NET Framework 4. Ribbon menu tool bar enhances the user experience for touchscreens and provides easier workflow from start to finish. Enhanced calculation features with the ability to lock frequencies from changing. Better international support allowing users to block out restricted bands in their country. Intermodulation Analysis System Features: Database of pre-built models include channel assignments such as group and channel information , eliminating the need to carry frequency charts for a various models of wireless systems.
Specific details also include channel assignments such as group and channel information, eliminating the need to carry frequency charts for a various models of wireless systems. Zone support for coordinations over large venues such as convention centers and hotels. Effectively unlimited number of frequencies supported in each coordination Professional Edition.
Limits are imposed solely by compatible frequencies, not storage or computational ability of the software. Improved graphical view of Frequencies, TV stations and IMD products which allows the user to find open holes and make educated decisions about the best use of the available spectrum. Frequently Asked Questions. Each intermod will have a unique amplitude many of these intermods may be below the thermal noise floor.
The bandwidth of third order products is greater than the individual bandwidth of the sources that created them. For example, if two tone, each of 1 Hz bandwidth, were used to create intermods, the resulting bandwidth would be 3 Hz.
The bandwidth follows the intermod equation that determines the frequency except for the fact that bandwidth cannot be subtracted. The user needs to make sure that the 'Channel Measurement Bandwidth' is set wide enough to integrate all of this energy. The definition of the IP2 for mixers and amplifiers may be different.
The definition difference is 6 dB. The relationship between these two methods is as shown in the following equation:. IP2 h - Is the second-order intercept due to harmonics IP2 i - Is the second-order intercept due to intermods. Standard Amplifier IP2 Definition Amplifier two tone output spectrum is shown in the following graph.
Two tones are generally used to characterize the non-linear response of an amplifier. The difference between the second-order intermod products and second harmonics is 6 dB. Mixer IP2 Definition In many cases, second-order products are generally out of band. However, mixer input spurious products exist at sub harmonics of the IF and can be converted directly to the IF through harmonics. Second harmonics are dominant since they have larger amplitudes than third harmonics. Frequently, the mixer is terminated with a bandpass filter and the second harmonic level is measured by moving the RF input frequency slightly so its second harmonic will fall at the desired IF frequency.
Even though the IP2 equations appear to be similar between the amplifiers and mixers the delta is actually different. In the amplifier case the reference point is intermod amplitude whereas for a mixer it is a harmonic. The difference between these two references is 6 dB. Generally, IP2 of an amplifier is defined at its output. However, IP2 of a mixer is generally defined at its input.
Cascaded intermod equations are NOT used by Spectrasys. There are serious drawbacks using these cascaded equations. Using basic assumptions the intercept point for a cascade can be determined. Cascaded equations come in two flavors, coherent and non-coherent. If the intermods throughout the cascade are assumed to be in phase then coherent addition should be used.
This will yield a worst case intercept point. However, if the intermods are assumed to be out of phase then non-coherent addition can be used. The calculation of cascaded intermods is generally in a spreadsheet. Note there is no relationship between these calculations and the physical measurements of the intercept points in the lab. There is no mention of frequencies and power levels of tones that are need to make measurements in the lab. Because of these serious restrictions new intermod measurements were created to eliminate these issues.
See ' Intermod Path Measurement Basics ' for additional information. Intercept measurements in the lab are broken down into two groups, in-band and out-of-band. In-band measurements are used when tones are not attenuated by filtering through the cascade.
For example, intercept point for a power amplifier is generally done with 2 tones that exhibit the same power throughout the system. Out-of-band measurements are used when they are attenuated like filtering in an Intermediate Frequency IF. For in-band measurements two tones, f1 and f2 are created by two signal generators and combined before entering the Device Under Test DUT. Care needs to be taken in the setup to ensure reverse intermods will not be generated in the signal generators before appearing at the DUT input.
A typical setup is as shown below using two tones. The intercept point is determined from the measured power level of the two tones and the power level of the intermods themselves on a spectrum analyzer as shown in the following figure. Out-of-band measurements are more complicated since the tones have been attenuated at the IF output. This is illustrated in the following two figures. Without knowing what the un-attenuated tone power level is the intercept point cannot be determined as shown in the following diagram.
To solve this problem a virtual tone can be determined which, is the power of the tone at the DUT input plus the in-channel cascaded gain. Once the virtual tone power and the in-channel gain are determined then both input and output intercept points can be found. In the lab measuring the in-channel cascaded gain and intermod power is a two step process.
First, the in-channel gain is measured using a single signal generator as shown below. Next, the in-channel signal generator is disabled and the two tone generators are enabled and the in-channel intermod power is measured as shown below. Be aware that it is very difficult in practice to measure intermod power levels near the noise floor of the receiver. At this point we know that the power level of the intermod is equivalent to the power level of the on-channel signal generator.
The process of measuring the intercept point is very different than using cascaded equations. When determining the intercept point in the lab the user must physically create both tones at the frequencies of interest. The spacing between the tones needs to be such that the third order intermods will appear at the desired locations.
The power level of the input tones needs to be sufficiently low to keep the DUT in linear operation but large enough to be seen in the dynamic range of the spectrum analyzer. When measuring the intermod and tone power levels the user must select the appropriate frequencies on the spectrum analyzer to place the markers. Out-of-band intermod measurements require an additional step to measure the in-channel cascaded gain.
Even if you attempt to engage in this activity in PM's we will still enforce the forum rules. Your PM's are not private and the administration has the right to read them if there's a hint to criminal activity. If you are having trouble legally obtaining software please state so.
We do not want any hurt feelings when your vague post is mistaken for a free request. It is YOUR responsibility to properly word your request. To obtain Motorola software see the Sticky in the Motorola forum. The various other vendors often permit their dealers to sell the software online i. Please use Google or some other search engine to find a dealer that sells the software. Typically each series or individual radio requires its own software package. One package is for conventional programming and the other for trunked programming.
The conventional package is more reasonable though is still several hundred dollars. The benefit is you do not need multiple versions for each radio unlike Motorola.
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