4-13
RV8 Barracuda
RV8
Barracuda
Note:
This device is no longer available for new purchase.
RV8
Overview
The Barracuda features include nanosecond accurate event-timing, fast DAC's for
high frequency stimulus presentation and user control of sample frequencies. In
addition the Barracuda gives users precise control over stimulus presentation. The
system has 16-digital inputs, 8-digital outputs, and 8 analog outputs.
Power
and
Communication
The RA16 mounts in a System 3 zBus Powered Device Chassis (ZB1PS) and
communicates with the PC using any of the zBus PC interfaces. The ZB1PS is UL
compliant, see the
ZB1PS Operations Manual
for power and safety information.
Software
Control
Software control is implemented with circuit files developed using TDT's RP Visual
Design Studio (RPvdsEx). Circuits are loaded to the processor through TDT run-
time applications or custom applications. This manual includes device specific
information needed during circuit design. For circuit design techniques and a complete
reference of the RPvdsEx circuit components, see the
RPvdsEx Manual
.
Nanosecond
Event
‐
Timing
The Barracuda is a nanosecond accurate event timer. The TimeStamp component
uses the high-speed clock on the system to record when a TTL event occurred
during a sampling period. This means that event times are independent of sample
rate. When an event occurs the TimeStamp sends out the time in microseconds from
the start of that sample period. At the end of each sample period the event timer is
reset to zero. In the figure below three events occurred during a sample period of
