PeakTech 4105 Bedienungsanleitung Seite 108

5.9 Bi – Phase Shift Keying Modulation (BPSK)
Press 【Modulate】 key then select the BPSK using the 〖Mod Type〗 softkey. The BPSKSK waveform
is output using the present settings.
5.9.1 Set Carrier
Firstly, set the shape, frequency, amplitude and offset of Carrier Waveform. In BPSK, the phase of
output signal alternately hop between carrier phase and hop phase, and hop rate depends on BPSK
rate. You can select one of most waveforms from above table to be carrier, but some waveforms are
not available.
5.9.2 Hop Phase
Press 〖Hop Phase〗softkey then enter the desired value using the knob or keypad. The BPSK
modulation is similar to PM with modulation waveform of Square. And hop phase is similar to phase
deviation.
5.9.3 BPSK Rate
To set the BPSK rate, press the BPSK Rate softkey. Then use the knob or numeric keypad to enter
the desired rate.
5.9.4 Modulating Waveform Shape
In BPSK，the internal modulating waveform is fixed to a square wave with a 50% duty cycle.
5.9.5 BPSK Source
When the Internal source is selected, the rate is determined by the BPSK rate specified.
When the External source is selected, the output frequency is determined by the signal level on the
rear-panel Trig In connector. When a logic low level is present, the carrier frequency is output. When
a logic high level is present, the hop frequency is output.
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