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778724-03 Datasheet(PDF) 4 Page - National Instruments Corporation |
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778724-03 Datasheet(HTML) 4 Page - National Instruments Corporation |
4 / 6 page 100 and 50 MHz, Programmable-Voltage Digital Waveform Generator/Analyzers 4 BUY ONLINE at ni.com or CALL (866) 265 9891 (U.S.) Generation Signal Characteristics (data, DDC Clk Out, and PFI <0..3> channels) Data channel-to-channel skew.............................................. ±300 ps (typical across all data channels) ±900 ps (maximum across all data channels) Maximum data channel toggle rate ...................................... NI 6551: 25 MHz; NI 6552: 50 MHz Data formats .......................................................................... NRZ Data position modes.............................................................. Rising edge, falling edge, delayed relative to sample clock Generation data delay range................................................. 0 to 1 sample clock period for clock frequencies ≥25 MHz Generation data delay resolution.......................................... 1/256 of sample clock period for clock frequencies ≥25 MHz Acquisition Signal Characteristics (data, strobe, and PFI <0..3> channels) Channel-to-channel skew ...................................................... ±400 ps (typical across all data channels) ±900 ps (maximum across all data channels) Minimum detectable pulse width ......................................... 4 ns (required at both acquisition voltage thresholds) Acquisition timing delay range.............................................. 0 to 1 sample clock periods for clock frequencies ≥25 MHz Acquisition timing delay resolution....................................... 1/256 of sample clock period for clock frequencies ≥25 MHz Waveform Characteristics Triggers (inputs to the NI 655x) Trigger types .......................................................................... Start Trigger, Pause Trigger, Script Trigger <0..3> (generation sessions only) Reference Trigger (acquisition sessions only) Multirecord Advance Trigger (acquisition sessions only) Sources .................................................................................. 1. PFI <0> (SMB jack connector) 2. PFI <1..3> (DDC connector) 3. PXI_TRIG<0..7> (PXI backplane, PXI only), RTSI <0..7> (PCI only) 4. PXI_STAR (PXI backplane, PXI only) 5. Pattern match (acquisition sessions only) 6. Software (user function call) 7. Disabled (do not wait for a trigger) Trigger detection.................................................................... 1. Start Trigger (edge detection: rising or falling) 2. Pause Trigger (level detection: high or low) 3. Script Trigger <0..3> (edge detection: rising or falling, Level detection: high or low) 4. Reference Triggers (edge detection: rising or falling) 5. Advance Trigger (edge detection) Minimum required trigger pulse width ................................. 30 ns Destinations ........................................................................... 1. PFI 0 (SMB jack connector) 2. PFI <1..3> (DDC connector) 3. PXI_TRIG <0..7> (PXI backplane, PXI only), RTSI <0..7> (PCI only) Each of the triggers can be routed to any of the 13 destinations except the pause trigger cannot be exported. Memory and Scripting Onboard memory size (assumes no scripting instructions) 1 Mb/channel (for generation sessions) 8 Mb/channel (for generation sessions) 64 Mb/channel (for generation sessions) 1 Mb/channel (for acquisition sessions) 8 Mb/channel (for acquisition sessions) 64 Mb/channel (for acquisition sessions) Generation Modes Waveform: Generate a single waveform once, N times, or continuously. Scripted: Generate a simple or complex sequence of waveforms. Use scripts to describe the waveforms to be generated, the order in which the waveforms are generated, how many times the waveforms are generated, and how the device responds to script triggers. |
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