Grass Valley 8920DAC - Manual (Page 16)

10 8920DAC Instruction Manual
8920DAC AES/EBU to Analog Audio Converter
Level Adjustment
The gain stage of each output channel (right and left) has two means of
adjustment—fine and coarse (refer to
Figure 5 on page 9 ).
The Coarse jumpers (JP6 and JP7) select the range of adjustment either:
■ High range—19 to 24 dBu, or
■ Low range—14 to 20 dBu.
Fine control within those ranges is set using the multi-turn potentiometers
(Left and Right Fine Adj.) providing ±3 dBu gain adjustment (do not exceed
24 dBu). This combination gives a maximum range of full-signal settings
from +14 dBu to +24 dBu.
20/24-bit DAC Operation
Jumper block JP5, pins 1 to 3, determine whether the DAC is in 24-bit or
20-bit mode (see
Figure 5 on page 9 ). With the jumper across pins 1 and 2,
the DAC is in 20-bit mode and will mask the lower four bits of information.
With the jumper across pins 2 and 3, the DAC is in full 24-bit mode.
Remote Control Lockout
When a jumper is placed across pins 5 and 6 of jumper block JP1, module
output mode settings are adjustable from the on-board switches only. To
have both Local and Remote access, set the jumper across pins 4 and 5 (see
Figure 5 on page 9 ).
7 Left + Right to both channel outputs (-6dB mono sum)
8 Left - Right to both channel outputs
9 Left + Right to Left channel output and Left- Right to Right channel output
A Left + Right to both channel outputs and both channels phase inverted
B Not Used (Digital Silence)
C Not Used (Digital Silence)
D Tone 1 to all channels (Digital Silence)
E Tone 2 to all channels (1 kHz, -20 dBFS)
F Factory default – No phase inversion, channel swapping or summing
Table 4. 8920DAC Output Mode Configuration
Switch
Position
Mode Description