I'm running a Flex 3000 radio with PowerSDR 2.5.3.
When tuning across the 160M band (in any mode) the received noise floor
toggles between a normal (lower) level and an erroneous (higher) level.
Steps as small as 1 Hz can toggle the noise floor. The erroneous level is
approximately 6 dB higher than normal and is accompanied by spurious AM
broadcast signals that can reach up to 20 dB above the noise floor. The
problem is also evident when the antenna is disconnected but the AM signals
are no longer present. It seems to be somewhat worse towards the bottom end
of the 160M band.
I am also noticing a similar effect on the 10M and 6M bands (and to a lesser
extent on the 15M and 12M bands) where the noise floor jumps between tuning
steps but on these bands it does not seem to remain toggled.
Has anyone else noticed and resolved this problem? If so then any advice on
how to resolve it would be appreciated.
Thanks and 73, Brian VK3MI ZL1AZE
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