Editing Simulation example: FSK

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== Testing ==
 
== Testing ==
  
How do we know that it's the original bit stream? To verify that, we'll compare it to the input bit stream, which we can do because this is a simulation and we have access to the transmitted data (Stream ID: "xmt_data"). Comparing these two directly shows us that the received signal is some number of bits behind because the transmitter and receiver chain has many blocks and filters which delay the signal. To compensate, we have to delay the transmitted bits by the same amount using the [[Delay|Delay]] block. Then you can adjust the delay to find the correct value and see how the bits synchronize. Also you can subtract one signal from the other to see when they are synchronized because the output will be 0. Note that it takes a few seconds for the delay to adjust before it can be seen in the output. The correct delay is 202.
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How do we know that it's the original bit stream? To verify that, we'll compare it to the input bit stream, which we can do because this is a simulation and we have access to the transmitted data (Stream ID: "xmt_data"). Comparing these two directly would show us nothing meaningful. Why? Because the transmitter and receiver chain has many blocks and filters that delay the signal, so that the received signal is some number of bits behind. To compensate, we have to delay the transmitted bits by the same amount using the [[Delay|Delay]] block. Then you can adjust the delay to find the correct value and see how the bits synchronize. Also you can subtract one signal from the other to see when they are synchronized because the output will be 0. Note that it takes a few seconds for the delay to adjust before it can be seen in the output. The correct delay is 202.
  
 
[[File:FSK_example_out.png|800px]]
 
[[File:FSK_example_out.png|800px]]

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