Connections And Installation; Introduction; Handling Precautions; Connections - Keithley 7017 Instruction Manual

2.1

Introduction

WARNING
The procedures in this section are intend-
ed for qualified service personnel only. Do
not perform these procedures unless you
are qualified to do so. Failure to recognize
and observe normal safety precautions
could result in personal injury or death.
This section includes information on making connections to
the Model 7017 and installing the card in the Model 7001/
7002 Switch System.
2.2

Handling precautions

To maintain high-impedance isolation between channels,
care should be taken when handling the card to avoid con-
tamination from such foreign materials as body oils. Such
contamination can reduce isolation resistance. To avoid pos-
sible contamination, always grasp the card by the side edges
or covers. Do not touch board surfaces, components, or con-
nector insulators.
Dirt build-up over a period of time is another possible source
of contamination. To avoid this problem, operate the card in
a clean environment. If the card becomes contaminated, it
should be thoroughly cleaned as explained in paragraph 4.2.

Connections and Installation

2.3

Connections

The following paragraphs provide information for connect-
ing external test circuitry to the Model 7017.
2.3.1 Simplified schematic
Figure 2-1 shows a simplified schematic diagram of the
Model 7017. The card is arranged into two separate multi-
plexers, each with four channels.
2.3.2 Card configuration
Figure 2-2 shows the general configuration of the Model
7017. Connectors include:
• IN 1-8 (channels 1-8): Each input is equipped with an
SMA coaxial connector. The center conductor is the
signal path, while the outer shell is connected to signal
common.
• OUT A and OUT B: Each multiplexer is equipped with
an SMA coaxial connector. The center conductor is the
signal path, and the shell is connected to signal com-
mon. Banks A and B common are isolated.
2
2-1