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NI PXI-5621 SPECIFICATIONS
High-Speed Digitizer
The NI PXI-5621 is a DC-coupled 64 MS/s 14-bit high-speed digitizer.
Except for its DC coupling, the PXI-5621 is functionally identical to the
PXI-5620. Refer to the NI PXI-562x User Manual for instructions on
installing and using your NI PXI-5621.
The NI PXI-5621 specifications are warranted at 0–50 °C ambient unless
otherwise specified, and include a 10 minute warm-up time from ambient
conditions.
General Specifications
Number of channels
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DC offset.................................................±1 mV (calibrated) Analog bandwidth (–3 dB range) ...........0 Hz to 36 MHz Amplitude accuracy................................±0.5 dB VSWR 0–25 MHz........................................<1.5:1 25–32 MHz......................................<3:1 Dither (can be disabled) Frequency range ..............................150 Hz to 4 MHz Frequency Internal sample clock 16 Frequency ........................................64 MHz/n, where 1 < n <
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Amplitude Typical Results –70.00 –80.00 –90.00 –100.00 –110.00 –120.00 –130.00 –140.00 0.0 5.0M 10.0M 15.0M 20.0M 25.0M 32.0M Frequency (Hz) Figure 1. Noise Density (Dither Disabled, Input Terminated) Average noise density (dither off).............................................. <–129 dBm/Hz Signal-to-noise ratio 9 dBm signal, full bandwidth.......... >62 dB Harmonic distortion (single tone, 0 dBm signal; includes aliased harmonic distortion) 4–15 MHz, dither enabled .............. <–77 dBm
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Typical Results 0.00 –10.00 –20.00 –30.00 –40.00 –50.00 –60.00 –70.00 –80.00 –90.00 –100.00 –110.00 30.5M 30.6M 30.7M 30.8M 30.9M 31.0M 31.1M 31.2M 31.3M 31.4M 31.5M Frequency (Hz) Figure 2. Intermodulation Distortion Intermodulation distortion (2-tone, 0 dBm signals, 200 kHz separation) 4–15 MHz, dither enabled ...............<–86 dBm 0–32 MHz, dither disabled ..............<–78 dBm Residual responses (input terminated)....<–75 dBm NI PXI-5621 Specifications 4 ni.com Amplitude (dBm)
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Typical Results 0.20 0.10 0.00 –0.10 –0.20 –0.30 –0.40 –0.50 –0.60 –0.70 –0.80 0.0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0 27.5 30.0 32.0 Frequency (MHz) Figure 3. Frequency Response (0.1–32 MHz) Frequency response (4–25 MHz) Relative (to response at 15 MHz) ... <±0.25 dB Absolute .......................................... <±0.6 dB Absolute (using calibration table)... <±0.5 dB © National Instruments Corporation 5 NI PXI-5621 Specifications Amplitude (dB)
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Phase Typical Results 20.00E–9 18.00E–9 16.00E–9 14.00E–9 12.00E–9 10.00E–9 8.00E–9 6.00E–9 4.00E–9 2.00E–9 0.00E+0 –2.00E–9 0.0E+0 5.0E+6 10.0E+6 15.0E+6 20.0E+6 25.0E+6 32.0E+6 Frequency (Hz) Figure 4. Group Delay versus Frequency Group delay variation (5–25 MHz) ............................................9 ns pk–pk Group delay variation (0.5–30 MHz) .........................................26 ns pk–pk DDC Decimation rate.......................................32–4,096 DDC tuning resolution..
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Triggering Modes..................................................... Immediate, software, digital Sources ................................................... PFI 1, PXI<0..7>, PXI STAR Export..................................................... PFI 1, PXI<0..7> Slope....................................................... Rising, falling Pretrigger depth...................................... Up to 32 MS Posttrigger depth .................................... Up to 32 MS Minimum pulse width ......
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Environmental Specifications Warm-up time.........................................10 minutes Operating environment Ambient temperature.......................0–50 °C Humidity..........................................10–90%, noncondensing Storage environment Storage temperature.........................–20 to 70 °C Humidity..........................................5–95%, noncondensing Maximum altitude...................................2,000 meters Pollution Degree ..................................
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Electromagnetic Compatibility CE, C-Tick, and FCC Part 15 (Class A) compliant Electrical emissions................................ EN 55011 Class A at 10 m FCC Part 15A above 1 GHz Electrical immunity................................ Evaluated to EN 61326:1997/A1:1998, Table 1 Note For full EMC compliance, you must operate this device with shielded cabling. In addition, all covers and filler panels must be installed. See the Declaration of Conformity (DoC) for this product for any additional
