User Manual

Figure 4- 1 Select carrier waveform

Set carrier frequency

See Carrier Frequency Wave Setting

Select modulation source

UTG2000B function/arbitrary waveform generator can select internal or external modulation

source. After you use PSK function, you can see that modulation source is internal by default.

You can change it with multi-functional knob on the interface for using PSK function or by

pressing Param → Source

1)Internal source

In case of internal modulation source, internal modulation wave is sine wave. The phase

relation between oscillation start and stop can be designated by setting OSK rate.

2)External source

In case of external modulation source, rate will be hidden in parameter list, when an external

waveform will be used to modulate carrier waveform. OSK output phase is determined by

logic level on external digital modulation interface (FSK Trig connector). For example, when

external input logic is low, carrier phase is output; when external input logic is high,

modulation phase is output.

Set vibrate time

Press the soft key and enter the period value. Range: 8ns~200ns, default is 1ms.

Set OSK rate

The frequency between carrier phase and modulation phase can be set in case of internal

modulation source. After you use OSK function, you can set QPSK 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 PSK function or by pressing Rate.

Comprehensive example

First make the instrument run in OSK mode, and then set an internal sine wave of 2kHz

and 2Vpp as carrier signal. Set rate to be 100Hz and oscillation period to be 1μs. The

specific steps are as follows:

1)OSK function

Press Mod → Type → OSK successively (press soft key Type to select if Type is not

highlighted) to use OSK function.