OmniTek Ultra 4K Tool Box, Руководство пользователя

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------------------------------- General: Automated Control --------------------------------
Ultra v2.0a User Guide
C-5
It is important to appreciate that the data displayed by the MIB Browser will be a snapshot of the
settings of the different parameters at the time the data was obtained. Data may be automatically
updated when it goes out-of-range but most values will remain unchanged. Your MIB Browser
can be expected to offer a Refresh option. It will typically also be able to distinguish between
parameters that are Read Only and those that are Read/Write, and offer you the option of changing
the setting of Read/Write parameters from within the MIB Browser.
Note: As you look through the range of data displayed, you may notice both parameter values in
addition to the ones shown by the
Ultra
application and options that you see on the screen that
don’t appear supported for access under SNMP. For example, the Jitter Spectrum display will only
ever list six peaks in its peak table but SNMP gives you access to ten highest peaks. If there are
facilities that you want to use but do not know how to access from SNMP, please contact Omnitek
Customer Support ( support@omnitek.tv ).
C.4 Automating a Test Procedure
The value of the access provided using SNMP is in freeing test engineers having to make the
various detailed selections involved in running your chosen equipment test. By automating the
various selections involved, the engineer becomes free to concentrate on spotting where problems
arise.
While the OIDs used by SNMP appear complex, the task of programming the actions you want
carried out is straightforward.
A common approach to take is to use one of the SNMP command libraries that are available (in
some cases, for free) within a programming environment such as that offered by Microsoft Visual
Studio. A simple example showing the type of commands used is available to registered users to
download from the Downloads page of the Omnitek website ( www.omitek.tv/download ).
SDI Output Video Standards and SNMP
HDMI and DisplayPort Video Standard IDs are simple numbers: the corresponding IDs needed
to set SDI Output Video Standards are exceedingly complex as can be seen from the following
table, which gives the IDs for a selection of video standards.
Table C-1:
Video Standard IDs for a selection of SDI Video Standards
SDI Video Standard ID
SD 720x486i 59.94Hz -2130313215
HD 1920x1080i 59.94Hz -2063204351
3G A 1920x1080i 59.94Hz 10Bit 4:4:4 YUVA -1996094207
3G B-DS 1920x1080i 59.94Hz -1945763839
3G A 1920x1080p 59.94Hz -1983250431
6G 3840x2160p 23.98Hz -1061027839
The easiest way to determine the IDs you need for the video standards you want to select is to
use the Connections window on the Ultra to set the video standard for the SDI Outputs to each
of the video standards you require in turn and use your MIB Browser to read off the
corresponding smpteId value.