National Instruments PXI-5663 Handbuch

CALIBRATION PROCEDURE

NI PXI-5663

This document contains instructions for writing a manual calibration procedure for the

NI PXI-5663 (NI 5663) RF vector signal analyzer. For more information about calibration, visit

ni.com/calibration.

Contents

Software Requirements............................................................................................................. 1

Documentation Requirements .................................................................................................. 2

Calibration Interval................................................................................................................... 2

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

Test Conditions......................................................................................................................... 5

Calibration Procedures ............................................................................................................. 5

Initial Setup....................................................................................................................... 6

Test System Characterization ........................................................................................... 6

Power Splitter Reference Output.............................................................................. 6

Power Sensor Zero/Calibration ................................................................................ 6

RF Input Calibration................................................................................................. 6

As-Found and As-Left Limits........................................................................................... 9

Verification Procedures .................................................................................................... 9

Verifying Reference Accuracy ................................................................................. 9

Absolute Accuracy Verification ............................................................................... 9

Average Noise Level Verification............................................................................ 14

LO Output Power Verification ................................................................................. 17

Non-Input-Related Spurs (Residual Spurs) Verification.......................................... 19

Sideband Spurs Verification..................................................................................... 21

Phase Noise Verification .......................................................................................... 25

Appendix A: Non-Input-Related Spurs Test Frequencies........................................................ 28

Where to Go for Support .......................................................................................................... 32

Software Requirements

To calibrate the NI 5663, you must install NI-RFSA version 2.3 or later and the NI Spectral

Measurements Toolkit version 2.4 or later on the calibration system.

Note NI-RFSA version 2.1 does not include adjustment VIs.

You can download NI-RFSA from ni.com/updates.

2|ni.com |NI PXI-5663 Calibration Procedure

NI-RFSA supports programming the calibration procedures in LabVIEW, C, and

LabWindows™/CVI™. Refer to Table 1 for file locations.

For more information about calibration VIs and functions, install NI-RFSA and refer to the

NI RF Vector Signal Analyzers Help, accessible through Start»Programs»National

Instruments»NI RFSA»Documentation»NI RF Vector Signal Analyzers Help.

This calibration procedure calibrates the NI PXIe-5663 RF vector signal analyzer as a single

device. To calibrate the NI 5601 or NI 5652, refer to their calibration procedures at ni.com/

manuals.

Documentation Requirements

You might find the following documentation helpful as you write the calibration procedure:

•NI 5663 Specifications

•NI 5661/5663/5663E RF Vector Signal Analyzers Getting Started Guide

•NI RF Vector Signal Analyzers Help, which includes LabVIEW and LabWindows/CVI

application programming references

These documents are installed with NI-RFSA. You also can find the latest versions of these

documents at ni.com/manuals.

Calibration Interval

NI recommends that you perform a complete calibration for the NI 5663 at least once a year.

Adjust the recommended calibration interval based on the measurement accuracy demands

of your application.

Table 1. File Locations

File Name and Location Description

IVI

>\bin\niRFSA.dll NI-RFSA instrument driver containing the entire NI-RFSA

API, including calibration functions.

LabVIEW

>\instr.lib\

niRFSA\niRFSA.llb

LabVIEW VI library containing VIs for calling the

NI-RFSA calibration API. You can access calibration VIs

from the NI-RFSA calibration section of the LabVIEW

Functions palette.

NI PXI-5663 Calibration Procedure |© National Instruments |3

Test Equipment

NI recommends that you use the equipment in Table 2 to calibrate the NI 5601. If the

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

listed in the table.

Table 2. Required Equipment for NI 5663 Calibration

Equipment Recommended Model Minimum Requirements

Power meter Anritsu ML2438A Display resolution: <0.01 dB

Settling: <0.1%

Instrumentation accuracy: <0.5%

Noise: <0.5% full-scale (lowest range)

Zero set and drift: <0.5% full-scale

(lowest range)

Reference power uncertainty: <0.9%

Reference output VSWR: <1.04:1

Power sensor A

Power sensor B

Anritsu MA2473D or

equivalent

Input VSWR:

10 MHz to 50 MHz ................ <1.9 :1

50 MHz to 150 MHz .............. <1.17 :1

150 MHz to 2 GHz ................ <1.12 :1

2 GHz to 12.4 GHz ................ <1.22 :1

Linearity:

-55 dBm to 20 dBm ............... <1.8 %

Rise time: <4 µs

Calibration factor uncertainty:

50 MHz .................................. <1.48%

100 MHz ................................ <1.37%

300 MHz ................................ <1.42%

500 MHz ................................ <0.96%

1 MHz .................................... <0.99%

2 GHz ..................................... <1.04%

3 GHz ..................................... <1.05%

4 GHz ..................................... <1.64%

5 GHz ..................................... <1.39%

6 GHz ..................................... <1.45%

7 GHz ..................................... <1.26%

Signal generator

(RF source)

Anritsu MG3692B Frequency range: 10 MHz to 6.6 GHz

Power level: -60 dBm to 20 dBm

50 Ωterminator

(2 required)

NI 778353-01 —

4|ni.com |NI PXI-5663 Calibration Procedure

Optional:

Signal generator

(PN source)

Rhode & Schwarz

SMA100A-B22

Frequency range: 1 GHz

Power level: 0 dBm

Phase noise (1 GHz)

100 Hz .................................... -107 dBc/Hz

1 kHz ......................................-125 dBc/Hz

10 kHz ....................................-137 dBc/Hz

100 kHz ..................................-137 dBc/Hz

1 MHz.....................................-150 dBc/Hz

PXI Express

chassis

NI PXIe-1065 or

NI PXIe-1075

—

PXI Express

controller

NI PXIe-8105 —

SMA (m)-SMA (m)

semi-rigid cable*

NI 198775A-01 —

SMA (m)-SMA (m)

semi-rigid cable*

NI 198776A-01 —

SMA (m)-SMA (m)

semi-flexible cable*

NI 190412B-03 —

SMA (m)-SMA (f)

right angle adapter

Huber+Suhner

53-SMA-50-0-2/111_N

—

3.5 mm (m)-to-

3.5 mm (m) adapter

Huber+Suhner

32-PC35-50-0-2/199_NE

—

3.5 mm (f) power

splitter (2 resistor

type)

Aeroflex 1593 —

SMA (m)-to- SMA

(m) cable

(36 in.)

Huber+Suhner

ST-18/SMAm/SMAm/36

—

3.5 mm (m)-to-

3.5 mm (f) 30 dB

attenuator

Huber+Suhner

6630 SMA-50-1/199NE

—

N(m)-to-3.5 mm (f)

adapter

Huber+Suhner

33_N-SMA-50-1/

113_UE

—

*Included in the NI PXIe-5663 cable accessory kit.

Table 2. Required Equipment for NI 5663 Calibration (Continued)

Equipment Recommended Model Minimum Requirements

NI PXI-5663 Calibration Procedure |© National Instruments |5

Test Conditions

Follow these guidelines to optimize the connections and the environment during calibration:

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

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

• 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.

• (Optional) Clean the chassis fan filters at least every six months. Some chassis include fan

filters. Depending on the amount of chassis use and the ambient dust levels, filters might

require more frequent cleaning. If regular maintenance of dirty or clogged filters is not

possible, you can remove the filters to maintain adequate cooling.

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

NI 5663. The warm-up time ensures that the measurement circuitry of the NI 5663 is at a

stable operating temperature.

• Use an SMA torque wrench (5 in. · lb, Agilent 8710-1582 or equivalent) to tighten any

connection with an SMA connector.

• Use a 3.5 mm torque wrench (8 in. · lb, Agilent 8710-1765 or equivalent) to tighten 3.5 mm

or 2.92 mm (K) connections without an SMA connector.

• Lock all test equipment to the same reference frequency. Refer to the NI 5663/5663E

Timing Configurations topic in the NI RF Vector Signal Analyzers Help.

Calibration Procedures

The calibration process includes the following procedures:

1. Initial Setup—Install the NI 5663 and configure it in Measurement & Automation Explorer

(MAX).

2. Test System Characterization—Characterize the response of the test system. Use the

measured response during the verification tests.

3. Verification Procedures—Measure the operation of the NI 5663. This procedure checks

whether the device is operating within its published specifications.

If the NI 5663 fails any of the verification tests, complete the following steps:

Note Complete the verification for all NI 5663 specifications where as-found data

is required before performing any module calibrations.

1. Module Calibration—Perform a calibration of the individual modules. Refer to the

following module calibration procedures at ni.com/manuals:

•NI PXI-5650/5651/5652 Calibration Procedure

•NI PXIe-5622 Calibration Procedure

•NI PXIe-5601 Calibration Procedure

6|ni.com |NI PXI-5663 Calibration Procedure

2. Reverification—Repeat the verification procedure for the NI 5663 to ensure that it is

operating within the device specifications after adjustment.

Initial Setup

Refer to the NI 5661/5663/5663E RF Vector Signal Analyzers Getting Started Guide for

information about how to install the NI-RFSA software and the NI 5663 hardware and how to

configure the NI 5663 in MAX.

Test System Characterization

These procedures characterize the test system response. Use the results of these procedures in

the Verification Procedures section of this document.

Measure the power splitter (and attenuation) response at the RF input frequencies used in the

verification tests.

Caution The connectors on the DUT and test equipment are fragile. Perform the

instructions in this procedure with great care to prevent damaging any DUTs or test

equipment.

Power Splitter Reference Output

Designate either of the two outputs of the power splitter as the reference output.

Power Sensor Zero/Calibration

1. Connect channel A of the power meter to power sensor A.

2. Connect channel B of the power meter to power sensor B.

3. Zero and calibrate the power sensors using the appropriate frequency for the calibration.

RF Input Calibration

This section describes how to calibrate the RF input you will use to verify the NI 5663.

Note Perform the power sensor zero/calibration prior to the step. The power splitter

reference output must have been defined prior to the step.

RF Input Calibration (Without Attenuator)

Use the results of this procedure in the Absolute Accuracy Verification, LO Output Power

Verification, Sideband Spurs Verification, and Phase Noise Verification tests.

1. Connect the power splitter input to the RF source output through the 3.5 mm-to-3.5 mm

cable.

2. Connect power sensor A to the previously designated reference output of the power splitter.

NI PXI-5663 Calibration Procedure |© National Instruments |7

3. Connect power sensor B to the other output of the power splitter. Figure 1 shows the

completed equipment setup.

Figure 1. RF Input Calibration (Without Attenuator) Equipment Setup

4. Measure the channel A and channel B power (using the appropriate frequency for the

power sensor) for all frequencies between 10 MHz and 7 GHz with the RF source power

set to 0 dBm.

Note Use the log frequency progression: 10, 20, 30, ..., 100, 200, 300, ...,

1,000 MHz, and so on.

5. Calculate the RF input calibration factor (dB) for each frequency using the following equation:

RF Input Calibration Factor = Channel B Power - Channel A Power

RF Input Calibration (with Attenuator)

Use the results of the RF Input Calibration (with Attenuator) procedure in the absolute accuracy

test.

1. Connect the power splitter input to the RF source output through the 3.5 mm-to-3.5 mm cable.

2. Connect power sensor A to the previously designated reference output of the power splitter.

1 RF Source

2 Power Splitter

3 Power Sensor A

4PowerMeter

5 Power Meter Channel A

6 Power Meter Channel B

7 Power Sensor B

8|ni.com |NI PXI-5663 Calibration Procedure

3. Connect power sensor B to the other output of the power splitter through the 30 dB

attenuator. Figure 2 shows the completed equipment setup.

Figure 2. RF Input Calibration (with Attenuator) Equipment Setup

4. Measure the channel A and channel B power (using the appropriate frequency for the

power sensor) for all frequencies between 10 MHz and 7 GHz with the RF source power

set to 0 dBm.

Note Use the log frequency progression: 10, 20, 30, ..., 100, 200, 300, ...,

1,000 MHz, and so on.

5. Calculate the RF input attenuated calibration factor (dB) for each frequency using the

following equation:

RF Input Attenuated Calibration Factor = Channel B Power - Channel A Power

1 RF Source

2 Power Splitter

3 Power Sensor A

4 Power Meter

5 Power Meter Channel A

6 Power Meter Channel B

7 Power Sensor B

8 30 dB Attenuator

NI PXI-5663 Calibration Procedure |© National Instruments |9

As-Found and As-Left Limits

The as-found limits are the published specifications for the NI 5663. NI uses these limits to

determine whether the NI 5663 meets the device specifications when it is received for

calibration.

The as-left limits are equal to the published NI specifications for the NI 5663, less guard bands

for temperature drift and drift over time. NI uses these limits to determine whether the NI 5663

meets the device specifications over its calibration interval.

Note Where there is no difference between an “As Found” and an “As Left” limit,

only a “Test Limit” is specified.

Verification Procedures

Verification tests the following NI 5663 specifications:

• Absolute accuracy

• Average noise level

• LO output power

• Non-input-related spurs (residual spurs)

• Sideband spurs

• Phase noise

Verification of the NI 5663 is complete only after you have successfully completed all tests in

this section.

Caution The connectors on the DUT and test equipment are fragile. Perform the

instructions in this procedure with great care to prevent damaging any DUTs or test

equipment.

Verifying Reference Accuracy

The NI 5663 reference accuracy specification is derived from the NI 5652 frequency accuracy.

For more information about NI PXI-5652 calibration values, refer to the NI PXI-5650/5651/5652

Calibration Procedure available at ni.com/manuals.

Absolute Accuracy Verification

Table 5 shows the test limits.

Reference Levels Less than -30 dBm

1. Connect the RF source to the power splitter input through the 3.5 mm-to-3.5 mm cable.

2. Connect the power splitter reference output to power sensor A.

3. Connect the other power splitter output to the NI 5601 RF IN connector through the 30 dB

attenuator and 3.5 mm (m)-to-3.5 mm (m) adapter.

10 |ni.com |NI PXI-5663 Calibration Procedure

4. Connect a 50 Ωterminator to the NI 5601 LO OUT connector. Figure 3 shows the

completed equipment setup.

Figure 3. Absolute Accuracy Equipment Setup

5. Create a new session for the NI 5663 using the niRFSA Initialize VI or the niRFSA_init

function.

6. Perform a self-calibration on the NI 5622 using the niRFSA Self Cal VI or the

niRFSA_SelfCal function.

7. Lock the NI PXI-5652 to the reference used by the test equipment. Use the niRFSA

Configure Ref Clock VI or the niRFSA_ConfigureRefClock function.

8. Set the NI 5663 to make a spectrum acquisition using the niRFSA Configure Acquisition

Type VI or the niRFSA_ConfigureAcquisitionType function.

1RFSource

2 Power Splitter

3 Power Sensor A

4 Power Meter

5 Power Meter Channel A

650ΩTerminator

7 30 dB Attenuator*

* Used for reference levels <-30 dBm.

ACCESS ACTIVE

CLK IN

CLK OUT

PFI 1

ESD

SENSITIVE

TTL

6.3 Vp-p

MAX

2 Vp-p

NOM

+20 dBm MAX

50 Ω

NI PXIe-5622

16-Bit IF Digitizer

IF IN

0 dBm NOM

RF IN

IF OUT

LO IN

LO OUT

10 MHz – 6.6 GHz

ACCESS ACTIVE

ALL PORTS

±5 VDC MAX

50 Ω

0 dBm NOM

+20 dBm MAX

[+30 dBm MAX

w/Attenuation]

RF Downconverter

NI PXIe- 5601

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