Grass Valley Maestro Master Control Installation v.2.4.0 - Manual (Page 419)

MAESTRO Installation and Service Manual 419
Electrical
Audio Specifications
Audio Standard AES-1992 (r1997) 1999-11-23 printing
Dolby E
Pass through Standard
For NTSC, Dolby E Pass through is switched on line 10.
For PAL, Dolby E Pass through is switched on line 6.
Rear Panel Types 75 ohm (BNC connectors)
or
110 ohm (25-pin D connectors)
Audio Inputs
Signal Type 48 kHz AES3. All AES inputs will accept synchronous/asynchronous sig-
nals from 30 to 50 kHz sample rate. Dolby E must be synchronous with
video reference
Number and Type 4 stereo pairs, Background A
4 stereo pairs, Background B
4 stereo pairs, Audio Over A
4 stereo pairs, Audio Over B
4 stereo pairs, Monitoring
Audio Outputs
Signal Type 48 kHz AES3
Number and Type AES: 8 channels standard, each with Program, Clean Feed, Metering, and
Monitoring
Embedded: 16 channels, each with Program, Clean Feed, and Preset
MADI: 16 channels, each with Program, Clean Feed, Preset, and Metering
Analog Audio Requires external A-D/D-A converter
Embedded Audio SMPTE 272M (SD) and SMPTE 299M (HD)
AES Reference
Sample rate 48 kHz sample rate only. Use of AES reference is recommended for all
applications except Dolby E systems (Dolby E uses the video reference).
Using the AES reference preserves correct audio phasing in multi-channel
systems.
Connector BNC, looping, 1 V.
Note: when not in use, this connector must be terminated.
Control
LAN 10/100 Ethernet: 2 ports – one for facility LAN, one for control LAN
Console RS-232 Serial Two: One DB-9F connector port on rear panel, one at front edge of Proces-
sor PCB, connected in parallel
Automation RS-422 One DB-9F connector port
Tally Via GPIO port:
Source tally mode for Encore and Jupiter-controlled systems (16 contact
closures maximum). Current source required for each tally lamp; 24 V, 250
mA maximum.
Bus tally mode for Jupiter/MI-3040 systems (40 tally lights per MI-3040)
Router Control RS-422, One DB-9F connector port.
Meta Data Automatic switching of Dolby E metadata arriving with background audio A
and B to the Program, Clean Feed 1, and Monitor outputs. Note: the func-
tions of this connector are not yet implemented.
Table 18. Electrical Specifications