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11.19 HMX832 AND HMX832L VIDEO INPUT AND SWITCHING MODULES
11.19.1
General
The HMX832 and HMX832L Video Input and Switching Modules are both 8 input
Modules designed to connect video inputs to the HD-Series of Video Matrix Switches.
Either Module style can be fitted to an HMX32128 Subrack, and both can be fitted to the
same subrack simultaneously. Physically they both function in the same manner. Up to
16 HMX832 or HMX832L Modules can be fitted into one HMX32128 Subrack (maximum
of 16 video input slots available).
11.19.2
HMX832 Connectors
The MX-832 is fitted with 8 BNC connectors on the rear of the Module for simple
connection of video inputs via industry standard coaxial cable connectors.
11.19.3
HMX832L Connectors
The HMX832L is fitted with two 16-way IDC style male connectors on the rear of the
Module to allow 8 video inputs (top connector), looping to the second 16-way IDC style
connector (bottom connector). This application can be used for "Looping" or
"Cascading" HD-Series Matrix Switches, or simply for utilizing the MXBNC64 or
MXBNC128 Video Input Plates (Patch Panels - refer to Product Data Sheets for details of
these two products).
11.19.4
Operation
Both the HMX832 and HMX832L Modules are fitted with eight 3-pin jumpers (Termination
1 – Termination 8) located near the video input connectors at the rear of the Module.
These jumpers are used to terminate the video on the Module at 75 ohm (if required).
In a "Looping" or Cascading" configuration 75 ohm terminating is not required and the
jumpers should be placed in the "OFF" position (to the left).
If terminating is required or the Module is the last in a "Looping" or "Cascading"
configuration, the jumpers should be placed in the "ON" position (to the right).
Rev. C
CAUTION: The 3-pin Termination Jumpers are only
available from board numbers MS001287 and above
(HMX832 Rev. 8).
Previous versions of the hMX832L required a MX9018
Plug-in Terminator, and Audio applications could utilize
the HMX832A Module (fitted with BNC connectors), which
did not have the 75 ohm terminating resistors fitted.
11-18
HMXMU001018
10/06
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