hello...

my old but trusty hp141t (1.2ghz) appears to have developed a fault/out of
calibration??

it all works but now there is a spurious reading (peak) about 6.5mhz down
from the fundamental peak..about 55db down..its always there when a signal
is present (but not of course when no input.)
It's defiantly the analyser as I have tried different tx sources and its
always present..
sniffing rf via bird 43 attenuator..

Any ideas??

simon g0zen