PTC Setup at VLA B. Carlson

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Presentation transcript:

PTC Setup at VLA B. Carlson EVLA Correlator F2F Meeting Dec. 11-12, 2007

EVLA Correlator F2F Meeting - PTC at VLA Outline Overview. Connectivity. Timecode distribution. Schedule. B. Carlson, 2007-Dec 11-12 EVLA Correlator F2F Meeting - PTC at VLA

EVLA Correlator F2F Meeting - PTC at VLA Overview 10 Station Boards. 12 Baseline Boards. 12x128 = 1.536 GHz in both polarizations (3-bit) 8-bit: only 1 polarization unless do some “fiber fiddling” with ½ antennas. Use production racks at site, with production cables. It is a partially populated correlator. B. Carlson, 2007-Dec 11-12 EVLA Correlator F2F Meeting - PTC at VLA

EVLA Correlator F2F Meeting - PTC at VLA Connectivity 10 Station Boards installed in 3 racks. 1 quadrant. 4 boards in 2 racks, 2 boards in last rack. If X-bar Boards not ready…bypass using direct connection of long cables “split-off” into Station Board outputs. B. Carlson, 2007-Dec 11-12 EVLA Correlator F2F Meeting - PTC at VLA

EVLA Correlator F2F Meeting - PTC at VLA B. Carlson, 2007-Dec 11-12 EVLA Correlator F2F Meeting - PTC at VLA

EVLA Correlator F2F Meeting - PTC at VLA Connectivity Baseline Boards: 12 boards available. Partially populate 1 quadrant (2 racks) with every other board. Only doing 10 stations (10 active wafers into each Baseline Board), so only need 1 Baseline Board to do all baselines for 1 sub-band pair. B. Carlson, 2007-Dec 11-12 EVLA Correlator F2F Meeting - PTC at VLA

EVLA Correlator F2F Meeting - PTC at VLA B. Carlson, 2007-Dec 11-12 EVLA Correlator F2F Meeting - PTC at VLA

Timecode Distribution If X-bar Board not ready, use existing FB/TC board to provide NRAO TC to Station Boards. Have to jury-rig temporary Meritec cabling to accomplish this. Not a problem…it’s all Meritec wafers anyway. B. Carlson, 2007-Dec 11-12 EVLA Correlator F2F Meeting - PTC at VLA

EVLA Correlator F2F Meeting - PTC at VLA Schedule Should have rack-to-rack cables ready for install mid-end February/08. Provided no delays in Meritec delivery. Cable set sheathing, heat-shrink, now in stock. Cable set plan ready. Labels ready shortly. People all geared up to start as soon as cables arrive. Should have racks ready by end of April/08 or sooner. B. Carlson, 2007-Dec 11-12 EVLA Correlator F2F Meeting - PTC at VLA