Introduction
This section contains information about overall switch configuration and connections and is
organized as follows:
•
Handling precautions
•
Configuration
•
Connections
WARNING
The procedures in this section are intended only for qualified service per-
sonnel. 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.
Handling precautions
To maintain high-impedance isolation, care should be taken when handling the switch to
avoid contamination from such foreign materials as body oils. Such contamination can reduce
isolation resistance. To avoid possible contamination:
•
Always grasp the switch by the case
•
Do not touch connector insulators
•
Operate the card in a clean environment. If the card becomes contaminated, it should be
thoroughly cleaned as explained in Section 4.
Configuration
Layout
Figure 2-1 shows the general layout of the Model 7999-4 which features:
Connectors:
•
Power receptacle: 3-pin phoenix jack for supplied power module
•
RS-232 port: DB-9 connector
•
Common, NC, and NO: 3-SMA (female) connectors
Indicators:
•
Power LED
•
NC LED (normally closed relay)
•
NO LED (normally open relay)
Содержание 7999-4
Страница 1: ...Contains Operating and Servicing Information Model 7999 4 Microwave Switch Instruction Manual...
Страница 12: ...1 GeneralInformation...
Страница 16: ...2 Connections...
Страница 22: ...3 Operation...
Страница 25: ...3 4 Operation 1 1 Figure 3 2 Jumper location...
Страница 29: ...4 ServiceInformation...
Страница 34: ...5 ReplaceableParts...
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Страница 41: ...Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A...