AMX AVB-RX-DGX-SC Fiber-DVI, Instruction Manual

Page: 42 / 79

Scaling Options
38 DGX Transmitters & Receivers Instruction Manual
Auto Option (SmartScale
®
)
In most cases, selecting the DGX HD-15 RX and DGX DVI RX Auto option (default) provides a
satisfactory image on the destination monitor or device. In this case, no other action is required.
Note:
The Auto option automatically persists when the power is cycled on the RX, unless the
persisted state has been changed (see page 37).
Bypass Option
If the Auto option does not provide a satisfactory image on the monitor, the Bypass option can be
selected with the Scaling button. When Bypass is selected, any modifications to the video signal
generated on a DGX HD-15 TX or DGX DVI TX (see page 45) are left unmodified by the RX, i.e., the
signal leaves the RX exactly as it came into the RX.
To keep in mind regarding the Bypass option:

When adjusting a TX with Board Config software, setting the RX to the Bypass option is
recommended if the display will support the desired resolution (see page 47).

If the RX fails to read the EDID on power up (i.e., no resolution data is available from the
destination device), the RX reverts to the Bypass option until the video cable is unplugged and
then plugged in, at which time it will attempt to read the EDID again.
Note:
When Bypass mode is selected, an interlaced source changes to a progressive output.
To select the Bypass option on the RX:
1.
Press the Scaling button on the RX once or twice (depends on current selection) until the Bypass
LED illuminates solid green.
Note:
If you want this option to persist when the power is cycled on the RX, see page 37.
Manual Option and the Scaler Override Utility
In some special installation cases, you will need to select Manual on the DGX RX to override the
automatic scaling and set (configure) a specific or a custom resolution for the display monitor.
When a
DGX RX is connected to a PC running the Scaler Override utility, the utility displays the resolutions
supported by the destination monitor based on the set of supported resolutions in the monitor’s (or other
destination device’s) EDID. Settings can then be selected and applied to the RX.
When you select Manual, the RX sets up the video scaler with factory default values (1280x1024
@ 60 Hz). EDID preferred resolution parameters are used if available, unless scaler setup parameters
were previously uploaded.
Important:
If a device with an EDID (e.g., a video processor) is installed between the RX and
destination monitor, the Scaler Override utility will read the EDID for that device. If this happens,
you will probably need to set a custom resolution.
Note:
When the following timings are in the EDID data, the Scaler Override utility will not display
them: 720x400 @ 70 Hz, 720x400 @ 88 Hz, 640x480 @ 67 Hz, 832x624 @ 75 Hz, and
1152x870 @ 75 Hz. These timings can be entered in the utility as custom resolutions.
PC Requirements
  Windows XP Professional
®
  Minimum Hardware: 166 MHz, 128 MB RAM, 20 MB free disk space*, 800x600 display
 Recommended Hardware: 2.0 GHz, 512 MB RAM
  USB port**
* The installation process requires 20 MB of disk space for the Scaler Override installer. Once installed,
the tool requires 5 MB of disk space.
** For DGX Fiber modules, the USB port is used as a virtual COM port for serial communication.