| Name | Description | 
| cxsink | 
Function has a single complex input buffer, and auto-fanout outputbuffers. The parameter is the number of complex samples to skip ( swallow)
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| cxskip | 
Function has a single complex input buffer, and auto-fanout output buffers. The parameter is the number of complex samples to skip ( swallow)
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| cxsum | 
This star is an extension of "cxadd".  It creates a Weighted Sum of all input channels and sends it to the output buffer(s).
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| datagen | 
This function generates a random sequence of bits, which can be used to exercise a data transmission system.
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| dco2 | 
This star produces samples of the outputs every 1/fs seconds.  The dco behaves just	like an FM modulator.  The phase is updated	as theta=theta+lambda (integrates the input)
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| dco | 
This star produces samples of the outputs every 1/fs seconds.  The dco behaves just	like an FM modulator.  The phase is updated	as theta=theta+lambda (integrates the input)
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| decbin | 
This star converts the input stream into a binary stream of "1"s and "0". If the input is >0 a "1" is output.
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| decimate | 
Decimation filter for weights in Delta Sigma Modulation
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| dec_qpsk | 
This star inputs constellation points and decods them into a bit stream. It is assumed that the constellation was produced by qpsk.s.
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| delay | 
Function delays its input samples by any number of samples
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| demux | 
This star provides periodic demultiplexing of an input data stream.
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| dffil | 
Star implements direct form IIR digital filter.
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| dff | 
D flip-flop positive edge triggered
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| divby2 | 
This star produces a square wave at half the frequency of the incomming wave	
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| divider2 | 
Divides input asynchronously by specified parameter
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| divider | 
Divides input asynchronously by specified parameter
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| ds2 | 
This star is a self-contained second order delta sigma modulator.
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| ds3 | 
This star is a self-contained third order delta sigma modulator. 
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| dtoa | 
This star simulates a digital to analog converter.  
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| ecountfap | 
This star compares two data streams for "equality" (use for BER). Appends to file.
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