Extron Electronics Audio-Video Switchers - Manual (Page 12)

Audio/Video Switchers • Operation Audio/Video Switchers • Operation
Operation, cont’d
3-5 3-4
output video using each device’s own operating instructions.
Select an input. The image should appear on the screen.
Selecting an input
To select an input using the front panel buttons, press and
release the button for the desired input (auto-sync detect
models must be in normal mode). The LED for the selected
input lights.
Input selection can also be done by an RS-232 device or a third
party contact closure device (see chapter 4, RS-232/Remote
Control).
Normal and auto-sync mode
The auto-sync detect model can operate in either normal
(manual switch) or auto-sync mode. Input selection by the front
panel buttons is blocked while in auto-sync mode. However,
the front panel LEDs remain functional and the buttons can be
used to view or change the mode.
Viewing the current switch mode
The current mode can be determined at any time by pressing
and holding the input 1/Mode button until either the
input 2/Norm or input 3/Auto LED blinks to indicate the
mode. Release the input 1/Mode button.
Conversely, if selecting input 1 and the input 1/Mode
button is held too long, the current mode is displayed
and input 1 is not selected.
Selecting normal mode
Press and hold the input 1/Mode and input 2/Norm buttons
simultaneously. The input 2/Norm LED blinks to indicate
normal mode. Release both buttons. The default input is
input 1, but if you release the input/Mode 1 button before
releasing the input 2/Norm button, the switcher may select
input 2.
When changing mode, if the input 1/Mode button is
released too soon (before the input 2 or 3 LED begins to
blink), input 1 may be selected.
Selecting auto-sync mode
Press and hold the input 1/Mode and input 3/Auto buttons
simultaneously. The input 3/Auto LED blinks to indicate auto-
sync mode. Release both buttons. The highest-numbered input
with video sync pulses present is automatically selected for
output. If no sync is present, no input is selected.
When changing mode, if the input 1/Mode button is
released too soon (before the input 2 or 3 LED begins to
blink), input 1 may be selected.
Audio gain and attenuation
The audio level of each input can be displayed and adjusted
through a range of -15dB to +9dB to ensure that there is no
noticeable volume difference among sources. The audio level
can be adjusted from the front
panel or by using Extron’s
Windows-based control program.
1 . Press and release an input
button to select an input.
Auto-sync detect models
must be in normal mode.
2 . Press and hold the Audio
button until the Audio LED
begins to blink, then release
the Audio button. The audio
level for the selected input is
displayed in the input 1
through 5 LEDs and the
polarity (+ or -) is displayed
by the +dB and -dB LEDs.
Each input LED indicates 0dB
when off, 1dB when blinking
slowly, 2dB when blinking
quickly, and 3dB when lit.
The +dB LED on indicates a
positive (gain) level. The -dB
LED on indicates a negative
(attenuation) level. Both
LEDs on indicate 0dB.
3 . Press and release the and
buttons to increase and
decrease the audio level.
4 . Press and hold the Audio
button until the Audio LED
turns off to save the gain
value in memory and exit the
audio display and adjustment
mode.
1 2 3 4 5
Input LED -dB +dB
dB
+9
+8
+7
+6
+5
+4
+3
+2
+1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-12
-13
-14
-15
B2
B2
B2
B2
B2
B2
B1
B1
B1
B1
B1
B1
B1
B1
B2
B2
Key: = off (value 0 dB),
= slow blink (value 1dB),
= fast blink (value 2dB),
= on (value 3dB)
B1
B2