Articles

The IQmonitor program allows you to customize your receiving installation in the best possible way. To do this, there are tools for accurately measuring the signal level and SNR, the dynamic spectrum of transponders of both polarizations at once in real time, measuring the nonlinearity of the amplitude-frequency characteristic (AFC) of the installation and correcting its unevenness in RF spectra.
And for installation with an antenna on a polar motor suspension, it is possible to take the antenna pattern and determine the actual width of the main lobe of the pattern and the actual gain at different frequencies.
Unfortunately, the motor suspension consumes (especially in the cold season during start-up) a large (up to 0.5 - 0.7A) current, and you have to install it immediately after the drop cable to the receiver (PCI card input). In this case, the motor is connected in series with the LNB both by direct current and by a microwave signal. This leads to the formation of standing waves in the cable and a strong distortion of the overall frequency response of the receiving installation and, as a result, a decrease in its sensitivity.

In order to tune the receiving system to the global maximum sensitivity, you first need to match the angle of exposure of the antenna with its angular opening (sometimes they say "angular aperture", although this is not correct, IMHO), and then precisely align the antenna to the satellite.
If the LNB is not in the geometric focus of the parabolic antenna, then we will adjust the antenna not by the true azimuth and elevation of the satellite, but by choosing the "best" position of the LNB around…

IQmonitor Pro often scares off potential users with an abundance of interface elements that allow you to set dozens of parameters for optimal program operation.

What does optimal mean? - these are parameters that, depending on the task at hand, will provide either the maximum accuracy of determining the parameters of transponders at an acceptable speed of their search, or the maximum speed of constructing spectra of satellite signals with the condition of finding all above-threshold…