212 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide
RF Assembly
A3 RF Assembly Troubleshooting
6. Set the power level to 0 dBm by pressing AMPTD, 0 dBm.
7. Turn amplitude modulation on by pressing AM, AM On.
8. Set the AM Source to EXT 1 by pressing AM Source, EXT 1.
9. Set the depth of modulation to 50% by pressing AM Depth, 50%.
10.At this point there should be a flat line on the display of the spectrum
analyzer at about 200 mV.
11.Setup the function generator with the following settings:
— Function = Sinewave
— Frequency = 1 kHz
— Amplitude = 1 Vpp
— Offset = 0 V
12.Connect the function generator output to the rear panel EXT 1 connector.
13.The signal on the spectrum analyzer display should now be a 1 kHz
sinewave signal, as shown in Figure 10-6.
Figure 10-6 Amplitude Modulation Triggered By EXT 1
14.Change the AM source to EXT 2 by pressing AM Source, EXT 2.
15.The signal on the spectrum analyzer should now be a flat line again.
16.Move the function generator output from the rear panel EXT 1 input to
EXT 2.
17.The signal on the spectrum analyzer should again be a 1 kHz sinewave
signal, as shown in Figure 10-6.
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