Page 26
G2
Operators Manual
Operating Notes
Operating Level
With any audio signal processing equipment it is necessary to ensure adequate signal
level is used through the device, to avoid sacrificing noise performance. It is suggested
that the operating level chosen should give adequate level to just light the +12dB
LED on the headroom meter with maximum program level being used. Since the
meter is deliberately set to show clipping 3dB early, this still provides 9dB of
headroom before clipping occurs. It should be noted that the figure quoted for the
maximum input level options is the clipping point for that option (not a safe operating
level). Always ensure that this clipping point is no lower than that for the following
equipment in the signal chain, and allow extra margin if equalisation sections are
boosted.
Grounding
The Screen (shield) pins on all audio connectors are normally connected directly to
the ground pin of the IEC mains inlet. The chassis is also directly connected to this
pin. Never operate this unit without the mains safety ground connected. Signal
ground (0V) is in turn connected to the chassis ground.
To avoid ground loops, cable shields should be connected to ground at one end only.
The normal convention is that the shield is only connected at the output XLR.
Provision is also made for separately isolating each input and output shield pin
permanently within the
G2
by breaking the appropriate PCB track, where marked
with a box and an arrow next to each XLR connector using a small drill bit or cutter.
See the following diagram for details.
XLR pin 1 Isolation points (arrowed) and 10dB pads (circled)
Содержание G2
Страница 1: ......
