3156B User Manual
Racal Instrument © 2005
WaveCAD 4-9
TIP
The 3156B requires two conditions to start generating
waveforms: 1) Output State is ON and 2) Operate Enable is
ON. The Output State button activates a mechanical relay
that connects/disconnects the output terminal to the
output circuit. The Operate Enable ON command
stimulates the 3156B to generate signals.
Enable
The enable group affects the 3156B only when the operate enable
source is set to software (software is the default enable source). If the
output state is on, clicking on the operate Enable button will stimulate
the output. In some cases, the disable can stop the output. The
various options to enable and disable the output waveforms, using the
enable commands are given in Table 3-2.
The Standard
Waveforms Panel
The Standard Waveforms panel, as shown in Figure 4-4, is accessible
after you click on the STD button in the Panels bar. The functional
groups in the Standard Waveforms Panel are described below.
Waveforms (Channel 1 and 2)
The Waveforms group provides access to a library of built-in standard
waveforms. The library includes: Sine, Triangle, Square, Pulse Ramp,
Sinc, Exponential, Gaussian and DC waveforms. Each waveform has
one or more parameters that can be adjusted for the required
characteristics of the output. For example, phase start can be adjusted
for the sine and triangle waveforms and duty-cycle can be adjusted for
the square waveform. The pulse waveform can be adjusted for rise
and fall time as well as width and delay. Parameters that are
associated with each waveform are automatically displayed when the
waveform is selected.
When the Half Cycle button is depressed, the Sine, Triangle and
Square waveforms produce half cycles each time an enable command
is received. In continuous run mode, the time lapse between two half-
cycles is adjustable using the re-trigger delay parameter.
Note that by clicking a button in this group, you are immediately
updating the 3156B output with this waveform shape.
