Monster Media 1994 #2/Monster Media No. 2 (Monster Media)(1994).ISO/business/resnet33.zip/SHAREMAN.TXT

Text File | 1994-06-28 | 16KB | 376 lines

            RESNET 3.3 Shareware Manual































Notor Research
1548 Arata Court
San Jose, CA 95125


COPYRIGHT INFORMATION

This manual is Copyright (c) John Notor, 1993,1994, All Rights Reserved.

ASP OMBUDSMAN POLICY

    "This program is produced by a member of the Association of Shareware
    Professionals (ASP).  ASP wants to make sure that the shareware
    principle works for you. If you are unable to resolve a
    shareware-related problem with an ASP member by contacting the member
    directly, ASP may be able to help. The ASP Ombudsman can help you
    resolve a dispute or problem with an ASP member, but does not provide
    technical support for members' products.  Please write to the ASP
    Ombudsman at 545 Grover Road, Muskegon, MI 49442-9427 USA, FAX
    616-788-2765 or send a CompuServe message via CompuServe Mail to
    ASP Ombudsman 70007,3536."

DISCLAIMER AGREEMENT AND SHAREWARE EVALUATION LICENSE

Users of RESNET must accept the following disclaimer of warranty:

RESNET is supplied as is.  The author disclaims all warranties,
expressed or implied, including, without limitation, the warranties
of merchantability and of fitness for any purpose. The author assumes
no liability for damages, direct or consequential, which may result
from the use of RESNET.

RESNET is a shareware program and is provided at no charge to the
user for EVALUATION ONLY.  Feel free to share it with your friends,
but please do not give it away altered or as part of another system.
If you like the program and want to make it a permanent part of your
software toolbox, you must register to obtain the right to continue
to use the program.

You are temporarily licensed to use this shareware version of RESNET
for an evaluation period not to exceed 30 days from the date you
received this copy. After this evaluation period, you must register
to continue to legally use RESNET (see the section called REGISTRATION
below for details). Continued use without payment of the registration
fee is a violation of the copyright laws and subject to prosecution.

When you pay a single user registration fee, you will have full legal
rights to the continued use of one copy of RESNET. This single user
licensed copy may be used by any number of people and may be freely
moved from one computer location to another, so long as there is no
possibility that it will be used at more than one location at the same
time. If you need multiple copies of RESNET, contact Notor Research to
obtain a site license. Site licensing offers a low cost way to license
multiple users within a business, or other organization.

Commercial users of RESNET must register and pay for their copies of
RESNET within 15 days of first use or their license is withdrawn.

Anyone distributing RESNET for any kind of remuneration must first contact
NOTOR RESEARCH at the address below for authorization.  This authorization
is automatically granted to ASP vendor and BBS members in good standing.
Contact Notor Research to receive the latest version of RESNET.

You are encouraged to pass a copy of RESNET along to your friends for
evaluation.  Please encourage them to register their copy if they find
RESNET useful.

DEFINITION OF SHAREWARE

Shareware distribution gives users a chance to try software before buying
it. If you try a shareware program and continue using it, you are expected
to register. Individual programs differ on details_some request registration
while others require it, some specify a maximum trial period. With
registration, you get anything from the simple right to continue using the
software to an updated program with printed manual.

Copyright laws apply to both shareware and commercial software, and the
copyright holder retains all rights, with a few specific exceptions as
stated below. Shareware authors are accomplished programmers, just like
commercial authors, and the programs are of comparable quality. (In both
cases, there are good programs and bad ones!) The main difference is in
the method of distribution. The author specifically grants the right to
copy and distribute the software, either to all and sundry or to a specific
group. For example, some authors require written permission before a
commercial disk vendor may copy their shareware.

Shareware is a distribution method, not a type of software. You undoubtedly
want to find software that suits your needs and pocketbook. The shareware
approach makes fitting your needs easier, because you can try before you buy.
And because the overhead for the author is low, prices are low also.

Shareware is the ultimate in a satisfaction guaranteed product_if you
don't use the product, you don't pay for it.

REGISTRATION

When you register RESNET, you become a licensed user of the program,
entitling you to:

1. a minimum of 3 months free support via phone, FAX, CompuServe Information
Service email, America Online email, or Internet email

2. a copy of the latest version of the program

3. a printed manual.

In addition, you will be entitled to upgrade discounts on new releases of
RESNET, as well as discounts on new software releases.

To register RESNET, send $19.95 + $3.00 shipping and handling to:

         Notor Research
         1548 Arata Court
         San Jose, CA 95125

California residents must include applicable sales tax.

For your convenience, we have included the file REGISTER.TXT with this
version of RESNET. You may print the file and fill it out by hand, or you
may fill it out using a text editor or word processing program. If you are
a Microsoft Windows user,  we recommend you register using the REGISTER.WRI
file, and the Windows Write editor. As an alternative, you may print the
registration form by starting RESNET and pressing <F4> as indicated by the
registration reminder screen.

If you have questions or comments about RESNET, you can contact
Notor Research by phone or FAX at [phone] [for FAX, press SEND
when you here the phone ring, don't wait for FAX signals], or by sending
CompuServe email to John Notor, 75075,467, or America Online mail to JNOTOR,
or sending mail via Internet to [e-mail].

ABOUT RESNET

INTRODUCTION:

RESNET provides you with a simple way to design common resistor networks
like voltage dividers and attenuators. With RESNET you supply the desired
results and the program takes care of the analysis.

For example, a voltage divider network design is as simple as entering
the voltages and the bias current, and your done. RESNET eliminates the
need for a lookup table when you want tight tolerance components. You select
the tolerance and the program does the lookup. And, for those occasions when
the exact value is what you want, select the EXACT tolerance option, and
you've got it.

A must for attenuator design, RESNET offers a variety of styles for the
exact configuration you need for your project. Included in this version
of RESNET is support for Pi and T single-ended attenuators, O and H balanced
attenuators, and, for resistive matching applications, the minimum loss pad.
You may specify the terminating impedances separately for those circuits
which have unequal source and load impedances.

RESNET automatically calculates either the exact resistor values or the
closest standard resistor value according to the tolerance you specify,
an especially handy feature in those cases where you may be using 1% or
tighter tolerances. The program includes the following tolerance options:
exact, 0.1%, 0.2%, 0.5%, 1%, 2%, 5%, and 10%.

Included with RESNET is a Standard Resistor Value Calculator, a useful
tool in general circuit design to convert calculated resistor values to
standard values. The calculator displays standard values for all the above
mentioned tolerances simultaneously and covers resistor values from 1 Ohm
through 10 MOhms.

For your convenience, RESNET saves your last set-up configuration when you
exit the program.

HARDWARE REQUIREMENTS:

RESNET requires an IBM-PC, XT, AT or compatible running DOS v2.0 or higher,
with 256K of memory, and a monochrome, CGA, EGA, VGA, or Hercules compatible
display card. The program may be run either from a floppy disk or harddisk
drive.

RESNET will run as a DOS program under Windows 3.1.

GETTING STARTED WITH RESNET:

When you start RESNET the first time, the program asks:

Do you have a color monitor [Y/N]?

Type Y if you have a color monitor, N if you don't.

After you respond, RESNET creates a file called RESNET3.OPT on the default
drive which includes the program start-up options. As you use RESNET and
then exit the program, the RESNET3.OPT file is updated with the current
option settings. Any OPTIONS selections which you made become the default
settings when you next use RESNET.

If you have not registered RESNET, the next screen will be a registration
reminder screen. Press <F4> to print a registration form, or <ENTER> to
continue.

Next the opening screen is displayed. The opening screen shows:

1. the default network selection (the Pi Attenuator, if the program is
being loaded for the first time, or the last network you selected if
you have been designing with another network style);

2. the data entry boxes, which allow you to set the network design
parameters;

3. the default resistor value tolerance (1% if you are loading the program
for the first time, or the last tolerance value you selected - the tolerance
selection identifies the set of standard resistor values used in calculating
the resistor values;

4. the function key command line.


FUNCTION KEY OPERATION:

F2-Style:

F2 selects the resistor network type: Pi, T, Min Loss Pad, O and H balanced
attenuators are the available, as well as  Minimum Loss Pad, Resistor Divider
and a Voltage Divider networks. Pressing F2 repeatedly scrolls through the
network styles until you find the one you wish to use.

F3-Options:

F3 displays a group of options: Rcalc, Tolerance, and Colors; to select one
of the options use the up or down arrow keys and then hit the ENTER key, or
just type the first letter of the option name. Pressing <ESC> exits the
options window.

Rcalc is a built-in standard resistor value calculator, which displays the
nearest standard commercial values in 0.1% through 10% tolerances to the
value you enter. Rcalc also displays the equivalent noise voltage of the
exact resistor value you enter. This handy utility will keep you from
rummaging through catalogs and miscellaneous pieces of paper when you need
to find the closest commercially available value for a resistor. Press the
<ESC> key to exit Rcalc.

Tolerance displays a list of standard value tolerances. Select the one
that you would like to use in calculating attenuator values by using the
arrow keys. Press ENTER to complete your selection. Pressing <ESC> exits
with no change.

Colors displays a list of screen color suites. Pick the one that suits
you best by using the arrow keys. Press ENTER to complete the selection
and change the display color, or just type the first letter of the selection
you would like. <ESC> exits with no change.

F5-Quit:

Pressing F5 saves the current options and style selections and exits the
program.

DESIGNING WITH RESNET

Pi, T, O, and H Style Attenuators

Entering and editing data for RESNET attenuators involves defining the
input and output impedances (in Ohms) and the attenuator Loss in dB. First
select the attenuator style you would like to use with the F2 key. Then,
using the arrow keys, move the cursor to the input impedance (Ri) data
cell and type in the new value. Note: do not press <Enter> yet. Pressing
the <Enter> key causes RESNET to calculate new resistor values based on
the currently displayed data. Now move the cursor to the output impedance
(Ro) data cell and enter the new value. Finally, move the cursor to the
Loss cell and enter the new value.

For any attenuator loss value, there are ratios of input to output impedance
that are mathematically invalid. RESNET checks for the validity of the
values of Ro and Ri before completing the calculation.  If your design
specifies a value of Ro not equal to the value of Ri, the Loss value of
the attenuator must be a certain minimum value. If this criterion is not
met by the displayed data at the time you press the <Enter> key, RESNET
will beep and display the following message:

***Loss value must be at least xx dB ***

where, instead of 'xx', an actual value will be displayed.

Decreasing the larger value of Ro or Ri, increasing the smaller value of
Ro or Ri, or increasing the value of the attenuator loss will allow a
valid calculation. Note that the Minimum Loss Pad is a good choice if
the attenuator is primarily intended to resistively match impedances.
The Minimum Loss Pad calculator displays the loss in dB based on your
design data. As it turns out, the Loss value for a Minimum Loss Pad for
any valid value of Ro and Ri is exactly the minimum value of loss for any
attenuator style with the same values of Ro and Ri.

Notice that as you enter data, the cell editor clears the current value,
except for the decimal point, when the first key you press is a number key.
If you only wish to change a single digit of any cell value, use the arrow
keys to select the digit, delete it and then enter the new value.
Alternatively, if you press the <Insert> key, the cell editor will allow
you to type over any digit. If you start to edit the wrong cell, press
the <ESC> key and the data will be restored to the cell unedited.

The cell editor allows only the following data to be entered:

o Ro and Ri may be positive integer values between 1 and 1000 Ohms.

o Loss values for any attenuator style may be positive values between
0.1 and 50 dB in 0.1 dB increments.

Minimum Loss Pad

Data entry for Minimum Loss Pad designs is similar, except that you enter
only the values of Ro and Ri. Note that the Minimum Loss Pad in RESNET is
designed with the larger impedance as Ri and the smaller as Ro. In an actual
circuit, you may physically reverse the pad elements so that R2 is at the
input of the pad and R1 is at the output.  Note that R2 remains the resistor
to ground and R1 the resistor in series in this reversed configuration.

Resistor Divider

For Resistor Divider designs, you enter attenuation in dB, and Rs, the
equivalent source resistance of the network, in kOhms, and RESNET does
the rest. Remember that the values calculated by RESNET for a Resistor
Divider assume a voltage source drive with zero source resistance and a
load resistance much greater than Rs. Generally, if the source resistance
is less than one tenth of Rs and the load resistance is greater than 10
times Rs, the resulting attenuation will be no more than 10% higher than
the desired value.

Voltage Divider

For Voltage Dividers, you enter the maximum positive voltage, V+, the
minimum negative voltage, V-, the output voltage, Vo, and the bias current,
I.  Note that the units are Volts and milliamperes (V, mA) for supply
voltages and bias currents. Positive or negative voltages may be used,
but V+ must always be greater than V-, and I is assumed to be a positive
current. Naturally, the value of Vo must lie between the values of V+ and V-.

WE'RE HERE TO HELP

If you have problems using RESNET or have suggestions that you believe
would improve the program, please contact us at Notor Research.