Operation, cont’d
Audio/Video selection control and indicators (audio switchers)
1I/O button — The I/O button selects video, audio, or video and audio for input selection.
This button has no function on audio-only switchers.
2Video and Audio LEDs — The Video and Audio LEDs indicate whether video, audio, or video and audio will be selected using the Input buttons ( 3 ) and indicated by the Input LEDs ( 4 ).
The Audio LED is always lit on audio-only switchers.
Pressing the I/O button advances through a cycle of video and/or audio selection as follows: {default} video and audio, {press} video only, {press} audio only, {press} video and audio, and so on (figure
VIDEO 
AUDIO
Default
(Video &
audio)
I/O
VIDEO
AUDIO
Press Video only
I/O |
| I/O |
|
| VIDEO |
| VIDEO |
| AUDIO |
| AUDIO |
Press | Audio | Press | Video & |
| only |
| audio |
| LED key: | = on, | = off |
Figure 3-4 — Video and/or audio selection cycle
Input selection controls and indicators
3
4
Input 1 through 4, 6, 8, or 12 buttons — Each Input button selects the associated input for output. A more detailed explanation of the input selection function is included in Front panel operations, beginning on page
On video switchers, the Input 1, Input 2, and Input 3 buttons are also used to toggle autoswitch mode on and off. See Autoswitch mode controls and indicator (video switchers) on page
On audio models, the Input 1 and Input 4 buttons are also used to toggle executive mode on and off. See Autoswitch mode controls and indicator (audio switcher) on page
On
Input 1 through 4, 6, 8, or 12 LEDs — The input LEDs identify the selected input.
On models that switch both video and audio, if audio is broken away, the selected video input is indicated by a steadily lit input LED and the selected audio input is indicated by a blinking input LED.
On audio switchers, the input LEDs also indicate the audio level (attenuation
