READ M E!
D-70 / Oct 2000
Audio Reference Levels
All consoles are fully factory calibrated and will comply with the following reference
level:
-20dBFS digital = +4dBu analog = 0VU Note: 0dBu = .775v rms
+4dBu = 1.23v rms
These settings will provide a headroom of 20dB over the nominal input signal of +4dBu
analog, or -20dBFS digital. Should your facility require a different A-D - D-A reference
level please consult the factory for calibration details and/or alternate solutions.
Note that due to the lack of level standards in the digital domain, headroom available
for digital sources will be entirely dependant on the source. In fact, CD's are frequently
made with less than 1dB of digital headroom, and any boosting of digital CD levels in
the console by moving the fader up above the nominal can result in overload distortion
for that channel. For this reason, the VDip set-up program allows for digital attenuation
on a fader by fader basis; digital sources can be conveniently attenuated this way to
guard against digital overload caused by not enough headroom on the digital source.
Since the D-70 console meters are true digital reading meters, they will always show
the console's digital levels, and whether there are any "overs" in the signal. By pressing
a channel's "CUE" button, the switched meters will show the digital level of that
channel's source, as configured with the VDip program. By using the program and
watching these meters, the amount of attenuation can be adjusted to meet your
headroom requirements.
Typical Input Levels
Mic Inputs Nominal = -50dBm, 150Ω Maximum = -26dBm
Analog Inputs Nominal = +4dBu Maximum = +24dBu
Digital Inputs Nominal = -20dBFS Maximum = 0dBFS
IMPORTANT
To Next Page
Loading...
