Tektronix CT-2 Manual de usuario descargar pdf (Pagina 8)

CT-1/CT-2 Current Transformer

Description

The CT-1 (1 GHz) and CT-2 (200 MHz) are current probes designed for either

permanent or temporary installation in the device-under-test (DUT). These

probes are particularly useful for measuring high-frequency currents in solid state

circuitry with minimum circuit loading. Due to bidirectional compatibility, the

CT-1 and CT-2 can be used to inject a signal or as an interstage transformer.

The probes inductively measure current through a conductor and develop a

voltage proportional to the current. For each mA of input current, they output

5 mv (1 mv for CT-2) of signal when properly terminated. Since the CT-1 and

the CT-2 are dynamic current probes (non-DC), the presence of DC current

affects their performance. Figures 2 and 3 show the influence of DC current on

frequency response.

Frequency (Hz)

100%

90%

80%

70%

1 G10 M100 k 100 M1 M10 k

0.5 A

0 A

1 A

This response was obtained with the + side of the CT-1 facing

the signal source (preferred connection above 800 MHz)

Figure 2: CT-1 frequency response vs. DC current

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 19 20

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Tektronix CT-2 Manual de usuario Pagina 8