University of Rochester / Ultrasound Research Laboratory
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SystemGain Class Reference

Class used to control the time varying gain of the 16 receiver channels. More...

List of all members.

Public Members

Detailed Description

Class used to control the time varying gain of the 16 receiver channels.

$Revision: 1.1 $

Examples:
pe3.cpp.

Member Function Documentation

SystemGain::SystemGain( float t0, float t1, BYTE v)

This constructor will set the time intervals and initialize the TGC ram

inline unsigned SystemGain::GetTgcWaveLength( void)

Returns the number of points in the TGC waveform

inline BYTE* SystemGain::GetTgcWaveform( unsigned i)

If the TGC type is a CommonGainWave (CGW) it will always return a pointer to the 0th TGC waveform. If the TGC type is an UncommonGainWave (UGW) it will return a pointer to the ith TGC waveform. The argument i is limited to a the range 0:15

void SystemGain::SetTgcLut( char *name)

Function used to read the static TGC lookup table. Data are read from an ascii file whose name is in the string name. The first line of the file should contain the number of entries N in the table. N is usually 256 corresponding to the 256 different TGC values. The next N lines should each contain 16 floating point values describing the gain (linear scale) of the 16 receiver channels.

void SystemGain::SetTgc4DLUT( char *name)

Function used to fill the dynamic TGC lookup table from the file name. The file contents are binary with the following format: 












inline float SystemGain::GetGainVal( BYTE ichan, BYTE i) const









Function returns the value of the ith point on ichan from the 
static TGC lookup table










inline float*  SystemGain::GetGainPtr( unsigned i)









  If the TGC type is a CommonGainWave (CGW) it will always return a pointer to 
  the 0th gain waveform.
  If the TGC type is an UncommonGainWave (UGW) it will return a pointer to the 
  ith gain waveform. The argument i is limited to a the range 0:15










inline WORD*  SystemGain::GetImpResPtr( WORD first, WORD last, WORD ichan)



















inline float*  SystemGain::GetTgcLutPtr( unsigned ichan)









  Function returns a pointer to the Static TGC lookup table for channel ichan.










inline short SystemGain::GetImpResLength( void)






 Function returns the number of points in the Impulse response waeform 







inline float SystemGain::GetTimeWindow( void) const






 Function returns the time interval overwhich the TGC waveform is valid 







inline float SystemGain::GetTime0( void) const






 Function reurns the private variable t_start







inline float SystemGain::GetTime1( void) const






 Function reurns the private variable t_stop







inline float SystemGain::GetAcqDelay( void) const






 Function reurns the private variable t_delay







inline float SystemGain::GetAcqTime( void) const






 Function reurns the private variable acq_time







void SystemGain::InitTgcRam( BYTE val)









  Sets the front part of each TgcRam to user specified value










void SystemGain::SetTgcValue( BYTE channel, BYTE val)









  Sets the particular channel of TgcRam to user specified value









The documentation for this  class was generated from the following files:


Software written by

Larry Busse of LJB Development

and Bill Glenn, Al Murphy and John Losche of TETRAD
Corporation

Documentation generated 3/11/1999