Table of Contents
Advertisement
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.
Waveform displayed on the oscilloscope
3.1.12 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
UTG2000B Series
Figure 3 - 11 Use channel output
81
Advertisement
Table of Contents
