Analog Left/Right Input/Output; Stereo Analog Baseband Composite Output - Orban OPTIMOD-FM 8500S Operating Manual

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INTRODUCTION

Analog Left/Right Input/Output

Stereo Analog Baseband Composite Output

Level control of the AES3 input is accomplished via software control through System
Setup (see step 5 on page 2-28) or through PC Remote.
Both analog and digital outputs are active continuously.
The 8500S's output sample rate and 19 kHz pilot tone frequency can be locked to
the 8500S's internal crystal clock, to the sample rate present at its AES3 input, or to a
compatible reference signal (10 MHz, 1 x wordclock, AES3id, or AES11id) applied to
the appropriate sync input.
The 8500S can apply J.17 de-emphasis to signals received at its digital input and J.17
pre-emphasis to the processed signal emitted from its digital output.
The left and right analog inputs are on XLR-type female connectors on the rear
panel. Input impedance is greater than 10kΩ; balanced and floating. Inputs can ac-
commodate up to +27 dBu (0 dBu = 0.775Vrms).
The left and right analog outputs are on XLR-type male connectors on the rear
panel. Output impedance is 50Ω; balanced and floating. The outputs can drive 600Ω
or higher impedances, balanced or unbalanced. The peak output level is adjustable
from –6 dBu to +24 dBu.
Level control of the analog inputs and outputs is accomplished via software control
through System Setup (see step 3 on page 2-26 and step 10 on page 2-30) or
through PC Remote.
The stereo encoder has two unbalanced analog baseband outputs on two BNC con-
nectors on the rear panel. Each output can be strapped for 0 or 75Ω source imped-
ance and can drive up to 16dBu (±13.82V peak) into 75Ω in parallel with up to
0.047μF (100ft/30m of RG-59/U cable) before any significant audible performance
degradation occurs.
See the footnote on page 1-16 and refer to Figure 2-3 on page 2-9.
Independent level control of each output is available via software (see step 6 on
page 2-28.
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J.17 is a 6 dB/octave shelving pre-emphasis/de-emphasis standard with break points
at 400 Hz and 4 kHz. It is used mainly in older studio/transmitter links that use
NICAM technology. The 8500S's provisions for J.17 make it fully compatible with sys-
tems using this standard.
ORBAN MODEL 8500S
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