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Fig. 4-13 Attenuator Setting - 10dB
The amplitude reading of the differential marker is provided by two sources: 1. If the RF attenuation is increase, S/N
will decrease, and this reading will be positive. 2. If the harmonic distortion of the spectrum analyzer decreases, this
reading will be negative. The larger the reading, the bigger the error of measurement. In such case, the attenuator
setting may be changed to reduce absolute amplitude of such delta marker reading.
2) Quick harmonic measurement
In this section, harmonic components are measured of a signal with frequency of 1 GHz and power of -10 dBm
generated by the signal generator.
a) Set the output signal of the signal generator.
Set the frequency of the signal generator as 1GHz and power as -10dBm. Connect the output of the signal
generator to the input port of the spectrum analyzer, as shown in Fig. 4-1. Enable the ON state of the radio
frequency.
b) Set the starting frequency and stop frequency of the spectrum analyzer.
Press [Reset] key.
Press [frequency], [Start Freq], 800[MHz], [Stop Freq] and 2.5[GHz].
As shown in Fig. 4-14, the fundamental wave and second harmonic will be displayed on the screen.