Panasonic AV-HS400AE - Manual (Page 107)

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7. Image transmission functions
<Transmitting images to the unit>
1. Select the mode.
Check that “To HS400” appears in the [Mode] field.
If “From HS400” appears instead, click the [From HS400] button so that “To HS400” appears.
. Select the transmission destination of the images in the [Target] field.
FMEM1: Unit’s frame memory 1
FMEM2: Unit’s frame memory 
3. When the [Select Image] button is clicked, the file selection dialogue box appears on the screen.
Select the image file to be transmitted, and click [OK].
The image is now displayed in the image display area, and its horizontal and vertical dimensions appear in
the [Width] and [Height] fields at the bottom right.
4. In the [Size] field, select the size of the image to be transmitted to the unit.
HD1080 (190  1080), HD70 (180  70), SD480 (70  487) or SD76 (70  76) can be selected as
the size. If the image is in a different video format from the ones supported by the unit, the output will not be
displayed properly.
. In the [Aspect] field, select the scaling method.
If the size of the image to be transmitted and the selected image differ, the image will be automatically
scaled according to one of the following methods.
Full: The size of the image is increased or reduced so that it fits the size selected in the [Size] field. If the
aspect ratio of the image to be transmitted differs from that of the selected image, the ratio between
the horizontal and vertical dimensions will be changed.
Keep: The image is expanded or reduced while its original aspect ratio is kept unchanged.
Any empty spaces in the image will appear black.
6. The [RGBA (FMEM1&)] button can be selected when images containing the alpha channel are to be
transmitted.
When the [RGBA (FMEM1&)] button is clicked, the RGB images are transferred to frame memory 1
(FMEM1), and the alpha channel images are transferred to frame memory  (FMEM).
When the [Display Alpha] button is clicked, the alpha channel images appear as a preview display.
7. Click the [Send] button to transmit the image to the unit.