constants.h

USB 上位机程序 VNA使用,网络分析仪原理使用仪器

//
//    Copyright 2004 - 2006, 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 a Internal Crystal Calibration function.
//  03-19-06    TCM Add constants for the S21 measurement level offsets for
//				Mid and Lo levels.
//
//	Constants for the VNA instrument + others.
//


///\def Converts radians to degrees
#define RAD2DEGR 180.0/3.14159265358
///\def Converts degrees to radians
#define DEGR2RAD 3.14159265358/180.0

// Unused (old) constants before detector cal routines added...
//#define MAXREADP 3800					// Full-scale phase reading observed on S/N 1
//#define MINREADP   90					// Minimum-scale phase reading observed on S/N 1
//const int MIDREADP = MAXREADP/2;		// Mid-scale phase reading
//#define MODMIDREADP (MAXREADP+MINREADP)/2  // modified mid-scale phase reading

//const int UPLIMITP = MAXREADP - MAXREADP/4;	// Phase readings upper quartile
//const int DNLIMITP = MAXREADP/4	;		// Phase readings lower quartile



//	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 CALIBRATION is designed,
										// observed on S/N 1
#define MAXTRANMAGNITUDE 3800			// temporary until CALIBRATION is designed,
										// observed on S/N 1

///\def Maximum Calibration Frequency
#define MAXCALFREQ 120000000.0
///\def Minimum Calibration Frequency
#define MINCALFREQ 200000.0
///\def Number of Calibration Points
#define NUMCALPTS 1024.0


// 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 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
#define TARGETMIDMAG	17
#define TARGETLOMAG		34

// constant: sample-to-sample deviation that constitutes a glitch (bad reading)
#define GLITCHSIZE		30
#define	FASTGLITCH			// use FAST glitch correction algorithm