GX2472 - Dual Channel Digitizer PXI Card

Dual Channel Digitizer

Dual Channel, Differential, 14-bit 70MS/S Digitizer
  • Two Channel, 14 Bit Digitizer
  • Differential Or Single Ended Inputs
  • Dc To >50 MHz Analog Bandwidth
  • 1V To 20 Vpp Full Scale
  • Ac Or Dc Coupling
  • Excellent Dynamic Range And Low Distortion
  • 3U PXI Instrument
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The GX2472 is a high performance, dual differential channel, 14-bit digitizer offering high dynamic range and excellent SFDR. The module’s differential inputs, coupled with its low distortion makes it an ideal instrument for analyzing high performance or low level analog signals. Each channel offers 3 selectable low pass filters, a 14 bit, 70 MS/s ADC, and 512K of memory. A 50 MHz or 70 MHz clock with a divider provides a common acquisition clock source for both channels.


The GX2472 provides two, differential inputs offering the ability to make low level measurements in the presence of common mode or noisy signals. The inputs can also be configured for single-ended operation. The input impedance is selectable for 10 K ohm or 50 ohm. The 50 ohm configuration supports AC or DC coupling. Each channel can also add an offset to the input signal, providing the ability to maximize the A to D’s dynamic range.

Both channels offer three, 3-pole, low pass, butterworth filters providing the ability to band limit signal noise and minimize aliasing effects. The filters can also be bypassed to take advantage of the input amplifier’s full bandwidth.

Clocking of the digitizer is provided by a 10 MHz, 50 MHz or 70 MHz clock which can be divided by 1 to 256. Each channel can be independently triggered to start a measurement from an external or internal source.

Programming and Software

The board is supplied with a 32-bit DLL driver. Various interface files provide access to the DLL from programming tools and languages such as ATEasy, LabVIEW, C/C++, Microsoft Visual Basic®, Delphi, and more. The available virtual panel can be used to interactively adjust and control the instrument from a window that displays the instrument’s current settings and measurements.
An On-Line help file and PDF User’s Guide provides documentation that includes instructions for installing, using and programming the board.


  • Automotive testing
  • High performance baseband testing
  • Medical device and module test
  • ATE systems



GX2472 Dual Channel, Differential, 14-bit 70MS/S Digitizer
GX92104 SMB plug to BNC-M cable, 36 inches (RG188 cable)




Input Channels 4 analog (A+, A-, B+, B-)
1 external clock, 1 external trigger
Input Connectors SMB
A/D Converter
Resolution 14 bits
Sampling Rate 500 KS/s to 70 MS/s
Clock Source External or Internal
Internal Clock 70 MS/s, or 50 MS/s, 100 ppm
Clock Divider 1 to 256
Memory 512K samples per channel
Analog Input Channels
Input Configuration Differential or single-ended
Input Range 1 Vpp, 2 Vpp, 4 Vpp
With input attenuator: 5 Vpp, 10 Vpp, 20 Vpp
Dc Offset +/- 5 volts, 16 bit resolution
+/- 25 volts, with attenuator
Input Impedance 10 Kohm,
50 ohms (AC or DC coupling)
Resolution 1 Hz
Accuracy +/- (500 uV + .1% of range)
With attenuator on:
+/- (2.5 mV + .2% of range)
Relative Accuracy +/- 0.025% of range
Bandwidth 70 MHz (- 3dB)
Low Pas Filters 3-pole Butterworth, selectable:
None, 6 MHz, 15 MHz, 30 MHz
Chanel Crosstalk < 80 dB at 1 MHz
SFDR 80 dB, 1 MHz input
72 dB, 10 MHz input
(50 MS/s, 2 Vpp signal)
SINAD 68 dB, 1 MHz input
64 dB, 10 MHz input
(50 MS/s, 2 Vpp signal)
Connector Front panel SMB
Impedance 10K ohm nominal
Threshold Level TTL
Sources Front panel, PXI trigger 0 -5, PXI Star
trigger, software trigger, input signal
Modes Positive / negative level or edge,
positive / negative edge continuous
External Clock
Connector Front panel SMB
Input Impedance 50 ohm nominal
Maximum Frequency 100 MHz
Threshold Level TTL
Output Impedance 50 ohms
Output Level V Lo: <0.5 volts, V HI > 4.5 volts, no load
Current Consumption (Max) +5 V @ 650 mA
+12 V @ 40 mA
-12 V @ 40 mA
+3.3 V @ 300 mA
Weight Approx. 210 grams
Size 3U, single slot
Temperature Operating 0° C to 50° C
Storage 0° C to 70° C
10% to 80%
Safety EN61010-1:2001
CE Labeled Yes
EN61000-6-1:2001, EN55011:1998


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