The last two terms generate. Higher order PIM products like IM7 can have a wide. Its computational engine rapidly generates frequency sets of intermodulation distortion-free radio frequencies, applying user-defined signal bandwidths and. With these tools you can calculate your link budget and determine if any additional components are needed along your RF signal chain. This is especially true at the lower- (450 MHz to 1GHz) and mid. The intercept point is based on a best-fit regression line plotted through the known x-values and known y-values. Three sequences describe the frequency sum products. LO 2 x Input -4 : -118 dBc. However, when subject to the high RF powers found in cellular systems, these devices can generate intermodulation signals at –80 dBm or higher. Use the INTERCEPT function when you want to determine the value of the dependent variable when the independent. m, n are positive integers including 1, m+n is the order of intermodulation. exe file inside the installer are Digitally Certified and Signed in order to. Conclusion. The standard format for indicating decibel values is to use upper case letters; i. Since headend levels can be carefully optimized and premium amplifiers used, intermodulation distortion within the headend is minimized, and most distortion occurs in the supertrunk, coaxial distribution, and set-top terminal. The a1Ain,int is the input amplitude of our blocker interferer, and as it is in the output, it is multiplied by gain a 1. SIFM is the software for rapid calculation of intermodulation. Weld Cost Calc XL. Our Savings Calculator is a free spreadsheet that is simple to use and much more powerful than most online calculators that you'll find. Use the amplitude level as a guide instead of absolute spec. The calculator helps to find 2nd and 3rd-order IMD products because. 99999 THz and for optical 0 to 999,999. It lets you analyze a fixed or variable rate home mortgage. This is crucial for your business. 06746. 0 MHz that combine in a rectifying circuit, such as an oxidized fence. This page provides figures that may be used in the link budget calculator. With Wavetool you can quickly find microphones with problems, low battery or no signal. The formula/equation for this RF Intermodulation calculator is also mentioned. We would like to show you a description here but the site won’t allow us. 1, -10 dBm RF input produces -17 dBm IF output (Point 1 on the graph), so that conversion loss is 7 dB. Crossmodulation is a third order distortion. Then your percent change formula takes this form: = (C2-B2)/B2. 2 - Antenna Placement Calculator (New) 3 - Third Order Intercept Calculator. =SUM (D1:D7,F1:F7)Welcome to the ninth installment of All About Wireless. ) that exhibits a nonlinear response. The most prominent during a two tone test would be the intermodulation products at 2f1-f2, 2f2-f1 and third harmonics at 3f1 and 3f2. Software and online calculators:. Midian's INTERMOD CALCULATOR predicts the possible occurrence of intermodulation products that may cause receiver interference at the radio repeater site. Select the template and click "Create" to use it. This software tool specifically designed for the wireless, professional audio and video industries. detailed view. Click the “Generate Report” button to generate a report that shows theIn addition to my favorite wireless tools, Here are of my favorite and most helpful wireless/RF resources I mentioned recently in the Live Sound Summit Webinar hosted by Nathan Lively of Sound Design Live. Interpolating between Two Values by Joining SLOPE and INTERCEPT Functions. Macros are also available to copy intermodulation frequencies for import into frequency coordination software. Moreover, this view allows you to edit the frequency by moving them with the mouse. 99999 THz and for optical 0 to 999,999. Loose connections are another source. 107. To estimate the density at 53 degrees Celsius, use XLOOKUP to find the values x1=40, y1=1. 11 = 5. Defining PIM. . See chapter 4. The meaning of INTERMODULATION is the production in an electrical device of currents having frequencies equal to the sums and differences of frequencies supplied. The result is 6. For example, you could hear strong interference at 14. Calculates the point at which a line will intersect the y-axis by using existing x-values and y-values. In a gem of a paper, Hemmi explored the intermodulation product calculation problem ori-ented around the classic non-linear amplifier studies of Ha [5], but only considered the effects of a third order system [1]. Instead of using a calculator, use Microsoft Excel to do the math! You can enter simple formulas to add, divide, multiply, and subtract two or more numeric values. Satellite uplink, downlink and intermodulation interference. For the ideal case, we carry out the normalization in an integer space rather than a voltage space. are integers representing the order of the intermodulation products, typically 2 or 3. PV, one of the financial functions, calculates the present value of a loan or an investment, based on a constant interest rate. Up to 1000 transmit and 1000 receive frequencies can be entered with a frequency range from 0 Hz to 999,999. tiff, . Calculate the Fourier transform of the voltage/current to get a power spectrum. Web. Higher order PIM products like IM7 can have a wide. You can also use our new online calculator, but if you want to see. 4 in. This spreadsheet is one of the only ARM calculators that allows you to also include additional payments. 06746. 5. 00 #,##0 #,##0. PIM stands for Passive Intermodulation. SIFM is the Sennheiser Software for rapid calculation of intermodulation-free radio frequencies for wireless microphone systems. The current version V2323 which can be downloaded below, is an intermediate pre-release of V2400 which is under development at present and has some limited functionalities. Q: How can I export a report from a TAP Intermod study to a spreadsheet format, such as Microsoft Excel? A: After running the intermod study, you. The free space path loss is the loss in signal strength of a signal as it travells through free space. It is also called as RF IMD calculator. C3 - loan term in years. The program is written in Microsoft Excel 97. More after the form. The two signals form intermodulation products at non. This radio horizon vs. Once calculations have been completed the map will indicate areas of possible intermodulation interference in red. Often measurement is not practical and the result must be estimated. 0. Spur Calculator Spectrum Analyzer How To Use Spur Calculator. 2 intermodulation product calculation could result in a “negative” frequency. . INTERMODULATION PRODUCTS. gif or . Interference due to intermodulation generally occurs when at least two transmitters close to the receiving antenna produce. In the Distortion section, select Label Harmonics. Net (Intermodulation Analysis . Seventh Order. It include antenna gain calculator, Antenna G/T ratio calculator, coaxial cable Impedance calculator, Noise temperature to Noise Figure Converter, Radar Range Calculator, resonant frequency calculator, wavelength to. We would like to show you a description here but the site won’t allow us. In addition it will generate IMD (Intermodulation distortion) products at other unwanted frequencies (+/-n*f1+/-m. 02. You can keep the confidential employee register where you can record employee information like name, address, date of joining, annual salary, federal allowances, pre-tax withholdings, post-tax deductions, etc. Download the latest version from Software Informer. detailed view. Uplink EIRP dBW. Learn more about fft, digital signal processing, signal processing. The most prominent during a two tone test would be the intermodulation products at 2f1-f2, 2f2-f1 and third harmonics at 3f1 and 3f2. RFcoordinationNYCMaksud intermodulation dalam kamus Corsica dengan contoh kegunaan. It can also exist for other audio components like speakers and CD or Blu-ray/DVD players, and it can be one of the most difficult music-related distortions to mitigate in. The frequencies of the PIM products will be calculated and displayed. -Added capability to export all grid analysis to single excel file (devices, FDC, details, intermod) 10/03/2020 – 2. dxf, . 55 – 8. Chart Options. in 2 +a 3. This software tool specifically designed for the wireless, professional audio and video industries. Occasionally, Excel will leave invisible characters in blank cell fields that can cause F-Intermod run-time errors. The result is 6. Since 2002, the original Calculator Workbook has been available as a free download. F-Intermod . The following Microsoft Excel formula performs linear interpolation by calculating the interpolation step value:. PIM (Passive Inter Modulation). In other words, the nonlinear range system gives out additional output signals. As a spectrum analyzer also includes non-linear devices like the input mixer or a pre-amplifier, it generates its own intermodulation products, which might have a similar amplitude as the IM products generated by the DUT. Crossmodulation is a third order distortion. 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. This component also allows for editing of devices of the document (adding, deleting). Two signals mix together (amplitude modulation) to produce sum. F-Intermod calculates RF and optical intermodulation products. Output overflow bug fixed for outputs greater than 32767 rows. This software tool specifically designed for the wireless, professional audio and video industries. 651. 0. Examples include connection between connector and cable, junction between two different types of cable made of. Page 2 of 6 . base stations. The free space path loss formula. Easily create a debt reduction schedule based on the popular debt snowball strategy, or experiment with your own custom strategy. Net 4. For example, you could hear strong interference at 14. In particular, the cubic term a3S3 i generates the jammer desensitization term S3 i = S 3 1 cos 3 ω 1t+s32 cos3 ω2t+3S2 1s2 cos 2 ω 1tcosω2t+ 3s2 1S2 cos 2 ω 2tcosω1t The first two terms generate cubic and third harmonic. F-Intermod calculates RF and optical intermodulation products. It includes features you won't find in any other product -- including those that cost many. To calculate EVM, we must represent this normalization in terms of voltage. 5 and addresses the determination of the nonlinear metrics of a cascaded system such the receiver shown in Figure 7. ONVIF Device Manager. Third-Order Intermodulation Theory Intermodulation is a source of interference that arises from the combination of two or more signals at different frequencies in some kind of non-linear system. PIM stands for Passive Intermodulation. For interpolation, we have a below formula. IMD is measured by examining the output of a D evice U nder T est (DUT) with a spectrum analyser while the DUT is being stimulated with a two-tone-rf test signal. Two of the more popular programs are IAS (Intermodulation Analysis Software) made by Professional Wireless Systems and WWB (Wireless Workbench) created by Shure. NET Framework 4. in 3 ’’. SIFM is the Sennheiser Software for rapid calculation of intermodulation-free radio frequencies for wireless microphone systems. The results are presented in a Spectrum format which is easy to understand. 5 - VSWR Calculator. Automatic Except for Data Tables: also tells Excel to recalculate any formulas if the data in the formula's cells changes. Difference between CDMA and GSM specifications. 2 Intermodulation 1. Since the dominating intermodulation products are the third order products, the following equations focus only on those. This annuity calculator was not designed to analyze an Insurance Annuity. 4. When amplifier operates in non linear region or when it is over driven it generates intermodulation products of input signals fed at the input. Identify Your Wireless System Parameters: Begin by gathering the necessary information about your wireless system. Here is the formula you can use: =SUMPRODUCT (B2:B4,C2:C4)/SUM (B2:B4) Dividing the. Passive Inter-modulation (PIM) is the generation of interfering signals caused by non-linearities that occur in passive components such as antennas, cables, connectors, or duplexers with two or more high-power input signals. 1) with the two tone input signal from Eq. 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. This general RF calculator provides path loss, VSWR and wavelength as well as conversions between many common measurements used in the wireless industry. Tools, utilities and links to help you working with wireless devices. Passive Intermodulation (PIM) occurs when two or more signals are present in a passive device (cable, connector, isolator, switch, etc. Picture 1. Enter the Height above average terrain RequiredHow to Automatically Calculate Percentage in Excel. It is also called as RF IMD calculator. The program is written in Microsoft Excel 97. Use Excel as your calculator. GHz. Input. Midian’s INTERMOD-CALCULATOR predicts the possible occurrence of intermodulation products that may cause receiver interference at the radio repeater site. This component also allows for editing of devices of the document (adding, deleting). The intermodulation products are also intermittent. e. 0 MHz if there are two strong signals at 86. Rent vs. 2. Data Types: logicalUsing an intermodulation calculator is relatively straightforward. Complementing his or her expertise and helping to narrow the field of possibilities. As a very basic example, suppose you have two transmitters at a site, one operating on 150MHz and. Lumped Element Balun Design. Select Column, Select All and Delete. Intermodulation Distortion is an amplifier or pre-amplifier specification that quantifies the non-harmonic frequencies added to an input signal. Following equation or formula is used for RF Harmonics Calculator. Features. Here’s how that looks: I created a discount rate named range so that it’s easy to reference the percentage and to change it. 7th, and even higher order intermodulation products. Macros are also. 0 MHz that combine in a rectifying circuit, such as an oxidized fence. 3. Select Order. ITU-R SM. Software. Enter LO Tuning Range, IF frequency/bandwidth and injection side. 99999 nm. Whatever your requirements, from an intermod study performed at LBA’s offices based on the data you provide, to an onsite RF interference investigation and resolution project, or some intermediate activity, call on us. Markers have been added, and the output-referred third-order intercept point has been calculated based on simple geometry and the assumption that the intermodulation products will rise three times as fast as the desired IF tones, for each dBTo apply the custom time format, click Ctrl + 1 to open the Format Cells dialog, select Custom from the Category list and type the time codes in the Type box. Manual: turns off auto-calculations in Excel so you'll have to calculate manually. The most advanced and flexible one is my Home Mortgage Calculator. This is the calculated monthly payment for a 30-year mortgage with an interest rate of. 2nd-order products lie far in frequency to the two input tones and are therefore not very likely to fall. Right now, we have Excel spreadsheets for: Synthesizing lumped-element Chebyshev. Article 05/05/2022; 3 contributors Applies to: Microsoft Office Excel 2007, Excel 2010, Excel 2013, Excel 2016; Feedback. The intermodulation between each frequency component will form additional signals at frequencies that are not just at harmonic frequencies of either, but also at the sum and difference frequencies of the original frequencies and at. To copy columns of data from an Excel spread sheet, highlight the column of frequencies to be copied in Excel and select copy. Intermodulation calculator excel social advice. This PIM calculator checks for any 3rd, 5th and/or 7th order products within a specified tolerance for up to 12 discrete transmitting and receiving frequencies. Third-Order Intermodulation TheoryThis calculator and article specifically addresses the distortion generated from 3 tones, which is the basis for determining the impact of a multicarrier OFDM signal. Pasternack's RF Free Space Path Loss (FSPL) Calculators is the ideal measurement tool that allows loss or attenuation of signal strength calculations between two antennas. · 10+ Home Depot Raised Gardens. We believe that a strong basic financial education is the key to living within your means, avoiding bad debt, and becoming financially. Addressed to RF engineers or Cell Site designers, it provides system calculations for: Passive InterModulation (PIM), Voltage Standing Wave Ratio (VSWR), Effective. On the Home tab, click . Download Intermod - Calculate possible inter-modulation products within wireless microphone systems. Step 1: Enter your Current Balance as of Month 1. Intermodulation is a source of interference that arises from the combination of two or more signals at different frequencies in some kind of non-linear system. Cascaded 2-Tone, 2nd-Order Intercept Point (IP2) When two or more tones are present in a nonlinear device, intermodulation products are created as a result. * For Excel 2003: The CUMIPMT function. Description. Unlimited calculated intermodulation. The handling of trafic through a base station is in general handled by. Net. This can be calculated with calculators (excel), but it is often done by the manufacturer by means of preset frequencies. Third Order. Sennheiser Wireless Systems Manager. 00\ ;\($#,##0. -Introduction of Passive Intermodulation calculator and safe freq assigner (upto 11 frequencies)-Adding Grid Detail View – double-click row header for detailed view. Refer RF Harmonic Distortion Measurement>>. These calculator templates can help you with your mortgage, loans, budgeting, and more. Search. 00 MHz. (Consider the "1" as a substitute for 100%. Passive Intermodulation Calculator for RF antennas. The first major new release of RF Cafe's spreadsheet (Excel) based engineering and science calculator is now available: Espresso Engineering Workbook™. Calculate a list of mixer spurious responses for a set frequency plan. [1] Since both input and output P 1dB and IP3 are reflected about the gain (“linear response”) curve, we can expect them to be directly related by the system gain, as we will see in a subsequent section. Third order distortions are the result of third order non-linearity and are formed by two mixing operations such as (A)+ (A)+ (A) or 3A, (A)+ (A)+ (B), 2A+B, A+B+C. 4. Note also that the spacing between odd-order intermodulation products is always the distance between the two fundamental tones, i. The monthly interest rate is calculated via a formula, but the rate can also be input manually if. Our Savings Calculator is a free spreadsheet that is simple to use and much more powerful than most online calculators that you'll find. With the ever growing amount of wireless gear used for live events. Some loan calculations can be very simple, and the purpose of the simple loan calculator spreadsheet below is to demonstrate this with Excel. co. Buy Investment Spreadsheet (Excel) Bonus: Investment Property Excel Model. This section builds on the distortion analysis of two-port networks in Section 4. PRFIntermod (PRFIntermod. This tutorial will use basic math and graphics to explain how IP3 is generated and how its values are linked to essential quantities, such as the input and output powers of a device. If I understand sockets correctly the connection should be active until you explicitly shut them down. PIM (Passive Inter Modulation). This can be calculated with calculators (excel), but it is often done by the manufacturer by means of preset frequencies. The “Near Hit Window” feature of the InterMod Calculator allows you to check for this type of problem by selecting how many ± KHz. The definition of the third-order intermodulation given in equation 9 is the same as for tones used to describe intermodulation distortion in narrowband analysis. This makes it simple for you to reach a particular place. Using the above results, we get the relation between the OIP3 and IM3 for unequal two-tones IM3low = (3 4C3v2lowvhi)2. It is also the one more cumbersome to calculate. Sinonim intermodulation dan terjemahan intermodulation ke dalam 25 bahasa. Download popular programs, drivers and latest updates easily. Since the test input signal is lower by B dB they will then add this value to calculate ENOB as if the distortion would not increase for a larger input. It's in its infancy as a project but it saved my ass this week which is why I'm so uncharacteristically giddy about it. SK hynix's new DDR5 DRAM module. Hold the "Shift" button and then click the last number in that column to select all of the numbers in between. The goal in designing a signal chain with a power amplifier is to minimize distortion on the output due to harmonic generation and intermodulation products. 6. 2. Mixer Spurious Product Calculator. IP2 (2nd order intercept point) measurement test setup has been described used for IP2 calculator purpose. - Enter an annual inflation rate to automatically increase the amount withdrawn each period. These radio frequency calculators help with unit conversion, attenuator. The third-order intermodulation products are at the frequencies (2⍵1 ∓ ⍵2) and (⍵1 ∓ 2⍵2). Two frequency intermodulation products. Export button in header: Export the filtered results of the table to an Excel document;. A convenient way to introduce the IP3 concept is to describe how intermodulation products vary relative to desired output signal level. Type =(2500-2342)/2342, and then press RETURN . Using intermodulation calculation software will always give you an advantage on any wireless project. The filters and interstage matching networks eliminate harmonics from the system but, unfortunately, allow in-band and close-in out-of-band. The IIP3 calculator does IIP3 calculation using IIP3 formula based on gain and OIP3 values. Accept All. Interpolating Between Two Values by Applying Mathematical Formula. Antennas, Unit-Conversions, VSWR, RF power, DSP, EMC and much more RF related topics. The benefit is you do not need multiple versions for each radio (unlike Motorola). Solving for OIP3 gives OIP3 = 4C31 3ZLC3. Spreadsheet is designed specifically for maintaining cost effective welding. 00 $#,##0 ;($#,##0) $#,##0 ;[Red]($#,##0) $#,##0. The formula/equation for this RF mixer calculator is also mentioned. The third-order intermodulation (IM3) power is -69 dBm, and the 52-dB differenceFor a given frequency, knowing the third order intercept point allows calculation of the approximate level of the third-order IMD products as a function of output signal level. g. Size: 2. Cascading IP3 Values in a Chain of Components. Intermodulation Calculator for RF Devices Spreadsheet Excel Spreadsheet that calculates 2T30, 2T50, and 3T30 IMD’s for up to 16 device frequencies. A link budget calculator. In this issue, we will focus on the generation and impact of intermodulation products. This program calculates mixer intermodulation products upto 5th order and displays graph in amplitude vs. The second class of interactions is less problematic and is also relatively easy to predict. 0 and 100. The spectrum at the output of the non-linear device will not only consist of the original signals but will also contain the sum and difference of the input signals along with their harmonics. Intermodulation products are noise sources, and they lower the SNR. Our Payroll Template will help you to calculate and maintain the records of pay and deductions for each of your employees. The calculator calculates IMD (Intermodulation) products based on two fundamental frequencies. OIP3 calculation is performed using fundamental (f1, f2) and third order intermodulation product powers. RF Harmonic Measurement setup. The component "Frequencies Plan" display the details of all devices continuously (like an Excel spreadsheet) and allow changes to the display (text size, color, etc. 00 ;($#,##0. The third-order intermodulation products are at the frequencies (2⍵1 ∓ ⍵2) and (⍵1 ∓ 2⍵2). 5. The table starts with an initial principal of P 0 =4000. Intermodulation Math. IpsonWebsite for more project information. 0 MHz that combine in a rectifying circuit, such as an oxidized fence. Here are a few uses for this calculator This page covers RF Intermodulation calculator. The expression normally used for the mixing products is: FIF = M * FRF + N * FLO (1) Where M and N are equal to 0, ±1, ±2, etc. As a result, the spectrum produces extra signals and its original signal within its harmonics. The system we utilize as an example, shown in Figure 2, is an RF. Basis - use basis 1 that tells Excel to divide the actual number of days per month by the actual number of days per year. It does this by testing for odd and/or even order products caused by the mixing of multiple transmitters at a given site in a non-linear device. 6. The initial withdrawal will be adjusted for inflation based on the number of years until your retirement. Wireless Converters and Calculators. It then can check for any 3rd, 5th. 99999 THz and for optical 0 to 999,999. M. . Even though this equation is quite simple, its ramifications in RF design are significant. This tells Excel that you are entering a formula, not just numbers. The Measurements tab appears when you select Spectrum in the Analyzer tab. X 8 ft. Managing debt is a normal part of the modern financial journey. frequency. The first and last sum products are unique where the first product location is given by equation 10, Eq. STEP 2: From the drop-down menu, select More Commands from the list. 00 >0 >0 800. Suppose you have the last month prices in column B and this month prices in column C. IP3 is a well-known parameter that gauges linearity in radio frequency (RF) functions and components. Select Column, Select All and Delete. More detail in. The ' Maximum Order ' parameter on the. RF System Calculator This is a excel spreadsheet that analyzes cascaded stages in Receivers and Transmitters. For example, to add up 5 and 7, you type =5+7. Intermodulation Distortion (IMD) occurs when two or more signals are used in a non-linear system. The Receive First High IF, on rare occasions, may be susceptible to strong signals and thus contribute to the potential of Intermodulation. Select Order. Select “AVERAGE” from the “Select a function:” list in the Insert Function dialog and click OK. Apply to Security Engineer, Communications Engineer, Network Engineer and more!Microphone Systems Selection and Operation of WIRELESS 6 light. A. Whenever two signals are mixed together in a nonlinear circuit, a number of products are created according to the mF1 ± nF2 rule, where m and n are either integers. As an example, if you're trying to apply a discount, you would like to reduce a particular amount by 10%. Here's how: Type the equal symbol (=) in a cell. Note there are that contain extensive and detailed information about HDSpectrum and intermodulation studies. MT-012. Its computational engine rapidly generates frequency sets of intermodulation distortion-free radio frequencies, applying user-defined signal bandwidths and. 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. Hi Mark, I am really happy I found you with your way of explaining things – you saved my day, or perhaps my month. 1 Principle for the measurement of intermodulation distortion The imperfect linearity of amplitude-modulated radio transmitters can be expressed as a function of the level of the intermodulation products. Intermodulation calculation User Guide Régis Banville November 2022 . You can now add extra payments into the Payment schedule to see how making occasional extra. . Select the first entry in your Payment (Number) column. 0 MHz if there are two strong signals at 86. The CAGR is also called a "smoothed" rate of return because it measures the growth of an investment as if it had grown at a steady rate on an annually compounded basis. Download now. Calculating the cascaded values for 3rd-order intercept point (IP3) for the system budget requires use of ratios for gain and power levels for IP3 (do not use dB and dBm. Microstrip Calculator. jpeg, . If you do the math, you'll figure out that these customizable calculator templates will save you lots of time, pencils and paper, and head scratching. Begin by choosing a spreadsheet software program such as Google Sheets, Microsoft Excel, LibreOffice Calc, or Open Office Calc. Third order distortion causes multiple unwanted products. It calculates power at the receiver and path loss. The formula/equation for this RF Intermodulation calculator is also mentioned. Use our debt snowball calculator to help you eliminate your credit card, auto, student loan, and other debts. Thank you. Operating Frequency Interactions: Intermodulation A single wireless microphone system can theoretically be used on any open operating frequency. Established 2016 ,Rahsoft is a California based startup concentrating on RF and Antenna Consulting as well as RF Education. Use the IMT Mixer to perform frequency translation defined in an intermodulation table (see [1], [2], [3], and [4]) for a single tone carrier mixed with a local oscillator (LO) signal. The products do not all have the same amplitude, for example the 2A product in 6 dB lower than the A+B product. The first major new release of RF Cafe's spreadsheet (Excel) based engineering and science calculator is now available: Espresso Engineering Workbook™. 65. Press the Enter key to complete your calculation. With this tool, the output frequencies of an RF mixer are calculated using the Henderson [see the Watkins Johnson application note written by Henderson available after the installation of WinRFCalc] model for spurious calculations. exe file inside the installer are Digitally Certified and Signed in order to. Intermod Assist is an intermodulation analysis and frequency coordination application.