Changes between Version 42 and Version 43 of Hardware/bDomains/aGrid

Timestamp:

Sep 15, 2016, 9:22:05 PM (8 years ago)

Author:

jkol

Comment:

—

Hardware/bDomains/aGrid

@@ -42 +42 @@
 
 The ORBIT Grid domain has many systems and hardware in place to facilitate running experiments. SDN capable switches are provided on the dedicated Data network for users to reconfigure as necessary. The timing synchronization system not only permits the massive-MIMO mini-racks to be synchronized, but also certain corner nodes in the main Grid as well. Additionally, a console machine is provided for jump access to the Grid nodes and for control of experiments and domain specific hardware.
+
+===== Synchronized Clock Reference (Octoclock) =====
+
+The Massive-MIMO mini-racks and several SDRs in the grid are connected to a GPS-disciplined clock reference system which gives the SDRs PPS (pulse per second) and 10MHz reference signals for synchronizing their internal oscillators. A tree-like topology with equal length cables ensures minimal deviation of the reference signals between connected devices. The following nodes are currently connected to this clock reference system:
+
+  || '''Location''' || '''Node''' ||
+  || "1-1 Corner" || 3-1 ||
+  || "1-20 Corner" || 1-19, 1-20, 2-19, 2-20, 3-19, 3-20, 4-19, 4-20 ||
+  || "20-1 Corner" || 17-1, 17-2, 18-1, 18-2, 19-1,19-2, 20-1, 20-2 ||
+  || "20-20 Corner" || 18-20 ||
+  || Massive-MIMO Mini-Rack || 23-1, 23-2, 23-3, 23-4, 23-5, 23-6, 23-7, 23-8 ||