updated 2009 January 4

WL7AML

INTERMODULATION DISTORTION ANALYSIS PROGRAM


Michael Hirsch updated version August 2017
This program will run all possible combinations of every transmitter against every receiver in the list. It will allow you to choose the bandwidth of the receivers, which is to say how far removed from a receiver carrier on the list will a hit be reported. This seperation is entered in MEGAHERTZ such as .049 or .075 and is entered each time you run the program.

The program will NOT report a hit if the DESCRIPTION of any of the frequencies is identical. If two transmitters have exactly the same description, it assumes the two frequencies are different channels in the same transmitter and cannot both be on the air at the same time. Also if a radio is not duplex as a repeater, it cannot transmit and receive at the same time. So if the receiver has exactly the same description as a transmitter, it will not report a hit. For this purpose CASE IS SIGNIFICANT! WL7aml does NOT equal WL7AML.

Descriptions are limited to 8 characters. When modifying the two files of frequencies (RFREQS & TFREQS) keep exactly the same number of characters in the frequency and the description. It reads the column the character is in to determine the information. More that the maximum number of characters will bomb the program.

The frequency files, RFREQS and TFREQS, may be edited with any ASCII editor. One is included. To edit the receiver frequency file, type TED RFREQS. When you have finished entering or changing the data, press the F7 key, then ENTER. To edit the transmitter list, just substitute TFREQS in the above.

To run the program, type IM OUT. This will place the results of the run in a file name OUT. You may substitute any valid file name in place of OUT for different runs.

Several example results are included. These files have names consisting of a single digit such as 1, 2, 3, etc.

The program is written and compiled with Borland Turbo Pascal 3.0


Here is a sample output from the program:

=========================================================
   Intermod Study       program (c) Aksala Electronics

  This is the list of frequencies for the study:

   52.5700   WL7AML-3          52.5700   WL7AML-3
  102.7000   KPEN             145.0100   WL7AML 3
  104.9000   KWVV             146.2800   KL7HIXin
  107.1000   MOODY            155.9100   POL IN  
  145.0100   WL7AML 3         155.9550   CITY    
  146.8800   KL7HIXot         156.0150   CITY    
  152.2400   KRI              158.2650   KEA IN  
  153.7250   KEA OUT          159.4950   SEALAND 
  155.0100   POL OUT          166.8250   RAS OUT 
  155.3100   HARB OUT         449.8500   AL7LQ IN
  155.9550   CITY             455.0500   KVOK IN 
  156.0150   CITY             456.5000   TUNI IN 
  156.1500   HARB OUT         466.0125   BREC REM
  159.4950   SEALAND          466.1125   -FUTURE-
  162.5500   WEATHER          466.5750   AKS#3 IN
  168.5000   RAS IN           469.1750   BUS IN  
  439.2500   ATV              469.2000   AKS#4IN 
  444.8500   AL7LQout         469.2250   BREC#1IN
  450.0500   KVOK OUT         469.2500   ANC     
  451.5000   TUNI OUT         469.2875   JOE'S   
  461.1125   FUTURE           469.4000   AKS#2IN 
  461.5750   AKS#3OUT         469.4500   BEN RX  
  464.1750   BUS OUT          469.8000   AKS#1 IN
  464.2000   AKS#4OUT         816.9625   AKS IN51
  464.2250   BRECHOUT         817.9625   AKS IN52
  464.2500   ANC              818.9625   AKS IN53
  464.4000   AKS#2OUT         818.9625   AKS IN54
  464.4500   BEN TX           818.9625   AKS IN55
  464.8000   AKS#1OUT
  861.9625   AKS 5-1 
  862.9625   AKS 5-2 
  863.9625   AKS 5-3 
  864.9625   AKS 5-4 
  865.9625   AKS 5-4 

  Transmitters  34          Receivers   28

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


===== Two Frequency, third-order tests:

  156.1500   156.0150     0.1350   155.8800   155.9100     0.030
  HARB OUT   CITY                             POL IN            

  159.4950   152.2400     7.2550   144.9850   145.0100     0.025
  SEALAND    KRI                              WL7AML 3          

  Loops:  31,248.

===== Two Frequency, fifth-order tests:

  Loops:  31,248.

===== Three Frequency, third-order tests:

  102.7000   104.9000   155.0100    52.5900    52.5700     0.020
  KPEN       KWVV       POL OUT               WL7AML-3

  104.9000   102.7000   155.0100    52.5900    52.5700     0.020
  KWVV       KPEN       POL OUT               WL7AML-3

  146.8800   155.3100   155.9550   146.2350   146.2800     0.045
  KL7HIXot   HARB OUT   CITY                  KL7HIXin

  146.8800   464.1750   464.8000   146.2550   146.2800     0.025
  KL7HIXot   BUS OUT    AKS#1OUT              KL7HIXin

  146.8800   464.2000   464.8000   146.2800   146.2800     0.000
  KL7HIXot   AKS#4OUT   AKS#1OUT              KL7HIXin

  146.8800   464.2250   464.8000   146.3050   146.2800     0.025
  KL7HIXot   BRECHOUT   AKS#1OUT              KL7HIXin

  152.2400   155.3100   162.5500   145.0000   145.0100     0.010
  KRI        HARB OUT   WEATHER               WL7AML 3

  152.2400   162.5500   168.5000   146.2900   146.2800     0.010
  KRI        WEATHER    RAS IN                KL7HIXin

  152.2400   162.5500   461.1125   146.3225   146.2800     0.043
  KRI        WEATHER    FUTURE                KL7HIXin

  155.3100   146.8800   155.9550   146.2350   146.2800     0.045
  HARB OUT   KL7HIXot   CITY                  KL7HIXin

  155.3100   152.2400   162.5500   145.0000   145.0100     0.010
  HARB OUT   KRI        WEATHER               WL7AML 3

  155.3100   159.4950   168.5000   146.3050   146.2800     0.025
  HARB OUT   SEALAND    RAS IN                KL7HIXin

  155.3100   159.4950   461.1125   146.3075   146.2800     0.028
  HARB OUT   SEALAND    FUTURE                KL7HIXin

  155.3100   162.5500   464.1750   146.3150   146.2800     0.035
  HARB OUT   WEATHER    BUS OUT               KL7HIXin

  155.9550   162.5500   464.8000   146.2950   146.2800     0.015
  CITY       WEATHER    AKS#1OUT              KL7HIXin

  155.9550   464.1750   464.2000   155.9300   155.9100     0.020
  CITY       BUS OUT    AKS#4OUT              POL IN  

  155.9550   464.1750   464.2250   155.9050   155.9100     0.005
  CITY       BUS OUT    BRECHOUT              POL IN  

  155.9550   464.1750   464.2500   155.8800   155.9100     0.030
  CITY       BUS OUT    ANC                   POL IN  

  155.9550   464.2000   464.2250   155.9300   155.9100     0.020
  CITY       AKS#4OUT   BRECHOUT              POL IN  

  155.9550   464.2000   464.2500   155.9050   155.9100     0.005
  CITY       AKS#4OUT   ANC                   POL IN  

  155.9550   464.2250   464.2500   155.9300   155.9100     0.020
  CITY       BRECHOUT   ANC                   POL IN  

  155.9550   464.4000   464.4500   155.9050   155.9100     0.005
  CITY       AKS#2OUT   BEN TX                POL IN  

  156.0150   162.5500   464.8000   146.2350   146.2800     0.045
  CITY       WEATHER    AKS#1OUT              KL7HIXin

  156.0150   464.1750   464.2500   155.9400   155.9100     0.030
  CITY       BUS OUT    ANC                   POL IN  

  156.0150   464.2500   464.4000   155.8650   155.9100     0.045
  CITY       ANC        AKS#2OUT              POL IN  

  156.1500   464.1750   464.4000   155.9250   155.9100     0.015
  HARB OUT   BUS OUT    AKS#2OUT              POL IN  

  156.1500   464.1750   464.4000   155.9250   155.9550     0.030
  HARB OUT   BUS OUT    AKS#2OUT              CITY    

  156.1500   464.1750   464.4500   155.8750   155.9100     0.035
  HARB OUT   BUS OUT    BEN TX                POL IN  

  156.1500   464.2000   464.4000   155.9500   155.9100     0.040
  HARB OUT   AKS#4OUT   AKS#2OUT              POL IN  

  156.1500   464.2000   464.4000   155.9500   155.9550     0.005
  HARB OUT   AKS#4OUT   AKS#2OUT              CITY    

  156.1500   464.2000   464.4500   155.9000   155.9100     0.010
  HARB OUT   AKS#4OUT   BEN TX                POL IN  

  156.1500   464.2250   464.4000   155.9750   155.9550     0.020
  HARB OUT   BRECHOUT   AKS#2OUT              CITY    

  156.1500   464.2250   464.4000   155.9750   156.0150     0.040
  HARB OUT   BRECHOUT   AKS#2OUT              CITY    

  156.1500   464.2250   464.4500   155.9250   155.9100     0.015
  HARB OUT   BRECHOUT   BEN TX                POL IN  

  156.1500   464.2250   464.4500   155.9250   155.9550     0.030
  HARB OUT   BRECHOUT   BEN TX                CITY    

  156.1500   464.2500   464.4000   156.0000   155.9550     0.045
  HARB OUT   ANC        AKS#2OUT              CITY    

  156.1500   464.2500   464.4000   156.0000   156.0150     0.015
  HARB OUT   ANC        AKS#2OUT              CITY    

  156.1500   464.2500   464.4500   155.9500   155.9100     0.040
  HARB OUT   ANC        BEN TX                POL IN  

  156.1500   464.2500   464.4500   155.9500   155.9550     0.005
  HARB OUT   ANC        BEN TX                CITY    

  159.4950   155.3100   168.5000   146.3050   146.2800     0.025
  SEALAND    HARB OUT   RAS IN                KL7HIXin

  159.4950   155.3100   461.1125   146.3075   146.2800     0.028
  SEALAND    HARB OUT   FUTURE                KL7HIXin

  162.5500   152.2400   168.5000   146.2900   146.2800     0.010
  WEATHER    KRI        RAS IN                KL7HIXin

  162.5500   152.2400   461.1125   146.3225   146.2800     0.043
  WEATHER    KRI        FUTURE                KL7HIXin

  162.5500   155.3100   464.1750   146.3150   146.2800     0.035
  WEATHER    HARB OUT   BUS OUT               KL7HIXin

  162.5500   155.9550   464.8000   146.2950   146.2800     0.015
  WEATHER    CITY       AKS#1OUT              KL7HIXin

  162.5500   156.0150   464.8000   146.2350   146.2800     0.045
  WEATHER    CITY       AKS#1OUT              KL7HIXin

  162.5500   444.8500   451.5000   155.9000   155.9100     0.010
  WEATHER    AL7LQout   TUNI OUT              POL IN  

  162.5500   444.8500   461.1125   146.2875   146.2800     0.008
  WEATHER    AL7LQout   FUTURE                KL7HIXin

  162.5500   461.1125   464.1750   159.4875   159.4950     0.008
  WEATHER    FUTURE     BUS OUT               SEALAND 

  162.5500   461.1125   464.2000   159.4625   159.4950     0.033
  WEATHER    FUTURE     AKS#4OUT              SEALAND 

  444.8500   162.5500   451.5000   155.9000   155.9100     0.010
  AL7LQout   WEATHER    TUNI OUT              POL IN  

  444.8500   162.5500   461.1125   146.2875   146.2800     0.008
  AL7LQout   WEATHER    FUTURE                KL7HIXin

  450.0500   464.1750   464.4000   449.8250   449.8500     0.025
  KVOK OUT   BUS OUT    AKS#2OUT              AL7LQ IN

  450.0500   464.2000   464.4000   449.8500   449.8500     0.000
  KVOK OUT   AKS#4OUT   AKS#2OUT              AL7LQ IN

  450.0500   464.2250   464.4000   449.8750   449.8500     0.025
  KVOK OUT   BRECHOUT   AKS#2OUT              AL7LQ IN

  450.0500   464.2250   464.4500   449.8250   449.8500     0.025
  KVOK OUT   BRECHOUT   BEN TX                AL7LQ IN

  450.0500   464.2500   464.4500   449.8500   449.8500     0.000
  KVOK OUT   ANC        BEN TX                AL7LQ IN

  450.0500   464.4500   861.9625    52.5375    52.5700     0.033
  KVOK OUT   BEN TX     AKS 5-1               WL7AML-3

  461.1125   162.5500   464.1750   159.4875   159.4950     0.008
  FUTURE     WEATHER    BUS OUT               SEALAND 

  461.1125   162.5500   464.2000   159.4625   159.4950     0.033
  FUTURE     WEATHER    AKS#4OUT              SEALAND 

  464.1750   146.8800   464.8000   146.2550   146.2800     0.025
  BUS OUT    KL7HIXot   AKS#1OUT              KL7HIXin

  464.1750   155.9550   464.2000   155.9300   155.9100     0.020
  BUS OUT    CITY       AKS#4OUT              POL IN  

  464.1750   155.9550   464.2250   155.9050   155.9100     0.005
  BUS OUT    CITY       BRECHOUT              POL IN  

  464.1750   155.9550   464.2500   155.8800   155.9100     0.030
  BUS OUT    CITY       ANC                   POL IN  

  464.1750   156.0150   464.2500   155.9400   155.9100     0.030
  BUS OUT    CITY       ANC                   POL IN  

  464.1750   156.1500   464.4000   155.9250   155.9100     0.015
  BUS OUT    HARB OUT   AKS#2OUT              POL IN  

  464.1750   156.1500   464.4000   155.9250   155.9550     0.030
  BUS OUT    HARB OUT   AKS#2OUT              CITY    

  464.1750   156.1500   464.4500   155.8750   155.9100     0.035
  BUS OUT    HARB OUT   BEN TX                POL IN  

  464.1750   450.0500   464.4000   449.8250   449.8500     0.025
  BUS OUT    KVOK OUT   AKS#2OUT              AL7LQ IN

  464.2000   146.8800   464.8000   146.2800   146.2800     0.000
  AKS#4OUT   KL7HIXot   AKS#1OUT              KL7HIXin

  464.2000   155.9550   464.2250   155.9300   155.9100     0.020
  AKS#4OUT   CITY       BRECHOUT              POL IN  

  464.2000   155.9550   464.2500   155.9050   155.9100     0.005
  AKS#4OUT   CITY       ANC                   POL IN  

  464.2000   156.1500   464.4000   155.9500   155.9100     0.040
  AKS#4OUT   HARB OUT   AKS#2OUT              POL IN  

  464.2000   156.1500   464.4000   155.9500   155.9550     0.005
  AKS#4OUT   HARB OUT   AKS#2OUT              CITY    

  464.2000   156.1500   464.4500   155.9000   155.9100     0.010
  AKS#4OUT   HARB OUT   BEN TX                POL IN  

  464.2000   450.0500   464.4000   449.8500   449.8500     0.000
  AKS#4OUT   KVOK OUT   AKS#2OUT              AL7LQ IN

  464.2250   146.8800   464.8000   146.3050   146.2800     0.025
  BRECHOUT   KL7HIXot   AKS#1OUT              KL7HIXin

  464.2250   155.9550   464.2500   155.9300   155.9100     0.020
  BRECHOUT   CITY       ANC                   POL IN  

  464.2250   156.1500   464.4000   155.9750   155.9550     0.020
  BRECHOUT   HARB OUT   AKS#2OUT              CITY    

  464.2250   156.1500   464.4000   155.9750   156.0150     0.040
  BRECHOUT   HARB OUT   AKS#2OUT              CITY    

  464.2250   156.1500   464.4500   155.9250   155.9100     0.015
  BRECHOUT   HARB OUT   BEN TX                POL IN  

  464.2250   156.1500   464.4500   155.9250   155.9550     0.030
  BRECHOUT   HARB OUT   BEN TX                CITY    

  464.2250   450.0500   464.4000   449.8750   449.8500     0.025
  BRECHOUT   KVOK OUT   AKS#2OUT              AL7LQ IN

  464.2250   450.0500   464.4500   449.8250   449.8500     0.025
  BRECHOUT   KVOK OUT   BEN TX                AL7LQ IN

  464.2500   156.0150   464.4000   155.8650   155.9100     0.045
  ANC        CITY       AKS#2OUT              POL IN  

  464.2500   156.1500   464.4000   156.0000   155.9550     0.045
  ANC        HARB OUT   AKS#2OUT              CITY    

  464.2500   156.1500   464.4000   156.0000   156.0150     0.015
  ANC        HARB OUT   AKS#2OUT              CITY    

  464.2500   156.1500   464.4500   155.9500   155.9100     0.040
  ANC        HARB OUT   BEN TX                POL IN  

  464.2500   156.1500   464.4500   155.9500   155.9550     0.005
  ANC        HARB OUT   BEN TX                CITY    

  464.2500   450.0500   464.4500   449.8500   449.8500     0.000
  ANC        KVOK OUT   BEN TX                AL7LQ IN

  464.4000   155.9550   464.4500   155.9050   155.9100     0.005
  AKS#2OUT   CITY       BEN TX                POL IN  

  464.4500   450.0500   861.9625    52.5375    52.5700     0.033
  BEN TX     KVOK OUT   AKS 5-1               WL7AML-3


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Joe Stevens, WL7AML, Aksala Electronics, Inc. 907-486-4700
1417B Mill Bay Road, Kodiak, AK 99615


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