UNI-T UTG9504T User Manual page 77

UTG9000T Series Function Abitrary Waveform Generator
The PN code settings
UTG9000T function/arbitrary waveform generator can select the internal source. Turn on QPSK modulation mode,
the default PN code is PN3. Rotate multifunction knob or tap PN Code→PN3 to select different PN code.
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 1μbps~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,
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