PRG MBOX 2016, Руководство по оборудованию

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22 MBOX® 2016 DUAL OUTPUT HARDWARE MANUAL
CAUTION! Due to special timings in the built-in EDID sets that the I/O Module uses to generate SDI, some DVI or VGA
display devices may not work properly. If SDI output is required, use a monitor that works with those timings (e.g. Dell
2410). If no SDI output is required, capture EDID from the display device.
To output SDI from the I/O Module, the computer simply needs to be configured to use the appropriate resolution and
frequency settings and the I/O Module will then automatically output SDI at that resolution and frequency. As noted
previously, the I/O Module must be using one of the three built-in EDID sets to be able to generate SDI output. (Refer to
“Connected Display Devices and EDID” on page 15 for further info on EDID and frequency settings)
The Mbox application does not need to be running for the I/O Module to output SDI. In fact, with the Mbox v4 software
it is necessary that the computer’s display resolution and frequency be set in the System Preferences > Displays pref
pane before the Mbox application can be set to output that resolution and frequency.
When the I/O Module is outputting SDI, some connected VGA or DVI display devices may not be able to display images.
Newer DVI monitors provide the most compatibility, but due to the differences in hardware, compatibility cannot be
guaranteed. However, the two SDI output connectors on the I/O Module do act as Preview and Stage SDI outputs. SDI
A is the Stage output, and SDI B is the Preview output. The SDI Preview output allows an SDI monitor can be used as
the preview rather than a DVI monitor.
Note: Most SD-SDI monitors cannot display an HD-SDI signal, but HD-SDI monitors can display SD-SDI signals.
When the computer has been configured to output an SDI-compatible resolution and frequency, the SDI indicator LED to
the left of SDI connector A will illuminate. If the LED does not illuminate, then the I/O Module is not outputting SDI and
the selected EDID set and the resolution and frequency should be checked.
Because the Mbox v4 software requires the Mac desktop to run at the same resolution and frequency as the fullscreen
output for Mbox, when using SD-SDI output, the Mac desktop may be quite small. There are two possible workarounds
for this:
+ If using only one output, set the computer’s first output to a normal resolution and use the second output for Mbox.
+ If using two outputs, use Mbox Remote when changing settings.
The Dual I/O Module can output the following SDI formats:
+ SD - NTSC 480i (720 x 480) @ 59.94Hz (non-square pixels)
+ SD - PAL 576i (720 x 576) @ 50Hz (non-square pixels)
+ HD - 720p (1280 x 720) @ 59.94/60Hz
+ HD - 1080i (1920 x 1080) @ 50/59.94/60Hz
+ HD - 1080p (1920 x 1080) @ 23.98/24/25/29.97/30Hz
To get SDI output with a frequency of 24, 30, or 60Hz, the built-in 60Hz EDID set must be used. To get SDI output with
a frequency of 25 or 50Hz, the built-in 50Hz EDID set must be used. And to get SDI output with a frequency of 23.98,
29.97, or 59.94Hz, the built-in 59.94Hz EDID set must be used.
As noted previously, when using the I/O Module’s built-in 59.94Hz EDID set, the frequencies listed in the Displays
pref pane will not exactly match the frequencies mentioned above - 23.98, 29.97, or 59.94Hz. Instead, the available
frequencies will be shown as 24, 30, and 59.9Hz. Selecting 59.9 will result in an output frequency of 59.94Hz, and
likewise selecting 30 results in 29.97Hz output and selecting 24 results in 23.98Hz output. In the other two built-in EDID
sets, the selected frequency is the frequency that will be used.