Extron electronic RGB 118 PLUS user manual Using the SRI RGB 118 Plus only

Operation

Using the SRI (RGB 118 PLUS only)

The SRI feature of the RGB 118 PLUS is used to determine the approximate horizontal and vertical scan frequencies of video and computer monitors. To use the SRI, hold the RGB 118 PLUS with the feet against the face of the monitor and near the center of the screen as shown in Figures 1 and 2 below.

To view the vertical scan frequency, hold the unit so the LCD readout is on a vertical plane (red SRI button is in the uppermost position) as shown in Figure 1. Wait until the green Vertical (V) LED turns on, then push and hold the red SRI button in until a readout is obtained.

To view the horizontal scan frequency, hold the RGB 118 PLUS so the LCD readout is on a horizontal plane (normal viewing) as shown in Figure 2. When the red Horizontal (H) LED turns on, push and hold the red SRI button in until a readout is obtained. Anti-static, anti-glare or EMI coatings on the face of the CRT may prevent the RGB 118 PLUS SRI from displaying the monitor’s scan frequencies properly. Should this occur, an alternate method to obtain a readout is to set the RGB 118 PLUS on top and toward the rear of the monitor as shown in Figures 3 and 4 below. To view the vertical scan frequency using this method, set the RGB 118 PLUS as shown in Figure 3 with the red SRI button toward the rear of the monitor. Press and hold the red SRI button in when the green Vertical (V) LED turns on. To view the horizontal scan frequency, set the RGB 118 PLUS on the monitor as shown in Figure 4. When the red Horizontal (H) led turns on, press and hold the red SRI button until a readout is obtained.

Checking monitor Vertical Scan Rate using the RGB 118 PLUS SRI Checking monitor Horizontal Scan Rate using the RGB 118 PLUS SRI

Red

SRI

Button

Figure 1 Figure 2

Red

SRI

Button

Figure 3 Figure 4

Page 2-5 Extron • RGB 118 & RGB 118 PLUS • User’s Manual