Intermodulation calculator intermod study software. Professional wireless systems is a leader in the wireless audio industry. Introducing the latest, lowcost development in rf intermodulation analysis and frequency coordination intermod assist is a new, groundbreaking software tool specifically designed for the wireless, professional audio industries. Fintermod calculates rf and optical intermodulation products. Midians intermod calculator is pcbased intermodulation study and intermodulation calculator software that tests for the possible occurrence of intermodulation. The output from the intermod software is used to calculate the results of an intermodulation products study by evaluating the included proposed andor existing facilities at the site. The quarterwave impedance transformation calculator is used to match an input and an output impedance at a given frequency for maximum power transfer. Apr 01, 2002 technical feature the use of intermodulation tables for mixer simulations the use of intermodulation table imt files can lead to accurate prediction of the output frequency content of an upconverting or downconverting mixer in system simulations. The intermodulation between frequency components will form additional components at frequencies that are not just at harmonic frequencies integer multiples of either, like harmonic distortion, but. In the same way imd products can be found for more than two frequency inputs. Intermodulation intermodulation products intermodulation software. Mystic somewhat a contraction of microwave system calculator is an easytouse program which provides you with a smart way to build your rfelectronic design faster and easier.
Software tool identifies rf spectrum intermodulation. Download rf intermod calculators best software for windows. Midians intermod calculator is pcbased intermodulation study and intermodulation calculator software that tests for the possible occurrence of intermodulation products that may cause rx interference. Up to transmit and receive frequencies can be entered with a frequency range from 0 hz to 999,999. Intermodulation interference calculations in the landmobile service 19952007 scope this recommendation serves as a basis for the calculation of a maximum of three intermodulation interference that are created at the output of a receiver under influence of intensive unwanted signals at the. Download intermodulation calculator best software for windows. The combination process can occur in the final stage of a transmitter or in the rf of first mixer circuitry of a receiver. Radio mobile is propagation simulation software free to the amateurradio community.
Understanding intermodulation distortion measurements. Intermodulation interference or intermod results when two or more frequency components combine in a way that interferes with another frequency. This license type may impose certain restrictions on functionality or only provide an evaluation period. A general algorithm to calculate third order intermodulation product locations for any number of tones by chris arnott. Click here for additional information and photos on the intermod calculator. The intermodulation colocation software then screens the potential intermod interference threats against. It is available as a standalone pcbased software product or as a plugin option for the invisible wavestm rf command center. The intermod product calculator programs that one finds today generally just do bruteforce number crunching. Intermodulation calculator for rf devices spreadsheet excel spreadsheet that calculates 2t30, 2t50, and 3t30 imds for up to 16 device frequencies. Intermod assist intermodulation calculator and frequency coordination intermod assist is easy to use. Technical feature the use of intermodulation tables for mixer simulations the use of intermodulation table imt files can lead to accurate prediction of the output frequency content of an upconverting or downconverting mixer in system simulations. Following equation or formula is used for rf intermodulation imd calculator. As i only need this about once a year it is not worth buying some of the bells and whistles type software packages that charge a.
Calculate and output intermod products only due to new planned frequencies for an. The license type of the downloaded software is trial. Radio mobile rf propagation simulation software on. This website offers a collection of online rf tools. The software will allow you to consider up to a maximum of four simultaneous components. The software is periodically scanned by our antivirus system. Jun 30, 2016 intermodulation with wireless microphones 3 key points. Intermodulation analysis system ias intermodulation analysis system ias by professional wireless systems is a musthave for every rf engineer. Intermod is an application that uses visual basic with an msexcel frontend. His job functions include educating customers on rf test.
So, i scanned the copy provided to me by the author, chris arnott, when. Intermodcalculator intermodulation study software intermodulation calculator. For best results, custom imt files should be constructed from mixer output spectrum. Excel spreadsheet that calculates 2t30, 2t50, and 3t30 imds for up to 16 device frequencies. Intermodulation im or intermodulation distortion imd is the amplitude modulation of signals containing two or more different frequencies, caused by nonlinearities or time variance in a system. Intermodulation is a source of interference that arises from the combination of two or more signals at different frequencies in some kind of nonlinear system. Intermodulation interference calculations in the landmobile. Ias saves precious setup time by combining a database of wireless performance equipment and access to local television frequencies in use. The fcc mandates that antenna owners or licensees must ensure that the rf signal from their sites does not interfere with any existing signals from other carriers, public safety, etc. Intermod intermod is designed to perform detailed intermodulation analysis at a specific site or globally within a stations coverage area.
Click here for additional information and photos on. Typically each series or individual radio requires its own software package. Intermod assists computational engine rapidly generates frequency sets of intermodulation distortionfree radio frequencies, applying userdefined signal bandwidths and channel spacing. Finding, solving and preventing intermodulation problems. Rf path calculator global rf calculators and converters. Also freqfinder allows you to do intermod on multiple brands wireless, which is something i do frequently.
Commscope helps design, build and manage wired and wireless networks around the world. All products besides the desired 1x1 product are called spurious mixer. Intermodulation with wireless microphones 3 key points. Rf calculator conversion from and to various rf units intermodulation calculate intermodulation for 2 and 3 frequencys up to the 9th order. Intermodulation products result in interference, when two or more signals combine in a nonlinear device and produce an undesired signal on or near the tuned frequency of the victim receiver. Intermodulation calculator intermodulation study software. The use of an intermodulation calculator, such as the gl communications intermod calculator, will easily determine where intermodulation might occur, allowing appropriate action to be taken early in the design stage. The formulaequation for this rf intermodulation calculator is also mentioned.
Upgrade your existing intermod calculator by selecting a software version from the list below. Intermod includes tools to help the audio engineer drill down the massive amount of data, to a smaller set of most. Doing your own intermod calculation allows you much greater flexability than being stuck with only the factory intermod charts. Intermod assist intermodulation calculator and frequency coordination software is a unique tool it will change the way you approach the problem of intermodulation interference and the challenges of frequency coordination and channel assignment. Welcome to intermod assist intermodulation calculator and frequency coordination software. To obtain motorola software see the sticky in the motorola forum. F intermod calculates rf and optical intermodulation products. Oct 12, 2009 to obtain motorola software see the sticky in the motorola forum. It includes features you wont find in any other product including those that cost many times more. The impact of radio frequency interference depends on what you are doing. The use of an intermodulation calculator, such as the gl communications intermod calculator, will easily determine where intermodulation might occur, allowing appropriate action to. They generate huge imposing looking lists of possible intermod products for a technician to investigate. Intermodulation interference calculations in the land. As a very basic example, suppose you have two transmitters at a site, one operating on 150mhz and one on 155mhz all of these examples are for illustration only.
Intermod professional broadcast engineering software. Online calculators this website offers a collection of online rf tools. Midians intermodcalculator predicts the possible occurrence of intermodulation products that may cause receiver interference. I have had a look online and there are a couple of tools that calculate up to three freqs but nothing bigger. Intermod assist intermodulation calculator and frequency coordination software. The use of intermodulation tables for mixer simulations. Passive intermodulation pim, voltage standing wave ratio vswr, effective isotropic radiated power eirp, noise figure and third order intercept point ip3. Intermodulation calculator intermodulation calculator excel intermod calculator excel rf intermod calculators. Though this much is helpful, the technician gets little other assistance from the program.
The pcbased product refines and simplifies the process of identifying intermodulation distortion imd frequencies in a given rf spectrum and is available as a standalone pcbased software product or as a plugin option for the invisible waves rf command center. Its computational engine rapidly generates frequency sets of intermodulation distortionfree radio frequencies, applying userdefined signal bandwidths and. Intermodulation calculator for rf devices spreadsheet. The calculator calculates imd intermodulation products based on two fundamental frequencies. Rf intermodulation calculator,formula for rf intermodulation. Radio mobile rf propagation simulation software online. F intermod purchasing information to purchase f intermod license. Fintermod purchasing information telecom engineering inc. The download is provided as is, with no modifications or changes made on our side. Unlimited calculated intermodulation frequencies output with order of 2 and higher. Intermod assist intermodulation calculator and frequency.
As i only need this about once a year it is not worth buying some of the bells and whistles type software packages that charge a yearly licence fee. Fintermod download fintermod calculates rf and optical. An online application for calculating the intermodulation distortion products imd3 arising from third order nonlinearities thirdorder intercept point, ip3 in rf receivers under twotone input. Calculate intermodulation for 2 and 3 frequencys up to the 9th order. Intermod assist rf frequency coordination software. I have been using your program for over two years battling im in the crazy world of vhf. Aaronia iwximp1 rfintermodpro interference calculation. Following is the list of useful converters and calculators. Intermodulation with wireless microphones dbb audio.
Midian electronics intermod calculator software downloads. Fintermod purchasing information to purchase fintermod license. The intermod product calculator programs that one finds today generally just do. Other online calculators there are more calculators on the world wide web than the ones on this website. Reviewing our products and software is a good place to begin and will give you a better idea of the kinds of wireless diagnostic tools we develop and support. Intermodulation im is a source of interference from the interaction between two or more signals at different frequencies when they are combined in a nonlinear system. This download is usable only by those customers who have purchased and registered their intermod calculators. The opening screen for the rfintermod pro displays a box at the bottom left to select zip code based localized interference frequencies such as tv stations, ntsc channels, dtv channels and other transmitters. Unlimited calculated intermodulation frequencies output with order of 2. Interference due to intermodulation generally occurs when at least two transmitters close to the receiving antenna produce very strong signals in the receiver. Calculate intermodulation products from 2 and 3 frequencies. Rf intermodulation freeware downloads shareware central.
A microwave or rf mixer will produce not only the desirable 1 rf x 1 lo frequency product, it will also produce every arithmetically possible frequency component. Rf intermod calculators free download suggestions software advice. It can be a tremendous job to calculate the intermodulation products from several frequencies, below is a calculator that calculates the intermodulation product from two and three frequencies. The intermod software is designed for professional audio wireless microphone users, av installers of wireless devices, frequency coordinators, and broadcasters. The various other vendors often permit their dealers to sell the software online i. These studies predict intermodulation interference and provide.
Macros are also available to copy intermodulation frequencies for import into frequency coordination software. The need for coordination is because the wireless mics, ears and guitar transmitters mostly operate in the uhf tv bands which are currently channel 14 to 51 in the usa and 21 to 59 in europe. Sifm is the sennheiser software for rapid calculation of intermodulationfree radio frequencies for wireless microphone systems. Intermod assist is a new, groundbreaking software tool specifically designed for the wireless, professional audio and video industries. As a leader in communications infrastructure, we have built a. The intermod software is designed for professional audio wireless microphone users. Interference and intermodulation studies are necessary to determine the potential of any new or modified signals interfering with existing signals, so owners can plan and.
The standard intermodulation study allows the user to enter any number of transmitters to be considered at a given location. Intermod assists computational engine rapidly generates frequency sets of intermodulation distortionfree radio frequencies, applying userdefined signal bandwidths. Basically, 3im is produced by the mixing of the 2nd harmonic or overtone of one tx signal with the fundamental 1st. Radio mobile is propagation simulation software free to the amateurradio community radio mobile rf propagation simulation software welcome. For example, you could hear strong interference at 14. Intermodulation is also referred to as intermodulation distortion, im, imd, intermod and intermod distortion. As a leader in communications infrastructure, we have built a future network that is always online. Addressed to rf engineers or cell site designers, it provides system calculations for.