Circuit Description; Overview - Orban OPTIMOD-FM 8500S Operating Manual

6-6
TECHNICAL DATA

Circuit Description

Overview

Environmental
Operating Temperature: 32° to 122° F / 0° to 50° C for all operating voltage ranges.
Humidity: 0–95% RH, non-condensing.
Dimensions (W x H x D): 19" x 1.75" x 14.25" / 48.3 cm x 4.5 cm x 36.2 cm. One rack unit
high.
Humidity: 0–95% RH, non-condensing.
RFI/EMI: Tested according to Cenelec procedures. FCC Part 15 Class A device.
Shipping Weight: 10 lbs / 4.6 kg
Warranty
Two Years, Parts and Service: Subject to the limitations set forth in Orban's Standard
Warranty Agreement.
Because engineering improvements are ongoing, specifications are subject to change with-
out notice.
This section provides a detailed description of user-serviceable circuits used in the
8500S. We do not provide detailed descriptions of the digital circuitry because most
of this is built with surface-mount components that cannot be removed or replaced
with typical tools available in the field. Field repair ordinarily consists of swapping
entire PC boards.
The section starts with an overview of the 8500S system, identifying circuit sections
and describing their purpose. Then each user-repairable section is treated in detail
by first giving an overview of the circuits followed by a component-by-component
description.
The drawing on page 6-27 shows circuit board locations.
•
The Control Circuits control the DSP, display, and input/output sections of the
8500S system.
•
The Input Circuits include the connectors and RF filtering for the analog and digi-
tal audio inputs, as well as the circuitry to interface these inputs to the digital
processing.
•
The Output Circuits include the connectors and RF filtering for the analog and
digital audio outputs, and the circuitry to interface the digital processing to
these outputs.
•
The DSP Circuits implement the bypass, test tone, and audio processing using
digital signal processing.
ORBAN MODEL 8500S