Grass Valley NVISION Compact CQX - Manual (Page 96)

84 Rev 2.0 • 29 Mar 10
12. Tutorials
Products
The video routers perform input equalization and, except for the -NR models, perform reclocking
of outputs. The -NR models do not perform reclocking. Router outputs are switched in sync with an
external video reference if it is present.
All digital video routers accept bi-level or tri-level video references (sync) and switch according to
SMPTE RP168-2002.
3Gig Video Routers
All of the “3Gig” routers support 2.966Gb/s, and 2.97Gb/s video rates as well as a number of HD
bit rates and formats. The 3Gig routers reclock at 270Mb/s, 1.483Gb/s, 1.485Gb/s, 2.966Gb/s, and
2.97Gb/s. The 3Gig routers bypass re-clocking for other rates. Video references must be nominally
800mV p-p and bi-level or tri-level in nature.
HD Video Routers
All of the “HD” routers are SWB (super wide band) routers: they support a wide range of SD and
HD bit rates and formats, from 10Mbps to 1.5Gbps. With the exception of the -NR routers, the HD
routers reclock at 143, 177, 270, 360, and 540Mb/s and 1.483 and 1.485Gb/s and bypass re-clock-
ing for other rates. Video references must be nominally 800mV p-p and bi-level or tri-level in
nature. The HD routers support DVB-ASI signals.
SD Video Routers
All of the “SD” routers support a wide range of SD serial data rates from 10Mb/s to 540MB/s.
With the exception of the -NR routers, the SD routers reclock at 143, 177, 270, 360, and 540Mb/s.
The SD routers support DVB-ASI signals.
NR Video Routers
The HD and SD routers are available in non-reclocking models, such as the CR1616-HD-NR and
CR3204-SD-NR. These models are less expensive than the models that have reclocking circuitry
and work well with relatively noise-free signals. The reclocking models give better performance in
noisy environments.
CQX Video Routers
These 1RU digital video routers have two crosspoint matrices. The first crosspoint routes 16 nor-
mal inputs either to an internal mixer or to the second crosspoint matrix.
The mixer has 2 channels. Each channel mixes two inputs and produces an internal “clean” output.
One of the inputs is the signal previously routed to that channel and the other input is the signal that
will be routed to that channel. The mixer produces the transition between the previous input and the
next input according to the transition type and transition rate currently selected (at a control panel)
for the router.
The second crosspoint matrix receives internal signals and produces the CQX outputs 1 and 2 and 6
auxiliary outputs (which are normal outputs). A multiplexer selects either the clean output or the
bypass input. The bypass input is selected only when power fails. (The multiplexer is controlled by
a relay that switches to its relaxed position when power fails.)
The router has 16 normal input BNCs, 2 bypass input BNCs, 2 CQX output BNCs, and 6 aux out-
put BNCs.