User Manual

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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.
5.10 Frequency Sweep
You must enable sweep before setting up any of the other sweep parameters. Press 【Sweep】 key
then output a sweep using the present settings for frequency, output amplitude, and offset.
5.10.1 Set Sweep Signal
Firstly, set up the waveform shape, amplitude and offset of sweep signal. In the frequency sweep
mode, the waveform generator moves from the start frequency to the stop frequency at a sweep rate
which you specify. It can span with the whole frequency range and the phase of output signal is
continuous. The waveform generator can produce a frequency sweep for most waveforms mentioned
above, but some waveforms are not available.
Frequency linear sweep is similar to frequency modulation with ramp, the difference is that frequency
sweep don’t use the modulating waveform, continuously output series of discrete frequency point
based on the sweep time.
5.10.2 Start Frequency and Stop Frequency
After enabling sweeps, press the 〖 Start Freq 〗 or 〖Stop Freq〗 softkey. Then use the knob or
numeric keypad to enter the desired frequency. To sweep up in frequency, set the start frequency
less than the stop frequency. To sweep down in frequency, set the start frequency
be greater than the stop frequency.