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To capture custom EDID:
Step 1.
Exit fullscreen mode or quit the Mbox application.
Step 2.
Open System Preferences > Displays pref pane.
Step 3.
Connect monitor to preview output connector of the I/O Module output section that not being used for EDID
capture. Disconnect all VGA or DVI display devices from the output connectors of the output section that
will capture EDID.
Step 4.
On the output section that will capture EDID, reconnect only the device to capture EDID data.
Step 5.
Set both Blackout and Preview Dim switches to their "Yes" position:
Step 6.
Flip momentary EDID Capture switch to the right and hold in position.
a. The indicator LED will flash rapidly for four seconds. During this time, the switch can be released and no
capturing action will take place.
b. The indicator LED will stop flashing and will illuminate. During this time, the EDID set is being captured.
c. The indicator LED will start flashing slowly. The EDID has been captured.
Step 7.
On the Mac Pro computer's System Preferences > Displays pref pane, hold down [option] and click on the
Detect Displays button. Confirm that the pref pane header now shows the name of the device that EDID was
captured from.
Step 8.
On the Displays pref pane, select the desired resolution and frequency, clicking on the Scaled radio button to
find additional resolutions as required.
Step 9.
Relaunch the Mbox application, set it to window mode if necessary. On the Outputs tab, confirm that the
display now shows the new resolution and frequency.
WARNING!
If the indicator LED does not illuminate solidly (as in Step 6b) then no EDID has been captured from the
connected device. Confirm that the device is connected to one of the DVI/VGA connectors, that a working cable is
being used, and that the device does have EDID capabilities. Many DVI to Optical Fiber extenders do not transmit EDID!
Possible Issues with EDID and the I/O Module
Because the Dual I/O Module is the only source of EDID to the computer, it is possible that the formats in that EDID
result in an output resolution or frequency that a connected display device does not support. This can occur when
using devices with resolutions lower than 1920 x 1200, or devices that do not support refresh frequencies lower than
50Hz. If a connected display device does not show an image or shows an error message (e.g. "Resolution/Frequency
Not Supported"), then either a different display device is required, or the EDID needs to be changed or captured from the
connected device. If the resolution/frequency has been set to a mode where the display device cannot show an image,
neither the computer's desktop nor the Displays pref pane will be visible. Refer to the steps below to resolve this issue.
Desired EDID Set
Stage Blackout Switch
Capture from DVI/VGA
EDID Capture Switch
To Right
Preview Dim Switch
YES
YES
YES
NO
YES
MBOX® 2016 DUAL OUTPUT HARDWARE MANUAL
NO
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