Cobalt Digital COMPASS 9374-EMDE Quad-Stream SDI – AES – MADI Embedder_De-embedder - Manual (Page 32)

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9374-Series Analog Audio Output
2-10 9374-SERIES PRODUCT MANUAL 937X-OM (V1.3)
9374-Series Analog Audio Output
The unbalanced “RCA” audio outputs on this card correspond to 2.2Vrms
output when sourced from a unity-gain 0dBFS digital sine-wave source.
Consumer audio is specified in dBV with a nominal (or recording) level of
-10dBV. The 2vrms maximum output level corresponds to +6dBV. The
unbalanced analog outputs on this card allow for 16dB of headroom above the
nominal -10dBV consumer level (“headroom” is the range between the
maximum and nominal audio levels).
Professional balanced analog audio levels in the US typically use a +4dBu
nominal level with 20dB of headroom (-20dBFS). The maximum level for
balanced analog interfaces is +24dBu.
The headroom difference between consumer and professional audio will
result in a lower RCA consumer level when converting from professional
balanced analog audio. For example, if pro level analog audio is received and
transmitted via AES or embedded SDI to a receiver converting to RCA
analog audio, the output will be 4dB lower, with a nominal level of -14dBV.
The analog audio outputs on this card are designed as a monitor convenience
output, and are suitable for direct application with rack-mounted monitors or
powered monitor loudspeakers. If connected to a professional balanced input,
the center RCA conductor should be connected to XLR pin 2 (hot), and the
shield conductor should be connected to XLR pin 1 (GND); pin 3 can be left
open. Alternately, the center and ground RCA output conductors can be
connected to XLR pins 2 and 3, respectively with the drain (shield) conductor
connected to the receiving equipment chassis ground, and left open at the
9374-series card.
Setting Up 9374-Series Card Network Remote Control
Perform remote control setup in accordance with Cobalt ® reference guide
“Remote Control User Guide” (PN 9000RCS-RM).
Note: • If network remote control is to be used for the frame and the frame has not
yet been set up for remote control, Cobalt ® reference guide Remote
Control User Guide (PN 9000RCS-RM) provides thorough information and
step-by-step instructions for setting up network remote control of
COMPASS™ cards using DashBoard™. (Cobalt
® OGCP-9000 and
OGCP-9000/CC Remote Control Panel product manuals have complete
instructions for setting up remote control using a Remote Control Panel.)
Download a copy of this guide by clicking on the
Support>Documents>Reference Guides link at www.cobaltdigital.com
and then select DashBoard Remote Control Setup Guide as a download, or
contact Cobalt
® as listed in Contact Cobalt Digital Inc. (p. 1-18).
• If installing a card in a frame already equipped for, and connected to
DashBoard™, no network setup is required for the card. The card will be dis-
covered by DashBoard™ and be ready for use.