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2
Connections and Installation
2-1
2.1
Introduction
WARNING
The procedures in this section are in-
tended only for qualified service person-
nel. Do not perform these procedures
unless you are qualified to do so. Failure
to recognize and observe normal safety
precautions could result in personal in-
jury or death.
This section includes information on making connections to
the Model 7038 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 connector
insulators.
• Operate the card in a clean environment. If the card be-
comes contaminated, it should be thoroughly cleaned as
explained in
Section 4
.
2.3
Connections
This paragraph provides the information necessary to con-
nect cables and your external test circuitry to Model 7038.
2.3.1 Simplified schematic
Figure 2-1 shows a simplified schematic diagram of the
Model 7038. The card is arranged into three separate multi-
plexers, each with four channels. Note that channels 1, 5, and
9 are normally closed.
2.3.2 Card configuration
Figure 2-2 shows the general configuration of the Model
7038. Connectors include:
IN 1-12 (channels 1-12):
Each input is equipped with a min-
iature SMB coaxial connector. The center conductor is the
signal path, while the outer shell is connected to signal com-
mon.
OUT A, OUT B, and OUT C:
Each multiplexer output is
equipped with a miniature SMB coaxial connector. The cen-
ter conductor is the signal path, and the shell is connected to
signal common.
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