Extron electronic GLI 1000 5BNC Introductionstallation, Installation, Rack mounting, Hum bars

Introductionstallation

The GLI 1000 family of ground loop inhibitors (GLIs) eliminates the hum bars and common mode noise associated with improper video equipment grounding (figure 1). Ground loop problems can be caused by using AC power sources with different ground levels or by plugging high current equipment into the same power source as video equipment.

Installation

Installation consists of mounting the GLI and making connections.

Rack mounting

The GLI 1000 5BNC and GLI 1000 15HD are one third of a standard rack in width and 2U high. Up to three of these units can be mounted to the rear of a flat 2U rack panel (figure 2) or the front of a recessed 2U rack panel using four 6-32 x 3/8 screws.

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GLI 1000 2RCA

10005BNC

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Figure 1 — Hum bars

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GLI

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GLI 1000 2BNC

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GLI 1000 15HD

The GLI 1000 family consists of the following four models:

•GLI 1000 5BNC — The GLI 1000 5BNC has five female BNCs on the input and five on the output. This GLI cleans ground noise from RGB or component video. It can also be used for one or two S-video signals or up to five composite video signals.

•GLI 1000 15HD — The GLI 1000 15HD has a female 15HD connector on the input and another on the output. This GLI inhibits ground loops on VGA, XGA, and UXGA video. With an adapter cable, it can be used for S-video signals or composite video signals.

•GLI 1000 2RCA — The GLI 1000 2RCA has two female RCA connectors on the input and two on the output. This GLI removes ground problems from one or two composite video signals. With an adapter, it can also be used with S-video.

•GLI 1000 2BNC — The GLI 1000 2BNC has two female BNCs on the input and two on the output. This GLI inhibits ground loops on S-video. It can also be used for one or two composite video signals.

The passive, non-powered, GLIs have a 1.0 GHz (-3dB) bandwidth, and can handle any video format. Guardrails protect the GLI connectors from damage caused by rough handling. With optional mounting brackets, the GLIs can be mounted to a projector mount or under a desk. The GLIs can also be mounted to optional 1U or 2U rack panels.

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GLI 1000 5BNC

Ground Loop Inhibitor

Figure 2 — Rack mounting the GLI Inhibitor

The GLI 1000 2RCA and GLI 1000 2BNC are a quarter of a rack in width and 1U high. Up to four of these units can be mounted to the rear of the flat1U rack panel or the front of the recessed 1U rack panel.

A mix of larger and smaller GLIs can be mounted on either 2U panel, for example, two GLI 1000 15HDs, a GLI 1000 2RCA, and a GLI 1000 2BNC. Another example is one GLI 1000 5BNC and four GLI 1000 2BNCs.

Bracket mounting

Secure the optional mounting bracket to the GLI using four #8 machine screws already installed in the side of the GLI. Secure the GLI to a projector mount or other surface by inserting the mounting screw through the bracket’s slotted hole (figure 3).

Under table mounting

1. Secure both optional mounting brackets to the GLI with eight #8 machine screws already installed in the side of the GLI (figure 4).

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