Grass Valley NV7512 v.1.3 - Manual (Page 79)

NV7512 Audio Router • User’s Guide 69
2. Installation
Making Reference Connections
2 Locate the MADI reference connections on the MADI outputs backplane on the rear of the
router, as shown in Figure 2-29 on page 68), labeled ‘REF 1 OUT’ and ‘REF 2 OUT’. Refer-
ence connections are located on backplane housing the MADI signal connections. Outputs are
located in the lower half of the router frame.
3 Connect to the ‘REF 1 OUT’ connection using a 75 Ω BNC connector and coaxial cable.
4 Connect the other end of the cable to a source of stable AES audio signals at the rate you want
to reference.
5 Repeat steps 3 and 4 for the ‘REF 2 OUT’ connection.
Video Reference
The NV7512 provides timing reference connections for analog video signals. The video reference
connections require a stable source of PAL, NTSC or Tri-level sync. The video reference connec-
tions are labeled ‘VIDEO REF 1’ and ‘VIDEO REF 2’ and use 75
Ω BNC connectors and coaxial
cable. For more information on signal switching when a reference is or is not present and a detailed
description of the video reference connections, see
Video Reference Connections on page 18.
Each ‘VIDEO REF’ connection can be use the same reference source (redundant for backup should
one source fail) or two unique reference sources (dual). For more information, see
Redundant and
Dual References on page 19.
Video reference connections can use a loop-thru to connect to other routers. Terminate any unused
‘VIDEO REF’ connections using a 75
Ω BNC terminator.
How to make video reference connections
1 Locate the video reference connections on the rear of the router, as shown in Figure 2-30. Video
reference connections are labeled ‘VIDEO REF 1’ and ‘VIDEO REF 2’.
Figure 2-30. Video Reference Connections (Rear View)
2 Connect to the ‘VIDEO REF 1’ connection using a 75 ΩBNC connector and coaxial cable.
3 Connect the other end of the cable to a video reference signal. Be sure the incoming signal is
from a stable source. The signals can be:
PAL
NTSC
Tri-Level Sync (1080i 50/59.94/60 and 720p 50/59.94/60)
4 Connect to the ‘VIDEO REF 2’ input connection, as described in Steps 2 and 3. The reference
can use redundant or dual sources. For more information, see Video Reference Connections on
page 18.
5 Important! Terminate any unused video reference loop-thru connection by installing a 75 Ω
BNC terminator.
Video Ref
Connections
VIDEO
REF 1
VIDEO
REF 2
LOOP
THRU