Table of Contents
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2.1
Introduction
WARNING
The installation and operation proce-
dures in this section are intended for use
only by qualified service personnel. Do
not perform these procedures unless
qualified to do so. Failure to recognize
and observe normal safety precautions
could result in personal injury or death.
This section contains information on matrix card connec-
tions, installation and matrix programming, and is arranged
as follows:
2.2
Handling precautions — Discusses precautions that
should be taken when handling the card to avoid con-
tamination that could degrade performance.
2.3
Environmental considerations — Outlines environ-
mental aspects of using the Model 7174A.
2.4
Card installation and removal — Details installation
in and removal from the Model 707A Switching
Matrix.
2.5
Connections — Discusses card connectors, cables
and adapters, and typical connections to other
instrumentation.
2.6
Matrix configuration — Discusses the switching
matrix, as well as matrix expansion by connecting two
or more cards together.
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Operation
2.7
Measurement considerations — Reviews a number
of considerations when making low-level current and
capacitance measurements.
2.8
Coaxial jumper access — Provides information on
jumper removal.
2.2
Handling precautions
To maintain high impedance isolation, care should be taken
when handling the matrix card to avoid contamination from
such foreign materials as body oils. Such contamination can
substantially lower leakage resistance, degrading perfor-
mance. The areas of the card that are most sensitive to con-
tamination are those associated with Teflon® insulators. To
avoid any possible contamination, always grasp the card by
the handle or the card edges. Do not touch board surfaces,
components, or card edge connectors.
Dirt and other particle build-up over a period of time are
other possible sources of contamination. To avoid this prob-
lem, operate the mainframe and matrix card only in a clean
environment. If contamination is suspected, clean the card as
discussed in Section 4.
2.3
Environmental considerations
For rated performance, the card should be operated within
the temperature and humidity limits given in the specifica-
tions at the front of this manual.
2
2-1
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