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Constants.h
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Constants.h
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//
// Copyright 2004-2010, Thomas C. McDermott, N5EG
// This file is part of VNAR - the Vector Network Analyzer program.
//
// VNAR is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// VNAR is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with VNAR, if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
#pragma once
// Constants.h
//
// 07-25-04 TCM Original
// 05-10-05 TCM Delete VNA_XTAL_CONST and refereces to it. This is now
// handled by an Internal Crystal Calibration function.
// 03-19-06 TCM Add constants for the S21 measurement level offsets for
// Mid and Lo levels.
// 02-27-07 TCM Add constants for ExpectedValue mode, redefine glitch
// constants.
// 05-26-07 TCM Add constants for epsilon (allowed error before applying median
// filter).
// 06-08-2007 TCM Add constants for phase lead caused by 2 highpass poles in the
// modamp AC coupling circuit.
// 09-30-2007 TCM Add TargetPhLoMAG constant - to measure S21 phase with reduced generator
// output level. This avoids rx preamp overload of the phase detector on
// 'hot' rx signals.
//
// Constants for the VNA instrument + others.
//
#include <math.h>
///\def Converts radians to degrees
#define RAD2DEGR 180.0/Math::PI
///\def Converts degrees to radians
#define DEGR2RAD Math::PI/180.0
// Constants related to the actual numeric VNA instrument readings
// These are used until the Detector Calibration is run or loaded from a file.
//#define MAXREFLMAGNITUDE 2100 // temporary until Detector Calibration is run,
// observed on S/N 1
#define MAXTRANMAGNITUDE 3800 // temporary until Detector Calibration is run,
// observed on S/N 1
// Constants related to calibration grid (both instrument calibration and fixture calibration)
///\def Maximum Calibration Frequency
#define MAXCALFREQ 300000000
///\def Minimum Calibration Frequency
#define MINCALFREQ 400000
///\def Number of Calibration Points
#define NUMCALPTS 1024.0
///\def Size of Phase Calibration Grid
#define PHASECALGRIDSIZE 1024
///\def Error size for double-precision rank-order median filter
#define EPSILON 0.005
// def Maximum DDS output level DAC control word
//#define MAX_DDS_LEVEL 0xFFF // Multiplier for DDS Amplitude, unsigned 12-bit int. Maximum = 0xFFF
// Set the 0 db level to 2.5 dB below the maximum possible level
//#define MAX_DDS_LEVEL 0xC00 // Multiplier for DDS Amplitude, unsigned 12-bit int. Maximum = 0xFFF
///\ DDS Maximum Level Control
// Set the ~0 db level to 3 dB below the maximum possible level
#define MAX_DDS_LEVEL 0xB4F // Multiplier for DDS Amplitude, unsigned 12-bit int. Maximum = 0xFFF
// this constant is not dependent on MAX_DDS_LEVEL since it references the Q-DAC
#define QDAC_ZERODBM 0xAAA //0xAAA // 0 dbm for Q-DAC ref level
//0xFFF // about +3.5 dB too hot for Q-DAC
// constants used by Time Domain display
//#define TDRTIMETICK 4.167 // 4.167 nanoseconds per TDR time tick
#define TDRTIMETICK ((1.0/(double)VNA->GetMaxFreq())*1e9)
#define METERSPERNSEC 0.2998 // meters per nanosecond - free space
#define FEETPERNSEC 0.9836 // feet per nanosecond - free space
// constants that set the Mid and Lo levels for the target to measure S21 magnitude
#define TARGETMIDMAG 17
#define TARGETLOMAG 34
// constant - sets Lo output level for the target to measure S21 phase with non-overloading signals
#define TARGETPHLOMAG 20
// constant: sample-to-sample deviation that constitutes a glitch (bad reading)
#define GLITCHSIZE 30
// Calling ExpectedValue with mode==true tests for phase detector saturation
#define PHASEMODE true
#define AMPLMODE false
// Should normally only define one of either FASTGLITCH or SLOWGLITCH as true
//#define FASTGLITCH // use FAST glitch correction algorithm
//#define SLOWGLITCH // use SLOW glitch correction algorithm
/// Array index enumeration for ReflectionMeasurements (in InstrumentCal and DisplayRoutines)
enum ReflMeas { MagQ, PhaseI, PhaseQ }; ///< Array index for storing reflection measurements
#define HIGHPASSPOLE (0) // Phase lead caused by 2 highpass
// poles of AC coupling capacitors in the ModAmp.
// 6.2 degrees at 200 Khz.
// #define SHORT_RANGE 3800
#define SHORT_RANGE 32000
#define MAX_PHASE 181.0
#define MIN_PHASE -181.0
#define NormalizePhase(X) { while ((X) > 180.0) (X) -= 360.; while ((X) < -180.0) (X) += 360.0; }
#define PHASE2SHORT(X) (short)(((X) - MIN_PHASE) * SHORT_RANGE / (MAX_PHASE - MIN_PHASE))
#define SHORT2PHASE(X) (((double)(X) * (MAX_PHASE - MIN_PHASE) / SHORT_RANGE ) + MIN_PHASE )
#define MAX_DB +30.0
#define MIN_DB -180.0
#define DB2SHORT(X) (short)((X)>MIN_DB?((X) - MIN_DB) * SHORT_RANGE / (MAX_DB - MIN_DB):0)
#define SHORT2DB(X) (((double)(X) * (MAX_DB - MIN_DB) / SHORT_RANGE ) + MIN_DB )
//#define MAXSAMPLEVALUE ((int)((((unsigned long)1)<<(VALIDSAMPLEBITS - 1))-8))
#define MAXSAMPLEVALUE 0.9999999
// #define MAXSAMPLEVALUE ((int)((((unsigned long)1)<<(15))-8))
#define todb(X) (20.0f * log10 ((float(X)/(float)MAXSAMPLEVALUE)))
#define toLin(X) ( pow((float)10,(float)(X/20.0)) * (float) MAXSAMPLEVALUE)
#define CALSUM 7 //number of measurements to average for calibration