Model 1900
Impedance Matching Transformer

Model 1900 Impedance Matching Transformer

General
The model 1900 low-noise impedance matching transformer is a versatile device for matching sources with impedances in the range from less than 50 mW to greater than 500 W to measuring instruments with high input impedance and offers two turns ratios of 1:100 or 1:1000. The frequency response depends on both the turns ratio and the source impedance, but under optimum conditions will be essentially flat from below 0.1 Hz to above 2 kHz.

The unit is supplied with a special low-noise coaxial cable fitted with two BNC plugs to connect its output to the following instrument.

Frequency Response (typical)

Model 1900 Frequency Response
Noise Figure Contours (typical)

Model 1900 Noise Figure Contours

Voltage Gain	1:100 or 1:1000 selected by front-panel BNC connector
Frequency Response	Depends on turns ratio and source resistance - see plots above
Mounting	Free-standing fully shielded metal case
Dimensions (excluding connectors)	3" wide x 5.8" long x 3" high (76 mm wide x 147 mm long x 76 mm high)
Shipping Weight	5lbs (2.3 kg)

SIGNAL RECOVERY is part of Advanced Measurement Technology, Inc, a division of AMETEK, Inc.
It includes the businesses formerly trading as EG&G Instruments (Signal Recovery),
EG&G Signal Recovery and PerkinElmer Instruments (Signal Recovery)

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