Quote:
Originally Posted by Andrew2
On FM the story is similar. Poor gain, noises off and generally irritatingly bad. Again no filtering hardware and I couldn't find a LO signal.
|
With other similar radios on FM (having 'low-IF'), the Local Oscillator is approximately just 0.125kHz either above or below the received frequency.
So for example tuned to a station on 100.0 MHz, the LO is likely on approx either 100.125 or 99.875 MHz
Very little leaks out, but a narrowband receiver, such as a scanner in NFM mode, will likely receive the LO carrier holding it close to the radio (I found on a similar radio - the Tesco RAD108, the 4th harmonic of the LO could be detectable over a significantly greater distance).