----- Original Message -----
Sent: Sunday, October 19, 2003 3:32
PM
Subject: LF: Re: 136 khz LF
hamilton mal wrote:
Using speclab this is what was indicated.
Nothing calibrated. Relative measurement signal above noise floor 55
db.
I expect to be really meaningful the system
needs to be calibrated. Next time I will try the calibrated LEVEL
METER
The signal was very strong, likwise M0BMU is
also very strong. Large dog bones across the screen !!!!!!
Whatever sound card program you use, the indicated level is that of
the audio signal reaching
the sound card, and as such is totally dependent
from many factors unrelated to the real
field strength of the radio
signal. If you change the volume setting of the radio, or the slider
level
in the Windows mixer, what is indicated will change.
That dB (not dBm)
indication is meant just for relative measurements.
Quite right Alberto. I have said this already
about speclab and similar progs.
73 Alberto
I2PHD
