TV Logic LEM-150, Operation Manual

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Other Functions
[3] ASPECT BUTTON
1. Four different aspect modes are available.
When input signal is SDI -A/B, Composite 1/2/3 and Input Signal Format is SD :
1) 4:3 mode : Cuts left and right of the original image to fit to 4:3 aspect ratio.
2) 16:9 mode : Stretches the image in “1) 4:3 mode” to fit to 16:9 aspect ratio.
3) 4:3Ex : Extends the image vertically without altering the source image.
4) 16:9Ex : Stretches the image in “3) 4:3 mode(extend)” to fit to 16:9 aspect ratio.
* NTSC and PAL signals are known to be 4:3 aspect ratio signals, but their aspect ratio is not
exactly 4:3. Therefore, select “1) 4:3 mode) to display the exact 4:3 aspect ratio, select “3) 4:3
mode (extend)” to display the image without altering the source image.
* ASPECT button lamp status: 1 - 1)/3) Off, 2 - 2)/4) : On.
2. When input signal is COMPOSITE 1/2/3, S-VIDEO, RGB, DVI ANALOG, DVI DIGITAL or HDMI mode,
all “1 – 1),2),3),4)” display the image in 4:3 and 16:9 without altering the source image.
3. For the above aspect modes, ZERO SCAN is the standard scan mode. And, in the other scan modes,
aspect ratio changes using the image in its selected scan mode.