HBM PX401, Operating Manual

Page: 265 / 552

Test signals and signal generators
PMX
A4354-2.2 HBM: public
265
14 Test signals and signal generators
Test signals
Different types of signals can be generated and transmit­
ted with the PMX. This can be a test signal during the
starting-up phase, to simulate measured values and thus
already test the functioning of the components. During
activation of a test signal, this is displayed in the PMX
browser and also transmitted on the fieldbus as a status.
Signal generators
The PMX has internal signal generators that can be set
up using the calculated channel "Signal generators". The
following functions are available in the function paramet­
ers:
sine, rectangle, white noise, counter, constant and
triangle
Other parameters include:
frequency, amplitude and offset
The signal generator can also be activated with an on-
switch, with repetitions being defined by specifying the
periods.
As well as conventional waveforms, the PMX also has
the option to define a separate function by specifying up
to 21 points. These points are interconnected along a
line. The test profile can be controlled by a ramp (timer).
First the ramp for controlling the timing of the signal is
generated.
To do this, create a new calculated channel "Timer" un­
der the "Technology" category. The period and the ramp
interval can be specified in its function parameters, as
well as switching between continuous and single shot
mode.