National Instruments PXIe-5693 Manual

CALIBRATION PROCEDURE

NI PXIe-5693

RF Preselector Module

This document contains the verification and adjustment procedures for the National Instruments

PXIe-5693 (NI 5693) RF preselector module. Refer to ni.com/calibration for more

information about calibration solutions.

Contents

Required Software .................................................................................................................... 2

Related Documentation ............................................................................................................ 2

Test Equipment......................................................................................................................... 2

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

Initial Setup............................................................................................................................... 10

Characterizing the Test System ................................................................................................ 10

Designating the Power Splitter Reference Output............................................................ 11

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

Characterizing the RF Source 1 Power (Direct) ............................................................... 11

Characterizing the RF Source 2 Power (Direct) ............................................................... 13

Characterizing the RF Source Power (with Splitter and Attenuator) ............................... 14

Characterizing the RF Source Power (with Combiner, Splitter, and 20 dB

Attenuator).....................................................................................................................15

Characterizing the Spectrum Analyzer (with Cable and 10 dB Attenuator) .................... 18

As-Found and As-Left Limits................................................................................................... 19

Verification ............................................................................................................................... 19

Verifying Noise Figure ..................................................................................................... 19

Verifying In-Band Third Order Intercept (TOI)............................................................... 24

Verifying Out-of-Band TOI.............................................................................................. 29

Verifying Reverse Isolation.............................................................................................. 34

Verifying Calibration Signal Amplitude Accuracy .......................................................... 38

Adjustment................................................................................................................................ 41

Adjusting RF Gain............................................................................................................ 41

Adjusting Cal Tone Power Accuracy ............................................................................... 44

Reverification ........................................................................................................................... 47

Appendix A: Test Frequencies for RF Gain Adjustment ......................................................... 47

Appendix B: Test Frequencies for Cal Tone Amplitude Adjustment ...................................... 51

Worldwide Support and Services ............................................................................................. 54

2|ni.com |NI PXIe-5693 Calibration Procedure

Required Software

Calibrating the NI 5693 requires you to install the following software on the calibration system.

• NI-RFSA 2.6 or later

• NI Spectral Measurements Toolkit 2.6 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.

Related Documentation

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

•NI 5693 RF Preselector Module Getting Started Guide

•NI 5667 (3.6 GHz) Spectrum Monitoring Receiver Getting Started Guide

•NI 5667 (7 GHz) Spectrum Monitoring Receiver Getting Started Guide

•NI RF Vector Signal Analyzers Help

•NI PXIe-5693 Specifications

•NI PXIe-5667 (3.6 GHz) Specifications

•NI PXIe-5667 (7 GHz) Specifications

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

This calibration procedure calibrates the NI 5693 as an independent module. To calibrate the

NI 5693 as a part of the NI PXIe-5667 (NI 5667), refer to the NI PXIe-5667 Calibration

Procedure document available at ni.com/manuals.

Test Equipment

Table 1 lists the equipment NI recommends for the performance verification and adjustment

procedures. If the recommended equipment is not available, select a substitute using the

minimum requirements listed in the table.

NI PXIe-5693 Calibration Procedure |© National Instruments |3

Table 1. Recommended Equipment for NI 5693 Calibration

Equipment Recommended Models Where Used Minimum Requirements

Noise source NoiseCom NC346B Precision Noise figure verification Frequency: 10 MHz to 8 GHz

Output ENR: 14 dB to 16 dB

VSWR: 1.25

Spectrum analyzer Rohde & Schwarz

FSU26 Options B23, B25

Test system characterization

Verifications:

• Noise figure

• In-band third order intercept

• Out-of-band third order

intercept

• Reverse isolation

Frequency range: 20 MHz to 8 GHz

Internal preamplifier

Noise source control (28 V supply, BNC

connector)

Power meter Anritsu ML2438A Test system characterization

Verifications:

• In-band third order intercept

• Out-of-band third order

intercept

• Reverse isolation

• Calibration signal amplitude

accuracy

Adjustments:

•RFgain

• Calibration tone power

accuracy

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

4|ni.com |NI PXIe-5693 Calibration Procedure

(2x) Power sensor

(power sensor A)

(power sensor B)

Anritsu MA2473D Test system characterization

Verifications:

• In-band third order intercept

• Out-of-band third order

intercept

• Reverse isolation

• Calibration signal amplitude

accuracy

Adjustments:

•RFgain

• Calibration tone power

accuracy

Power range: -55 dBm to 20 dBm

Frequency range: 10 MHz to 8 GHz

Input VSWR:

10 MHz to 50 MHz ........................<1.90

50 MHz to 2 GHz...........................<1.12

2 GHz to 8 GHz .............................<1.22

Linearity:

-60 dBm to 20 dBm........................<1.8%

Calibration factor uncertainty:

10 MHz to 50 MHz ........................<1.9%

50 MHz to 500 MHz ......................<1.5%

500 MHz to 7 GHz.........................<1.5%

7 GHz to 8 GHz .............................<1.9%

Table 1. Recommended Equipment for NI 5693 Calibration (Continued)

Equipment Recommended Models Where Used Minimum Requirements

NI PXIe-5693 Calibration Procedure |© National Instruments |5

(2x) Signal

generator

(RF source 1)

(RF source 2)

Anritsu MG3692C

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

Test system characterization

Verifications:

• In-band third order intercept

• Out-of-band third order

intercept

• Reverse isolation

• Calibration signal amplitude

accuracy

Adjustments:

•RFgain

• Calibration tone power

accuracy

Frequency range: 8 MHz to 8 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 ≤8 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 ≤8 GHz......................<-60 dBc

Output VSWR: <2.0

(4x) SMA (m)-to-

SMA (m) cable

(36 in.)

MegaPhase G916-SISI-36 —Frequency range: DC to 8 GHz

Insertion loss: ≤2 dB at 8 GHz

Impedance: 50 Ω

VSWR: ≤1.35 at 8 GHz

SMA (f)-to-

SMA (m)

semi-rigid cable

(1.08 in. with

slight angle bend)

Rosenberger 166782A-01 —Frequency range: DC to 8 GHz

Table 1. Recommended Equipment for NI 5693 Calibration (Continued)

Equipment Recommended Models Where Used Minimum Requirements

6|ni.com |NI PXIe-5693 Calibration Procedure

(2x) BNC (m)-to-

BNC (m) cable

(36 in.)

NI 763485-01 Noise figure verification —

(2x) BNC (m)-to-

BNC (m) cable

— — —

SMA (m)-to-

SMA (m) adapter

Huber+Suhner

32_SMA-50-0-52/199_NE

Verifications:

• In-band third order intercept

• Out-of-band third order

intercept

• Reverse isolation

• Calibration signal amplitude

accuracy

Adjustments:

•RFgain

• Calibration tone power

accuracy

Frequency range: DC to 8 GHz

VSWR: <1.14

SMA (f)-to-

SMA (f) adapter

Huber+Suhner

31_SMA-50-0-1/111_NE

Noise figure verification Frequency range: DC to 8 GHz

Table 1. Recommended Equipment for NI 5693 Calibration (Continued)

Equipment Recommended Models Where Used Minimum Requirements

NI PXIe-5693 Calibration Procedure |© National Instruments |7

SMA (m)-to-

SMA (f)

10 dB attenuator

Huber+Suhner

6610_SMA-50-1/199N

Test system characterization

Verifications:

• In-band third order intercept

• Out-of-band third order

intercept

• Reverse isolation

Frequency range: DC to 8 GHz

Attenuation: 10 dB (nominal)

Power rating: 2 W average

Impedance: 50 Ω

VSWR:

DC to 4 GHz ..................................≤1.15

4 GHz to 8 GHz .............................≤1.20

SMA (m)-to-

SMA (f)

20 dB attenuator

Huber+Suhner

6620_SMA-50-1/199N

Test system characterization

Verifications:

• In-band third order intercept

• Out-of-band third order

intercept

• Reverse isolation

• Calibration signal amplitude

accuracy

Frequency range: DC to 8 GHz

Attenuation: 20 dB (nominal)

Power rating: 2 W average

Impedance: 50 Ω

VSWR:

DC to 4 GHz ..................................≤1.15

4 GHz to 8 GHz .............................≤1.20

SMA (m)-to-

SMA (f)

6 dB attenuator

Anritsu 41KB-6 Test system characterization

Calibration signal amplitude

accuracy verification

Adjustments:

•RFgain

• Calibration tone power

accuracy

Frequency range: DC to 8 GHz

Attenuation: 6 dB

Power rating: 2 W average

Table 1. Recommended Equipment for NI 5693 Calibration (Continued)

Equipment Recommended Models Where Used Minimum Requirements

8|ni.com |NI PXIe-5693 Calibration Procedure

Power splitter

(two-resistor type)

Aeroflex/Weinschel 1593 Test system characterization

Verifications:

• In-band third order intercept

• Out-of-band third order

intercept

• Reverse isolation

• Calibration signal amplitude

accuracy

Adjustments:

•RFgain

• Calibration tone power

accuracy

Frequency range: DC to 8 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 8 GHz ..................................≤1.25

Equivalent output VSWR:

DC to 8 GHz ..................................≤1.25

Connectors: 3.5 mm (f)

Low frequency

power combiner

Mini Circuits ZFSC-2-5-S+ Test system characterization

Verifications:

• In-band third order intercept

• Out-of-band third order

intercept

Frequency range: 10 MHz to 1.5 GHz

Isolation:

10 MHz to 100 MHz ......................≥15 dB

100 MHz to 750 MHz ....................≥20 dB

750 MHz to 1.5 GHz......................≥18 dB

Insertion loss:

10 MHz to 100 MHz ......................≤3.6 dB

100 MHz to 750 MHz ....................≤4.0 dB

750 MHz to 1.5 GHz......................≤4.5 dB

Connectors: SMA (f)

Table 1. Recommended Equipment for NI 5693 Calibration (Continued)

Equipment Recommended Models Where Used Minimum Requirements

NI PXIe-5693 Calibration Procedure |© National Instruments |9

High frequency

power combiner

Agilent 87302C Test system characterization

Verifications:

• In-band third order intercept

• Out-of-band third order

intercept

Frequency range: 500 MHz to 8 GHz

Isolation:

500 MHz to 8 GHz ........................≥19 dB

Insertion loss:

500 MHz to 8 GHz ........................≤4.5 dB

Connectors: 3.5 mm (f)

Torque wrench — — Refer to Test Conditions for torque wrench

specifications.

Table 1. Recommended Equipment for NI 5693 Calibration (Continued)

Equipment Recommended Models Where Used Minimum Requirements

10 |ni.com |NI PXIe-5693 Calibration Procedure

Test Conditions

The following setup and environmental conditions are required to ensure the NI 5693 meets

published specifications.

• Keep cabling as short as possible. Long cables and wires act as antennas, 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.

• Ensure that the 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 about

maintaining adequate air circulation in your PXI/PXI Express chassis, refer to the Maintain

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

• Allow a warm-up time of at least 30 minutes after the chassis is powered on and NI-RFSA

is loaded and recognizes the NI 5693. The warm-up time ensures that the NI 5693 and test

instrumentation are at a stable operating temperature.

• In each verification procedure, insert a delay between configuring all devices and acquiring

the measurement. This delay may need to be adjusted depending on the instruments used

but should always be at least 1,000 ms for the first iteration and 100 ms for each other

iteration.

• Use an appropriate torque wrench or torque screwdriver and SMA driver bit to tighten all

module RF connectors (SMA or 3.5 mm). NI recommends use of 1 N · m (9 lb · in.).

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

Refer to the NI 5667 Timing Configurations topic in the NI RF Vector Signal Analyzers

Help for more information about configuring clocking sources.

Initial Setup

Refer to the NI 5693 RF Preselector Module Getting Started Guide for information about how

to install the software and hardware and how to configure the NI 5693 in Measurement &

Automation Explorer (MAX).

Characterizing the Test System

You use the measured response of the test system during verification tests.

The power splitter and attenuation response is measured at the RF input frequencies used in the

verification tests.

Caution The connectors on the device under test (DUT) and test equipment are

fragile. Carefully perform the steps in these procedures to prevent damaging any

DUTs or test equipment.

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