The intermod software is designed for professional audio wireless microphone users, av installers of wireless devices, frequency coordinators, and broadcasters. F intermod calculates rf and optical intermodulation products. Invisible waves rfintermodpro addresses rf intermodulation. For example, frequent occurances of intermod called hits that affect a state police receiver would be considered unacceptable, yet occasional background noise on the radio system used by a towing service might cause less concern.
Fintermod calculates rf and optical intermodulation products. Radio mobile is propagation simulation software free to the amateurradio community. Intermodulation calculator intermodulation study software. Radio mobile rf propagation simulation software on. 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. A independent table is used for input spectrums arriving at the rf port and another one for spectrums arriving at the if port. Up to transmit and receive frequencies can be entered with a frequency range from 0. With the ability to save an intermod study to disk, prfintermod becomes a field service tool that provides the technician a lot of help with the practical trouble. Rf frequency selectivity parameters at frequency deviations f 1 and f 2 from the operating frequency f 0, respectively. Midians intermod calculator is pcbased intermodulation study and intermodulation calculator software that tests for the possible occurrence of intermodulation. Intermod assists computational engine rapidly generates frequency sets of intermodulation distortionfree radio frequencies, applying userdefined signal bandwidths. There are many software applications ranging from commercial software to shareware and even freeware, that can be used to study the intermod phenomenon through mathematical analysis.
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. The bottom line is that we cant see rf without these tools, and we must. Its also highly advised to employ some type of wireless intermod intermodulation analysis software. The intermodulation products are sum and difference as well as other integer and non integer multiple of these frequencies. Unistar consists of an equipment database, a site interference analysis module, and multiple graphical user interfaces. Why you should use frequency coordination software. Fundamentally, it describes the ratio in db between the power of fundamental tones. An im analysis involves applying a model4 to an rf inventory at a cosite5.
It can be installed on any pc using windows 2000 sp4 or higher, windows xp sp3 or higher, windows vista and windows 7. However, tap provides straightforward study creation and visualization options to conduct a wide range of advanced wireless communication analyses, including analyses for project 25 p25 and tetra systems. 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. After the trial period expires, you will be prompted to purchase a license key. Intermodcalculator intermodulation study software intermodulation calculator. Tvstudy mapper the tvstudy mapper program gives you the ability to easily create highquality maps that show the output generated by the fccs tvstudy software. Clearwaves rf scanning and coordination software pc touchstone rf scanning software. 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. Though this much is helpful, the technician gets little other assistance from the program. In the bottom right box is a listing of the most popular wireless mics and devices with the ability to create custom inventories and groups. The most common interference are the 3rd and 5th orders. Case study of interference between public safety long term. Radio mobile rf propagation simulation software online. It considers the transmitted frequencies through the specified level of harmonics, taking into account all possible combinations of the proposed facilities.
Such a study is only as good as its underlying model and its input dataset. 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. Rf intermod calculator i have had a look online and there are a couple of tools that calculate up to three freqs but nothing bigger. Such an im analysis produces a candidate list of potential im interference products and their respective im source frequencies. 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. Unlimited calculated intermodulation frequencies output with order of 2.
With the power of knowledge, its far more likely to be successful regardless of event size. The intermod software is designed for professional audio wireless microphone users. For technical details on what intermodulation distortion is and how to. Ias intermodulation analysis system rf coordination. It is available as a standalone pcbased software product or as a plugin option for the invisible wavestm rf command center. Intermod assists computational engine rapidly generates frequency sets of intermodulation distortionfree radio frequencies, applying userdefined signal bandwidths and channel spacing. Tvstudy mapper professional broadcast engineering software. Technology radio frequency interference rfi intermodulation. Its computational engine rapidly generates frequency sets of intermodulation distortionfree radio frequencies, applying userdefined signal bandwidths and. An intermod interference analysis generates an infinite number of orders. Work product is organized into projects that may contain path studies, coverage studies. Software tools for rf interference analysis, intermod, transmitter noise, receiver desensitization, spurious output.
The intermodulation colocation software then screens the potential intermod interference. This restricted version of f intermod will only calculate the intermod frequencies for up to 3 channels, and will expire after 20 days. The values of 1 and 2 for example can be obtained from the equation to calculate the attenuation of a signal at an offtune frequency. The intermodulation analysis is performed through waterford consultants software which generates the thousands of potential interactions that result from even a modestly congested cell site. The user may enter the lists interactively or use a database built from a previous run. Click here for additional information and photos on the intermod calculator.
Intermodulation radio mobile rf propagation simulation software. With the ability to save an intermod study to disk, prfintermod becomes a field service tool that provides the technician a lot of help with the practical trouble shooting process. 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. Whatever your requirements, from an intermod study performed at waterfords offices based on the data you provide, to an onsite rf interference investigation and resolution project, or some intermediate. Rf intermodulation calculator,formula for rf intermodulation. Following equation or formula is used for rf intermodulation imd calculator. The rf behavioral characteristics analyzed in the detailed interference analysis report are not taken into account in the intermod report. A case study of interference between public safety long term evolution lte and public safety 700 mhz land mobile radio dhswppsc6. Midians intermodcalculator predicts the possible occurrence of intermodulation products that may cause receiver interference. Its computational engine rapidly generates frequency sets of intermodulation distortionfree radio frequencies, applying userdefined signal bandwidths and channel spacing. Ias intermodulation analysis system rf coordination software pc intermod assist rf coordination software pc lectrosonics wireless designer.
Unisites shared site rf engineering software unistar unisite has developed a software tool called unistar to meet the need for effective shared site rf interference analysis and engineering. Following is the list of useful converters and calculators. Intermod is designed to perform detailed intermodulation analysis at a specific site or globally within a stations coverage area. It is becoming increasingly more common for multiple wireless licensees to share communication sites, cellular tower.
Interference and intermodulation studies are necessary to determine the potential of any new or modified signals interfering. The intmod program performs harmonic and intermodulation analysis of 2 andor 3 signals of 3rd, 5th or 7th order mixing. 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. In any study, each frequency should be tagged with a short identifier to make it possible to recognize the user. Up to transmit and receive frequencies can be entered with a frequency range from 0 hz to 999,999. The requirements for the formation of an intermod signal are a nonlinear mixing point and at least two signals of different frequencies applied to the non. The intermodulation colocation software then screens the potential intermod interference threats against preset system intermod interference thresholds. They generate huge imposing looking lists of possible intermod products for a technician to investigate. Intermod assist rf frequency coordination software intermodulation analysis and frequency coordination software 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. Software tool identifies rf spectrum intermodulation. The impact of radio frequency interference depends on what you are doing. Finding, solving and preventing intermodulation problems. Intermodulation interference calculations in the landmobile. Request a proposal today through our online interference study request form, or contact us if you have additional questions or need more information.
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 intermodulation between frequency components will form additional components at frequencies that are not just at harmonic frequencies integer. Introducing the latest, lowcost development in rf intermodulation analysis and frequency coordination intermod assist is a new, groundbreaking software. Intermodulation distortion is created when two or more transmission frequencies mix together and form new additional signals. Intermodulation distortion is an important metric of linearity for a wide range of rf and microwave components. Intermod professional broadcast engineering software. Jan 18, 20 kaltman creations llc has introduced rf intermodpro, software that aids in calculating, predicting and identifying intermodulation interference of wireless devices, under the invisible waves product banner. Rf calculator conversion from and to various rf units intermodulation calculate intermodulation for 2 and 3 frequencys up to the 9th order. This restricted version of fintermod will only calculate the intermod frequencies for up to 3 channels, and will expire after 20 days. Intermod intermod is designed to perform detailed intermodulation analysis at a specific site or globally within a stations coverage area. An intermodulation study can assist in site design and planning when performed in advance of construction, however the study may also be a useful tool when investigating and seeking resolution to rf intermodulation interference problems at an existing colocation site.
Highly configurable maps are displayed in a page style, what you see, is what you get, editor where labels and other information can be conveniently added. Further computer and empirical evaluation of these results identifies predicted colocation intermodulation interference levels, noise floor degradation, and other data sufficient for the. Intermodulation study software intermodulation calculator midians intermodcalculator predicts the possible occurrence of intermodulation products that may cause receiver interference. The office for interoperability and compatibility by the public safety communications research program. Oct 02, 2014 intermodulation software for pro audio. Computer analysis of intermod requires a pragmatic. 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. Understanding intermodulation distortion measurements. Jan 07, 20 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. When 2 or more antennas operating at different frequencies are installed on the same platform i. The combination process can occur in the final stage of a transmitter or in the rf of first mixer circuitry of a receiver. 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. The fcc mandates that antenna owners or licensees must ensure that the rf signal from their sites does not interfere. Softwrights allnew tap 7 software now includes updated intermodulation, omni pattern distortion, and stacked antenna software tools.
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. The opening screen for rfintermod pro displays a box at the bottom left to select zipcode based localized interference frequencies such as tv stations, ntsc channels, dtv channels and other transmitters. Unlimited calculated intermodulation frequencies output with order of 2 and higher. Tap is comprised of individually licensed software modules, which may be purchased in almost any combination depending on user requirements for area coverage studies, path profiles, interference studies, presentation of results, and budget. This can prevent the need for system modification after the system is installed and operating. Online calculators this website offers a collection of online rf tools. 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. The user enters the transmitter and receiver frequencies in mhz with their corresponding bandwidths in khz. Intermod assist is a new, groundbreaking software tool specifically designed for the wireless, professional audio and video industries. Intermodulation interference most often concerns oddorder products.
Channel search, new station allocation studies, coverage prediction, are all projects that comstudy handles with ease. Volunteer counsel program, antenna regulation and zoning, ccr study information. Professional wireless systems is a leader in the wireless audio industry. The intermod product calculator programs that one finds today generally just do bruteforce number crunching. 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. Touchstone pro rf scanning software pc or mac vantage rf scanning software for mac os. This intermodulation calculator intermodulation study software is softwarebased. For example, you could hear strong interference at 14. The intermodulation analysis is performed through proprietary computer programs that generate the thousands of potential interactions that result from even a modestly congested cell site. Kaltman creations llc has introduced rfintermodpro, software that aids in calculating, predicting and identifying intermodulation interference of wireless devices, under the invisible waves product banner. Welcome to intermod assist intermodulation calculator and frequency coordination software. Intermodulation calculator intermod study software. Intermodulation is a source of interference that arises from the combination of two or more.
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