Grass Valley CR Series v.3.2 - Manual (Page 31)

19
CR Series
User’s Guide
 A control panel cannot and does not perform mono switching. It is only in external soft-
ware (CRSC, NV9000, or third-party software) that you can do that and then only when
the router is in synchronous mode (i.e., has a video reference).
• Asynchronous mode.
The router passes the input stream (32kHz–192kHz) transparently to the output with no
audio processing. The output is the same as the input and the output rate is the same as the
input rate.
Because the router does no audio processing, it performs stereo switching only.
AES routers power up in asynchronous mode. If a video reference is present, the router immedi-
ately switches to synchronous mode. If no video reference is present, the router stays in
asynchronous mode.
If a video reference is applied at any time after power-up, the router immediately switches from
asynchronous to synchronous mode.
Analog Audio Routers
The 1RU analog audio routers have 16×16, 16×4, or 8×8 crosspoints. The 2RU analog audio
routers have either 32×32 or 32×4 (stereo) crosspoints. Figure 2-22 shows a simplified view of
the analog video router:
Fig. 2-24: Block Diagram of the Analog Audio Router
The analog audio routers switch analog audio signals. Router outputs are switched in sync with
an external video reference if the reference is present and are switched asynchronously if no
reference is present.
The analog audio router passes input signals transparently to the output with no audio
processing or adjustments.
 Although the analog audio routers signals are stereo, the connectors are labeled as if the
signals were mono. A 16×16 router shows inputs and outputs numbered 1–32. A 32×32
router shows inputs and outputs numbered 1–64. An 8×8 router shows inputs and outputs
numbered 1–16.
IMPORTANT
When the router is in synchronous mode, and video reference is lost, the router waits 15
minutes (a “grace” period) before reverting to asynchronous mode. If you need to
switch from synchronous mode to asynchronous mode in less than 15 minutes, you can
cycle power to the router with the video reference disconnected.
M N
μP Logic
Inputs Outputs
Crosspoint
Switch
Control
Panel
Video Refer-
ence
Serial
Ethernet
(optional)
M = 8, 16 or 32
N = 4, 8, 16, or 32