Application Library
Noisecom Application Note # 101
"What is noise? All materials produce noise at a power level proportional to the physical temperature of the material. This application note contains basic noise theory and power calculating formulas, and with additional conversions for dBm, ENR, and dBm/Hz.
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Noisecom Application Note #122
Accurate Es/No for DOCSIS / CATV BER Measurements
"The Data-Over-Cable Service Radio Frequency Interface Specifications (DOCSIS) call out BER performance vs. Es/No as required tests for both the Upstream CMTS (Cable Modem Termination System) and Downstream CM (Cable Modem) receivers. This application note includes block diagrams of a typical test procedure, and the necessary calculations.
Use These Noisecom Products:
Under Analog noise generators, see the UFX series.
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Noisecom Application Note #121
Improving Noise Figure Measurement
"Noisecom's calibrated noise sources are designed to measure noise figure of low noise amplifiers (LNA), and can be used with an HP8970 or similar Noise Figure Meter. This application note explains noise figure (NF) measurement in detail including correction factors.
Use These Noisecom Products:
Under calibrated noise sources, see NC346, and NC5000 series.
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Noisecom Application Note #119
Noise-Injection Radiometers
"The radiometer is a sensitive, accurate, calibrated receiver that is used for remote measurement of temperature. Monitoring these temperatures is important for global weather trends, so accurate calibration of these antennas is necessary. This application note explains this calibration procedure.
Use These Noisecom Products:
Under calibrated noise sources, see NC346, and NC5000 series
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Noisecom Application Note #117
Testing Amplifier Linearity With Noise Power Ratio
"Serious dynamic range problems occur in systems loaded with multi-channel signals. Any non-linearity in the system (e.g., amplifier) causes intermodulation products among the input frequencies. This application note provides an explanation of NPR.
Use This Noisecom Product:
Under analog noise generators see the UFX 7000 series
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Noisecom Application Note #112
Calibrating Spectrum Analyzers With a Noise Source
"A simple way to calibrate a spectrum analyzer is to use a broadband white noise source to monitor the analyzer's frequency response by comparing it to a very flat low power noise floor. This application note explains in detail how to calibrate your spectrum analyzer.
Use These Noisecom Products:
Under calibrated noise sources see the NC346
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Noisecom Application Note #110
Gain Bandwidth Product Tests To Cut Production Costs
Economic solutions for production testing should reduce test time, equipment costs,
documentation, and operator skill requirements Gain-bandwidth product testing using
white noise is a method that can produce all of these results. The application note explains this procedure.
Use These Noisecom Products:
Under diodes see NC100 through NC400, and under noise sources see NC500, NC2000, and NC4700 series.
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Noisecom Application Note #109
Noise Diodes Randomize Quantization Errors in A/D Converters
"An A/D converter's finite resolution produces quantization errors as the analog input is partitioned into 2n discrete ranges during an n-bit conversion. This process creates high-level spurs that interfere with digitization, and the application note explains how to include a noise source for dithering the ADC input.
Use These Noisecom Products:
Under diodes see NC100 through NC400, and under noise sources see NC2000 and NC500
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Noisecom Application Note #106
BIT of Balanced Amplifiers
"Built-in testing (BIT) is required in most communications systems to ensure the reliability and performance of the links. Built-in testing is used to detect faults, identify faulty components, and test standby systems. This application note explains how to use a noise diode for this purpose.
Use This Noisecom Product:
Under diodes see NC100 through 400, and under noise sources see NC500, and NC2000
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Using the 9102 spectrum analyzer to evaluate HD radio signals.
HD radio, or IBOC (in-band on-channel) technology is the development of new digital communication technologies which send high quality digital information over existing analog AM & FM radio signals. The HD radio signal transmits near-CD quality audio signals to special receivers along with digital information, including, song, artist identification, and local news information. This application note describes how to use the 9102 spectrum analyzer to view the HD signal, test for signal quality, and monitor spectral emissions.
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