TX1500 Manual Combined 1Oct03 PSC Page 9 of 31 Matrix
VIDEO INPUT CARD
The Video Input Card is used to connect 16 camera inputs to the Tx1500. Systems larger than 16 cameras will
use multiple cards. A board mounted DIL switch is used to set the card’s camera numbers.
Each input has a corresponding looping output on the lower BNC connector. The camera inputs are passively
terminated at 75? and auto de-terminate when a BNC plug is connected to the looping output. Up to 6 cards
can be used to allow up to 96 camera inputs.
Fig 11. Video Input card Front Panel View
Fig 12. Video Input card internal view
The switchs for each card will be set at the factory however if the system is to be upgraded then please set the
new card(s) switches as shown on the right.
Unpredictable results will occur if multiple cards have the switches set to the same address.
Fig 13. Video Input card SW1 address switch setting
PL1 PL5PL2PL6PL3PL4
SW1 LD1
00101
BBV
J17
Top view of Tx1500 video input board PCB00101
Video bus Control bus
VIDEO INPUTS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
Camera 1 - 16 Camera 17 - 32 Camera 33 - 48
Camera 49 - 64 Camera 65 - 80 Camera 81 - 96
SW1 Camera Range