Orban OPTIMOD-FM 8700, Руководство по эксплуатации

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OPTIMOD-FM DIGITAL TECHNICAL DATA
6-7
Display:
5.7” / 14.4 cm (diagonal) quarter-VGA color display.
Operating Temperature: 32

to 122

F / 0

to 50

C for all operating voltage ranges.
Humidity: 0
–95% RH, non-condensing.
RFI / EMI: Tested according to Cenelec procedures.
Shipping Weight: 40 lbs. / 18.1 kg
Warranty
Five Years, Parts and Service:
Subject to the limitations set forth in Orban’s Standard
Warranty Agreement (page 1-30).
Because engineering improvements are ongoing, specifications are subject to change with-
out notice.
Circuit Description
This section provides a detailed description of user-serviceable circuits used in the
8700i. 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 8700i 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 6-37 shows circuit board locations.
Overview
The Control Circuits control the DSP, display, and input/output sections of the 8700i
system.
The Input Circuits include the connectors and RF filtering for the analog and digital
audio inputs, as well as the circuitry to interface these inputs to the digital pro-
cessing.
The Output Circuits include the connectors and RF filtering for the analog and digi-
tal audio outputs and the circuitry to interface the digital processing to these out-
puts.
The DSP Circuits implement the bypass, test tone, and audio processing using digital
signal processing.
The Power Supply provides power for all 8700i circuit sections.
A block diagram of the DSP signal processing appears on page 6-88.