User Guide – PERC2000 System Controller
Publication 81-9059-0605-0, Rev. B
November 2010
Proprietary Information of
PESA PESA 8-38
Suppose you have a switching application where an analog video source needs to be available
as an analog output, and also converted by external equipment to a digital signal and be
available from a digital video level in addition to the analog output. In order to implement such
an arrangement we would like to have a dedicated output from the analog level named Video
and a dedicated input to the digital level, in this example named SDI. The video conversion
equipment is physically inserted between the dedicated physical output from Video and the
dedicated physical input to SDI. Whenever we select one of the analog sources on Video as the
desired output to one or more of the SDI destinations the controller will transparently switch
the analog source to our dedicated output from Video, through the conversion equipment and
apply the converted digital signal to our dedicated input of SDI, where that input is switched by
SDI to the selected destination output of SDI. This actual physical connection made between
the two switching levels is the physical portion of a tie-line. In addition, we have to configure
the controller to recognize the tie-line by programming the level name and physical connection
of the signal output and input, and assign an identification name to the tie-line – this is done by
the Tie-Line configuration screen, Figure 8-39.
Figure 8-39 Tie-Line Configuration Screen
8.9.8.1 Engineering Name, Nickname and Name
In the case of the tie-line, PESA recommends that you choose a name that is descriptive of the
function of the tie-line. The name you assign is not used on other status screens and is not used
or seen by an operator. In this example, notice that there are four tie-lines used in this system.
The name NTSCSDI1 is chosen to signify the first of two tie-line connections dedicated
between an output (destination) of NTSC analog video from the level named Video and an
input (source) of digital SDI compliant video to the level named SDI. In similar manner, the
name SDINTSC2 signifies the second of two tie-line connections dedicated between an output
(destination) from level SDI and an input (source) to level Video. Each of the name fields is
discussed below:
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