VISTEK V6333E/D & V6333Q/D
hd/sd sdi digital audio multiplexer
16
Issue 5
3.7.5
Output EDH
EDH is a method of embedding data within the ancillary data space which carries a measurement of the
video and other data. By regenerating the equivalent measurement at the receiving end it is possible to
check that the data has been received correctly.
HD signals always have the EDH data embedded, but for SD signals it is optional. On the V6333 Audio
multiplexer, the EDH on the output can be disabled on the
ENG’ING
:
O/P EDH
menu. Care must be taken
if the new EDH generation is disabled and the old EDH is being passed through because it will probably not
correctly represent the data. In this case the Ancillary Data really ought to be blanked. (On early units the
ancillary data is always blanked.)
3.7.6
Display Sleep
Since, for the vast majority of its life, the modules will operate behind the front panel of a rack frame the
display on the local front panel will not be visible so it will go to sleep after a certain time. This timeout
delay can be changed on the
ENG’ING
:
Sleep
menu to be anything between 0 and 30 minutes; 0 minutes
means that it will stay on indefinitely. The sleep timeout always counts from the last front panel button
push. The default time is 5 minutes.
The panel can also be forced into its sleep mode by moving up a level from the Top Level menu which
displays the module type,
V6333Q/D
etc.
To get the display to come on again simply press one of the buttons and the menus will start again at the
Top Level.
3.7.7
Display Brightness
The brightness of the front panel display can be adjusted on the
ENG’ING
:
LEDLevel
menu.
3.8
Configuration Menu
The GPI functionality can be enabled in the configuration menu. Apart from the GPIs it does not any
operator functions. It is mainly used for factory initialisation of the module.
3.8.1
GPI Configuration
There are four GPIs. They are all active low with on-board pull-ups and voltage protection.
Each of the four GPIs can be configured to switch the SDI input selection to the second input when active,
or the GPI can be disabled.
