5.Panel Operation
(3) Set carrier wave parameters:
Press the wave shape key of the selected carrier wave to display the
waveform and parameters of the carrier wave. You can change the
parameters of the carrier wave. Press the corresponding carrier waveform
key to return to the modulation mode interface or press the Mode key to
return to the modulation selection mode.
(4) Set BPSK rate:
Press the Rate softkey to set the BPSK rate. The rate at which the output
phase shifts between the carrier phase and the modulating phase is
determined by BPSK rate (for internal source). The range is 2 mHz –
1 MHz.
(5) Set BPSK phase deviation:
Press the Deviation softkey to set the modulating phase deviation.
Select modulating wave source:
BPSK uses internal modulation source. Press the DataSource softkey to
select PN15, PN21, 01 Patt, or 10 Patt as the modulating wave source.
QPSK (Quadrature Phase Shift Keying)
Quadrature Phase Shift Keying modulation is a modulation technique that
shifts the output signal phase among four preset phases: the carrier phase
and three modulating phases. The shift frequency (QPSK rate) is determined
by the internal signal level of the instrument. The QPSK user interface is
shown below.
Mod
Type
Load
Parameter 1
Parameter 2
Modulating wave
Carrier wave
Parameter 3
Parameter 4
Figure 5-25: QPSK user interface
How to set the parameters of QPSK
(1) Press the Mode function key,press the NextPage softkey three more
times,then press the QPSK softkey to enter QPSK user interface.
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