Page: 8/21 User Manual PULS-CTRL24, Rev.1-00: Description
Each pulse generator is a combination of two coupled non-
retriggerables monoflops. The first one with a pulse width defined by
one of the numbers Delay0-23 is triggered by the input signal Trigger.
When its delay finishes, the second monoflop with a pulse width de-
fined by one of the numbers Width0-23 is launched and the output of
the particular module is activated. The minimum delays of the mon-
oflops are 3 clock pulses, i.e. 60 ns.
The pulse controller controls 32 outputs (see Fig. 2). These output
signals can control 6 signal switches, 5 I/O modules with 4 outputs
each, or 6 monitor outputs at the controller front panel. Each output
can be configured in a similar way like the trigger inputs of the pulse
generators. The output may be permanently set to 0 or 1, connected
to the output of the oscillator (signal Osc), to the external trigger
source (signals Trig0-4) or to the pulse generator (signals Del0-23).
The polarity of the output signal can be inverted by the control signal
Inv0-31.
The configuration of the pulse controller is controlled by software. The
current configuration is stored in a non-volatile memory and is auto-
matically restored when the device is started. The user can define and
save up to 500 configurations in the non-volatile memory, they can be
easily applied by a software command. Beside its number, each con-
figuration can be labeled by a unique name or description text. Using
the stored configurations, the pulse controller can be rapidly reconfig-
ured for a new application or a different measurement procedure.
The controller also provides control signals for auxiliary power sup-
plies of the signal switches. The function of these signals cannot be
configured. The user can just decide whether the control signals are
modulated using a dithering technique to reduce the spectral noise
amplitude at the switch outputs.
The pulse controller is equipped with a USB data interface that allows
to transfer configuration data to or from the device and remotely con-
trol it. The USB data interface is galvanically connected to the device
case. When making a connection to a host computer, a large ground
loop is created that can influence the performance of the experimental
setup.
CGC Instruments
Tel.: +49 (371) 355 098–55
Hübschmannstr. 18 | D–09112 Chemnitz
Fax: +49 (371) 355 098–60
internet: www.cgc-instruments.com
e–mail: [email protected]
