AVS-1210
I.R.T. Communications Pty Ltd | www.irtcommunications.com
Revision 06
Internal adjustments
The following adjustable resistors are factory set and should not be adjusted unless a component has been
changed. They are not 'operational' controls. Before adjusting any of these controls allow time for the module to
reach temperature stability.
RV 1 Transfer gain.
Set to best unity gain match for all inputs. (Set with all inputs/ outputs 75
Ohm terminated and using standard 1 Vp-p test signal.)
RV 2 Vertical interval switching time.
Set so that switching occurs at approximately 10 lines into the field
period of the video signal.
RV 3 Output DC offset.
Set to lowest average DC offset for all inputs.
Configuration
Local control panel operation:
Local 10 x 1 control:
First, see section on fitting local control panels under
Installation
.
PL 4 on the control panel is then connected to PL4 on the rear of the switcher.
PL 5 on the control panel is then connected to the switcher PCB.
20 x 1 operation
A link is provided (LK 2) to tell the switcher whether it is to respond to crosspoint commands 1 – 10 or 11 – 20.
When set in the 1 – 10 position, a code outside that range will cause the switcher to select the expansion input
(V 11). This input is then connected externally to another AVS-1210’s video output, with that switcher set to the
11 – 20 mode.
The outputs should be taken from the 1 – 10 switcher.
Local 20 x 1 control:
First, see section on fitting local control panels under
Installation
.
Control panels are looped by joining PL 5 (data out) on the 1 to 10 panel to PL 4 (data in) on the 11 to 20 panel.
Set link LK 2 OUT on the 1 to 10 panel and IN on the 11 to 20 panel.
PL 4 on the 1 to 10 panel is then connected to PL 4 on the rear of the switcher.
PL 5 on the 11 to 20 panel is then connected to the switcher PCB.
