问题：
What is a common usage of Keithley cards in a cellular telephone production test environment?
答案：
- 7011 - Audio switching
- 7013 - Power switching
- 7016 - RF switching
- 7020 - Digital monitoring and control
Other cards that are commonly used in telecommunications applications include:
- 7022 - Combines 5x6 matrix and digital I/O on one card
- 7035 - Four-wire switching for T1/E1 applications
- 7037 - Combines 30 independent one pole switches and digital I/O on one card
- 7038 - 75 Ohm characteristic impedance for cable and internet applications
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常见问题 ID 70486
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