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Start Date:2011-09-23 Location:Charlottesville, VA |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:The back of a Station Rack for the ALMA correlator. There are four types of racks in the correlator which consists of 40 racks total. The Station Racks receive the data from the individual antennas and perform all the operations on it that can be done on a single-antenna basis. From the Station Racks the signals are routed to the "Correlator Racks" which perform the actual correlation of antenna signals on an antenna-pair basis. The blue cables that are so easily seen are the cables used to transport the data between the Station Racks and Correlator Racks. [show more]
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Start Date:2011-09-23 Location:Charlottesville, VA |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:The back of a Station Rack for the ALMA correlator. There are four types of racks in the correlator which consists of 40 racks total. The Station Racks receive the data from the individual antennas and perform all the operations on it that can be done on a single-antenna basis. From the Station Racks the signals are routed to the "Correlator Racks" which perform the actual correlation of antenna signals on an antenna-pair basis. The blue cables that are so easily seen are the cables used to transport the data between the Station Racks and Correlator Racks. [show more]
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Start Date:2011-09-23 Location:Charlottesville, VA People:Pospieszalski, Marian
Greenberg, Joe |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Marian Pospieszalski (front) and Joe Greenberg (behind) at the correlator in the NTC Correlator Lab.
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Start Date:2011-09-23 Location:Charlottesville, VA People:Saez, Alejandro
Vulinovic, Miroslav
Ortiz, Francisco
Doshi, Prashant |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Alejandro Saez (back to camera) discusses the correlator in the NTC Correlator Lab with Miroslav Vulinovic and Francisco Ortiz, Prashant Doshi background left
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Start Date:2011-09-23 Location:Charlottesville, VA People:Doshi, Prashant
Saez, Alejandro
Vulinovic, Miroslav
Ortiz, Francisco |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Prashant Doshi, Alejandro Saez, Miroslav Vulinovic, and Francisco Ortiz in the NTC Correlator Lab
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Start Date:2011-09-23 Location:Charlottesville, VA People:Lacasse, Rich |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Rich Lacasse gives a tour of the NTC Correlator Lab.
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Start Date:2011-09-23 Location:Charlottesville, VA People:Ortiz, Francisco
Saez, Alejandro |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Francisco Ortiz and Alejandro Saez in the NTC Correlator Lab
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Start Date:2011-09-23 Location:Charlottesville, VA People:Schmitt, Dave
Morgan, Matt |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Dave Schmitt and Matt Morgan in the NTC Correlator Lab.
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Start Date:2011-09-23 Location:Charlottesville, VA People:Lacasse, Rich
Cais, Philippe |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Rich Lacasse (back to camera) gives a tour of the NTC Correlator Lab. Philippe Cais is on the left
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Start Date:2011-09-23 Location:Charlottesville, VA People:Quertier, Benjamin
Baudry, Alain |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Benjamin Quertier and Alain Baudry in the NTC Correlator Lab
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Start Date:2011-09-23 Location:Charlottesville, VA People:Winter, Heidi
Escoffier, Ray |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Heidi Winter, Ray Escoffier in the NTC Correlator Lab.
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Start Date:2011-09-23 Location:Charlottesville, VA People:Morris, Greg
Treacy, Bob
Greenberg, Joe |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Greg Morris, Bob Treacy, Joe Greenberg in the NTC Correlator Lab.
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Start Date:2011-09-23 Location:Charlottesville, VA People:Ortiz, Francisco
Vulinovic, Miroslav
Saez, Alejandro |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Francisco Ortiz, Miroslav Vulinovic, Alejandro Saez in the NTC Correlator Lab
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Start Date:2011-09-23 Location:Charlottesville, VA People:Broadwell, Chuck |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Chuck Broadwell in the NTC Correlator Lab.
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Start Date:2011-09-23 Location:Charlottesville, VA People:Escoffier, Ray |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Ray Escoffier in the NTC Correlator Lab.
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Start Date:2011-09-23 Location:Charlottesville, VA |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Part of the "Tunable Filter Bank" card for the ALMA correlator. It was designed, fabricated and tested by Alain Baudry's group in Bordeaux and supplied to the NRAO correlator group in Charlottesville to integrate into the ALMA correlator. The large silver chips, labeled Altera Stratix II, form the heart of this board, a bank of digital filters that is used to set the bandwidth analyzed by the correlator. These are not custom chips; they are commercially available field programmable gate arrays (FPGAs) whose program is designed by the final user. [show more]
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Start Date:2011-09-23 Location:Charlottesville, VA |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
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Start Date:2011-09-23 Location:Charlottesville, VA |
Creator:Records of the NRAO Series:Photographs Series Unit:MMA/ALMA Unit Subunit:Charlottesville Correlator Lab Subunit Type:Still Image Original Format of Digital Item:Digital photograph Subject:Electronics--Correlator |
Description:Framed display just outside the NTC Correlator Lab. It contains two wafers. A wafer is a thin, round piece of silicon with an array of integrated circuits fabricated on it. Each square is an integrated circuit. The wafer on the top contains integrated circuits called "VLA1" from the VLA correlator, fabricated in 1977. The wafer on the bottom contains integrated circuits called ALMA1 from the ALMA correlator, fabricated in 2003. The blank spaces in the bottom wafer are from chips that tested good and were packaged for installation on circuit board. Part of what the display shows is the difference in size of the physical wafers. In the 26 years between the fabrication of the two wafers, the technology had progressed to the point where much larger wafers could be fabricated. What you don't see in the comparison is the size of the features on the two wafers. Not only is the ALMA1 chip bigger, it also contains much smaller features. [show more]
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Location:VLA Site, NM |
Creator:Records of the NRAO Series:Photographs Series Unit:VLA Unit Type:Still Image Original Format of Digital Item:Slide Subject:Instruments--Very Large Array (VLA)
Electronics--Correlator |
Description:Wirewrap backplane in correlator room at VLA
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Location:VLA Site, NM |
Creator:Records of the NRAO Series:Photographs Series Unit:VLA Unit Type:Still Image Original Format of Digital Item:Slide Subject:Instruments--Very Large Array (VLA)
Electronics--Correlator |
Description:Computer terminals and view into the correlator room at the VLA
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Location:Socorro, NM |
Creator:Records of the NRAO Series:Photographs Series Unit:VLBA Unit Type:Still Image Original Format of Digital Item:Slide Subject:Instruments--Very Long Baseline Array (VLBA)
Electronics--Correlator |
Description:VLBA correlator in the Array Operations Center in Socorro, NM
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