Example

SECTION 1 - The Switching Function

1.1 Introduction

Many electronic test systems use relay switching to connect multiple devices to sources and measurement instruments. In some cases, multiple sources and measuring instruments are connected to a single evice. Switching allows automating the testing of multiple devices, thereby reducing error and costs.
Designing the switching for an automated test system demands an understanding of the signals to be  witched and the tests to be performed. Test requirements
can change frequently, so automated test systems  hould provide the flexibility needed to handle a variety of signals. Even simple test systems often have diverse and conflicting switching requirements.
The test definition will determine the system  onfiguration and switching needs. Given the versatility that test systems must offer, designing the switching function may be one of the most complex and  hallenging parts of the overall system design.
A basic understanding of relay types and switching configurations is helpful when choosing an appropriate switch system. Section 1 describes the effects of switching on system performance. Relay types, switching configurations, and switching  ardware options are also discussed.