ELVA-1 Precision Calibrated Noise Sources

ELVA-1’s calibrated noise source ISSN-XX series delivers a uniform level of noise power spectral density within the whole waveguide frequency range. Sources are available in eight waveguide bands covering 26.4-170 GHz. A Silicon IMPATT diode is employed as a fundamental building block of the source. High stability of the device allows it to be used for test and instrumentation applications in place of gas-tube noise sources. Low DC power requirements eliminate the need for complex high voltage supplies. There are two operation modes: CW mode and pulsed AM mode with modulation frequency up to 1 kHz. Typical value of excess noise ratio (ENR) as a function of frequency is given on the plot below.

Model Number	ISSN-28	ISSN-22	ISSN-19	ISSN-15	ISSN-12	ISSN-10	ISSN-08	ISSN-06
Frequency Band	Ka	Q	U	V	E	W	F	D
Range, GHz	26.5-40	33-50	40-60	50-75	60-90	75-110	90-140	110-170
Input waveguide	WR28	WR22	WR19	WR15	WR12	WR10	WR8	WR6
Wavequide Flange	UG599/U	UG383/U	UG383/U-M	UG385/U	UG-387/U	UG387/U-M	UG387/U-M	UG387/U-M
Bandwidth, GHz	Full	Full	Full	Full	Full	Full	Full	Full
ENR, dB (nom)	15	14	13	13	13	12	12	12
ENR Flatness, dB	±1.0	±1.5	±1.5	±1.5	±1.5	±1.5	±2.0	±2.5
Stability, dB/°C	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01
Stability/Day, dB	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05
Biasing Voltage, V	+18…+28
Sizes, mm*	50/75	50/75	50/75	50/75	50/60	50/60	50/60	50/60
* Cylinder diameter/length (without isolator)

Precision_Calibrated_CW_Noise_Sources

Product categories: Noise Sources

ELVA-1 Precision Calibrated Noise Sources

At a glance: Key parameters