Chapter 3 • Operating the RGB 320 Panels
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
Feature/Buffer model | Type | 322 | 324 | 326 | 340 |
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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 | |||||||||||
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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.
Extron • User’s Manual • RGB 320 Switching Interface System |