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This is the System Screen for the RF Workbench software. It represents a basic
component lineup for a frequency conversion stage. Each of the triangular yellow
icons represents a mini cascade of five components (passive or active), the square
green icons represent a filter, the round blue icon represents a mixer. and the
square red icon represents a local oscillator.
The relative positions of the input amplifier/filter can be swapped (filter first),
as can the output amplifier/filter positions. To edit each component, just click
on the icon and a window will open with all the necessary fields. Every input is
fully tested for validity so that erroneous data cannot be entered.
The white rectangle at the input represents all of the input parameters, and
can be edited by clicking on it. If desired, the output data of a previous stage
(as with a multiple frequency conversion) can be used rather than simply sweeping
the input across a frequency range.
All necessary mixer parameters, including the spur table, is set by clicking
on the mixer icon. Mixer spur table files can be loaded from the editor screen.
The local Oscillator (LO) can be either a fixed or swept frequency, and its power
level set in its editing window.
Once all the parameters are set, then out data is viewed in the graph at the
bottom. All parameters can be individually turned on or off. Graph scale can be
set manually, defined with the mouse, or allowed to auto-scale. Clicking on the
white Midband Output rectangle opens a wind with a tabulated list of output numerical
values.
Return to the main
RF Workbench
webpage.
Note: An error has been reported in the Calculate Spur Level auxiliary window
where the gains of the Gain 1 and Gain 2 components is not included in the spur
product power. You can get the correct answer by manually adding those two gain
values.
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