UNI-T UTG9000T Series, User Manual, Page: 80 / 162

UTG9000T Series Function Abitrary Waveform Generator
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QPSK bitrate settings
In QPSK modulation mode, it can set the shift frequency between in the carrier phase and the
modulating phase. The QPSK bitrate range cam set to 1
μ bps~2Mbps, the default range is 100bps.
Rotate multifunction knob, push direction key or tap Bitrate tab to pop-out visual numeric keyboard
to enter values and select unit in modulation setting interface.
Phase settings
1) Phase1 is the carrier wave phase, the default value is 0°.
2) Phase2, 3, 4 is the modulating phase, it means the phase changes between the
QPSK-modulated wave and the carrier wave phase. The QPSK modulating phase range can set
to 0º~360º. Rotate multifunction knob, push direction key or tap Phase1 , Phase2 ,Phase3 tab to
pop-out visual numeric keyboard to enter values and select unit in modulation setting interface.
Comperhensive example
In QPSK modulation mode, set an internal 2kHz, 2Vpp sine wave as a carrier wave, set the phase of the
three fundamental waves and the initial modulation phases be 90 °, 180 ° and 270 ° respectively, hopping
frequency 1kbps among the phases, select PN code as PN 15, the setting steps as following,
1) Turn on QPSK modulation mode: tap CH1 → Modulate → QPSK accordingly.