World of Ham Radio 1997

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U s e r ' s M a n u a l S L O P I N G V E E D E S I G N P R O G R A M S (C) 1991-1992 Phadean Engineering Co., Inc. Post Office Box 611 Shrewsbury, MA 01545-8611 U.S.A. (508) 869-6077 All Rights Reserved Worldwide. Unauthorized Copying or Distribution of Software, Data Files, Text Files, Printed Material, or Other Material Copyrighted by Phadean is Strictly Prohibited Without Prior Written Authorization. INTRODUCTION The Sloping Vee program disk contains the following executable programs: SVRIN.EXE, SVAPEX.EXE, SVPATT.EXE, and XYPLOT6.EXE. Also on the disk are several video set-up files (CFG extension), sample output files (SMP extension), batch command files (BAT extension), print files (WPP extension), and ASCII text files (TXT extension). The EXEs will not run correctly unless you follow the installation procedure described below. SVRIN computes the Vee's input resistance. SVAPEX computes optimum apex angle. And SVPATT computes the power gain pattern. The programs prompt you for required input data, and out-of-range values will not be accepted. The diagrams accompanying your program disk define required input parameters. Refer to those diagrams until you are familiar with each program's input. Each of the Vee programs creates the same output data file, XYPLOT6.DAT. This file is used as input by XYPLOT6.EXE to generate screen plots. Every execution of SVRIN, SVAPEX, or SVPATT overwrites this data file. If you want to save the data in XYPLOT6.DAT, be sure to copy or rename it to some other filename. XYPLOT6.EXE uses a standard format ASCII data file whose format is described below. All run parameters for each of the Vee programs are contained in XYPLOT6.DAT's header. By editing the data file, you can change the screen plot's appearance (titles, number of grid lines, and so on - see below). You can run XYPLOT6.EXE by itself to plot other data contained XYPLOT6.DAT, and you can create XYPLOT6.DAT to contain any data you wish. Just be sure to follow the prescribed format if you create your own version of XYPLOT6.DAT. Up to six curves can be plotted on the screen at one time. INSTALLATION The Sloping Vee programs are contained on one 5.25" 360 KB IBM-compatible floppy diskette. The programs may be executed from a hard disk or from the floppy. Installing the programs on a hard disk system, which is the preferred approach, is straightforward. Just copy the distribution diskette onto the hard disk. To use the Vee programs, there is one file that you must create, and there are a few recommended procedures that you should follow. Before installing the Vee programs, please read these instructions carefully. The few minutes you spend now will save time and frustration later. (a) Create the working directory where you want to install the vee programs using the DOS MD (make directory) command. The recommended directory is SV created using the command line MD \SV. (b) Copy all files from the vee program diskette into the working directory using the DOS COPY command. For example, the command line COPY A:\*.* \SV will copy all the required files. (c) You must select the type of graphics supported on your computer and create the file HDWRE.CFG by copying one of the graphics file from the following list into HDWRE.CFG: -2- PC Video Mode File to Copy into HDWRE.CFG Text mode VIDEO0.CFG 320x200 medium resolution CGA, 4 colors; text width 40. VIDEO1.CFG 640x200 high resolution CGA, 2 colors text width 80. 720x348 HGC monochrome graphics. VIDEO2.CFG 720x348 HGC monochrome graphics. VIDEO3.CFG 320x200 EGA medium resolution, 16 colors. VIDEO7.CFG 640x200 EGA high resolution, 16 colors. VIDEO8.CFG 640x350 EGA enhanced resolution with enhanced display (4 or 16 colors, depending on memory). VIDEO9.CFG 640x350 EGA high resolution using monochrome monitor. VIDEO10.CFG 640x480 VGA or MCGA high resolution, 80x30 text, monochrome mode. Use for black/white on IBM PS/2 systems. VIDEO11.CFG 640x480 VGA high resolution, 80x30 text, 16 colors. Use on IBM PS/2 models 50, 60 and 80. VIDEO12.CFG HGC - Hercules Graphics; CGA - Color Graphics Adapter; EGA - Enhanced Graphics Adapter; VGA - Video Graphics Array MCGA - Multicolor Graphics Array After selecting the appropriate VIDEO*.CFG file from the list, create the file HDWRE.CFG using the DOS COPY command; for example, COPY VIDEO3.CFG HDWRE.CFG sets up Hercules monochrome graphics. If you encounter a problem, it is almost certain that you selected the wrong video mode, in which case you should try copying another VIDEO*.CFG file into HDWRE.CFG. Whenever you change video modes, you must recreate HDWRE.CFG using this procedure. -3- Be sure that HDWRE.CFG is located in the same working directory as the Vee programs. The programs will not run unless HDWRE.CFG is contained in the working directory and is properly configured for your system. If your computer supports only monochrome text, the Vee programs will terminate execution with an error condition, but they will create the ASCII output file XYPLOT6.DAT that contains tabulated results. (d) Files on the Vee distribution diskette are not write protected. If you delete one or more of them, accidentally or otherwise, then the file can be recovered only by using a file recovery program. However, there is no guaranty that you will succeed in recovering a deleted file; so be careful! It is advisable to write protect the executables (EXE extension) and HDWRE.CFG after installation. This prevents accidental deletion of an important file. You can do this by using the external DOS command ATTRIB to set the file attribute to +R. Do NOT write protect XYPLOT6.DAT! If you wish to execute the Vee programs from a floppy diskette, be sure that the diskette contains HDWRE.CFG in the working directory. As a general rule, 50 to 75 KB of space is more than adequate to create the data file XYPLOT6.DAT; but, depending on the specific case, more space may be needed. If you encounter errors from from diskette, check all file sizes to be sure that enough storage is available. HINTS AND TIPS Input Data The Vee programs prompt you for all required input data. If you enter an illegal value, for example, zero in a calculation that will be singular (divide by zero), the program flags the incorrect data by beeping and repeating the prompt. Just reenter correct data. If you are interested in values close to an illegal input, enter a slightly different number. For example, instead of entering "0", try something very small, such as "0.000001". Also, note that these programs use 299.8 megameters/sec as the velocity of light, which is more accurate than 300 megameters/sec which is commonly used. When several numbers are requested, each one should be separated by a space or a comma. Enter the entire sequence of requested data before pressing RETURN, which terminates data entry. -4- Screen Plots The Vee programs plot computed results directly on the screen, in addition to creating the output data file XYPLOT6.DAT. Immediate screen plotting allows you to quickly see how antenna performance varies as different parameters are changed and helps you develop insight into its behavior. Intelligent antenna design is as much art as engineering. A good designer develops intuition and judgement based on experience, which, in turn, give him a feel for how different parameters (element length or apex angle, for example) influence performance. XYPLOT6.DAT Required Format The first line of data in the file XYPLOT6.DAT must contain numerical setup parameters for the plotting routine. The sample file on the distribution diskette illustrates the format. Note that commas are used as delimiters on this line only. Commas on the other lines will result in run time errors, since they mark the end of a data block. The numbers on LINE 1 have the following significance (in order): Fraction of the screen used in the Y direction Fraction of the screen used in the X direction Number of vertical grid lines on the plot Number of horizontal grid lines on the plot Size of the X-axis label Size of the Y-axis label Number of decimal points for X-axis values Number of decimal points for Y-axis values Number of curves to be plotted (1-6) Size of the first line of the plot title Size of the second line of the plot title Size of the X-axis label Size of the Y-axis label "Any key..." message ON or OFF after plot is complete These parameters can only take on certain ranges of values. If XYPLOT6.EXE receives out-of-range data, it will be corrected. LINE 2 must contain the first line of the plot title. The second title line appears on LINE 3. These lines should be left blank if you not want titles. LINE 4 contains the X-axis label, and LINE 5 the Y-axis label. LINE 6 is reserved for comments, such as headings for the tabulated data. -5- Data are entered starting on LINE 7. The first column must contain the independent variable values, monotonically increasing from smallest to largest. In the columns that follow (1 through 6) are the pairwise data for each curve to be plotted. You must include a Y value for each X value for each curve. If you are plotting measured data for which you have only incomplete pairs of data, for example (X1,Y1), (X1,Y2),(X1,Y4) but not (X1,Y3) for four curves, you must insert some value for Y3. Otherwise, the input data will be read out of sequence and a run time error will occur. Plotting Curves You can plot screen plots on your printer using the SHIFT PrtSc keys. Before printing, you must load the DOS GRAPHICS.COM external command file to set up the screen for printing. Refer to your DOS Reference Manual for details on using GRAPHICS.COM. If you encounter difficulty in printing a plot, the problem is almost certainly an incorrect printer mode (in which case you should carefully set up the printer while referring to its User's Manual). An flexible alternative approach to generating plots is using a spreadsheet. All Vee programs create the same ASCII output file using a consistent format. Data is tabulated with run parameters in the header at the beginning of XYPLOT6.DAT. By using the "File-Import-Value" option available on most spreadsheets, you can read an entire Sloping Vee data file, including header data, into numerical or ASCII values, as appropriate, in a spreadsheet. Vee data can then be plotted in a variety of ways using the spreadsheet's plotting utilities. Users who don't have a spreadsheet program may wish to contact TRIUS, Inc., 231 Sutton Street, Suite 2D-3, P. O. Box 249, North Andover, MA 01845-0249 Voice (508) 794- 9377, FAX (508) 688-6312, BBS (508) 794-0762, 1200/2400,N,8,1. TRIUS supplies an inexpensive shareware spreadsheet with excellent capabilities (AS-EASY-AS, Ver. 5). TRIUS also supplies a useful CAD program called DRAFT CHOICE. Please note that there is no relationship between Phadean and TRIUS and that this information is provided only for your convenience.