Editing VCO

[[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. 

input: float stream of control voltages; output: float oscillator output

== Parameters ==
; Sample Rate
: sampling rate (Hz)

; Sensitivity
: units are radians/sec/volt

; Amplitude
: output amplitude

== Example Flowgraph ==

This flowgraph can be found at [https://github.com/duggabe/gr-RTTY-basics/tree/master/RTTY_xmt]

[[File:RTTY_vco_fg.png]]

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.

== Source Files ==

; C++ files
: [https://github.com/gnuradio/gnuradio TODO]

; Header files
: [https://github.com/gnuradio/gnuradio TODO]

; Public header files
: [https://github.com/gnuradio/gnuradio TODO]

; Block definition
: [https://github.com/gnuradio/gnuradio TODO]