== Running a Network Analysis of the BJT Amplifier ==
At this point, your BJT amplifier circuit is ready for an overall Network Analysis Test. Replace Q1 (the standard BFG193 model) called Q1 with NP1 (RF BJT model of BFG193)BFG193v10v10mA called NP1. Place the "IN" marker right after the source resistor, and place the "OUT" marker at the load resistor. Replace Then remove the AC voltage source with a piece of wire as shown in the opposite figure. remove well as the source and load resistors R2 and run a Network Analysis Test of the true amplifier circuit independent of the source and loadR1. The opposite figure below shows this circuit with the source and load sections removed. :
{{Note|For a two-port Network Analysis Test, you should remove the voltage source, source resistance and load resistance from your circuit.}}
Run a network analysis of this circuit with start and stop frequencies set at 500MHz and 1500MHz and with a linear frequency step size of 10MHz. Plot the S-[[parameters]] on an amplitude-only Cartesian graph. The figure below shows the results for s11, s21, s12 and s22 [[parameters]].
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Run a Network Analysis Test of the true amplifier circuit independent of the source and load with the [[parameters]] specified below:
Run a network analysis of this circuit with start and stop frequencies set at 500MHz and 1500MHz and with a linear frequency step size of 10MHz. Plot the S-[[parameters]] on an amplitude-only Cartesian graph. The figure below shows the results for s11, s21, s12 and s22 [[parameters]].