Barracuda RV8 Manual - Variable Sample Frequency
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System 3
RV8 Barracuda
ten microseconds. For each digital input a unique time stamp is recorded for that
sample period.
TimeStamp Diagram
Fast Digital‐Analog Converters
The Barracuda ships with PCM DAC's with up to 500 kHz sample rate. The fast
DAC's can be used for high frequency presentations. In addition the Barracuda's PCM
DAC's give users precise control over voltage outputs for microelectrode stimulation.
Variable Sample Frequency
The Barracuda allows users to set the sample period in 40 nanosecond steps. Users
can select sample frequency from 10 to 500,000 Hz.
User Control of System Devices
The Barracuda has two control modes: Free-run and Triggered. In Free-run mode
the circuit runs continuously and gating functions are required to control the signal
outputs and inputs. In Trigger mode the circuit only runs after it has been triggered.
It then runs for a set number of samples and then stops. The system can be
triggered once or multiple times. The circuit must be reset before it can trigger
again. Gating functions are not required for turning on and off stimuli.
Additional Features
To simplify signal synchronization it is possible to send out the sample clock and the
system clock (50 MHz) on the digital outputs. Users can also send out the sample
clock period.
Barracuda Features
Trigger
Takes an external TTL pulse and triggers components (free run mode) or triggers
the circuit (trigger mode).