Transient Limiters For Conductive Emissions Testing

Two Models

Protect your spectrum analyzer input during conducted emissions testing with a Com-Power transient limiter.

The following products can be used during EMC conducted emissions testing to protect the input of a spectrum analyzer. Combined in both the LIT-153A and LIT-930A Transient Limiters are a low-pass filter, high pass filter, transient suppressors and two separate 5 dB impedance matching attenuation pads; one at the input and one at the output.

Follow the links on this page for more information about either of our spectrum analyzer transient limiters. You also can contact us for pricing and other information.

transient limiter LIT-153


The LIT-153A spectrum analyzer transient limiter works over the frequency range of 150 kHz to 30 MHz. It provides excellent protection against high level transients coming from the Line Impedance Stabilization Network (LISN); which, if powerful enough, could potentially damage an unprotected spectrum analyzer input. The LIT-153A has maximum input level ratings of 2 watts CW (+33 dBm), ±10 Volts DC, and a VSWR of < 1:1.2

Use the LIT-153A EMI for conducted emissions measurements with an LISN. The unit features N-type input and output connectors. When connected in series with the coaxial line connecting the LISN to the Spectrum Analyzer, the LIT-153A transient limiter protects the spectrum analyzer by blocking potentially harmful, short duration, high level transients from the RF port of the LISN.

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LIT-930A spectrum analyzer transient limiter


The LIT-930A features a broader frequency range than the LIT-153A, in that the low end of the its operation extends down to 9 kHz. The unit also features higher maximum input level ratings, as it can withstand input levels up to 4 watts CW (+36 dBm), ±15 Volts DC. Its VSWR is less than 1:1.2

Other than these differences, you connect and use the LIT-930A spectrum analyzer transient limiter in the same manner as the LIT-153A.

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Transient limiters play an important role in EMC emissions testing. The LIT-153A and LIT-930A work seamlessly with other Com-Power equipment. Let our team put together a complete package for all of your testing needs.