ATI Technologies ADA208PH Manual de operação e manutenção - Página 6

Procurar online ou descarregar pdf Manual de operação e manutenção para Amplificador ATI Technologies ADA208PH. ATI Technologies ADA208PH 11 páginas.

CAUTION

The Distribution Amplifier has active drivers for both HI and LO output terminals. DO NOT

GROUND either HI or LO terminals. If you are driving a single-ended (unbalanced, one side

grounded) high impedance or 600 ohm load, it should be connected between either HI to

GND or LO to GND. If you are driving a balanced load, connect it between HI and LO output

terminals. It is generally unnecessary to terminate the ADA with a 600 ohm load if it is driving

a high impedance input, although placing a terminating resistor across a hi-Z input at the

receiving end will occasionally reduce RF pickup.

ADJUSTMENTS

It is sometimes difficult to maintain good noise performance when using a ADA to drive medium

level console (-20dBm) or IHF (.1V) equipment inputs. You may have found it necessary in the

past to insert attenuator networks between a ADA and medium level console inputs to allow the

ADA to operate at a high enough output level to maintain a good signal-to-noise ratio. The ADA

will reduce its already low output noise still further as you turn down its gain. In the absence of

high RF fields, you can distribute input signals as low as -20dBm to multiple loads at 0 to

-20dBm levels.

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