Below is a link leading to the signal meter readings shown on my new
Tecsun PL-310 when receiving the AM broadcast signals of three
different stations with known values of field intensity at the point
of measurement.

For a check on FM broadcast field measurement I took the radio out in
the middle of the street in front of my house, and with its whip
antenna fully extended and in the vertical plane it read about 60 dBu
(1 mV/m, if a field intensity) on a local station that uses a c-pol
transmit antenna. It read about the same with the whip horizontal.
The whip antenna was about 5 feet above the ground.

The expected field intensity from that station for the radiated power,
transmit antenna height, path length and receive antenna height is
about 12 mV/m, or 81.6 dBµV/m.

So based on the results above, my PL-310 does not provide even a
roughly accurate measure of the MW/VHF field intensity that the radio
is receiving (unfortunately).

I could not check the accuracy of the PL-310 metering on SW, because
there is no way of accurately knowing the incident field from remote
SW/HF transmit stations arriving at my receiving location.

http://i62.photobucket.com/albums/h8...l_Readings.gif

RF ( http://rfry.org )

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