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Schwarzbeck SY 9223-17-100 Wideband Isolation Transformer View larger

Schwarzbeck SY 9223-17-100 Wideband Isolation Transformer

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  • Filters for power supply lines are measured according to CISPR 17
  • Two wideband transformers are required to transform the;
  • Typical impedance of measurement devices from 50 Ω to 0.1 Ω or from 50 Ω to 100 Ω respectively
  • 0.1 Ω transformer (voltage division ratio 22:1) has to be connected to the 50 Ω generator
  • 100 Ω transformer (voltage division ratio 1.4:1) has to be connected to a 50 Ω receiver

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Test Equipment Description

Filters for power supply lines are measured according to CISPR 17, annex C (respectively DIN EN 55017, annex C).

Two wideband transformers are required to transform the typical impedance of measurement devices from 50 Ω to 0.1 Ω or from 50 Ω to 100 Ω respectively.

The 0.1 Ω transformer (voltage division ratio 22:1) has to be connected to the 50 Ω generator. The 100 Ω transformer (voltage division ratio 1.4:1) has to be connected to a 50 Ω receiver. The schematic below shows how to set up the measurement.

IMPORTANT! Do NOT connect the transformers to any kind of power supply, neither A.C. nor D.C.

Specifications
ModelSY 9223-17-0.1 SY 9223-17-100
Nominal frequency range1 kHz – 300 kHz1 kHz – 300 kHz
Return lossmin. 15 dBmin. 15 dB
Max. power dissipation500 mW500 mW
Impedance transformation50 Ω : 0.1 Ω100 Ω : 50 Ω
Dimensions incl. connectorsL= 105 mm, H= 43 mm, B= 40 mmL= 105 mm, H= 43 mm, B= 40 mm
Weightmax. 300 gmax. 250 g
Connector 50 Ω side50 Ω BNC Buchse/female50 Ω BNC Buchse/female
Connector 100 Ω side4 mm Buchsen/4 mm female4 mm Buchsen/4 mm connector


Transmission of the two transformers measured in the 50Ω System (back to back)

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