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Section 30: Outputs Tab
Figure 84: Codec PPM Meters
30.1.2. Setting Commander G3 Field Unit Audio Levels
On the field unit COMMANDER G 3, codec audio levels are displayed on the
LCD screen. Set your levels so that audio peaks average at the first solid bar.
This represents a program level of +4 dBu leaving the codec. Audio peaks
can safely reach +21 dBu without clipping. We recommend that you adjust
levels so that peaks don’t exceed +16 dBu on all Tieline codecs (indicated by
the red LEDs on the COMMANDER G 3 rack and the i-Mix G 3 codecs, and
the fourth solid LED on the field unit codec LCD).
+21 dBu
17 dBu headroom before clipping
+4 dBu
(0 vu reference level)
-0 dBu
(-4 vu reference level)
Figure 85: Diagram Showing Codec Headroom
The preceding diagram shows the amount of operating headroom the codec
has. If you put 0 vu into the codec, when the codec input digipot is set at the
one o’clock position, the nominal operating reference level is 0 vu. An
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