Grass Valley NV8500 Series v.3.5 - Manual (Page 77)

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NV8500 Series
User’s Guide
If you have different references (e.g., NTSC and PAL), or dual references, switches can take place
according to one or the other reference.
You can specify, in MRC, whether your video reference connection is redundant or dual.
(See the Miranda Router Configurator User’s Guide.)
Switch points use references based on priority, as follows:
Making Reference Connections
AES reference connections require a stable audio signal source set at 48 kHz. Video reference
connections require a stable source of PAL, NTSC, or tri-level sync. The control card uses these
references to perform takes at the proper point in time (according to SMPTE RP168).
Making AES reference Connections
1 Locate the AES reference connections on the rear of the router, as shown in Figure 2-22. AES
reference connections are labeled AES REF 1 and AES REF 2.
Fig. 2-22: AES Reference connection (Rear View
2 Connect AES REF 1, using a 75 W BNC cable, to a stable 48 kHz audio source.
3 For redundancy, also connect AES REF 2 to a stable 48 kHz audio source.
Reference First Second Third
Redundant VIDEO REF 1 VIDEO REF 2 Internal free running. Such signals are passed
through the router even though not locked to
a reference.
Dual VIDEO REF 1
or
VIDEO REF 2
Internal free run-
ning -n/a-
AES Reference Con-
nectors