Transient LimiterLIT-153A
- ▸ LIT-153A transient limiter, 150 kHz–30 MHz — protects a spectrum analyzer or EMI receiver input from high-level transients during EMC conducted emissions (disturbance voltage) testing.
- ▸ Shields the receiver front end from LISN-generated transients — high-energy switching spikes and start-up surges from the Line Impedance Stabilization Network (LISN) can damage an unprotected analyzer input; the LIT-153A absorbs them inline.
- ▸ Installs between the LISN and the instrument as a drop-in protection stage — the limiter connects directly in the measurement path to clamp EUT start-up transients and switching spikes before they reach the receiver.
- ▸ Replaces the external 10 dB pad and simplifies the test setup — the built-in 10 dB in-band attenuation removes the need for a separate attenuator, improving day-to-day repeatability across operators.
- ▸ Built-in band-pass filtering reduces overload and intermodulation — integrated low-pass and high-pass filters reject out-of-band energy and 50/60 Hz line feed-through, improving analyzer linearity and the detection of real emissions.
- ▸ Maintains a stable 50 Ω measurement path with N-type connectors — excellent input/output VSWR (< 1:1.2) keeps measurement uncertainty low for compliance-grade conducted emissions testing.
- ▸ Ideal for pre-compliance benches and compliance chambers — well suited to troubleshooting noisy power converters, SMPS harmonics, and other EUTs that generate strong conducted disturbances.
- ▸ Prevents costly instrument damage and downtime with a three-year warranty — protects valuable spectrum analyzers in high-throughput production and frequent test cycles.
LIT-153A Features
- ▸ Transient limiter for conducted emissions (disturbance voltage) testing
- ▸ Frequency range 150 kHz to 30 MHz
- ▸ Protects spectrum analyzer / EMI receiver input from transient voltage spikes
- ▸ 10 dB in-band attenuation — replaces a separate external 10 dB pad
- ▸ Acts as a band-pass filter — attenuates out-of-band signals and 50/60 Hz line feed-through
- ▸ Integrated low-pass and high-pass filters plus transient suppressors
- ▸ Two 5 dB impedance-matching attenuation pads — one at the input, one at the output
- ▸ Excellent input/output VSWR < 1:1.2
- ▸ 50 Ω N-type connectors — stable, low-uncertainty measurement path
- ▸ Installs inline between the LISN and the instrument
- ▸ Three-year warranty
LIT-153A Specifications
| Parameter | Specification |
|---|---|
| Model | LIT-153A |
| Type | Transient limiter (spectrum analyzer input protection) |
| Application | Conducted emissions (disturbance voltage) testing with a LISN |
| Frequency Range | 150 kHz to 30 MHz |
| Insertion Loss (in-band) | 10 dB |
| Maximum Input Level | 2 W CW (+33 dBm) |
| Input/Output VSWR | < 1:1.2 |
| Connectors | 50 Ω N-type |
| Internal Circuit | Low-pass filter, high-pass filter, transient suppressors, two 5 dB matching pads |
| Warranty | 3 years |
Purpose: Prevents high-level transients from the LISN from damaging an unprotected analyzer input during conducted emissions testing, while the built-in high-pass filter reduces 50/60 Hz line feed-through.
| Title | Link |
|---|---|
| LIT-153A Datasheet | View PDF |
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