Wordclock / Aes11Id Sync Input; Grounding; Power Ground - Orban OPTIMOD 6300 Operating Manual

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INSTALLATION

Wordclock / AES11id Sync Input

Grounding

Power Ground

on a signal with 15 kHz bandwidth and subsequent sample rate conver-
sion will not add overshoot caused by spectral truncation.
The sync input accepts a standard 5V p-p squarewave wordclock signal or an
AES11id (75Ω) signal, selected in software. A menu item allows you to synchronize
the output sample frequency to the frequency present at the sync. The connector is
a female BNC with the shell grounded to chassis.
To permit daisy-chaining sync signals, the input impedance is greater than 1 K. If
the 6300 is the last device driven by the sync coaxial cable, you should terminate it
by using a BNC Tee connector and a 75 BNC terminator. This will prevent perform-
ance-degrading reflections in the cable. This is required for both wordclock and
AES11id operation.
Very often, grounding is approached in a "hit or miss" manner. However, with care
it is possible to wire an audio studio so that it provides maximum protection from
power faults and is free from ground loops (which induce hum and can cause oscilla-
tion).
In an ideal system:

All units in the system should have balanced inputs. In a modern system with
low output impedances and high input impedances, a balanced input will pro-
vide common-mode rejection and prevent ground loops—regardless of whether
it is driven from a balanced or unbalanced source.
The 6300 has balanced inputs.

All equipment circuit grounds must be connected to each other; all equipment
chassis grounds must be connected together.

In a low RF field, cable shields should be connected at one end only—preferably
the destination (input) end.

In a high RF field, audio cable shields should be connected to a solid earth
ground at both ends to achieve best shielding against RFI.

Ground the 6300 chassis through the third wire in the power cord. Proper
grounding techniques never leave equipment chassis unconnected to power /
earth ground. A proper power ground is essential for safe operation. Lifting a
chassis from power ground creates a potential safety hazard.
ORBAN MODEL 6300