Grass Valley Acappella v.3.2.4 User Manual
Page 119
Acappella — Instruction Manual
119
Audio Specifications
Analog Audio Outputs
Signal Type
Balanced Analog Audio
Connector
6 position friction clamp connector for channel pair
(+,-,GND,+,-,GND)
Max Output Level
(System is voltage mode and not designed to
support more than three outputs loaded with
600 Ohms.)
+24dBu Balanced, 10k Ohm Load (no cable)
+18dBu Unbalanced, 10k Ohm Load
(no cable, one of the outputs grounded)
+24dBu Balanced into 600 Feet Belden 8451 cable + 600
Ohms. Capacitance of cable equivalent to 0.022uF.
Output Impedance
<= 25 Ohms Differential
OCMR (Output Common Mode Rejection)
>=46dB
DC on Output Differential
<= +/- 50mV
Analog Audio Performance
Gain
Unity (0dB)
THD+N
<0.01%, 20Hz – 20kHz
IMD (SMPTE 4:1)
<0.01%, +24dBu, 600 Ohm/Hi Z load.
Crosstalk
>83dB isolation, 20Hz – 20kHz, all hostile
Frequency Response
20Hz-20kHz +/-0.1dB @1kHz
-3dB @200kHz with smooth roll-off after 200kHz
Noise (22kHz un-weighted, RMS)
-85dBu
Gain Error
+/- 0.1dB typical, +/- 0.25dB max,
with 10k Ohms or larger load
Table 14. Analog Audio Specifications - (continued)