TFG2900A Series Function/Arbitrary Waveform Generator Users’ Guide
Suin Instruments Co., Ltd
45
modify pulse’s parameters with the sequence of second pulse width, interval time and first pulse
width.
3.12.5 Pulse State
: Press
〖
State
〗
to choose ‘Positive pulse’ ‘Negative pulse’ and ‘Plus-Negative
pulse’ alternatively. Positive pulse’s pulse width is positive value, pulse interval is 0 value.
Negative pulse’s pulse width is negative value, pulse interval is 0 value. Plus-Negative pulse’s
pulse width is positive value, pulse interval is negative value. When positive pulse or negative
pulse is output, output signal’s amplitude is half of the setting value.
3.12.6 Trigger source
: Press
〖
Source
〗
to choose trigger source. If internal is chosen, instrument
will use internal trigger source to continuously output double pulse signal. In this condition,
double pulse frequency and period setting is effective. If external is chosen, instrument will use
external trigger source and double pulse frequency and period setting will be ignored. Input
external signal from rear panel’s
《
Trig In/Out
》
port. But external trigger signal’s period should
conform to the following rules.
Trigger signal’s period>(first pulse width+ interval time + second pulse width+5ns)
3.12.9 Sync output
: Sync signal’s period is equal to double pulse’s period, sync signal’s width is
equal to first pulse’s width. If external or manual trigger is selected, sync signal will be decided by
external trigger or manual trigger signal.
3.13 Harmonic Synthesis
According to Fourier transform, any periodic function can decompose into several sine waves with
different frequencies, amplitudes and phases. In contrast, we can also use several sine waves with
different frequencies, amplitudes and phases to compose a predicted periodic arbitrary waveform.
Using this method, we can accurately simulate all kinds of arbitrary waveforms in our real life,
and supply perfect signal testing source to the testing instrument.
3.13.1 Function selection
: Press
【
Harmonic
】
to enter harmonic synthesis function and display
harmonics list and operation menu.
