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Chapter 3 • Operating the RGB 320 Panels
Extron • User’s Manual • RGB 320 Switching Interface System
Front Panel Controls
There are panel controls for adjusting four functions for the selected input. These
will be explained later in this chapter. Although the knobs can be turned endlessly
(no physical limit), the adjustment level will stop at its highest or lowest value.
Input buffer control (RGB 322/324/326/340)
Before going into the operation of the RGB 320 panel, here is an overview of the
input buffers that can be used with the RGB 320. Details on installing and
operating the buffer units are in the RGB 322/324/326/340 User’s Manual
(68-338-01). The buffer units’ features are summarized as follows:
Feature/Buffer model Type 322 324 326 340
Power LED indicator yes yes yes yes
Video In connector yes yes yes yes
Audio In connector no yes yes yes
75 Ohm/Hi Z switch yes yes yes yes
Horizontal shift adjust control yes yes no yes
Vertical shift adjust control no yes no yes
Show me/Select button control yes yes no yes
Show me/Select light indicator yes yes no yes
Mount in wall/furniture design yes yes yes no
Mount under table/shelf design no no no yes
Available in three colors design yes yes yes no
Figure 3-3. RGB 322/324/326/340 Differences
All buffers except the RGB 326 have some
control of the RGB 320, as initiated by the
“Show Me” button. Pressing this button initiates communication with the RGB 320
for the following:
• Request that the image from this buffer be displayed on the output device(s).
• The “Show Me” light on the buffer indicates when the input is selected, and it
blinks for audio breakaway.
• On the RGB 322, if “Show Me” is lit, use the H. Shift knob for horizontal centering.
• With either the RGB 324 or 340, if “Show Me” is lit, press the “Show Me” button
again and observe which of the four green LEDs is lit for the four adjustments:
H Shift, V. Shift, Video Level and Audio Level. Press the “Show Me” button until
the desired function is selected. Turn the “Adjust” knob to make the adjustment.
• The buffer’s power light shows “power on” and blinks when the RGB 320 is busy.
• Although the RGB 326 cannot request that its input be displayed, it has an active
light to show that it has been selected by the RGB 320 from another source.
• Adjustable horizontal and vertical shift (centering) for the selected input.
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