Operating the Presentation Switcher
7
6 Operating the Presentation Switcher
You can operate your VP-23 via:
The front panel buttons and front panel control level knobs
RS-232 serial commands transmitted by a touch screen system, PC, or
other serial controller
The front panel buttons include: Video-Audio Selector, s-Video-Audio
Selector, VGA-Audio Selector, Master-Audio Selector (consisting of CV, s-
Video, VGA and Mic buttons), and Talk Over
1
.
The adjustable front panel control level knobs include:
VGA Level that adjusts a VGA/XGA image, which is dim or lacking in
sufficient detail, perhaps due to the use of long cables
2
, by increasing or
decreasing the VGA/XGA red, green and blue levels as well automatically
adjusting cable equalization
Audio Level that adjusts the overall audio output level at the Master
Audio Out port, without influencing any other audio output
Mic Level that adjusts the microphone level at the Master Audio Out port
and the talk-over function threshold
3
6.1 Operating your Switcher
You can switch one of the 4 CV inputs, one of the 4 Y/C inputs and one of
the 4 VGA/XGA inputs to the corresponding CV, Y/C or VGA/XGA outputs,
respectively.
To switch an input to an output:
Press one
4
button from the set of 4 buttons in the Video (CV)-Audio
section and/or
5
one button from the set of 4 buttons in the s-Video
(Y/C)-Audio section and/or one button from the set of 4 buttons in the
VGA/XGA-Audio section
Each pressed button illuminates
6
, indicating selection and outputting of that
video and audio source
1 With the Talk Over button pressed in, speaking into the microphone amplifies the voice of the speaker, overriding and
fading out all other audio channels. However, pressing the Mic button in the Master Audio Selector renders the Talk Over
function inactive
2 We recommend using a Line Amplifier when connecting long cables
3 Achieving optimum results when using a microphone may require experimentation in adjusting the Audio and Mic Levels
4 You cannot select more than one button in a section
5 You can overlook a section and choose not to select a button from it
6 Pressing an illuminated button for more than 2 seconds will disconnect the output and the button will no longer illuminate
