Changing The SYnc Termination - Extron electronics Matrix 12800 Wideband video User Manual

Upgrades and Maintenance, cont'd
Changing the sync termination
In a sync BME, the first eight physical inputs on each I/O card are equipped with
sync termination DIP switches. Each switch provides the option of selecting either
510 ohms or 75 ohms.
Change the sync termination of the sync I/O card as follows:
1.
2.
C
3.
N All input numbers identified in figure 6-10 are physical inputs.
Figure 6-10 — Sync termination DIP switch
4.
5.
6-12 Matrix 12800 Switchers • Upgrades and Maintenance
If changing the configuration of an installed card, open and remove the front
door.
On the I/O cardcage door, turn the left and right knurled knobs ¼-turn
counterclockwise. Lower the door.
Do not touch the electronic components or the connectors on the backplane
or on the circuit cards without being electrically grounded. Handle circuit
cards by their edges only. ESD can damage ICs, even if you cannot feel,
see, or hear it.
Select the correct input card and the sync termination DIP switch specific
for the input to change (figure 6-10). Rock the DIP to the rear for 75-ohm
termination (the default setting). Rock the switch to the front for 510-ohm
termination.
DIP Input
switch card 1
1 Input 1
2 Input 2
3 Input 3
4 Input 4
5 Input 5
6 Input 6
7 Input 7
8 Input 8
Raise the I/O cardcage door to vertical and turn the left and right knurled
knobs ¼-turn clockwise.
Close the front door.
Switch
1
2
3
4
5
6
7
8
Input Input Input
card 2 card 3 card 4
Input 33 Input 65 Input 97
Input 34 Input 66 Input 98
Input 35 Input 67 Input 99
Input 36 Input 68 Input 100
Input 37 Input 69 Input 101
Input 38 Input 70 Input 102
Input 39 Input 71 Input 103
Input 40 Input 72 Input 104
DIP
Switches