NetLinx Programming of DXLink Transmitters and Receivers
67
Hardware Reference Manual – DXLink™ Twisted Pair Transmitters/Receiver
Aspect Ratio Options
Stretch
(to fit) – This option (default) scales the video to full screen size in both horizontal and vertical directions regardless of the
input aspect ratio. No data is cropped. However, the image may be distorted as needed to fill the screen. When Stretch is selected,
black bars are not added by the scaler. However, if an image has originated from a source device with either horizontal or vertical
black bars (e.g., letter box from a movie), the black bars will be considered as active video and will be included in the stretched
video.
Maintain (
aspect ratio) – This option maintains the incoming video’s aspect ratio, but will scale the image until the display fills
either horizontal or vertical direction first. If the vertical direction is filled first, then the video will have pillar box black bars on the
sides of the display. If the horizontal direction is filled first, then the video will have letter box black bars on the top and bottom of
the display.
Zoom
– This option maintains the input aspect ratio while zooming the image to fill the screen in all directions. Image data may be
lost on the top and bottom or to the left and right of the displayed image.
Anamorphic
– This option is used with anamorphic formatted video sources so that images appear correctly on the display.
VIDOUT_ASPECT_RATIO
Sets the aspect ratio preference of
the video through the Receiver to
Stretch, Maintain, Zoom, or
Anamorphic.
(For explanations of the ratio
options, see page 67.)
Syntax:
SEND_COMMAND <DEV>,"'VIDOUT_ASPECT_RATIO-<ratio>'"
Valid responses:
ratio = STRETCH, MAINTAIN, ZOOM, ANAMORPHIC
Example:
SEND_COMMAND dvRX,"'VIDOUT_ASPECT_RATIO-ZOOM'"
?VIDOUT_TESTPAT
Requests the test pattern setting on
the Receiver.
Syntax:
SEND_COMMAND <DEV>,"'?VIDOUT_TESTPAT'"
Valid responses:
pattern = OFF,
COLOR BAR, GRAY RAMP, SMPTE BAR,
HILOTRAK, PLUGE, X-HATCH
Example:
SEND_COMMAND dvRX,"'?VIDOUT_TESTPAT'"
Returns a COMMAND of the form:
VIDOUT_TESTPAT-<pattern>
VIDOUT_TESTPAT
Sets the test pattern to display. Can
be sent in any Scaling Mode.
Syntax:
SEND_COMMAND <DEV>,"'VIDOUT_TESTPAT-<pattern>'"
Valid responses:
pattern = OFF, COLOR BAR, GRAY RAMP, SMPTE BAR, HILOTRAK, PLUGE, X-HATCH
Example:
SEND_COMMAND dvRX,"'VIDOUT_TESTPAT-COLOR BAR'"
?VIDOUT_MUTE
Requests the setting for the Mute
preference applied to the image from
the Receiver (Enable or Disable).
Syntax:
SEND_COMMAND <DEV>,"'?VIDOUT_MUTE'"
Example:
SEND_COMMAND dvRX,"'?VIDOUT_MUTE'"
Returns a COMMAND of the form:
VIDOUT_MUTE-<ENABLE|DISABLE>
VIDOUT_MUTE
Sets the Mute preference of the
image from the Receiver to Enable
(displays a blank screen) or Disable.
Syntax:
SEND_COMMAND <DEV>,"'VIDOUT_MUTE-<ENABLE|DISABLE>'"
Example:
SEND_COMMAND dvRX,"'VIDOUT_MUTE-ENABLE'"
Video SEND_COMMANDs (Receivers), continued
