UNI-T UTG2122B, Руководство пользователя

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82 UTG2000B Series
reference clock input for demodulation devices.
Select QAM
Press Menu
→
Mod
→
Type
→
QAM successively to use QAM function (if Type is not
highlighted, press soft key Type to select). After QAM function is used, UTG2000B
function/arbitrary waveform generator will output modulated waveform with the current carrier
phase and modulation phase.
Figure 3 -14 Select QAM function
Set carrier signal parameters
QAM carrier waveform is sine wave.
Figure 3 - 13 Select carrier waveform
Set carrier frequency
See Carrier wave frequency setting Set modulation mode
Modulation mode is subsection of constellation, which varies with the modulation mode selected.
Press soft key IQ map to highlight it, and input the required period value through numeric keyboard
or direction key and knob, which can be 4QAM, 8QAM, 16QAM, 32QAM, 64QAM, 128QAM or
256QAM.
Select modulation frequency
After enabling the QAM, the default source is PN7. Press Param
→
Source and input the source