Variable Transition Pulse Waveforms; Slew-Limited Transitions; Band-Limited Pulses - Metrix GX1010 Notice De Fonctionnement

Set TGEN to 1·00ms again (1kHz) and the burst count to 2; this will give the waveform
shown. The pulse width and interval between successive pulses is determined by the main
generator frequency and symmetry; the pulse width will be PER x SYM and the pulse low
time will be PER x (1-SYM). The repetition rate of the bursts remains determined by the
TGEN period.
6.4.

Variable Transition Pulse Waveforms

The half cycle triggered burst capability can be used to produce square waves with a
variety of different edge shapes. Three examples are shown, one with straight slew-limited
transitions and two with sinusoidal transitions where different start-stop phase settings give
quite different effects.

6.4.1. Slew-limited transitions

The edge of slew rate limited pulses are straight lines, produced by half cycles of the main
generator triangle wave. The interval between the edges is again defined by the trigger
generator.
Set the main generator to 10kHz, 10Vpp, by pressing FREQ, 1, 0, kHz, and EMF, 1, 0, V;
change the symmetry to 60:40 by pressing SYM, 6, 0, %; DC OFFSET, 0, V; select
TRIANGLE.
Select the Trigger menu by pressing EDIT, TRIG, and set SOURCE=TGEN, i.e. internal
trigger generator. Set the TGEN period to 1ms (1.000kHz), the BURST COUNT to 000·5
and the PHASE to -90°. If it is off, set Trigger mode on by pressing TRIG again.
The waveform should be that shown in the diagram. The rise and fall times can be reduced
by increasing the main generator frequency and the relationship between rise and fall time
can be altered by changing the symmetry.

6.4.2. Band-limited Pulses

The edges of band limited pulses are sinewave segments, starting from -90°. Normally the
rise and fall times will be equal, so the main generator symmetry is set to 50%. Following
on from the example above:
GX1010
Set SYM, 5, 0, %
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