UNI-T UTG2122B, Руководство пользователя

Страница: 85 / 130

UTG2000B Series 83
number, you can set as PN7,PN9,PN11,PN15,PN17,21,PN23,PN25 Set QAM rate
After you use QAM function, you can set QAM rate, which is in the range of 2mHz~1MHz and 100Hz
by default. You can change it with multi-functional knob and direction key on the interface for using
ASK function or by pressing Param
→
Rate
Comprehensive example
First make the instrument run in QAM mode, and then set an internal sine wave of 2kHz and 2Vpp
as carrier signal. Set rate to be 100Hz and modulation mode to be 64QAM, default source is PN7.
The specific steps are as follows:
1)
QAM function
Press Mod
→
Type
→
QAM successively (press soft key Type to select if Type is not
highlighted) to use QAM function.
Figure 3 -14 Select QAM function
2) Set carrier signal parameters
Press the key of basic waveform type setting Sine to select carrier signal as sine wave. The default
carrier signal is sine wave, so it is unnecessary to change in this example. You can set by pressing
Carrier
→
Type
→
Sine . You can also press corresponding soft keys of function again, when the
interface below will pop up.
To set some parameter, press corresponding soft key, input the required value and select the unit.