ATI Audio DA208 - Manual (Page 4)

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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 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 DA
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 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, 50/6OHz 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. Units supplied with a
-230VAC suffix have had this wiring change made at the factory.
Different types of attachment plug or line cords may be required for connection to
alternate supply voltages.