ATI Technologies DA416 Operating And Maintenance Manual - Page 4

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ATI Technologies DA416 Operating And Maintenance Manual

Audio inputs and outputs should be connected using the rear panel labels as a

guide. HI outputs are all in phase with each other and in phase with the HI inputs.

CAUTION

Your 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 600ohm 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 DA with a 600ohm 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 DA 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 DA

and medium level console inputs to allow the DA to operate at a high enough

output level to maintain a good signal to noise ratio. Your DA 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.

MAINTENANCE

Power supply voltages are + and - 15VDC nominal.

IC output DC Voltages under no signal; shorted input conditions should remain

within .1V of ground. Greater deviation is an indication of IC or circuit problems.

MODIFICATIONS

230 VAC OPERATIONS

Your DA is wired for 115 VAC, 50/60Hz operation unless otherwise requested at

the time ordering. It can be modified for 230 VAC operations by removing the

power transformer primary jumpers J3 and J5 and inserting a jumper in J4.

Different types of attachment plug or line cords may be required for connection to

alternate supply voltages.

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