National Instruments NI PXI-5621 Bedienungsanleitung

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October 2002

323398B-01

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 ............................... 1

Resolution .............................................. 14 bits

Sample rate range................................... 1 kS/s to 64 MS/s

Onboard memory

Not using DDC ............................... 32 MS

Using DDC (complex data) ............ 16 MS

Input

Signal level

Nominal .......................................... 0 dBm (±0.316 Vp)

Full-scale......................................... +10 dBm (±1.000 Vp)

Max with dither enabled ................. +8 dBm (±0.794 Vp)

Non-operating

Max input level........................ +20 dBm (±3.16 Vp)

Max DC input voltage ............. ±3.0 V

Input impedance..................................... 50 Ω nominal

Coupling................................................. DC

ni.com

NI PXI-5621 Specifications 2 ni.com

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

Frequency ........................................64 MHz/n, where 1 < n< 216

Accuracy..........................................<±25 ppm

Phase noise

Residual FM ...........................................<2 Hzpk–pk in 10 ms

Offset Density

100 Hz <–100 dBc/Hz

1 kHz <–120 dBc/Hz

10 kHz <–130 dBc/Hz

100 kHz <–130 dBc/Hz

©National Instruments Corporation 3 NI PXI-5621 Specifications

Amplitude

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

0–32 MHz, dither disabled.............. <–71 dBm

–80.00

–90.00

–100.00

–120.00

–130.00

–140.00

0.0 5.0M 20.0M 25.0M 32.0M

Frequency (Hz)

Typical Results

Amplitude (dBm)

15.0M10.0M

–110.00

–70.00

NI PXI-5621 Specifications 4 ni.com

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

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 31.1M 31.3M 31.5M

Frequency (Hz)

Amplitude (dBm)

30.9M30.8M 31.0M 31.2M 31.4M

Typical Results

©National Instruments Corporation 5 NI PXI-5621 Specifications

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

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

Amplitude (dB)

Frequency (MHz)

Typical Results

NI PXI-5621 Specifications 6 ni.com

Phase

Figure 4. Group Delay versus Frequency

Group delay variation

(5–25 MHz) ............................................9 nspk–pk

Group delay variation

(0.5–30 MHz) .........................................26 nspk–pk

DDC

Decimation rate.......................................32–4,096

DDC tuning resolution............................0.014901 Hz

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 20.0E+6 25.0E+6 32.0E+6

Frequency (Hz)

Group Delay (ns)

15.0E+6

Typical Results

©National Instruments Corporation 7 NI PXI-5621 Specifications

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 ............................ 100 ns

External Trigger (PFI 1)

PFI 1 connector ...................................... SMB male

Trigger level........................................... TTL

Max input voltage .................................. 5.5 V

External Frequency Reference Input

Connector (REF CLK IN)...................... SMA female

Impedance .............................................. 50 Ω nominal

Input amplitude ...................................... –5 to +15 dBm

Max non-operating input level............... +20 dBm

Max DC input voltage............................ ±3.5 VDC

Frequency range..................................... 10 MHz ±40 ppm

Crosstalk from reference input............... <–85 dB

Calibration

Calibration interval ................................ 1 year

NI PXI-5621 Specifications 8 ni.com

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 .....................................2

Indoor use only

Power Requirements

+3.3 VDC (±5%) ....................................<650 mA

+5 VDC (±5%) .......................................<1.5 A

+12 VDC (±5%) .....................................<650 mA

–12 VDC (±5%)......................................<75 mA

Maximum Working Voltage

Channel-to-earth .....................................2.23 V operating,

3.0 V nonoperating;

Installation Category I

Safety

Meets the requirements of the following standards for safety for electrical

equipment for measurement, control, and laboratory use:

EN 61010-1:1993/A2:1995, IEC 61010-1:1990/A2:1995,

UL 3101-1:1993, UL 3111-1:1994, UL 3121:1998,

CAN/CSA C22.2 no. 1010.1:1992/A2:1997 d.

©National Instruments Corporation 9 NI PXI-5621 Specifications

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 regulatory compliance information. To obtain the

DoC for this product, click Declaration of Conformity at ni.com/hardref.nsf. This

Web site lists the DoCs by product family. Select the appropriate product family, followed

by your product, and a link to the DoC (in Adobe Acrobat format) appears. Click the

Acrobat icon to download or read the DoC.

Dimensions

PXI-5621 (1 PXI slot) ............................ 10 by 16 by 2.0 cm

(3.9by6.3by0.8in.)

Certifications and Compliances

CE Mark Compliance

Conductive Immunity

When tested as specified in EN 61000-4-6 at 3 Vrms, the spurious response

is within specifications except at the test frequency. A spurious signal of up

to –45 dBm may appear at the test frequency.

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