ATI Technologies ADA416PH Betriebs- und Wartungshandbuch - Seite 6
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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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