Gai-tronics 370-202, 372A Interface Amplifier Assembly for Ele Manual de usuario descargar pdf (Pagina 6)

Pub. 42004-374A

Model 370-202 Interface Amplifier Assembly for Electro-Sound Page: 6 of 9

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One-Way Operation

If the Model 370-202 Interface is only used for one-way communication, jumper wires located on the

Model 370-202 two-way amplifier printed circuit card (69056-002) can be removed to improve amplifier

stability and performance.

If the Model 370-202 is used for one-way communications ONLY, complete the following adjustments:

1. For Electro-Sound system to the GTC system, cut Jumper W-4.

2. For the GTC system page line to Electro-Sound system or central amplifier, cut Jumper W-3.

When the Model 370-202 is operated in a one-way mode, the BALANCE control will have no effect on

operation. When W-4 is cut, only the LINE

TO GTC control will be functional. The GTC TO LINE

potentiometer will be active if W-3 is cut.

Model 370-202 Applications

In Figure 3, a Model 370-202 Interface allows the following options:

• paging to be initiated by either a Page/Party

station or a three-wire Electro-Sound system

• two-way party line communication to occur at a prearranged time

Further, where a three-wire Electro-Sound system (Electro-Sound with paging) is installed and more than

ten Page/Party

speaker amplifiers, (650 Series), are used to power the speakers, a Model 370-202

Interface is required. See 42004-072, the Electro-Sound Communications System installation manual, for

more information.

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Gai-tronics 370-202, 372A Interface Amplifier Assembly for Ele Manual de usuario Pagina 6