

Default (read from CDPMode= command) The SetupRow= command tells the correlator how many video converters you wish to use for your observations. This runs the same setup program that is initiated by the Bandwidth= command and allows the user the flexibility to use one or more video converters without changing the previously set switching parameters. This can be useful when switching between pointing and spectroscopy.
VCOffset = 0 0

Default. This returns the video converter frequency offsets to 0 if they have been previously set to a different value. Zero is the default value when the correlator setup is initiated for the first time. It is possible that a previous user could leave a non-zero number in the offset field (for example: when there is a need to merge more than one video converter output into wide bandwidth spectra). Therefore it is prudent for any observer to reset this parameter as part of their routine startup file.
CDPMode = 2M

The CDP (Continuum Data Processor) processes total power data depending on the mode selection and observing parameters.
FrequencySwitch = Off

Default. Since this example assumes the user is using the Beamswitcher, the current software setups will not allow the Beamswitcher AND Frequencyswitch flags to be enabled at the same time. If the FrequencySwitch= command is not invoked in your setup macro, you will see a continuous warning message that the on/off flag for Frequencyswitching is not defined. The default is actually the OFF flag but unless explicitly stated in the setup, Umbrella will not know the flag selection.
BeamSwitch = On

The command to start the beamswitcher at the Dicke switching rate set in the correlator startup program. The beamswitcher normally requires about 45 seconds to spinup to the required value and phase lock at that value. There is a panel in the control room where the beamswitcher status can be monitored.
SourceList = /home/pas/point.lst

The SourceList= command allows the user to open any sourcelist either already on the control computer or a list the user wishes to create from program sources. Planets do not require the use of a SourceList= command since the solar/lunar and planetary ephemeris is resident on the computer. Other galactic or extra-galactic sources must be included in an ASCII sourcelist readable by the Umbrella program. This list must include:
SourceName RA Dec Epoch VLSR

In the form:

Source hh mm ss.s dd mm ss yyyy Vel

A space should be left in the fields above as they are seen here. Restrictions on the use of certain characters in the source name can be found in the SourceList section of the full