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3.1.1. Controlling the Downconverter Mode
The Downconverter in the HD9155 converts the 16:9 aspect ratio of the HD video to the 4:3 aspect ratio of
the standard definition video in one of two modes
•
Letterbox
•
Anamorphic Squeeze
•
Center Crop
Each time the DOWNCONVERTER front panel switch is pressed and released on the change side the
downconverter mode will change. On the HD9155-AUD and HD9155Q-AUD models, the switch is spring
loaded. On the other models the user will have to press the opposite side of the switch each time. The
downconverter mode set by using the front panel DOWNCONVERTER switch will be overridden when
user downloads a user configuration.
3.1.2. Turning the Characters On and Off
The Character generator keyer in the HD9155 can be turned on and off using the CHAR GEN front panel
switch. The setting of the CHAR GEN switch will normally override the global character generator On/Off
mode of a user configuration when the CONFIG switch is set to USER.
If you want to control the global Character on/off mode from the user configuration you will need to disable
the Front panel CHAR GEN switch by setting system parameter class 15 parameter 8 to –255 in the 9150
Configware™ software. When the CONFIG switch is set to USER, the global character generator On/Off
mode of the user configuration will be active. When the CONFIG switch is set to FACTORY, the front
panel CHAR GEN switch will always control whether the character generator is on or off.
3.1.3. Loading the Factory Config or User Config
The HD9155 has two sets of presets that can be loaded using the CONFIG front panel switch. When the
switch is set to FACTORY, the default configuration shown on page 1 will be loaded. The front panel
DOWNCONVERTER and CHAR GEN switches will determine the downconverter mode, and whether the
character generator keyer is on or off.
When the switch is set to USER, the user configuration that has been loaded using the 9150 Configware™
software will be loaded. The front panel DOWNCONVERTER and CHAR GEN switches will override the
downconverter and character generator keyer on/off mode of the User Config unless you disable the Front
panel switches using system parameters. See sections 0 and 3.1.2 for information on disabling the
DOWNCONVERTER and CHAR GEN switches respectively.
3.1.4. Monitoring the Audio (models HD9155-AUD and HD9155Q-AUD only)
The HD9155-AUD and HD9155Q-AUD versions are fitted with a ¼ inch stereo headphone jack on the
front panel for monitoring the audio being de-embedded from group 1 of the HD video. The CHANNEL
switch will select whether you are monitoring audio channels 1 and 2 or channels 3 and 4. The VOLUME
switch is used to set the headphone volume. Press it on the – side to lower the volume and on the + side
to increase the volume.
OPERATION
Model HD9155 Production Afterburner Manual
Revision 1.3
Page 3-3
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