NI PXIe-4137 User manual

SPECIFICATIONS
PXIe-4137
PXIe, ±200 V, ±1 A (DC)/±3 A (Pulsed), 100 fA Precision System PXI
Source Measure Unit
These specifications apply to the PXIe-4137.
Note In this document, the PXIe-4137 (40W) and PXIe-4137 (20W) are referred to
inclusively as the PXIe-4137. The information in this document applies to all
versions of the PXIe-4137 unless otherwise specified. To determine which version of
the module you have, locate the device name in one of the following places:
•In MAX—The PXIe-4137 (40W) shows NI PXIe-4137 (40W), and the
PXIe-4137 (20W) shows as NI PXIe-4137.
•Device front panel—The PXIe-4137 (40W) shows PXIe-4137 40W System
SMU, and the PXIe-4137 (20W) shows NI PXIe-4137 Precision System SMU
on the front panel.
Contents
Definitions.................................................................................................................................2
Conditions................................................................................................................................. 2
Cleaning Statement................................................................................................................... 3
Device Capabilities................................................................................................................... 3
Voltage.......................................................................................................................................7
Current...................................................................................................................................... 8
Noise......................................................................................................................................... 8
Sinking Power vs. Ambient Temperature Derating................................................................ 10
Output Resistance Programming Accuracy............................................................................ 12
Overvoltage Protection........................................................................................................... 12
Pulsed Operation..................................................................................................................... 13
Extended Range Pulsing for PXIe-4137 (40W)..............................................................13
Extended Range Pulsing for PXIe-4137 (20W)..............................................................18
Transient Response and Settling Time....................................................................................18
Load Regulation......................................................................................................................20
Measurement and Update Timing Characteristics.................................................................. 20
Remote Sense..........................................................................................................................22
Safety Interlock....................................................................................................................... 22
Examples of Calculating Accuracy Specifications................................................................. 23
Examples of Determining Extended Range Pulse Parameters and Optimizing Slew
Rate using NI SourceAdapt ............................................................................................. 25
Trigger Characteristics............................................................................................................ 32

Protection ............................................................................................................................... 32
Safety Voltages........................................................................................................................33
Current Ratings....................................................................................................................... 33
Guard Output Characteristics..................................................................................................33
Calibration Interval................................................................................................................. 33
Power Requirement.................................................................................................................33
Physical................................................................................................................................... 34
Environmental Characteristics................................................................................................ 34
Environmental Standards........................................................................................................ 34
Safety Compliance Standards................................................................................................. 35
EMC Standards....................................................................................................................... 35
Environmental Management................................................................................................... 35
Waste Electrical and Electronic Equipment (WEEE)..................................................... 36
电子信息产品污染控制管理办法（中国 RoHS）......................................................36
Product Certifications and Declarations................................................................................. 36
NI Services..............................................................................................................................36
Definitions
Warranted specifications describe the performance of a model under stated operating
conditions and are covered by the model warranty.
Characteristics describe values that are relevant to the use of the model under stated operating
conditions but are not covered by the model warranty.
•Typical specifications describe the performance met by a majority of models.
•Nominal specifications describe an attribute that is based on design, conformance testing,
or supplemental testing.
•Measured specifications describe the measured performance of a representative model.
Specifications are Warranted unless otherwise noted.
Conditions
Specifications are valid under the following conditions unless otherwise noted.
• Ambient temperature1 of 23 °C ± 5 ºC
• Chassis with slot cooling capacity ≥38 W2
– For chassis with slot cooling capacity = 38 W, fan speed set to HIGH
• Calibration interval of 1 year
• 30 minutes warm-up time
1The ambient temperature of a PXI system is defined as the temperature at the chassis fan inlet (air
intake).
2For increased capability, NI recommends installing the PXIe-4137 (40W) in a chassis with slot
cooling capacity ≥58 W.
2| ni.com | PXIe-4137 Specifications

• Self-calibration performed within the last 24 hours
•NI-DCPower Aperture Time is set to 2 power-line cycles (PLC)
Cleaning Statement
Notice Clean the hardware with a soft, nonmetallic brush. Make sure that the
hardware is completely dry and free from contaminants before returning it to
service.
Device Capabilities
The following table and figure illustrate the voltage and the current source and sink ranges of
the PXIe-4137.
Table 1. Current Source and Sink Ranges
DC voltage ranges DC current source and sink ranges
600 mV
6 V
20 V
200 V3
1 μA
10 μA
100 μA
1 mA
10 mA
100 mA
1 A
3 A4
3Voltage levels and limits >|40 VDC| require the safety interlock input to be closed.
4Current is limited to 1 A DC. Higher levels are pulsing only.
PXIe-4137 Specifications | © National Instruments Corporation | 3

Figure 1. Quadrant Diagram for PXIe-4137 (40W)
0.5
3.0
2.5
2.0
1.5
1.0
3.5
–3.5
–1.0
–1.5
–2.0
–2.5
–3.0
–0.5
–120–140–160
–200 –180 –100 –80 –60 –40 –20 200
60
8040 100 120 140 160 180 200
0.0
–200 V, –0.2 A
–200 V, 0.2 A
200 V, –0.2 A
200 V, 0.2 A
–40 W 40 W
40 W –40 W
Pulse or DC, up to 40 W
Pulse only, up to 480 W
–40 V, 1 A
–40 V, –1 A
40 V, 1 A
40 V, –1 A
Voltage (V)
Current (A)
–160 V, –3 A
160 V, 3 A
160 V, –3 A
–160 V, 3 A
Quadrant IQuadrant II
Quadrant IVQuadrant III
For additional information related to the Pulse Voltage or Pulse Current settings of the Output
Function, for the PXIe-4137 (40W), including pulse on time and duty cycle limits for a
particular operating point, refer to Pulsed Operation on page 13. For supplementary
examples, refer to Examples of Determining Extended Range Pulse Parameters and
Optimizing Slew Rate using NI SourceAdapt on page 25.
4| ni.com | PXIe-4137 Specifications

Figure 2. Quadrant Diagram for PXIe-4137 (20W)
0.5
3.0
2.5
2.0
1.5
1.0
3.5
–3.5
–1.0
–1.5
–2.0
–2.5
–3.0
–0.5
–120–140–160
–200 –180 –100 –80 –60 –40 –20 200
60
8040 100 120 140 160 180 200
0.0
–200 V, 60 mA
–200 V, –100 mA
–160 V, –1.25 A
200 V, 100 mA
160 V, –1.25 A
66.6 V, –3 A
–66.6 V, –3 A
–20 V, –1 A 12 V, –1 A
–200 W
–12 V, 1 A
–12 W 20 W
200 W
20 W
200 W
–12 W
–200 W
Pulse or DC
Pulse only, maximum pulse on time 1ms, maximum duty cycle 5%
Pulse only, maximum pulse on time 400 µs, maximum duty cycle 2%
–66.6 V, 3 A 160 V, 3 A
160 V, –3 A
66.6 V, 3 A
–160 V, 3 A
–160 V, –3 A
–160 V, 1.25 A
20 V, 1 A
Voltage (V)
Current (A)
160 V, 1.25 A
200 V, –60 mA
Quadrant I
Quadrant II
Quadrant IV
Quadrant III
DC sourcing power and sinking power are limited to the values in the following table,
regardless of output voltage. 5
Table 2. DC Sourcing & Sinking Power
Model Variant Chassis Type DC Sourcing Power DC Sinking Power
PXIe-4137 (40W) ≥58 W Slot Cooling Capacity 40 W 40 W
<58 W Slot Cooling Capacity 20 W 12 W
PXIe-4137 (20W) ≥58 W Slot Cooling Capacity 20 W 12 W
<58 W Slot Cooling Capacity 20 W 12 W
5Power limit defined by voltage measured between HI and LO terminals.
PXIe-4137 Specifications | © National Instruments Corporation | 5

Caution Limit DC power sinking to 12 W where applicable as indicated in the
above table. For <58 W cooling slots,
• Additional derating applies to sinking power when operating at an ambient
temperature of >45 °C.
• If the PXI Express chassis has multiple fan speed settings, set the fans to the
highest setting.
Related Information
Sinking Power vs. Ambient Temperature Derating on page 10
Extended Range Pulsing for PXIe-4137 (40W)(1) on page 13
Extended Range Pulsing for PXIe-4137 (20W)(1) on page 18
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Voltage
Table 3. Voltage Programming and Measurement Accuracy/Resolution
Range Resolution
(noise limited)
Noise
(0.1 Hz to
10 Hz, peak
to peak),
Typical
Accuracy (23 °C ±5 °C) ± (%
of voltage + offset)6
Tempco ± (% of
voltage +
offset)/°C, 0 °C
to 55 °C
Tcal ±5 °C7Tcal ±1 °C7
600 mV 100 nV 2 μV 0.020% +
50 μV
0.017% +
30 μV
0.0005% + 1 μV
6 V 1 μV 6 μV 0.020% +
320 μV
0.017% +
90 μV
20 V 10 μV 20 μV 0.022% +
1 mV
0.017% +
400 μV
200 V 100 μV 200 μV 0.025% +
10 mV
0.020% +
2.5 mV
Related Information
Noise on page 8
Load Regulation on page 20
Remote Sense on page 22
6Accuracy is specified for no load output configurations. Refer to Load Regulation and Remote
Sense sections for additional accuracy derating and conditions.
7Tcal is the internal device temperature recorded by the PXIe-4137 at the completion of the last self-
calibration.
PXIe-4137 Specifications | © National Instruments Corporation | 7

Current
Table 4. Current Programming and Measurement Accuracy/Resolution
Range Resolution
(noise
limited)
Noise
(0.1 Hz to
10 Hz, peak
to peak),
Typical
Accuracy (23 °C ± 5 °C) ±
(% of current + offset)
Tempco ± (%
of current +
offset)/°C, 0 °C
to 55 °C
Tcal ± 5 °C8Tcal ± 1 °C8
1 μA 100 fA 4 pA 0.03% + 100 pA 0.022% + 40 pA 0.0006% +
4 pA
10 μA 1 pA 30 pA 0.03% + 700 pA 0.022% +
300 pA
0.0006% +
22 pA
100 μA 10 pA 200 pA 0.03% + 6 nA 0.022% + 2 nA 0.0006% +
200 pA
1 mA 100 pA 2 nA 0.03% + 60 nA 0.022% + 20 nA 0.0006% +
2 nA
10 mA 1 nA 20 nA 0.03% + 600 nA 0.022% +
200 nA
0.0006% +
20 nA
100 mA 10 nA 200 nA 0.03% + 6 μA 0.022% + 2 μA 0.0006% +
200 nA
1 A 100 nA 2 μA 0.04% + 60 μA 0.035% + 20 μA 0.0006% +
2 μA
3 A91 μA 20 μA 0.08% + 900 μA 0.075% +
600 μA
0.0018% +
20 μA
Noise
Wideband source noise <20 mV peak-to-peak in 20 V range, device
configured for normal transient response,
10 Hz to 20 MHz, typical
The following figures illustrate measurement noise as a function of measurement aperture for
the PXIe-4137.
8Tcal is the internal device temperature recorded by the PXIe-4137 at the completion of the last self-
calibration.
93 A range above 1 A is for pulsing only.
8| ni.com | PXIe-4137 Specifications

Figure 3. Voltage Measurement Noise vs. Measurement Aperture, Nominal
555.5 n
Measurement Noise, RMS (Volts)
100 n
1 μ
10 μ
100 μ
1 m
10 m
100 m
1 μ10 μ100 μ
Aperture (Seconds)
1 m 10 m
2 PLC
100 m
20 V Range
200 V Range
6 V Range
600 mV Range
Note When the aperture time is set to 2 power-line cycles (PLCs), measurement
noise differs slightly depending on whether the Power Line Frequency is set to
50 Hz or 60 Hz.
PXIe-4137 Specifications | © National Instruments Corporation | 9

Figure 4. Current Measurement Noise vs. Measurement Aperture, Nominal
555.5 n
Measurement Noise, RMS (Amps)
100 f
1 p
10 p
100 p
1 n
10 n
100 n
1 μ
10 μ
100 μ
1 m
10 m
1 μ10 μ100 μ
Aperture (Seconds)
1 m 10 m
2 PLC
100 m
3 A Range
1 A Range
100 mA Range
10 mA Range
1 mA Range
100 μA Range
10 μA Range
1 μA Range
Note When the aperture time is set to 2 power-line cycles (PLCs), measurement
noise differs slightly depending on whether the Power Line Frequency is set to
50 Hz or 60 Hz.
Related Information
Voltage on page 7
Sinking Power vs. Ambient Temperature
Derating
The following figure illustrates sinking power derating as a function of ambient temperature.
This applies to the PXIe-4137 (20W) when used with any chassis and only applies to the
PXIe-4137 (40W) when used with a chassis with slot cooling capacity <58 W.
10 | ni.com | PXIe-4137 Specifications

Figure 5. Sinking Power vs. Ambient Temperature Derating
Sinking Power (W)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Ambient Temperature (°C)
0 5 10 15 20 25 30 35 40 45 50 55 60
Note When using the PXIe-4137 (40W) with a chassis with slot cooling capacity
≥58 W, ambient temperature derating does not apply.
Related Information
Device Capabilities on page 3
PXIe-4137 Specifications | © National Instruments Corporation | 11

Output Resistance Programming Accuracy
Table 5. Output Resistance Programming Accuracy Characteristics
Current
Level/Limit
Range
Programmable
Resistance Range,
Voltage Mode
Programmable
Resistance Range,
Current Mode
Accuracy ± (% of
resistance
setting),
Tcal ± 5 °C10
1 μA 0 to ±5 MΩ ±5 MΩ to ±infinity 0.03%
10 μA 0 to ±500 kΩ ±500 kΩ to ±infinity
100 μA 0 to ±50 kΩ ±50 kΩ to ±infinity
1 mA 0 to ±5 kΩ ±5 kΩ to ±infinity
10 mA 0 to ±500 Ω ±500 Ω to ±infinity
100 mA 0 to ±50 Ω ±50 Ω to ±infinity
1 A 0 to ±5 Ω ±5 Ω to ±infinity
3 A11 0 to ±500 mΩ ±500 mΩ to ±infinity
Overvoltage Protection
Accuracy12 (% of OVP limit + offset) 0.1% + 200 mV, typical
Temperature coefficient (% of OVP limit +
offset)/°C
0.01% + 3 mV/°C , typical
Measurement location Local sense
Maximum OVP limit value 210 V
Minimum OVP limit value 2 V
10 Tcal is the internal device temperature recorded by the PXIe-4137 at the completion of the last self-
calibration.
11 3 A range above 1 A is for pulsing only.
12 Overvoltage protection accuracy is valid with an ambient temperature of 23 °C ± 5 °C and with Tcal
±5 °C. Tcal is the internal device temperature recorded by the PXIe-4137 at the completion of the
last self-calibration.
12 | ni.com | PXIe-4137 Specifications

Pulsed Operation
Dynamic load, minimum pulse cycle
time13
100 μs/A
The following figure visually explains the terms used in the extended range pulsing sections.
Figure 6. Definition of Pulsing Terminology
Pulse Cycle Time, t
(Minimum 5 ms)
On Time, t
(Minimum 10 µs)
Off Time, t off
Bias Level
Pulse Trigger Received Emit Source Complete Emit Measure Complete Emit Pulse Complete Emit Ready for Pulse Trigger Pulse Trigger Received
Pulse Level
Source
Delay
Bias
Delay
Measure
on
cycle
Extended Range Pulsing for PXIe-4137 (40W)15
The following figures illustrate the maximum pulse on time and duty cycle for the PXIe-4137
(40W) in a ≥58 W cooling slot, for a desired pulse voltage and pulse current given zero bias
voltage and current. The shaded areas allow for a quick approximation of output limitations
and limiting parameters. Actual limits are described by equations in Table 6. on page 15.
13 For example, given a continuous pulsing load, if the largest dynamic step in current that the load
sources/sinks is from 0.5 A to 1.0 A, then the maximum SMU current step is 0.5 A. Thus, the
minimum dynamic load pulse cycle time is 50 μs. Minimum dynamic load pulse cycle time is
independent of output voltage.
15 Extended range pulses fall outside DC range limits for either current or power. In-range pulses fall
within DC range limits and are not subject to extended range pulsing limitations. Extended range
pulsing is enabled by setting the Output Function to Pulse Voltage or Pulse Current.
PXIe-4137 Specifications | © National Instruments Corporation | 13

Figure 7. Pulse On-time vs Pulse Current and Pulse Voltage
Pulse Voltage (V)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
0.10 1.00 10.00 160.00
Pulse Current (A)
Limited by Maximum On
Time, Ton (Equation 1)
Limited by Maximum
Pulse Energy,
EPulse (Equation 3 or 8)
2 – 20
20 – 200
> 200
On Time (ms)
<2
Note Equations to solve for maximum pulse on time, tonMax, are shown in Table 6.
on page 15. Additionally, Equation 8 solves for pulse on time, ton, in terms of
maximum pulse energy in Example 1: Determining Extended Range Pulse On Time
and Duty Cycle Parameters for the PXIe-4137 (40W) on page 26.
14 | ni.com | PXIe-4137 Specifications

Figure 8. Duty Cycle vs Pulse Current and Pulse Voltage
Pulse Voltage (V)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
0 16010 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Pulse Current (A)
Limited by
Duty Cycle, D
(Equation 4)
Limited by
Cycle Average Power, P CA
(Equation 7 or 9)
40% to 60%
60% to 80%
> 80%
Duty Cycle
20% to 40%
< 20%
Note Equations to solve for maximum duty cycle, DMax, are shown in Table 6. on
page 15. Additionally, Equation 9 solves for pulse off time, toff, in terms of
maximum pulse energy in Example 1: Determining Extended Range Pulse On Time
and Duty Cycle Parameters for the PXIe-4137 (40W) on page 26.
Bias level limits
Maximum voltage, Vbias 200 V
Maximum current, Ibias 1 A
Table 6. PXIe-4137 (40W) Pulse Level Limits
Specification Value Equation
Maximum voltage,
VpulseMax
160 V —
Maximum current,
IpulseMax
3 A —
PXIe-4137 Specifications | © National Instruments Corporation | 15

Table 6. PXIe-4137 (40W) Pulse Level Limits (Continued)
Specification Value Equation
Maximum
on time,
tonMax16
If Ipulse >
1 A and
≥58 W Slot
Cooling
Capacity
Chassis
Calculate
using the
equation or
refer to
Figure 7.
on page 14
to estimate
the value.
tonMax = 100 ms * 2 A
|Ipulse|−1A
, where tonMax is ≤167 s
(Equation 1)
If Ipulse >
1 A and
<58 W Slot
Cooling
Capacity
Chassis
Calculate
using the
equation.
tonMax = 10 ms * 2 A
|Ipulse|−1A
, where tonMax is ≤167 s
(Equation 2)
If Ipulse ≤
1 A
tonMax =
167 s
—
Maximum pulse energy,
EpulseMax17
0.4 J
Epulse = Vpulse * Ipulse * ton
, where Epulse < EpulseMax
(Equation 3)
16 Pulse on time is measured from the start of the leading edge to the start of the trailing edge. See
Figure 6. on page 13.
17 Refer to Figure 7. on page 14 to estimate the value and determine the limiting equation for a
PXIe-4137 (40W) in a ≥58 W Slot Cooling Capacity Chassis.
16 | ni.com | PXIe-4137 Specifications

Table 6. PXIe-4137 (40W) Pulse Level Limits (Continued)
Specification Value Equation
Maximum
duty cycle,
DMax18
If ≥58 W
Slot
Cooling
Capacity
Chassis
Calculate
using the
equation or
refer to
Figure 8.
on page 15
to estimate
the value.
DMax =(1.18 A)2−|Ibias|2
|Ipulse|2−|Ibias|2* 100%
(Equation 4)
If <58 W
Slot
Cooling
Capacity
Chassis
Calculate
using the
equation. DMax =(1 A)2−|Ibias|2
|Ipulse|2−|Ibias|2* 100%
(Equation 5)
Minimum pulse cycle
time, tcycleMin
5 ms tcycle = ton + toff
, where tcycle > tcycleMin
(Equation 6)
Maximum
cycle
average
power,
PCAMax19
≥58 W Slot
Cooling
Capacity
Chassis
20 W
PCA =Vpulse * Ipulse * ton + Vbias * Ibias * toff
ton + toff
, where PCA < PCAMax
(Equation 7)
<58 W Slot
Cooling
Capacity
Chassis
10 W
18 Refer to Figure 8. on page 15 to estimate the value and determine the limiting equation for a
PXIe-4137 (40W) in a ≥58 W Slot Cooling Capacity Chassis. If D≥100%, consider switching
Output Function from Pulse mode to DC mode.
19 Refer to Figure 8. on page 15 to estimate the value and determine the limiting equation for a
PXIe-4137 (40W) in a ≥58 W Slot Cooling Capacity Chassis.
PXIe-4137 Specifications | © National Instruments Corporation | 17

Note Software will not allow settings that violate these limiting equations and will
generate an error.
Related Information
Device Capabilities on page 3
Extended Range Pulsing for PXIe-4137 (20W)20
Bias level limits
Maximum voltage 200 V
Maximum current 1 A
Pulse level limits
Maximum voltage 160 V
Maximum current 3 A
Maximum on time21 1 ms
Minimum pulse cycle time 5 ms
Energy 0.2 J
Maximum cycle average power 10 W
Maximum duty cycle 5%
Related Information
Device Capabilities on page 3
Transient Response and Settling Time
Transient response <70 μs to recover within 0.1% of voltage range
after a load current change from 10% to 90%
of range, device configured for fast transient
response, typical
Maximum slew rate22,23 0.5A/μs
20 Extended range pulses fall outside DC range limits for either current or power. In-range pulses fall
within DC range limits and are not subject to extended range pulsing limitations. Extended range
pulsing is enabled by configuring the Output Function to Pulse Voltage or Pulse Current.
21 Pulse on time is measured from the start of the leading edge to the start of the trailing edge. See
Figure 6. on page 13.
22 Optimize transient response, overshoot, and slew rate with NI SourceAdapt by adjusting the
Transient Response.
23 To improve the slew rate, see Examples of Determining Extended Range Pulse Parameters and
Optimizing Slew Rate using NI SourceAdapt on page 25.
18 | ni.com | PXIe-4137 Specifications

Settling time24
Voltage mode, 180 V step, unloaded25 <500 μs, typical
Voltage mode, 5 V step or smaller,
unloaded26
<70 μs, typical
Current mode, full-scale step, 3 A to
100 μA ranges27
<50 μs, typical
Current mode, full-scale step, 10 μA
range27
<150 μs, typical
Current mode, full-scale step, 1 μA
range27
<300 μs, typical
The following figures illustrate the effect of the transient response setting on the step response
of the PXIe-4137 for different loads.
Figure 9. 1 mA Range, No Load Step Response, Nominal
Amplitude (Volts)
Time (Microseconds)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
100
0.0 20 40 60 80
–0.1
1.1
Slow, no load
Normal, no load
Fast, no load
Custom, no load
24 Measured as the time to settle to within 0.1% of step amplitude, device configured for fast transient
response.
25 Current limit set to ≥60 μA and ≥60% of the selected current limit range.
26 Current limit set to ≥20 μA and ≥20% of selected current limit range.
27 Voltage limit set to ≥2 V, resistive load set to 1 V/selected current range.
PXIe-4137 Specifications | © National Instruments Corporation | 19

Figure 10. 1 mA Range, 100 nF Load Step Response, Nominal
Amplitude (Volts)
Time (Milliseconds)
0.4 0.8 1.2 1.6
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
2.0
–0.1
1.3
0.0
Slow, 100 nF load
Normal, 100 nF load
Custom, 100 nF load
Load Regulation
Voltage
Device configured for local sense 200 mV per A of output load change
(measured between output channel terminals) ,
typical
Device configured for remote sense 100 μV per A of output load change (measured
between sense terminals) , typical
Current, device configured for local or
remote sense
Load regulation effect included in current
accuracy specifications, typical
Related Information
Voltage on page 7
Measurement and Update Timing
Characteristics
Available sample rates28 (1.8 MS/s)/N where N = 1, 2, 3, … 224,
nominal
Sample rate accuracy Equal to PXIe_CLK100 accuracy, nominal
Maximum measure rate to host 1.8 MS/s per channel, continuous, nominal
28 When sourcing while measuring, both the Source Delay and Aperture Time affect the sampling
rate. When taking a measure record, only the Aperture Time affects the sampling rate.
20 | ni.com | PXIe-4137 Specifications