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[[Category:Block Docs]]
 
[[Category:Block Docs]]
VCO - Voltage controlled oscillator.  Produces a sinusoid of frequency based on the amplitude of the input.  See [[VCO (complex)]] for a complex sinusoidal output.  
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VCO - Voltage controlled oscillator.
  
input: float stream of control voltages;  
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input: float stream of control voltages; output: float oscillator output
 
 
output: float oscillator output
 
  
 
== Parameters ==
 
== Parameters ==
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== Example Flowgraph ==
 
== Example Flowgraph ==
  
This flowgraph can be found at [https://github.com/duggabe/gr-RTTY-basics/tree/master/RTTY_xmt]
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Insert description of flowgraph here, then show a screenshot of the flowgraph and the output if there is an interesting GUI.  Currently we have no standard method of uploading the actual flowgraph to the wiki or git repo, unfortunately.  The plan is to have an example flowgraph showing how the block might be used, for every block, and the flowgraphs will live in the git repo.
  
[[File:RTTY_vco_fg.png]]
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== Source Files ==
 
 
For this flowgraph, the standard RTTY tones of 2295 (mark) and 2125 (space) are generated. The calculations for this follow:
 
 
 
* Choosing a full-scale frequency of 2500Hz with an input of +1, the VCO Sensitivity = (2 * Pi * 2500 / 1) = 15708
 
* The space frequency of 2125 is created by vco_offset = (2125 / 2500) = 0.850 volts
 
* The mark frequency of 2295 is created by a vector of (1 * 0.068) + 0.850 = 0.918 volts
 
  
See [[Sample_Rate_Tutorial#Sink_hardware_example]] for a discussion of the timing involved in a similar flowgraph.
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; C++ fileshttps://wiki.gnuradio.org/index.php/SISO
 
 
== Source Files ==
 
  
; C++ files
 
 
: [https://github.com/gnuradio/gnuradio TODO]
 
: [https://github.com/gnuradio/gnuradio TODO]
  

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