[hfsig] Problem with operation

Jerry Davis jdawgaz at gmail.com
Wed Mar 29 09:42:26 CDT 2017


I've had mine going continuously for a little over 2 months.

I am K7AZJ, and my QTH is Phoenix. I have gotten as far away as Eastern
Russia, and Hawaii. Mostly US, and Canada.

Running with a dedicated Rpi 2 and 20m vertical.

For those who profess to be Noobies. Let me explain a little bit about
linux:
Linux is by design a multiuser operating system. When you boot up, you are
actually running as the user "pi".

The reason you have to put sudo in front of the command is that the user pi
does not have the privileges it needs to run. By putting sudo in front, you
"become" root (which is the all powerful user, on unix and linux systems),
and then you can run programs that accesses more privileged resources.

The reason you must be in the directory to run it, is because you told it
so on the command line. The . before the filename wspr, is a shortcut which
means "current directory" so
./wspr:  means run from the current directory (where ever you may be).

You could easily run it from anywhere as long as the path was right. So if
you had the wspr executable in a directory named bin in your home directory
then
"sudo /home/pi/bin/wspr" would be just as good. I moved my executable to my
bin directory and run it that way, myself.

Also according to the README file in the directory where you downloaded and
built wspr, I have added several 0's at the end of the command to only
transmit every 30 minutes (14 0's I think). I feel that every 2 minutes is
too frequently for me.

so, after the sudo ./wspr ... 20 20m, mine looks like this:

sudo ./wspr ... 20 20m 0 0 0 0 0 0 0 0 0 0 0 0 0 0

this means that when the next 2 minutes rolls around if it is zero it won't
transmit.
once it exhausts all the 0 bands (which make it not transmit), it will then
recycle again, and then the 20m causes it to be transmitted again.


Anyway, I hope my explanation is helpful to some who are new to linux.

Jerry




--
Extra Ham Operator: K7AZJ
Registered Linux User: 275424
Raspberry Pi and Openscad developer


*The most exciting phrase to hear in science - the one that heralds new
discoveries - is not "Eureka!" but "That's funny...".*- Isaac. Asimov
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