Grass Valley Trinix NXT v.3.3.1 - Manual (Page 200)

200 Trinix NXT — Installation and Service Manual
Section 3 — Hardware Installation
Output Monitoring
Output monitoring allows verification of Routing switcher performance
without interrupting normal operations. A separate internal switching
system is used to switch the Monitor Output to any output of the Routing
switcher.
Using a control panel, the operator picks an output as usual—in this case,
the Monitor Output. The operator then selects an input, but this input is
actually one of the Routing switcher outputs.
With the TRX-NXT-128x128 and TRX-NXT-256x256 frames, two pairs of
output monitor ports are provided by the NR-33000 board (one side of each
pair is inverted). Two additional dual ports are optionally available when
a second NR-33000 is added; this provides four monitor ports.
Monitoring Ports
The TRX-NXT-128x128 frame, output monitoring come from NR cards (two
each).
The TRX-NXT-512x512 frame, the SR-33500 Sync/OPM board provides
four monitoring ports.
The TRX-NXT-512x1024 frame, the two TRX- OPM boards provides cas-
cading inputs and four monitoring ports.
The TRX-NXT-256x512 frame, the TRX-SR Sync/OPM boards provides
four monitoring ports.
The TRX-NXT-128x256 frame, the TRX- OPM boards provides four moni-
toring ports.
Symmetrical Frames
For Trinix Symmetrical frame configurations that require multiple frames,
the monitor signals are brought through a Port expander that is used as a
combiner (see
page 208 ).
Asymmetrical Frames
For Asymmetrical configurations that require multiple frames, the monitor
signal is cascaded from the expansion frames to the main frame via the
TRX-SR or TRX-OPM output monitor inputs (see
Figure 115 on page 202
for details). The Monitor Inputs are the bottom four connections.
The TRX-SR is used on the 256x512 frame and the TRX-OPM is used on the
128x256 and 512x1024 frames.
Examples of basic monitoring connections are shown below.