Microwave frequency measurement is done by slotted line, resonant cavities and transfer oscillator.
Microwave power measurement uses bolometers and microwave power meters.
A self balancing bridge working on the principle of power substitution is commonly used.
Microwave impedance measurement is done by measurement of reflection coefficient and VSWR.
A slotted line and probe is a basic tool for these measurements.' Network analyser enables rapid impedance measurement over a broad frequency range.
List I | List II | ||
---|---|---|---|
A. | DMA controller | 1. | Interface between computer and video display adapter |
B. | CKT controller | 2. | Used to read data directly from disk into directly memory |
C. | Interrupt controller | 3. | Supervises the operation of control signal |
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List I | List II | ||
---|---|---|---|
A. | Horn antenna | 1. | High directivity |
B. | Parabolic antenna | 2. | Very high directivity |
C. | Lens antenna | 3. | Moderate directivity |
Reason (R): A TRIAC is a four layers 3 terminal device and can conduct in both directions.
Reason (R): The turn off time of SCR is about 10 to 300 ms.
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