1 edition of A level density analyzer for shipbaord RFI measurements found in the catalog.
A level density analyzer for shipbaord RFI measurements
Dennis C. Arneson
The design and construction of a Level Density Analyzer for use in the measurement of shipboard RADIO FREQUENCY INTERFERENCE consisted of integrating various analog and digital integrated circuits and related electronic components to enable accurate level analysis of a broad range of analog signals including noise and/or electromagnetic waves which constitute radio frequency interference. The overall design and system goals were to be able to adequately sample an analog signal, classify it, convert the classification to digital data and provide outputs to be logged either by manual or magnetic tape means. The design and construction efforts efficiently and economically achieved these goals.
|Statement||Dennis C. Arneson, John E. Ohlson|
|Contributions||Ohlson, John E., Naval Postgraduate School (U.S.)|
|The Physical Object|
|Pagination||83 p. :|
|Number of Pages||83|
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2-port measurements for active RF-components (amplifiers): 1 dB compression point (power sweep). Beam transfer impedance measurements with the wire (button PU, stripline PU.) Network Analyzer test stand 3 Measurements of the characteristic cavity features (Smith Chart analysis). Cavity perturbation measurements (bead pull). The 75th percentile of the EF measurements was also high ( V/m) on the bridge roof level, and the percentage of measurements above V/m were slightly high (%) at this level. The electric field levels were significantly lower in the upper deck level compared to the bridge deck level.
Shipboard Measurements. A ship's size and capacity can be described in two ways--linear dimensions or tonnages. Each is completely different yet interrelated. Page 19 Thursday, June 2, PM. 20 CHAPTER 2 UNDERSTANDING RFID TECHNOLOGY Readers The RFID reader sends a pulse of radio energy to the tag and listens for the tag’s response. The tag detects this energy and sends back a response that con-.
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LIBRARY TBCilNICAlREPORTSECTION NAVAl TESCHOOL MONTER&RNIA NPSL NAVALPOSTGRADUATESCHOOL Monterey,California ALEVELDENSITYANALYZER FORSHIPBOARDRFIMEASUREMENTS n October FEDDOCS D/2: NPSOL Approvedforpublicrelease:Distributionunlimited.
of the spectrum analyzer must be at least 6 dB greater than the minimum allowed power level for the harmonic, the adjacent channel power level, or the intermodulation product.
The adjacent channel power measurement must be performed with a modulated signal, which means the source’s adjacent channel performance also has to be considered. This rf measurements tutorial covers RF device testing basics using RF covers RF test and RF measurements parameters viz.
power,gain,spurious,harmonics,P1dB,noise figure,image rejection,return loss,phase noise,group delay,frequency stability,TOI,AM-PM conversion and more RF measurements. Liquid level measurement - Basics Part 1 Introduction Level measurement is one of the “Big 4” measurements in industrial plants.
As important as flow, pressure and temperature, the worldwide level market in was estimated at US$ Billion. Approximately 12% of all measurements in the industrial marketplace are used for level.
Over the ocean, the RFI percentage in this product corresponds to the amount of raw measurements discarded due to RFI contamination before SSS retrieval. Therefore, maps of the RFI percentage can give the user an indication of where RFI is more likely to have affected the quality of SSS retrievals, for a particular month, or for a series of months.
Rosemount //Axx2 can be used to measure both level and interface. These products are recommended mostly for tank installations. Chamber installations are possible for level and interface in some cases but are not recommended. Figure 2. Interface Level Measurement //Axx1 Interface level Upper product level Interface level.
Radio Frequency (RF) Field Measurement Instrument Choices: This article describes low-cost RF radio frequency electromagnetic field survey measurement instruments useful for performing electromagnetic field RF field detection and level measurements either by engaging a professional or by consumers using low-cost instruments which measure radio frequency level and direction.
Nuclear level controls are used for continuous measurements, typically where most other technologies are unsuccessful. Radioisotopes used for level measurement emit energy at a fairly constant rate and in a random fashion. Gamma radiation, which is present in high-energy, short-wave lengths produce a.
gies for level measurement are available: Hydrostatic. This continuous indirect method measures the pressure due to liquid level and density plus over-pressure. The sensor measures the difference between this pressure and a reference one, normally atmospheric; so, it’s not well suited for vacuum and pressure service.
Want to learn how LIBS technology works. Download the eBook to discover the science behind laser induced breakdown spectroscopy. Developed by our team of experts, you’ll learn what businesses can benefit from portable LIBS, how the technology works, and what to look for when purchasing a LIBS analyzer- plus much more.
Download eBook. For this reason, one of the most common measurements used in tag characterization is basic power versus frequency analysis.
You can achieve simple measurements of a tag’s power versus frequency with either a vector signal generator/vector signal analyzer combination or with a complete RFID emulation measurement system. Density measurement is used to monitor the quality of products and processes. Density meters do not measure specific gravity directly, but it is inferred and calculated based on other measurements.
Specific gravity or relative density is the sample density compared to a reference substance. RF Signal Analyzer Overview & Basic Settings • Overview of signal analysis –measurements, instrument block diagram • Initial settings to capture a signal –frequency, span, reference level • Improving the quality of your measurement –averaging, RBW, sweep time • How DANL, sensitivity, and phase noise can impact a measurement.
The density of a fluid can be determined using several measuring instruments. Recently the oscillation-type density meters have shown great versatility, being used in various branches of industry. The term "porosity" is often used to encompass the measurements of pore size, volume, distribution, density, and other porosity-related characteristics of a material.
The adsorption and permeability, strength, density, and other factors influenced by a substance’s porosity determine the manner and fashion in which it can be appropriately used. modulation and audio analyzer, power meter and spectrum analyzer in a single instrument.
Due to its high linearity and wide frequency range (20 Hz up to max. 50 GHz, depending on the instrument model), it is ideal for measurement tasks in calibration and test laboratories.
This application note deals with the specific topic of level calibration of. Larry and I developed filters that decreased the RFI from S-9 +40 dB to S-5 as measured on my IC from a short distance.A, B Recently, an employee from the local power utility company said that about half of his RFI complaints were from grow light ballasts.
In my experience, the 40 meter band seems to be where that sort of RFI is the strongest. It gives ERP in dBm, range in feet and power density in mW/cm 2.
Follow the scale A line for an ERP of 60 dBm to the point where it intersects the foot range scale. Read the power density directly from the A-scale x-axis as mW/cm 2 (confirming our earlier calculations).
Figure 2. Power Density vs Range and ERP. Example 2. From such measurements, Micromeritics’ GeoPyc can determine envelope density and bulk density, as well as other data, such as percent porosity. Envelope Density.
Envelope density assessment requires that a critical distinction be made of where surface irregularity or roughness ends, and where internal porosity begins. Measuring density of solid, liquid and viscous samples on an analytical or precision balance - fast and easy process with Density Kit and balance application.
We explain best procedures for density determination: buoyancy and displacement methods, both based on Archimedes' Principle. More». where a1, a2, b1, b2 are traveling waves normalized by the characteristic impedance Z0 of the transmission line defined as 0 1 1 Z E a = i, 0 2 2 Z E a = i, 0 1 1 Z E b = r, 0 2 2 Z E b = that the square of the magnitude of these variables has the dimension of power.
2 a1 can then be thought of as the incident power on port 1. 2 b1 as power reflected from port 1 and so on.4 Level measurement The right measuring principle for every application Level measurement applications in liquids including liquefied gases and bulk solids are divided into four areas: Continuous measurement, point level detection, density and interface measurement.
The overview contains the measuring principles suitable for each area.This is a main beam power density estimation program intended for use as part of a routine evaluation of RF safety compliance with FCC regulations. Amateur Radio operators licensed by the Federal Communications Commission of the United States of America are required to do a "routine evaluation" of the strength of the RF fields around their.