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                                  Precision Calibrated CW Solid State Noise Sources

                                  Precision Calibrated CW Solid State Noise Sources

                                  發布時間:2023-10-24 9:38:34 加入購物車

                                  Precision Calibrated Noise Sources

                                  Features  
                                   
                                  • ENR 12…15 dB typical
                                  • High stability
                                  • Good flatness
                                  • No high voltage supply required
                                  • Compact solid state source
                                  • High reliability, rugged construction
                                  Applications
                                  • Measurement and test equipment
                                  • Mm-wave noise source
                                  • Calibration
                                  • Noise figure measurement
                                  • Сompatible with noise figure meters for all brand names
                                  Description  
                                       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.
                                     
                                  Block Diagram of Noise Source  
                                  Inputs and Controls:  

                                  Notes:

                                  • Power/ Triggering Inversion Switch can be used for manual ON/OFF. “INV” position is ON.
                                  • Microwave power can be switched with TTL-level control voltage.
                                  • If Triggering Inversion Switch is in OFF (Down) position active level is high, otherwise (INV position) – active level is low.
                                  • Each source supplied calibrated relative to liquid nitrogen cooled load. 

                                  Specifications

                                  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
                                  and 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 UG383/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 ±1.5 ±1.5 ±1.5 ±1.5 ±1.5 ±1.5 ±2
                                  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)

                                  Notes:

                                  • Maximum operating temperature is +60°C
                                  • Diode operating current is 50…100 mA.
                                  • A limiting value of modulation frequency is 1 kHz (external triggering).
                                  • Triggering signal amplitude is TTL level.
                                  • Bias voltage is +18 V It is possible to supply the noise source with +28VDC biasing for the compatibility with commonly used noise meters.
                                  • External triggering connector is SMA female
                                  • ENR would be increased for narrower bandwidth. Please contact factory. 
                                  • For higher frequency models please contact factory.

                                  Power supply for input power 220VAC/50Hz, 110VAC/60Hz or 100VAC/50Hz are available optionally.

                                  For the precision control and fast modulation of the output power of the source Voltage Controlled Attenuator VCVA-XX series can be supplied optionally

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