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Self-calibration is completed after warm-up period, or when switching from an external sample and/or reference clock to the onboard clock

Calibration cycle is maintained

Chassis fan speed is set to high

NI-SCOPE 3.8 or later instrument driver is used

External calibration is performed at 23 ±3 °C

Characteristic specifications are unwarranted values that are representative of an average unit operating at room temperature.

Typical specifications are unwarranted values that are representative of a majority (90%) of units within certain operating conditions and include the effects of temperature and

uncertainty unless otherwise noted.

Specifications are subject to change without notice. For the most recent NI 5185/5186 specifications, visit

.

ni.com/manuals

To access the NI 5185/5186 documentation, including the

, go to

NI High-Speed Digitizers Getting Started Guide

Start»All Programs»National

.

Instruments»NI-SCOPE»Documentation

Hot Surface If the NI 5185/5186 has been in use, it may exceed safe handling temperatures and cause burns. Allow the NI 5185/5186 to cool before removing it from

the chassis. Refer to the

section for operating temperatures of this device.

Environment

Caution Refer to the

document for important safety and electromagnetic compatibility information. To obtain a

Read Me First: Safety and Electromagnetic Compatibility

copy of this document online, visit

, and search for the document title.

ni.com/manuals

Caution To ensure the specified EMC performance, operate this product only with double-shielded cables (for example, RG-223/U) and accessories.

Vertical

Analog Input (Channel 0 and Channel 1)

Specification

Value

Comments

Number of Channels

Two (simultaneously sampled)

—

Input Type

Reference Single-Ended

—

Connectors

SMA

—

Impedance and Coupling

Input Impedance, Typical

50 Ω ±1.5%

—

Input Coupling

DC

—

Voltage Standing Wave Ratio (VSWR),

Characteristic

DC ≤ f ≤ 1 GHz

1.25:1

—

1 GHz < f ≤ 5 GHz

1.8:1

VSWR and Input Return Loss

Voltage Levels

Full Scale (FS) Input Range and

Programmable Vertical Offset

Range (V )

pp

Vertical Offset

Range (V)

The NI 5185/5186 can accurately measure signals up to 1 V

with ±0.25 V offset.

pp

0.11 V

to 1 V

in >

pp

pp

0.3 mV steps

±0.25

Maximum Input Overload, Characteristic

|Peaks| ≤ 1 V

Signals exceeding the Maximum Input Overload may cause damage to the device.

Accuracy

Resolution

8 bits

—

DC Accuracy (Programmable Vertical

Offset = 0 Volts), Warranted

±(2% of Input + 0.35% of FS + 0.7 mV)

Within ±3 ºC of self-calibration temperature.

Programmable Vertical Offset Accuracy,

Warranted

±1.2% of Offset Setting

DC Drift, Characteristic

±(0.23% of Input + 0.03% of FS) per ºC

Use DC Drift to calculate errors when temperature changes more than ±3 °C since the

last self-calibration.

Programmable Vertical Offset Drift,

Characteristic

±0.02% of Offset Setting per ºC

Use Programmable Vertical Offset Drift to calculate errors when temperature changes

more than ±3 °C since the last self-calibration.

AC Amplitude Accuracy, Warranted

±0.35 dB at 50 kHz

Within ±3 ºC of self-calibration temperature.

AC Amplitude Drift, Characteristic

±0.014 dB per ºC at 50 kHz

Use AC Amplitude Drift to calculate errors when temperature changes more than ±3 °C

since the last self-calibration.

Crosstalk, Characteristic

CH 0 to/from CH 1

Measured on one channel with test signal applied to other channel. Same range

settings used on both channels.