GX2065 - New Product6½ Digit DMM / Digitizer PXI Card

6½ Digit DMM / Digitizer

Performance 6½ Digit DMM / Digitizer
  • Flexible, full-featured auto-ranging DMM
  • DC and AC volts and current, 2-wire and 4-wire Ω
  • 3 MHz digitizing (DAQ) function
  • AC RMS measurements, 3 Hz to 300 kHz
  • Measure 1 µV to 300 V
  • Self-calibrating
  • Up to 3,500 rps
  • 1 Hz to 500 kHz frequency measurement
  • 300 VDC or VAC rms isolation barrier (CAT II)
  • Extended temperature range option
  • Supplied with a full featured API and UI as well as SMX2040 & SMX2060 compatible drivers
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The GX2065 offers a unique combination of features, resolution, accuracy and speed in a compact, single slot 3U PXI format. Featuring 6-½ digit resolution, 0.005% basic DCV reading accuracy and up to 3,500 reading per second (rps) assures you of measurements that are accurate, fast and repeatable. All measurement functions including digitizing functions are isolated from the PXI bus – providing the ability to make true differential, floating measurements. An on-board controller performs all necessary DMM and digitizer calculations, minimizing PXI control bus overhead.


  • Automated production testing
  • Laboratory automation
  • Portable/field test
  • Semiconductor and component test


The GX2065 is designed as a universal, multifunction DMM and provides all of the features associated with standard bench top DMMs including VDC, VAC, 2 and 4 – wire resistance measurements, and current measurements. Additionally, the GX2065 features a 3 MHz, 16 bit, isolated input digitizer which allows users to acquire and analyze waveforms. Built in analysis and waveform functions include RMS, average, peak to peak, and peak to average measurements. Up to 8192 samples can be stored in the digitizer’s memory. Frequency and period measurements to 500 kHz are also supported. An external TTL trigger via the PXI bus or front panel is available for triggering DMM measurements.


The GX2065 is supplied with the GXDMM software package which includes a virtual instrument panel, a Windows 32/64-bit DLL driver libraries and documentation. The virtual panel can be used to interactively program and control the instrument from a window that displays the instrument’s current settings and status. In addition, interface files are provided to support access to programming tools and languages such as ATEasy, LabView, LabView/Real-Time, C/C++, Microsoft Visual Basic®, Delphi, and Pascal. An On-Line help file and PDF User’s Guide provides documentation that includes instructions for installing, using and programming the board. SMX2040 & SMX2060 compatible drivers are also supplied, allowing customers to easily upgrade existing applications to the GX2065.
A separate software package – GtLinux – provides support for Linux 32/64 operating systems.



GX2065 Performance 6½ Digit DMM / Digitizer
GX93005 DIN Mating Connector for GTX22xx
GX93006 3′ Harness for GTX22xx DIN connector (DIN to Header)



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Inputs Hi, Lo, Hi Sense, Lo Sense; floating and isolated from ground
External trigger
Input Connectors (4) Banana, 7-pin DIN
Format PXI, 3U single slot, hybrid slot compatible
DMM and Digitizer Measurement System Features
Resolution 22 bits (DMM),
16 bits (digitizer / DAQ)
DMM Sampling Rate
(VDC, IDC & R Measurements)
Selectable PLC rate, 0.01 to 10;
PLC can be set to 50 or 60 Hz
DMM Reading Rate (VDC, IDC & 2WR (< 10 MΩ)) 50 readings/sec @ 6.5 digits, 60 Hz, (1 PLC)
500 readings/sec @ 5.5 digits, 60 Hz, (0.1 PLC)
2500 readings/sec @ 4.5 digits, 60 Hz, (0.01 PLC)
3500 readings/sec @ 3.5 digits, 60 Hz, (0.002 PLC)
Digitizer (DAQ) Clock Rate Programmable to 3 MHz
Range: (3 MS/s) / N, N=1 to 216
Accuracy: 100 ppm
DAQ Measurement Functions AC / DC voltage and current measurements, frequency
Digitizer Memory 8192 samples
DMM Memory 1 K samples
DMM Measurement Characteristics
Input Range 100 nV to 300 V
VAC Input Range 3 µV to 425 V (peak), 300 VRMS 10 Hz to 100 kHz, AC coupled
Crest Factor (VAC) No limitation as long as maximum input signal is below the maximum range value.
VDC / VAC Input Impedance > 10 GΩ (0.1, 1, and 0 VDC ranges)
400 pF shunt capacitance
10 MΩ for other AC / DC ranges,
400 pF shunt capacitance
Maximum Input (Volt – Hertz) 8 x 10e7 V x Hz Common Mode Input
8 x 10e7 V x Hz (across Hi or Lo input relative to earth ground)
Input Isolation CATII 300 V
Input Overvoltage Protection 250 V for current input,
300 V CATII for all other inputs
Noise Rejection VDC: 90 dB, NMRR; 140 dB CMRR 15 readings/sec, 1 PLC, 6.5 digit, 10 V range
IDC Input Range 10 nA to 2 A
IAC Input Range 3 µA to 2 A RMS, AC coupled
10 Hz to 5 kHz
Crest Factor (AC Current) No limitation as long as maximum input signal is below the maximum range value
AC / DC Input Current Protection 2 A, 250 V, fast blow, sand filled, 1.5 kA breaking
Resistance Range 0.1 mΩ to 100 MΩ
Resistance Measurement Configuration Selectable, 2-wire or 4-wire
Burden Voltage (Maximum) Current Range
20 mA
100 mA
1 A
2 A
< 0.2 V
< 0.1 V
< 0.5 V
< 1.0 V
Trigger Source Function: Start measurement
Source: PXIbus, software, continuous, external input (DIN connector), timer
Trigger Output Modes Functions: Start of measurement, end of measurement
Trigger can be routed to the PXIbus or the DIN connector
Trigger Input Voltage Range 3.3 V CMOS, 5 V Tolerant
Minimum Trigger Input Pulse Width 50 ns for PXI bus, 250 µs for external DIN input
Trigger Input Impedance 4.75 kΩ
Trigger Input Edge Selectable, positive or negative
AC Measurement Performance
Digits Reading Rate Signal Bandwidth
0.25 S/s 1 Hz to 300 kHz
2.5 S/s 10 Hz to 300 kHz
25 S/s 100 Hz to 300 kHz
100 S/s 400 Hz to 300 kHz
1 K S/s 20 kHz to 300 kHz
Power Requirements
+12 VDC 25 mA (max)
-12 VDC 16 mA (max)
+3.3 VDC 255 mA (max)
+5 VDC 2.3 A (max)
Environmental and Physical Specifications
Safety Complies with IEC 61010-1, CAT II
300 V, pollution degree 2
EMC Complies with EN61326-1
Calibration Calibration is performed at the factory using NIST traceable instrumentation.
All calibration constants are stored on-board in non-volatile EEROM.
Calibration can be performed by any calibration laboratory with the appropriate equipment.
Temperature Range Operating: 0 °C to +50 °C
Extended operating range: -20 °C to +70 °C
Storage: -20 °C to +70 °C storage
Relative Humidity Operating: 80% at 40 °C
Storage: 95% at 40 °C
Connectors (4) Banana jacks:
Hi: Voltage, 2 W Ω
Lo: Voltage, Current, 2 W Ω
Sense Hi: Current, 4 W Ω
Sense Lo: 4 W Ω
7-pin DIN: Trigger in, Trigger out, Trigger Gnd


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