ERAVANT has developed the STZ series of coaxial and waveguide noise sources to cater to a wide range of test and measurement applications, providing accurate reference signals for measuring internally generated noise levels in various components and systems. It can also be used to generate stimulus signals to test systems such as amplifiers.
ERAVANT’s STZ Series of noise sources provides users with many choices to meet their Test & Measurement needs in the frequency range of 0.1 to 67 GHz. The coax connector interfaced models cover the frequency range as wide as 0.1 to 67 GHz and waveguide interfaced models are for full waveguide band operation up to 220 GHz with Excess Noise Ratios (ENR) in the range of 12 to 20 dB. All models include either a Faraday isolator or an internal attenuator to minimize output impedance variations and achieve a flat ENR over frequency. Typical ENR flatness is ±2 dB over the entire operating bandwidth.
The waveguide banded models are calibrated using a Liquid Nitrogen (LN2) based true cold/hot termination method. All noise sources require a nominal supply voltage of 28 VDC. The models with TTL-level input for on/off control signals and up to 1 kHz modulation rate are supported.
Key Features of STZ Noise Source Series
- Ultra Broadband Operation, 0.1 to 67 GHz
- Full Waveguide Operation
- Precision Calibrated and Flat ENR
- Excellent Return Loss
ERAVANT waveguide noise sources are calibrated in-house using a cold reference termination that is cooled with liquid nitrogen. A room-temperature or “hot” reference termination is also used. The effective noise temperature values of these terminations are regulated and measured to within a fraction of a degree. As a result, noise source calibrations are based on accurate and reliable references. Eravant offers calibration services for waveguide-banded noise sources up to 220 GHz and recommends repeating calibrations annually.
Calibration uncertainties can arise from a number of possible causes such as impedance mismatches, insertion loss in connections, temperature drift, and measurement accuracy. All sources of error are minimized to the extent possible. When their effects are significant, they are measured and included in ENR computations, or they are considered when estimating calibration uncertainty.
These noise sources are ideal for use in Test & Measurement labs. Click here to learn more about ERAVANT's Calibrated Noise Sources.
