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Ham Radio CD-ROM (Emerald Software) (1995).ISO
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1991-11-12
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EME2 - Simple EME Link Budget Calculator
I've found that the old EME.BAS eme link budget calculator found on some
of the ham-related BBS's either doesn't work right or I haven't been able to
figure out how to use it. In this program, I've simply computerized the link
budget calculation method outlined in the 1991 ARRL Handbook. This program
requires input for eight of the nine following variables:
Transmit Station Power (watts)
Transmit Feedline Loss (db)
Transmit Antenna Gain (dbi)
Path Loss (251.5 db to 253.5 db)
Receive Antenna Gain (dbi)
Receive Feedline Loss (db)
Receiver Noise Figure (db)
Receiver Bandwidth (Hz)
Signal to Noise Ratio (db)
Plug in known values for eight of the variables, -1 for the unknown variable
and the program calculates the actual value of the unknown. Please - only
one unknown per run! Try this program for estimating the effect of changes
on your EME system. If you can achieve 0 db Signal to Noise Ratio, by all
means have at it!! I've managed to work KB8RQ with 150 watts to a 15.0 dbi
3.0 wavelength yagi and a 0.5 db noise figure receiver. I make no guarantees
as to the accuracy of results given by this program, but believe it to be
reasonably useful for estimating EME capabilities. I you want the source code
(Basic), contact me at:
Dave Metzler (N3AJX)
3020 Curdes Ave.
Fort Wayne, IN 46805
Have fun!!