Set the output frequency of Signal Generator A to 300 MHz; set the amplitude to -10 dBm.
Set the output frequency of Signal Generator B to 300.2 MHz; set the amplitude to -10 dBm.
3. Connect the output terminal of Signal Generator A to the power divider via a 300 MHz low-pass
filter.
4. Connect the output terminal of Signal Generator B with the power divider. Connect the power
divider with the power sensor, as shown in Figure 2-6 (a).
5. Press Channel on the power meter and set the frequency of Channel A to 300 MHz. Enable the
output of Signal Generator A and disable the output of Signal Generator B. Observe the
measurement value of the power meter. Adjust the output amplitude of Signal Generator A until
the measurement value of the power meter becomes -10 dBm.
6. Press Channel on the power meter and set the frequency of Channel A to 300.2 MHz. Disable
the output of Signal Generator A and enable the output of Signal Generator B. Observe the
measurement value of the power meter. Adjust the output amplitude of Signal Generator B until
the measurement value of the power meter becomes -10 dBm.
7. Enable the outputs of the two signal generators. Disconnect the power divider and power sensor;
connect the power divider and spectrum analyzer, as shown in Figure Figure 2-6 (b).
8. Configure the spectrum analyzer:
a) Set the center frequency to 300 MHz.
b) Set the span to 1 kHz.
c) Set the CF step to 200 kHz.
d) Set the maximum mixer level to -20 dBm.
e) Set the input attenuation to 0 dB; and set the reference level to -8 dBm.
f) Set the resolution bandwidth to 30 Hz, and set the video bandwidth to 3 Hz.
g) Set the peak excursion to 3 dB.
9. Press Single and wait for the instrument to finish a sweep. Then press Peak to find the
maximum peak. Set the marker mode to Delta and reduce the center frequency by 200 kHz.
Press Single and wait for the instrument to finish a sweep. Then press Peak and record the
delta result.
10. Use the formula below to calculate the TOI distortion. TOI Distortion = -20 dBm - Delta/2.
Compare the calculation result with the specification.
11. Exchange the output frequencies of the two signal generators. Set the center frequency of the
spectrum analyzer to 300.4 MHz. Press Single and wait for the instrument to finish a sweep.
Then press Peak and record the delta result.
12. Use the formula below to calculate the TOI distortion. TOI Distortion = -20 dBm - Delta/2.
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