User Manual

4) Use channel output

5) Press CH1 button start channel 1 output quickly. Or enable output by pressing Utility

and then CH1 Setting . After channel output is opened, backlight of CH1 button is on,

and on the right side of channel information label, the font “OFF” changes to “DSBAM”,

meaning open channel output.

Figure 4- 11 Use channel output

Waveform displayed on the oscilloscope

l)Quadrature Amplitude Modulation(QAM)

In QAM, two signals of the same frequency but with phase difference of 90° (normally

indicated by Sin or Cos) are used as carrier wave, which is subject to amplitude modulation

with baseband signal. UTG2000B function/arbitrary waveform generator can output seven

modulation modes: 4QAM, 8QAM, 16QAM, 32QAM, 64QAM, 128QAM and 256QAM. The

modulation mode of the two channels is mutually independent. You can configure same or

different modulation mode for channel 1 and 2.

Note: to prevent phase deviation, it is suggested to use 10MHz as reference output signal

and reference clock input for demodulation devices.