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11
COMPOSITE OUTPUT
The unbalanced
COMPOSITE OUTPUT
of the Inovonics 708 has a
resistive source impedance of 75 ohms. This permits runs of moderate
length (about 50 feet, maximum) to the exciter or microwave link input.
If the cable length is more than just a few feet, the cable should, itself,
have a 75-ohm characteristic impedance and be terminated in 75 ohms
at the far end.
A Stereo Generator must always be connected to an exciter or link (STL)
input specifically intended for multiplex stereo. This is a “flat” input,
rather than a monaural program input with signal pre-emphasis.
Program signal pre-emphasis is imparted by the 708.
Output Ground
Loops
Because the Stereo Generator output and the exciter input are both
unbalanced, it is best to locate the 708 near the exciter and power both
from a common AC mains circuit. This will help avoid ground loops
and mains-related hum in the transmitted signal.