Grass Valley NV8500 Series v.3.5 - Manual (Page 65)

49
NV8500 Series
User’s Guide
one output to the motherboard, which in turn forwards the signal to a monitor card. (See Moni-
toring on page 89.)
The following diagram shows the flow through AES async I/O cards. The crosspoint card uses its
crosspoint matrix for routing AES signals to AES output cards. The TDM matrix (shown for refer-
ence) is used only for hybrid audio signals.
Fig. 2-16: AES Async Signal Flow
HD or 3Gig (Standard)
Standard 3Gig I/O cards are available in coax or fiber versions.
Standard HD cards are available in coax versions only.
Video signals require a video reference for proper switching. See Making Reference Connections
on page 61.
Any embedded audio signals are passed, unmodified, through the router to output.
Reclockers on the output card may be turned “on” or “off” using the Miscellaneous Settings
page in MRC. Reclockers are only available for coax signals, not for fiber optic signals. For more
information, see the Miranda Router Configurator User’s Guide.
Input
For all NV8500 routers except the NV8140, the standard HD input card and the standard 3Gig
input card can receive 9 video signals. For the NV8140, the standard 3Gig input card can receive
18 video signals.
Ports on the HD card can receive either SD or HD; ports on the 3Gig card can receive SD, HD, or
3Gig. Each card has a cable equalizer for each port that distributes the signal to the mother-
board. The motherboard forwards the signal to the crosspoint cards for distribution to output
cards. An incoming signal can be distributed to any or all video outputs, except that 3Gig signals
cannot be routed to HD outputs. The card also distributes the signal to a monitor selector for
forwarding to a monitor card. (See
Monitoring on page 89.)
Output
Ports of the standard HD output card accept either SD or HD; ports of the 3Gig output card
accept SD, HD, or 3Gig signals. Each output card receives 18 signals from a crosspoint card (via
the motherboard). Each of the 18 ports has a re-clocker. The re-clocker creates two copies of the
signal, feeding one copy to a cable driver and one copy to a monitor selector. The cable driver
9 AES Async AES
Receiver
Monitor
Selector
18 mono
to Monitor
Card
Crosspoint
Matrix
TDM
Matrix
18 AES Async
Monitor
Selector
18 stereo
AES Transmitter
to Monitor
Card