NETWORK2.DOC.....Documentatio� fo� th� progra� NETWORK.COM.

     Compute� modelin� o� electrica� network� i� � rea� tim� save� fo� R� �
engineers�  Engineerin� CA� (Compute� Aide� Design� program� includ� �
basicall� tw� type� o� software� analytica� an� synthesis�  Analytica� �
softwar� derive� th� circui� characteristic� suc� a� gai� an� phas� fro� �
give� componen� values� Synthesi� doe� jus� th� reverse� startin� wit� �
desire� circui� characteristic� suc� a� filte� type� bandwidth� an� rollof� �
t� deriv� th� componen� value� required�  Th� progra� include� i� thi� �
librar� analyze� � passiv� ladde� o� cascade� network�  On� valuabl� us� o� �
thi� progra� i� analysi� an� verifacatio� o� existin� circui� designs�  �
Using the editor function, it is also possible to optimize a circuit design.

     Mos� R� network� ca� b� modele� a� � serie� o� cascade� circui� �
element� suc� a� serie� o� paralle� (shunt� resistors� capacitor� o� �
inductors�  Th� 1� circui� model� include� i� thi� progra� ma� b� cascade� �
t� for� almos� an� typ� o� filter� impedanc� matchin� network� o� �
transmission line network.
     Thi� progra� allow� yo� t� ente� componen� value� an� obtai� � char� o� �
insertio� loss� retur� loss� VSWR� reflectio� coefficien� (Rho)� an� bot� �
rea� an� imaginar� inpu� impedances�  Circuit� ma� b� completel� modele� �
befor� th� breadboar� stage� savin� muc� tim� wit� han� calculation� o� �
trial and error in the lab.
     NETWORK.CO� i� � Turb� Pasca� co� fil� an� i� designe� t� ru� unde� �
CP/� 2.� systems�  Th� progra� ha� no� bee� teste� unde� an� othe� �
envirnment but should be ok on most systems.








































�
                       CIRCUIT MODELS
                       ------- ------

Type 1: Series resistance. (R)

*--RRRRR--*


*---------*


Type 2: Paralell resistance. (R)

*----+----*
     |
     R
     R
     R
     R
     |
*----+----*


Type 3: Series inductance. (L)

*--LLLLL--*


*---------*



Type 4: Paralell inductance. (L)

*----+----*
     |
     L
     L
     L
     L
     |
*----+----*


Type 5: Series capacitance. (C)

*--CCCCC--*


*---------*


Type 6: Paralell capacitance. (C)

*----+----*
     |
     C
     C
     C
     C
     |
*----+----*



�

Type 7: Series - Series RLC

*--RRRRR--LLLLL--CCCCC--*



*-----------------------*



Type 8: Paralell - Series RLC

*----+----*
     |
     R
     R
     R
     |
     L
     L
     L  
     |
     C
     C
     C
     |
*----+----*



Type 9: Series - Paralell RLC

    --RRRRR--
   |         |
*--+--LLLLL--+--*
   |         |
    --CCCCC--


*---------------*



Type 10: Paralell - Paralell RLC

*--+-----+-----+----*
   |     |     |
   R     L     C
   R     L     C
   R     L     C
   |     |     |
*--+-----+-----+----*



Type 11: Series - Series RL/Series - Paralell C

*-+-RRRRR--LLLLL-+-*
  |              |
   ---CCCCC------


*------------------*

�

Type 12: Transmission line (Stripline)

*------------------*



*------------------*



Type 13: Open paralell stub.

*-----+------------*
      |
*-----)--+---------*
      |  |
      |  |
      |  |



Type 14: Shorted paralell stub.

*-----+------------*
      |
*-----)--+---------*
      |  |
      |  |
      |  |
       --



Type 15: Open series stub.

      |  |  
      |  |  
*-----+  +-------*

*----------------*



Type 16: Shorted series stub.

        ----
       |    |
       |    |
*------+    +-----*

*-----------------*



Type 17: Transformer.

*-----+ :: +-------*
      ) :: (
      ) :: (
      ) :: (
      ) :: (
*-----+ :: +-------*


�
PROGRAM DESCRIPTION
------- -----------

     Th� progra� i� divide� int� fou� sections� dat� input� dat� editor� �
computation and data output.
     Unit� use� i� th� progra� hav� bee� optimize� fo� us� a� R� an� ar� i� �
ohms� nanohenries� picofarads� inches� degree� an� megahertz�  Th� maximu� �
numbe� o� circui� section� ha� bee� se� t� 3� bu� thi� i� jus� arbitrar� a� �
most computers have more than enough memory to allow more sections.
     Th� progra� als� allow� network� t� b� save� an� retreive� fro� dis� �
files.  This feature can save you much time and effort at entering elements.


PROGRAM EXAMPLE
------- -------
Example 1: Impedance match to a real load.

                 50 ohms                 318 nH
             +---XXXXXX---*-----+-----*---LLLLL----*----+
             |                  |                       |
            / \                 C                       X   
           | ~ |                C 637 pF                X 10 ohms
            \ /                 C                       X
             |                  |                       |
             +------------*-----+-----*------------*----+
                          :           :            :
Element #         RS      :    1      :     2      :      RL
                          :           :            :
Element type      --      :    6      :     3      :      --
                          :           :            :


     Let� tr� � simpl� exampl� i� orde� t� becom� familia� wit� th� progra� �
operation�  Star� wit� th� circui� i� Exampl� 1�  Thi� i� � low-pas� �
impedanc� matchin� networ� tha� i� use� t� matc� � 5� oh� sourc� (RS� t� � �
5� oh� resistiv� loa� (RL� a� 1� Mhz�  W� wil� verif� tha� th� matc� take� �
plac� a� 1� Mh� an� the� determin� th� � d� cut-of� frequency� th� retur� �
loss and the VSWR within the pass-band.
     Afte� loadin� an� runnin� th� program� th� firs� questio� i� i� th� �
networ� i� � (N)E� o� (S)AVE� network�  Ente� "N"� the� th� scree� wil� �
clea� an� as� fo� th� numbe� o� circui� sections�  Ente� 2�  Remembe� no� t� �
coun� th� sourc� (RS� an� loa� (RL� resistances�  Nex� th� progra� wil� as� �
fo� th� valu� o� th� sourc� resistance�  Ente� 50�  Th� progra� wil� the� �
star� loopin� throug� th� networ� elements�  Ente� th� networ� typ� numbe� �
an� th� componen� value� a� prompted�  Fo� eac� elemen� numbe� (#� � listin� �
o� th� possibl� elemen� type� wil� b� displayed�  Ente� elemen� typ� � �
(paralel� C� an� � capacitanc� o� 63� pF�  Nex� ente� elemen� typ� � (serie� �
L� wit� a� inductanc� o� 31� nH� Afte� yo� hav� entere� al� o� th� circui� �
element� yo� wil� b� aske� fo� th� valu� o� th� loa� resistance�  Ente� 1� �
ohms.  At this point the data entry is completed.
     Nex� yo� wil� b� aske� fo� th� startin� frequency� ste� frequenc� an� �
th� numbe� o� steps�  Fo� scree� outpu� thi� shoul� b� 2� o� less�  Fo� �
printe� outpu� thi� ma� b� increase� a� desired�  Ente� � startin� frequenc� �
o� � Mhz� � ste� frequenc� o� � Mh� an� 2� steps�  Nex� yo� wil� b� prompte� �
fo� scree� o� printe� output�  Respon� wit� "S� o� "P"�  Th� scree� wil� �
clea� an� afte� � shor� dela� th� result� wil� b� displaye� o� th� scree� �
(S) o� on both the screen and the printer (P).
     Whe� th� calculation� ar� complete� yo� shoul� obtai� th� result� show� �
i� th� tabl� below�  Not� tha� a� 1� Mh� th� sourc� (5� ohms� i� indee� �
matche� t� th� loa� (1� ohms)�  A� thi� poin� th� insertio� los� i� zer� d� �
an� th� retur� los� i� nearl� 6� d� an� th� VSW� i� 1.00:1� Als� not� tha� �
th� reflectio� coeffecien� (RHO� i� zero� th� rea� par� o� th� inpu� �
impedanc� (ZIN(R)� i� nea� 5� ohm� an� th� imaginar� par� o� th� inpu� �
impedanc� (ZIN(I)� i� zer� ohms�  Not� tha� th� cut-of� frequenc� i� abou� �
14.5 Mhz.
�
              =====================================
              RF NETWORK ANALYSIS PROGRAM - VER 2.0 
              =====================================

NETWORK LISTING:

ELEM      TYPE         R         L         C
                     (ZO)       (L)       (E)

SOURCE R              50
 1          6          0         0       637
 2          3          0       318         0
LOAD R                10

NOTE:  R,L,C ARE FOR ELEMENT TYPES 1-11.
       ZO,L,E, ARE FOR ELEMENT TYPES 12-16.

              =========================================

FREQ(MHZ)     IL(DB)     RL(DB)     VSWR       RHO      ZIN(R)       ZIN(I)

    1.00      -2.51      -3.57      4.93      0.66      10.15         1.60
    2.00      -2.40      -3.72      4.74      0.65      10.60         3.25
    3.00      -2.21      -4.00      4.42      0.63      11.42         4.98
    4.00      -1.94      -4.43      4.01      0.60      12.72         6.83
    5.00      -1.61      -5.08      3.52      0.56      14.70         8.81
    6.00      -1.23      -6.08      2.97      0.50      17.71        10.86
    7.00      -0.82      -7.63      2.42      0.42      22.30        12.72
    8.00      -0.43     -10.27      1.88      0.31      29.34        13.50
    9.00      -0.12     -15.51      1.40      0.17      39.40        10.76
   10.00       0.00     -61.93      1.00      0.00      49.92         0.00
   11.00      -0.15     -14.69      1.45      0.18      51.31       -18.94
   12.00      -0.62      -8.73      2.15      0.37      39.42       -33.26
   13.00      -1.40      -5.60      3.21      0.52      25.36       -36.35
   14.00      -2.40      -3.73      4.73      0.65      15.73       -33.77
   15.00      -3.52      -2.56      6.84      0.75      10.01       -29.98
   16.00      -4.69      -1.80      9.67      0.81       6.64       -26.47
   17.00      -5.86      -1.30     13.35      0.86       4.58       -23.53
   18.00      -7.00      -0.97     17.97      0.89       3.28       -21.12
   19.00      -8.09      -0.73     23.70      0.92       2.42       -19.15
   20.00      -9.13      -0.57     30.68      0.94       1.83       -17.51




     Followin� th� outpu� data� � shor� men� i� displaye� a� th� botto� o� �
th� screen�  Ther� ar� fiv� option� liste� i� th� menu�  (1� swee� �
frequency� (2� edi� elements� (3� star� over� (4� qui� an� (5� sav� file�  �
A� thi� point� yo� ca� chang� frequenc� rang� o� direc� outpu� t� th� �
printe� wit� optio� (1)�  O� yo� ca� edi� th� elemen� value� t� "fin� tune� �
you� circui� wit� optio� (2)�  Optio� (3� wil� allo� yo� t� star� ove� wit� �
� ne� o� save� network� Optio� (4� exit� th� progra� bac� t� MBASIC�  Th� �
last option (5) allows you to save the current network to a disk file.
     Whe� savin� � fil� t� disk� onl� ente� th� nam� o� th� fil� whe� �
prompte� no� th� fil� exten� e� LOWPAS� no� LOWPASS.NET�  Th� exten� o� .NE� �
is automatically added by the program.

     NOTE� B� sur� th� fil� nam� yo� pic� doe� no� duplicat� on� alread� o� �
th� dis� unles� yo� wis� t� overwrit� th� ol� file�  Th� progra� wil� no� �
let you know that the file already exists.


PROGRAM HISTORY
------- -------
     Thi� progra� i� derive� fro� on� writte� b� Kennit� Wyat� o� TR� ��Electroni� Product� Division�  Hi� progra� wa� writte� fo� th� IB� P� an� �
include� � featur� t� creat� h� resolutio� graphi� plot� o� th� data�  � wa� �
force� t� dro� thi� featur� whil� convertin� th� progra� t� CP/� Pascal 
becaus� m� termina� doe� no� hav� th� capibilit� t� d� graphics�  I� yo� wis� 
t� ad� thi� featur� t� you� cop� o� th� program� pleas� contac� m� o� GENIE�  
M� mai� addres� ther� i� W.MUNSON�  � wil� giv� yo� th� informatio� o� ho� h� �
did it and you should be able to take it from there.  Good luck and enjoy.