Orban OPTIMOD-FM 8600Si, Operating Manual

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OPTIMOD-FM DIGITAL INSTALLATION
2-15
GATE .................................................................................................... 12:00
RELEASE ............................................................................................... 12:00
VOICE ......................................................................................................OFF
AGC ..........................................................................................................ON
COUPLE ....................................................................................................ON
C) Feed the 8200ST either with tone at your system reference level (0VU), or with
typical program material at normal levels.
D) Adjust the
G
AIN
R
EDUCTION control for the desired amount of gain reduction.
We recommend 8-15 dB gain reduction for most formats.
If the STL uses pre-emphasis, its input pre-emphasis network will proba-
bly introduce overshoots that will increase peak modulation without any
increase in average modulation. We therefore strongly recommend that
the STL transmitter’s pre-emphasis be defeated (freeing the STL from
such potential overshoot), and that the 464A be used to provide the nec-
essary pre-emphasis.
If the STL transmitter’s pre-emphasis cannot be defeated, configure the
8200ST for flat output. In this case, average modulation levels of the STL
may have to be reduced to accommodate the overshoots.
Quick Setup
Quick Setup guides you through 8600Si setup. It is appropriate for users without
special or esoteric requirements. Following this section, you can find more detailed
information regarding setup beyond the Quick Setup screens. In most cases, you will
not need this extra information.
For the following adjustments, use the appropriately labeled soft button to choose
the parameter you wish to adjust. To change a parameter (like an output level), it is
usually necessary to hold down the soft button while turning the knob. However, if
there is only one parameter on a screen (like choosing 50 or 75µs pre-emphasis), you
can change this with the knob alone. (You do not have to hold down a button.) Let
the text on the screen guide you through the process.
1. Press the front-panel Setup button.
2. Press the Quick Setup soft button when its label appears on the display.
Quick Setup presents a guided sequence of screens into which you must insert in-
formation about your particular requirements. In general, the screens are self-
explanatory.
Use the
Next
and
Prev
buttons to navigate between screens. These buttons will
flash to indicate that they are active.