Another key tool is the AM notch filter, which is often necessary to eliminate errors when measuring harmonics with a spectrum analyzer. Frequently, internal non-linearities create artificially high harmonic or spurious indications when the fundamental carrier is unsuppressed. By "notching" the primary frequency, reliable accuracy is ensured.
Our low-loss port on the am notch filter allows measurement forays well below -80 dBc at +- 75 kHz, which are required when conducting NRSC tests on stations with power levels of 5 kw and above. See Breaking the 80 dB barrier. For FM harmonic measurements, we offer a 175 MHz hi-pass filter to attenuate the FM band while passing harmonics.
Our low-loss port on the am notch filter allows measurement forays well below -80 dBc at +- 75 kHz, which are required when conducting NRSC tests on stations with power levels of 5 kw and above. See Breaking the 80 dB barrier. For FM harmonic measurements, we offer a 175 MHz hi-pass filter to attenuate the FM band while passing harmonics.
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