VCO

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 [1]

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 * math.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

TODO

Header files

TODO

Public header files

TODO

Block definition

TODO