Watchdog Changeover Unit User Guide - Trilogy Communications

Trilogy Communications LimitedWatchdog4.4 REAR CONNECTORS4.4.1 RM-01, RM-03, RM-38The 370-11-00 can use the same BNC and D-type rear connectors as the same 370-10-00 Active Board;see section 3.7 on page 14.4.4.2 370-50-00The 370-50-00 rear connector assembly is used to change over SDI signals in SD, HD or 3G format.Ch1 A Ch1 out Ch1 B Ch2 B Ch2 out Ch2 ANote:The input sequence for channels 1 & 2 is correct as shown above.The 370-50-00 may only be used with “mod state 3” 370-11-00 modules. See sections 4.1 and4.5.4.5 GPIThe GPIs are used to interface with the other active and passive boards in the frame. GPI inputs accepta command from other boards to cause a changeover. Remote control is only active when selectedusing the front edge controls (see section 4.6 below).GPI c (Channel 1) and GPI d (Channel 2) are configured as GPI inputs. They are used to remotelycontrol the changeover action of each channel. When the input is floating, signal input A is routed to the output When the GPI input is grounded, signal input B is routed to the output.All GPI inputs from each slot in the frame are also available on a D type connector adjacent to thepower supply. When using the BNC rear connector, all GPI wiring should use this connector. Pleasesee the Crystal Vision Indigo frame manual for more information.GPI e is used with modification state 3 boards only and should be pulled down to ground when the370-50-00 rear connector assembly is fitted. For all other rear connector assemblies, GPI e should beleft floating.GPI a, b, and f are currently unused.User Guide Issue 1.00 Page 21 of 28