Transient Limiter for Protecting Spectrum Analyzer
- ▸ LIT-930A transient limiter, 9 kHz–30 MHz — protects a spectrum analyzer or EMI receiver input from high-level transients during EMC conducted emissions testing, with extended low-frequency coverage down to 9 kHz.
- ▸ Broader frequency range than the LIT-153A — operation extends down to 9 kHz, covering the full 9 kHz–30 MHz conducted emissions band for low-frequency disturbance voltage measurements.
- ▸ Higher 4 W CW (+36 dBm) maximum input rating — withstands stronger transients and long-duration inrush events than the LIT-153A, adding margin for demanding EUTs.
- ▸ Shields the receiver from LISN-generated transients — clamps power-up surges, line disturbances, and switching spikes from the Line Impedance Stabilization Network before they reach the analyzer front end.
- ▸ Installs inline from LISN to receiver and replaces a separate 10 dB pad — the built-in 10 dB in-band attenuation simplifies the setup and delivers consistent input levels across operators and shifts.
- ▸ Built-in band-pass filtering cuts overload risk — integrated low-pass and high-pass filters reject out-of-band signals and mains-related energy, improving analyzer linearity and the detection of genuine emissions.
- ▸ Well-suited to motors, UPS systems, and large power supplies — ideal where low-frequency conducted noise and strong start-up transients are common.
- ▸ Preserves a clean 50 Ω measurement chain with rugged N-type connectors — enhances instrument longevity and test throughput in both R&D and production, backed by a three-year warranty.
LIT-930A Features
- ▸ Transient limiter for conducted emissions testing with a LISN
- ▸ Frequency range 9 kHz to 30 MHz — extended low-frequency coverage
- ▸ Protects spectrum analyzer / EMI receiver input from transient voltage spikes
- ▸ 10 dB in-band attenuation (+1.5 / −0.5 dB) — replaces a separate external 10 dB pad
- ▸ Maximum input level 4 W CW (+36 dBm) — higher rating than the LIT-153A
- ▸ Acts as a band-pass filter — attenuates out-of-band signals and mains-related energy
- ▸ 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 VSWR — clean 50 Ω measurement path
- ▸ 50 Ω N-type connectors — rugged, daily-use construction
- ▸ Three-year warranty
LIT-930A Specifications
| Parameter | Specification |
|---|---|
| Model | LIT-930A |
| Type | Transient limiter (spectrum analyzer input protection) |
| Application | Conducted emissions (disturbance voltage) testing with a LISN |
| Frequency Range | 9 kHz to 30 MHz |
| Insertion Loss (in-band) | 10 dB (+1.5 / −0.5 dB) |
| Maximum Input Level | 4 W CW (+36 dBm) |
| Input/Output VSWR | Excellent (low VSWR) |
| Connectors | 50 Ω N-type |
| Internal Circuit | Low-pass filter, high-pass filter, transient suppressors, two 5 dB matching pads |
| Warranty | 3 years |
Vs. LIT-153A: The LIT-930A extends coverage down to 9 kHz and accepts a higher 4 W CW (+36 dBm) maximum input level, making it suited to low-frequency conducted noise and strong start-up transients from motors, UPS systems, and large power supplies.
| Title | Link |
|---|---|
| LIT-930A Datasheet | View PDF |
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