I've got the manual for the probe on my site. Go to
http://titan.sfasu.edu/~g_brennantg/psblp.man
Sometimes people have trouble with windoze machines not wanting to read that
file because it doesn't recognize the extension. Its just a plain text file.
You could download it and just rename it to a .txt file.
Tom
Tom Brennan KD5VIJ, CCC-A/SLP
web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html