Test Equipment Depot XFTP SAT LITE, Operation Manual

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XFTP SAT LITE Satellite Meter - Operation Manual
QPSK Modulation
The Quadrature Phase Shift Keying (QPSK) is a digital modulation
scheme that conveys data by changing, or modulating, the phase of a
reference signal (the carrier wave). The frequency that is used is
8 Mbps / 8 MHz.
To change the QPSK modulation type, use the or Direction
Buttons to highlight the
QPSK Field, then press the Direction
Button or
ENTER
Button to choose from Nor , Inv , or Auto .
Use the Nor setting for Ku band satellites in most cases, Inv setting
for C band satellites in most cases, or Auto setting for the automatic
mode. When in the automatic mode the instrument will automatically
select the correct modulation type for the signal.