Imagine Platinum VX - Page 54

Platinum™ VX
Installation and Operation Manual Platinum VX Modules
© 2016 Imagine Communications Corp. Proprietary and Confidential. Version 1.2 | Page 54
RS-422 Pin Assignments
Table 12: RS-422 Signal Format Pin Assignments
Pin
Signal (Tributary)
Description
Connection to Remote
Computer (Controller)
1
FG
Frame ground
Frame ground
2
Ta (Tx-)
Transmitted data
(twisted pair)
Ra (Rx-)
7
Tb (Tx+)
Rb (Rx+)
6
Tc
Received data shield
Received data shield
8
Ra (Rx-)
Received data
(twisted pair)
Ta (Tx-)
3
Rb (Rx+)
Tb (Tx+)
4
Rc
Transmitted data
shield
Transmitted data
shield
9
FG
Frame ground
Frame ground
5
SP
(Not connected)
(Not connected)
Sync Ports
The communications back module on the rear of 4 and 8 RU Platinum VX frames includes a sync port
with looping connectors. Each sync input automatically detects and locks to <NTSC, PAL, analog HD Tri-
Level> signals.
Figure 38: Sync Ports on the rear of 4/8 RU Platinum VX frames
Sync References and Switch Triggering
If no Sync signals are present, the switches occur asynchronously after a reasonable time-out period
(<0.1 seconds from reception of command). If a sync reference was present and is then removed (or
accidentally goes away), the router maintains relative vertical interval switching until a reference is
detected.
The following references can be detected and used to switch the following video standards on the
correct lines as per SMPTE RP168.