Maker Pro
Maker Pro

Source of 150kHz spur?

D

Dummy

Jan 1, 1970
0
When I was testing the transmit power of a radio,
a spur with Fc-150kHz was observed in spectrum analyzer. It appears
across the frequency band 403MHz to 470MHz while transmitting.
Spurs amplitude was about -70dBm, might be significant enough to cause
interference to adjacent channel frequencies.
Could the 150kHz be the harmonics of clock freq or something else...
 
M

Mac

Jan 1, 1970
0
When I was testing the transmit power of a radio,
a spur with Fc-150kHz was observed in spectrum analyzer. It appears
across the frequency band 403MHz to 470MHz while transmitting.
Spurs amplitude was about -70dBm, might be significant enough to cause
interference to adjacent channel frequencies.
Could the 150kHz be the harmonics of clock freq or something else...


Switching power supply?

--Mac
 
L

Lawrence Oravetz

Jan 1, 1970
0
Mac brought next idea :
Switching power supply?

--Mac

might be a harmonic of the Lo in the radio... Could be a wireless
microphone too.
 
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