National Instruments PXIe-5665 Gebrauchs- und Pflegehandbuch

CALIBRATION PROCEDURE

PXIe-5665

3.6 GHz and 14 GHz RF Vector Signal Analyzer

This document contains the verification procedures for the National Instruments PXIe-5665

RF vector signal analyzer (VSA). Refer to ni.com/calibration for more information about

calibration solutions.

When not otherwise specified, the procedures in this document refer to both the PXIe-5665

3.6 GHz VSA and the PXIe-5665 14 GHz VSA products. In places where the procedures differ

between the two products, the appropriate device settings are specified.

Note PXIe-5665 tuned frequencies greater than 3.6 GHz and procedures with the

preselector enabled for frequencies greater than 3.6 GHz apply only to the PXIe-5665

14 GHz VSA.

NI warrants the PXIe-5665 to meet its published specifications if the individual modules are

calibrated and operating within specifications. For more information about RF system

calibration, visit ni.com/manuals and search for Letter of Conformance.

Contents

Software.................................................................................................................................... 2

Documentation.......................................................................................................................... 2

Test Equipment......................................................................................................................... 3

Test Conditions......................................................................................................................... 10

System Options......................................................................................................................... 11

Initial Setup............................................................................................................................... 11

Characterizing the Test System ................................................................................................ 11

Zeroing and Calibrating the Power Sensor....................................................................... 11

Characterizing Power Splitter Reference Output ............................................................. 11

Characterizing Power Splitter Difference......................................................................... 12

Characterizing RF Source Power (Direct)........................................................................ 13

Characterizing RF Source Power (with Lowpass Filter).................................................. 15

Characterizing RF Source Power (Combined) for Frequencies ≤700 MHz..................... 17

Characterizing RF Source Power (Combined) for Frequencies >700 MHz..................... 19

Characterizing RF Source Power (Through Splitter) ....................................................... 21

Characterizing RF Source Power (with Splitter and Attenuator) ..................................... 23

Characterizing Spectrum Analyzer Response .................................................................. 25

As-Found and As-Left Limits................................................................................................... 27

Verification ............................................................................................................................... 27

Verifying Reference Accuracy ......................................................................................... 27

Verifying Phase Noise ...................................................................................................... 27

2|ni.com |PXIe-5665 Calibration Procedure

Verifying Frequency Response and Absolute Amplitude Accuracy ................................ 28

Verifying Frequency Response and Absolute Amplitude Accuracy for

Frequencies >10 MHz ........................................................................................... 28

Verifying Average Noise Level........................................................................................35

Verifying Non-Input-Related Spurs (Residual Spurs)...................................................... 40

Verifying LO-Related Spurs (Sideband Spurs) ................................................................ 43

Verifying Image Rejection................................................................................................48

Verifying Third-Order Intermodulation Distortion .......................................................... 53

Frequencies ≤700 MHz.............................................................................................53

Frequencies >700 MHz............................................................................................. 57

Verifying Second Harmonic Intercept (SHI)....................................................................62

Verifying Gain Compression ............................................................................................67

Frequencies ≤700 MHz.............................................................................................68

Frequencies >700 MHz.............................................................................................73

Verifying LO Output Power ............................................................................................. 79

Reverification............................................................................................................................ 83

Appendix A: Anti-Distortion Test Fixture................................................................................83

Appendix B: Power Sensor Calibration Factor Uncertainty..................................................... 84

Worldwide Support and Services .............................................................................................85

Software

Calibrating the PXIe-5665 requires you to install the following software on the calibration

system:

• NI-RFSA 2.5 or later

• NI Spectral Measurements Toolkit 2.5 or later

You can download all required software from ni.com/downloads.

The software supports programming the calibration procedures in the LabVIEW, C, and

LabWindows™/CVI™ application development environments (ADEs). When you install the

software, you need to install support only for the ADE that you intend to use.

Documentation

You might find the following documents helpful as you perform the calibration procedure:

• NI 5665 RF Vector Signal Analyzer Getting Started Guide

• NI RF Vector Signal Analyzers Help

• PXIe-5665 Specifications

The latest versions of these documents are available at ni.com/manuals.

This calibration procedure calibrates the PXIe-5665 as a single system. To calibrate the

PXIe-5653 or PXIe-5622 individually, refer to their calibration procedures, available at

ni.com/manuals.

PXIe-5665 Calibration Procedure |© National Instruments |3

Test Equipment

Table 1 lists the equipment NI recommends for the performance verification procedures. If the

recommended equipment is not available, select a substitute using the minimum requirements

listed in the table.

4|ni.com |PXIe-5665 Calibration Procedure

Table 1. Recommended Equipment for PXIe-5665 Calibration

Equipment Recommended Models Where Used Minimum Requirements

Power meter Anritsu ML2438A Verifying frequency response,

Verifying absolute amplitude accuracy,

Verifying LO output power

Display resolution: ≤0.01 dB

Settling: ±0.1%

Instrumentation accuracy: <±0.5%

Noise, zero set, and drift: ≤±0.5% full-scale

(lowest range)

Reference power uncertainty: ≤±0.9%

Reference output VSWR: <1.04 : 1

Power sensors (2x) Anritsu SC7400 Verifying frequency response,

Verifying absolute amplitude accuracy,

Verifying LO output power

Power range: -55 dBm to 20 dBm

Frequency range: 10 MHz to 16 GHz

Input VSWR:

10 MHz to 150 MHz .......... ≤1.17 : 1

150MHzto2GHz............. ≤1.08 : 1

2 GHz to 12.4 GHz............. ≤1.16 : 1

12.4 GHz to 18 GHz........... ≤1.21 : 1

Linearity:

-55 dBm to 20 dBm............ ≤1.8%

Calibration factor uncertainty: Refer to Appendix B:

Power Sensor Calibration Factor Uncertainty

PXIe-5665 Calibration Procedure |© National Instruments |5

Signal generator

(RF source 1)

Anritsu MG3692C

Options 2A, 3, 4, 15A, and 22

Verifying third-order intermodulation

distortion,

Verifying gain compression

Frequency range: 8 MHz to 16 GHz

Leveled power: -115 dBm to 18 dBm

Power accuracy: ±1.5 dB

Harmonics:

0.1 MHz to ≤10 MHz ......... <-30 dBc

>10 MHz to ≤100 MHz ...... <-40 dBc

>100 MHz to ≤2.2 GHz ..... <-50 dBc

>2.2 GHz to ≤16 GHz ........ <-30 dBc

Nonharmonic spurious:

0.1 MHz to ≤10 MHz ......... <-30 dBc

>10 MHz to ≤2.2 GHz ....... <-60 dBc

>2.2 GHz to ≤16 GHz ........ <-60 dBc

Output VSWR: <2.0 : 1

Signal generator

(RF source 2)

Anritsu MG3692C

Options 2A, 3, 4, 15A, and 22

Verifying frequency response,

Verifying absolute amplitude accuracy,

Verifying LO-related spurs,

Verifying image rejection,

Verifying third-order intermodulation

distortion,

Verifying second harmonic intercept,

Verifying gain compression,

Verifying LO output power

Frequency range: 0.1 Hz to 16 GHz

Leveled power: -115 dBm to 18 dBm

Power accuracy: ±1.5 dB

Harmonics:

0.1 MHz to ≤10 MHz ......... <-30 dBc

>10 MHz to ≤100 MHz ...... <-40 dBc

>100 MHz to ≤2.2 GHz ..... <-50 dBc

>2.2 GHz to ≤16 GHz ........ <-30 dBc

Nonharmonic spurious:

0.1 MHz to 10 MHz ........... <-30 dBc

10 MHz to ≤2.2 MHz......... <-60 dBc

>2.2 GHz to ≤16 GHz ........ <-60 dBc

Output VSWR: < 2.0 : 1

Table 1. Recommended Equipment for PXIe-5665 Calibration (Continued)

Equipment Recommended Models Where Used Minimum Requirements

6|ni.com |PXIe-5665 Calibration Procedure

Spectrum analyzer Rohde & Schwarz FSUP26

Options B60 and B61

Verifying frequency response,

Verifying phase noise,

Verifying LO-related spurs,

Verifying LO output power

Frequency range: 10 MHz to 18 GHz

Noise floor: <-152 dBm/Hz

Phase noise measurement using cross-correlation

Frequency counter marker feature

Spectrum analysis capabilities

50 Ωtermination

(three are included

in the PXIe-5665

kit)

NI 778353-01 Verifying average noise level,

Verifying non-input-related (residual)

spurs

—

PXI Express chassis PXIe-1065 or PXIe-1075 — —

PXI Express

controller

PXIe-8105 or PXIe-8133 — —

SMA (m)-to-

SMA (m) semi-rigid

cables (3x)*

NI 151611A-01 — —

SMA (m)-to-

SMA (m) semi-rigid

cable*

NI 151612A-01 — —

SMA (m)-to-

SMA (m)

semi-flexible cable*

NI 190412B-04 — —

SMA (m)-to-

SMA (m) flexible

cable*

NI 151890A-1R25 — —

Table 1. Recommended Equipment for PXIe-5665 Calibration (Continued)

Equipment Recommended Models Where Used Minimum Requirements

PXIe-5665 Calibration Procedure |© National Instruments |7

SMA (m)-to-

SMA (m) cables

(36 in.) (3x)

MegaPhase

G916-SISI-36

—Frequency range: DC to 18 GHz

Insertion loss: ≤2 dB at 18 GHz

Impedance: 50 Ω

VSWR: ≤1.35 : 1 at 18 GHz

3.5 mm (m)-to-

3.5 mm (m) adaptor

Huber+Suhner

32_PC35-50-0-2/199_NE

—Frequency range: DC to 18 GHz

Impedance: 50 Ω

Return loss:

DC to 1.5 GHz.................... ≥35 dB

1.5 GHz to 6.0 GHz............ ≥30 dB

6.0 GHz to 18.0 GHz.......... ≥20 dB

3.5 mm (f)-to-

3.5 mm (f) adaptor

Huber+Suhner

31_PC35-50-0-2/199_N

—Frequency range: DC to 18 GHz

Impedance: 50 Ω

Return loss:

DC to 1.5 GHz.................... ≥35 dB

1.5 GHz to 6.0 GHz............ ≥30 dB

6.0 GHz to 18.0 GHz.......... ≥20 dB

SMA (m)-to-

SMA (f) 10 dB

attenuator

Huber+Suhner

6610_SMA-50-1/199N

—Frequency range: DC to 18 GHz

Attenuation: 10 dB (nominal)

Power rating: 2 W average

Impedance: 50 Ω

VSWR:

DC to 4 GHz....................... ≤1.15 : 1

4 GHz to 8 GHz.................. ≤1.20 : 1

8 GHz to 12.4 GHz............. ≤1.25 : 1

12.4 GHz to 18 GHz........... ≤1.35 : 1

Table 1. Recommended Equipment for PXIe-5665 Calibration (Continued)

Equipment Recommended Models Where Used Minimum Requirements

8|ni.com |PXIe-5665 Calibration Procedure

SMA (m)-to-

SMA (f) 20 dB

attenuator

Huber+Suhner

6620_SMA-50-1/199N

—Frequency range: DC to 18 GHz

Attenuation: 20 dB (nominal)

Power rating: 2 W average

Impedance: 50 Ω

VSWR:

DC to 4 GHz....................... ≤1.15 : 1

4 GHz to 8 GHz.................. ≤1.20 : 1

8 GHz to 12. GHz............... ≤1.25 : 1

12.4 GHz to 18 GHz........... ≤1.35 : 1

Power splitter

(two-resistor type)

Aeroflex/Weinschel 1593 —Frequency range: DC to 18 GHz

Amplitude tracking: <0.25 dB

Phase tracking: <4°

Insertion loss: ≤8.5 dB (6 dB, nominal)

Power rating: 1 W

Impedance: 50 Ω

VSWR:

DC to 18 GHz..................... ≤1.25 : 1

Equivalent output VSWR:

DC to 18 GHz..................... ≤1.25 : 1

Connectors: 3.5 mm (f)

Anti-distortion test

fixture

NI 166375A-01 Verifying third-order intermodulation

distortion,

Verifying second harmonic intercept,

Verifying gain compression

Refer to Appendix A: Anti-Distortion Test Fixture for

specifications.

Note: The anti-distortion test fixture requires an external

+12 VDC supply and USB interface. Contact NI for

programming details.

Table 1. Recommended Equipment for PXIe-5665 Calibration (Continued)

Equipment Recommended Models Where Used Minimum Requirements

PXIe-5665 Calibration Procedure |© National Instruments |9

Frequencyreference

source

Symmetricom 8040

rubidium frequency standard

—Frequency: 10 MHz

Frequency accuracy: ±1 × 10-9

Torque wrench — — Refer to Test Conditions for torque wrench specifications.

*Included in the PXIe-5665 cable accessory kit.

Table 1. Recommended Equipment for PXIe-5665 Calibration (Continued)

Equipment Recommended Models Where Used Minimum Requirements

10 |ni.com |PXIe-5665 Calibration Procedure

Test Conditions

The following setup and environmental conditions are required to ensure the PXIe-5665 meets

published specifications.

• Keep cabling as short as possible. Long cables and wires act as antennae, picking up extra

noise that can affect measurements.

• Verify that all connections, including front panel connections and screws, are secure.

• Maintain an ambient temperature of 23 °C ±5 °C.

• Keep the relative humidity between 10% and 90%, noncondensing.

• Allow a warm-up time of at least 30 minutes after NI-RFSA is loaded and recognizes the

PXIe-5665. The warm-up time ensures that the measurement circuitry of the PXIe-5665 is

at a stable operating temperature.

• Perform self-calibration on the PXIe-5665.

• Use a torque wrench appropriate for the type of RF connector that you are using.

NI recommends a 0.565 N · m (5 lb · in.) wrench for SMA connectors and a 0.90 N · m

(8 lb · in.) wrench for 3.5 mm connectors.

• Connect the frequency reference source to the REF IN connector on the back of the

PXI Express chassis with a standard BNC (m)-to-BNC (m) cable. This connection replaces

the connection from the PXIe-5653 REF OUT (10 MHz) connector to the PXI Express

chassis REF IN connector, if present.

• Lock all test equipment to the REF OUT signal on the back of the PXI Express chassis.

Refer to the NI 5665 Timing Configurations topic in the NI RF Vector Signal Analyzers

Help for more information about configuring clocking sources.

• Ensure that the PXI/PXI Express chassis fan speed is set to HIGH, that the fan filters, if present,

are clean, and that the empty slots contain filler panels. For more information, refer to the

Maintain Forced-Air Cooling Note to Users document available at ni.com/manuals.

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