This is final part of this lab. The main part is to the combination of 3 virtual instrument mentioned above which will be used to measure the frequency output response of low-pass output filter circuit. The frequency cut off the circuit is 2 kHz which can calculate from the formula 1/2*w*0.01u*8k. After we finished construction all of the instrument. The virtual power supply will function as voltage source supply op-amp which has two channel 12 and -12 volt. The virtual multi-meter will function as function that will used to will use to generated signal input for low-pass filter. The formula function block contain formula 10^ (a+i*(b-a/N-1)) which will calculate the data every loop that has been run and sent to index array ready for next state. The data from index array and virtual function generator will be point of X-axis. The last one is a virtual digital-millimeter is used to read and sent data to expression node which contains (20 log10 (x)) and would calculate the point of Y-axis. After, we have all X and Y axis input data, the data will sent to convert to dynamic data in order to send to build XY graph. Moreover, the result of the graph that come X and Y is shown cut off at 2 kHz which is corrected from what we had calculated.