Barracuda RV8 Manual

Summary of RV8

  • Page 1

    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 ...

  • Page 2: Variable Sample Frequency

    4-14 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...

  • Page 3: Status Lights

    System 3 4-15 rv8 barracuda status lights the status lights indicate the state of the rv8. Armed, running, (docount), and freerun. Combinations of the status light describe the state of the rv8. Digital input lights lights are on when there is a ttl pulse on the digital input line. Pulse times may b...

  • Page 4: Bandwidth And Timing

    4-16 system 3 rv8 barracuda bandwidth and timing standard sample rates are in powers of two from 6 khz to 400 khz. The actual sample rate is given in the box to the right. Arbitrary sample rate can be from 10 hz to 500,000 hz. In the arbitrary sample rate box type a number between 10 hz and 500,000 ...

  • Page 5: Docount

    System 3 4-17 rv8 barracuda the special modes are set with a bit-masked pattern. For example, to set the trigger mode using a ztrga the value for the special mode would be set to 1 + 16 or “17”. To use the mtrig function the value would be 1 (docount) + 16 (useztrga) + 128 (mtrig) or “145”. Docount ...

  • Page 6: Sample Count Options

    4-18 system 3 rv8 barracuda 2. Determine the number of samples that the circuit runs. The barracuda can play out over 4 gsamples (4*109 samples) on one trigger. Sample counter (low 16) sets the sample number between 0 and 65535 sample counter (high 16) sets it between 65536 and a large number. For e...

  • Page 7: Trigger Mode

    System 3 4-19 rv8 barracuda trigger mode the first circuit requires three additional components: lingate gates the output on and off, schmitt opens and closes the gate and src (soft1) starts the schmitt trigger. The second circuit requires that the barracuda be controlled from the trigger mode. Trig...

  • Page 8

    4-20 system 3 rv8 barracuda sample period in seconds that you require and then divide by 1/(sample period). These circuits work only with the barracuda. If the circuit is run on a different rp module it will give the following error: rp control object files (rco) will produce similar problems. If yo...

  • Page 9: Activex

    System 3 4-21 rv8 barracuda activex the barracuda uses two additional activex methods setdevcfg and getdevcfg. Detailed information about them is included in the activex help. Barracuda technical specifications dsp 50 mhz sharc 21065, 150 mflops memory 32mb sdram digital inputs 16 bits + 1 trig inpu...

  • Page 10: Db25 Connector Pin Out

    4-22 system 3 rv8 barracuda db25 connector pin out option i/o db9 connector pin out pin name description pin name description 1 do0 digital output channels 14 do1 digital output channels 2 do2 15 do3 3 do4 16 do5 4 do6 17 do7 5 gnd ground 18 di0 digital input channels 6 di1 digital input channels 19...