Orban 8300J, Operating Manual

Page: 31 / 280

OPTIMOD-FM DIGITAL INTRODUCTION
1-7
Digital AES3 Left/Right Input/Output
The digital input and output conform to the professional AES3 standard. They both
have sample rate converters to allow operation at 32, 44.1, 48, 88.2, and 96 kHz
sample frequency.
The left/right digital input is on one XLR-type female connector on the rear panel;
the left/right digital output is on one XLR-type male connector on the rear panel.
OPTIMOD-FM provides digital and analog inputs and outputs. You select whether
OPTIMOD-FM uses the digital or analog input either locally or by remote interface.
If OPTIMOD-FM is set to accept a digital input and the feed fails, OPTIMOD-FM will
automatically switch back to the analog input.
Level control of the AES3 input is accomplished via software control through System
Setup (see step 5 on page 2-26) or through PC Remote.
Both analog and digital outputs are active continuously.
The 8300’s output sample rate can be locked either to the 8300’s internal crystal
clock or to the sample rate present at its AES3 input.
The 8300 can apply J.17 de-emphasis to signals applied to its digital input and J.17
pre-emphasis to the processed signal emitted from its digital output. J.17 is a 6
dB/octave shelving pre-emphasis / de-emphasis standard with break points at 400 Hz
and 4 kHz. It is mainly used in older studio / transmitter links that use NICAM tech-
nology. The 8300’s provisions for J.17 make it fully compatible with systems using
this standard.
Analog Left/Right Input/Output
The left and right analog inputs are on XLR-type female connectors on the rear
panel. Input impedance is greater than 10k

; 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 50

; balanced and floating. The outputs can drive 600

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 2-24 and step 7 on page 2-27) or through
PC Remote.
Stereo Analog Baseband Composite Output
The stereo encoder has two unbalanced analog baseband outputs on two BNC con-
nectors on the rear panel. Each output can be strapped for

or 7

source imped-