Keysight NFA Series Performance Verification And Calibration Manual
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Keysight NFA Series Performance Verification And Calibration Manual

Noise figure analyzers
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Noise Figure Analyzers
NFA Series
Performance Verification and
Calibration Guide
Manufacturing Part Number: N8972-90083
January 2019
Supersedes: December 2001
© Copyright 2001-2019 Keysight Technologies

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Summary of Contents for Keysight NFA Series

  • Page 1 Noise Figure Analyzers NFA Series Performance Verification and Calibration Guide Manufacturing Part Number: N8972-90083 January 2019 Supersedes: December 2001 © Copyright 2001-2019 Keysight Technologies...
  • Page 2 Safety Notices The information contained in this document is subject to change without notice. Agilent Technologies makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Agilent Technologies shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.
  • Page 3 General Safety Information The following general safety precautions must be observed during all phases of operation, service, and repair of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument.
  • Page 4 WARNING This is a Safety Class 1 Product (provided with a protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protected earth contact. Any interruption of the protective conductor inside or outside of the product is likely to make the product dangerous.
  • Page 5 This symbol indicates that a device, or part of a device, may be susceptible to electrostatic discharges (ESD) which can result in damage to the product. Observe ESD precautions given on the product, or its user documentation, when handling equipment bearing this mark.
  • Page 6 Warranty This Agilent Technologies instrument product is warranted against defects in material and workmanship for a period of three years from date of shipment. During the warranty period, Agilent Technologies Company will, at its option, either repair or replace products which prove to be defective.
  • Page 7 EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES. AGILENT TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY. Where to Find the Latest Information Documentation is updated periodically.
  • Page 8 Electromagnetic Compatibility This product conforms with the protection requirements of European Council Directive 89/336/EEC for Electromagnetic Compatibility (EMC). The conformity assessment requirements have been met using the technical Construction file route to compliance, using EMC test specifications EN 55011:1991 (Group 1, Class A) and EN 50082-1:1992. In order to preserve the EMC performance of the product, any cable which becomes worn or damaged must be replaced with the same type and specification.
  • Page 9 Declaration of Conformity — N8972A...
  • Page 10 Declaration of Conformity — N8973A...
  • Page 11 Declaration of Conformity — N8974A...
  • Page 12 Declaration of Conformity — N8975A...

  • Page 13: Table Of Contents

    Contents 1. Preparing for Calibration and Performance Verification Test Purpose of Tests ..........2 Calibration Cycle .
  • Page 14 Contents Frequency Accuracy ........38 Test Description .
  • Page 15 Contents Test Specification ......... .73 Related Adjustment .
  • Page 16 Contents Frequency Accuracy Test Record......108 Noise Source Supply Accuracy Test Record ..... 109 Noise Figure Range and Accuracy Test Record .
  • Page 17 Contents Frequency Accuracy Test Record ......132 Noise Source Supply Accuracy Test Record ..... .133 Noise Figure Range and Accuracy Test Record .
  • Page 18 Contents Visual Inspection ......... . 157 Obvious Defects and Damage .
  • Page 19 Contents...
  • Page 20 Contents...

  • Page 21: Preparing For Calibration And Performance Verification Test

    Preparing for Calibration and Performance Verification Test This chapter covers preparation and equipment required for doing the calibration and performance verification tests.

  • Page 22: Purpose Of Tests

    Preparing for Calibration and Performance Verification Test Purpose of Tests Purpose of Tests The calibration and performance test procedures verify the electrical performance of the Agilent Technologies N8972A, N8973A, N8974A and N8975A series of Noise Figure Analyzers (NFAs) in accordance with their published specifications.

  • Page 23: Calibration Cycle

    Preparing for Calibration and Performance Verification Test Calibration Cycle Calibration Cycle The analyzer requires periodic verification of operational performance. Under normal use and environmental conditions, the instrument should be calibrated at 12 month intervals. The tables on the following pages list the tests required to perform the annual calibration, thus periodically verifying the instruments performance.

  • Page 24: Before You Start

    Preparing for Calibration and Performance Verification Test Before You Start Before You Start Switch on the Noise Figure Analyzer and let it warm up for 1 hour. Read the rest of this section before you start any of the tests, and make a copy of the relevant test records for the model you are testing provided in Appendices A through D.

  • Page 25: Recording The Test Results

    Preparing for Calibration and Performance Verification Test Recording the Test Results Recording the Test Results Performance verification test records for each Noise Figure Analyzer are provided in the section following the tests. Each test result is identified as a TR (test record) entry in the performance tests and in Appendix pertaining to the model you are testing.

  • Page 26: Recommended Test Equipment

    Preparing for Calibration and Performance Verification Test Recommended Test Equipment Recommended Test Equipment The following tables list the recommended test equipment for the performance tests. The tables also list recommended equipment for the Noise Figure Analyzer adjustment procedures. When performing the performance test manually any recommended equipment that meets the critical specifications given in the table can be substituted for the recommended model when manually testing.
  • Page 27 Preparing for Calibration and Performance Verification Test Recommended Test Equipment Table 1-1 Recommended Test Equipment Equipment description Critical specification for equipment Recommended substitution model Ω 3.5mm Calibration Kit 85052D Impedance: 50 Frequency Band: 3 GHz to 26.5 GHz UUT: N8974A and N8975A Synthesized Sweeper Frequency Range: 10 MHz to 26.5 GHz 83620/30/40/50B...
  • Page 28 Preparing for Calibration and Performance Verification Test Recommended Test Equipment Table 1-2 Recommended Accessories, Adaptors and Cables Equipment description Critical specification for equipment Recommended substitution model BNC Lead (X 2) Length 122 cm (48 in.), Frequency 10 MHz 10503A Cable 50 Type N (M to M) 11500C Frequency Band: 3 GHz to 26.5 GHz...
  • Page 29 Preparing for Calibration and Performance Verification Test Recommended Test Equipment Table 1-3 Recommended Torque Settings Type Description Precision 12 lb-in (136 N-cm.) Precision 8 lb-in (90 N-cm) 3.5mm 5 lb-in (56 N-cm) Use the SMA wrench to connect male SMA connectors to female precision 3.5min connectors. Connections of male precision 3.5mm.

  • Page 30: Performance Verification And Adjustment Procedures

    Preparing for Calibration and Performance Verification Test Performance Verification and Adjustment Procedures Performance Verification and Adjustment Procedures To perform a calibration run, the performance verification tests listed in Table 1-4 below must be completed. If any of the performance verification tests fail, perform the corresponding calibration adjustment listed in Table 1-4.

  • Page 31: Test Descriptions

    Test Descriptions This chapter descibes each test required for calibration and performance verification.

  • Page 32: 10 Mhz Out Frequency Reference Accuracy

    Test Descriptions 10 MHz Out Frequency Reference Accuracy 10 MHz Out Frequency Reference Accuracy Test Description The test applies to NFAs with either the standard 10 MHz frequency reference or 10 MHz precision frequency reference (Option 1D5). The test measures both the frequency reference accuracy and the ability to set the timebase.

  • Page 33: Required Test Equipment

    Test Descriptions 10 MHz Out Frequency Reference Accuracy Required Test Equipment Table 2-1 10 MHz Out Frequency Reference Accuracy Test Equipment Equipment description Critical specification for equipment Recommended model substitution Universal Counter Time Interval Range: 25ms to 100ms 53132A Single Operation Range: +2.5 to -2.5Vdc Frequency Standard Frequency: 10 MHz Timebase Accuracy 5071A...

  • Page 34: Test Procedure

    Test Descriptions 10 MHz Out Frequency Reference Accuracy Test Procedure NOTE The NFA must be on and in internal frequency mode for at least 1 hour before you start the test. NOTE Throughout the 10 MHz Out Frequency Reference Accuracy Test Procedure the term ‘the Worksheet’...
  • Page 35 Test Descriptions 10 MHz Out Frequency Reference Accuracy 8. On Channel 1, press until Auto Trig is displayed. Trigger/Sensitivity 9. Use the arrow keys ( ) to toggle to Off. —> 10. Press Freq Ratio Step 5. When the Universal Counter reading has stabilized, record the reading in the Worksheet as Counter Reading 1 with 0.1 Hz resolution.
  • Page 36 Test Descriptions 10 MHz Out Frequency Reference Accuracy Step 13. Compare the Positive Frequency Change and Negative Frequency Change values recorded in the Worksheet and record the largest value in the Worksheet as the Maximum Frequency Change. Step 14. Divide the Maximum Frequency Change by 2 (Maximum Frequency Change/2) and record the result as the settability in the Worksheet.
  • Page 37 Test Descriptions 10 MHz Out Frequency Reference Accuracy Table 2-2 10 MHz Out Frequency Reference Accuracy Test Worksheet Description Calculations Measurement Counter Reading 1 Reading ________________Hz Counter Reading 2 Reading ________________Hz Counter Reading 3 Reading ________________Hz Positive Frequency Change = Counter Reading 2 - Counter Reading 1 ________________Hz Negative Frequency Change =...

  • Page 38: 10 Mhz Out Frequency Reference Adjustment

    Test Descriptions 10 MHz Out Frequency Reference Adjustment 10 MHz Out Frequency Reference Adjustment Test Description The adjustment applies to NFAs with both the standard 10 MHz frequency reference and 10 MHz precision frequency reference (Option 1D5). The adjustment is performed by calculating the actual frequency error in Hertz from Counter Reading 1 given in the 10 MHz Reference Accuracy Test (see page 12).

  • Page 39: Test Setup

    Test Descriptions 10 MHz Out Frequency Reference Adjustment Test Setup Before starting the 10 MHz Out Frequency Reference Adjustment, connect the equipment as shown in Figure 2-2. Figure 2-2 10 MHz Out Frequency Reference Adjustment Test Setup BNC Cable NOISE FIGURE 10 MHz FREQUENCY ANALYZER...
  • Page 40 Test Descriptions 10 MHz Out Frequency Reference Adjustment Step 1. Note Counter Reading 1 for the 10 MHz Reference Accuracy Test and calculate the actual error in Hertz. Actual Error = 10 MHz - Counter Reading 1 Step 2. With the actual error calculated, determine which DAC setting to adjust from the table below.
  • Page 41 Test Descriptions 10 MHz Out Frequency Reference Adjustment Step 4. Wait for the frequency counter reading to stabilize and ensure that the adjusted value is within the published specification. Repeat the adjustment procedure until the correct value is obtained. Step 5. Press from the sub-menu to ensure that the values are Save...

  • Page 42: Input Vswr

    Test Descriptions Input VSWR Input VSWR Test Description The Input VSWR test measures the worst case VSWR over each of the specified frequency bands detailed in the Table 2-1 on page 22. The test measures VSWR directly from the Network Analyzer, however the conversion below can be used if measuring return loss.
  • Page 43 Test Descriptions Input VSWR Table 2-5 VSWR Frequency Test Bands N8972A N8973A N8974A N8975A PART 5 • • • TEST VSWR 1500 MHz -3000 MHz PART 6 • • CAL VNA 3.0 GHz - 6.7 OR 26.5 GHz PART 7 •...

  • Page 44: Vswr Test Specification

    Test Descriptions Input VSWR VSWR Test Specification N8972A N8973A N8974A N8975A 10 MHz to 500 MHz < 1.6:1 < 1.6:1 < 1.6:1 < 1.6:1 500 MHz to 1000 MHz < 1.8:1 < 1.8:1 < 1.8:1 < 1.8:1 1000 MHz to 1500 MHz <...
  • Page 45 Test Descriptions Input VSWR Table 2-6 Test Equipment required for Input VSWR test Equipment description Critical specification for Recommended model equipment substitution Ω 3.5mm Calibration Kit 85033D Impedance: 50 Frequency Band: 10 MHz to 3 GHz UUT: N8974A and N8975A Ω...

  • Page 46: Test Setup

    Test Descriptions Input VSWR Test Setup Figure 2-3 Input VSWR: Equipment Connection VECTOR NETWORK ANALYZER 1 Adapter 2 (if Applicable) Port 1 Adapter 1 (if Applicable) Cable 1 Test Procedure NOTE Throughout the Input VSWR Test Procedure the term ‘the Test Record’ refers to the Input VSWR Test Record detailed in the relevant Appendix for the model number being tested.
  • Page 47 Test Descriptions Input VSWR 8. Measuring VSWR from 6700 MHz to 26500 MHz Calibrating the Vector Network Analyzer 1 from 10 MHz to 1.5 GHz or 3 GHz Step 1. Press the key on the Network Analyzer. Preset Step 2. Set the Active Channel to 1 (press Chan 1 Step 3.
  • Page 48 Test Descriptions Input VSWR Figure 2-4 Input VSWR Test Setup 1 VECTOR NETWORK ANALYZER 1 NOISE FIGURE ANALYZER Port 1 Input Adapter 1 Adapter 2 (if Applicable) (if Applicable) Cable 1 Step 9. Select the relevant calibration kit in use from the Cal menu, as the calibration kit selection is dependant on the NFA being tested (press the key, selection and...
  • Page 49 Test Descriptions Input VSWR Measuring VSWR from 10 MHz to 500 MHz Step 1. Connect the test equipment as shown in Figure 2-4 on page 28. Step 2. Set the Network Analyzer Start/Stop frequencies from 10 MHz to 500 MHz. Press the key then then press the...
  • Page 50 Test Descriptions Input VSWR Measuring VSWR from 500 MHz to 1000 MHz Step 1. Connect the test equipment as shown in Figure 2-4 on page 28. Step 2. Set the Network Analyzer Start/Stop frequencies from 500 MHz to 1000 MHz. Press the key and then then press the...
  • Page 51 Test Descriptions Input VSWR Measuring VSWR from 1000 MHz to 1500 MHz Step 1. Connect the test equipment as shown in Figure 2-4 on page 28. Step 2. Set the Network Analyzer Start/Stop frequencies from 1000 MHz to 1500 MHz. Press the key and then then press the...
  • Page 52 Test Descriptions Input VSWR Measuring VSWR from 1500 MHz to 3000 MHz Step 1. Connect the test equipment as shown in Figure 2-4 on page 28. Step 2. Set the Network Analyzer Start/Stop frequencies from 1.5 GHz to 3.0 GHz. Press the key then then the...
  • Page 53 Test Descriptions Input VSWR Calibrating the Vector Network Analyzer 2 from 3 GHz to 6.7 GHz or 26.5 GHz Step 1. Press the key on the Vector Network Analyzer. Preset Step 2. Set the Active Channel to 1 (press Chan 1 Step 3.
  • Page 54 Test Descriptions Input VSWR Figure 2-5 Vector Network Analyzer: Adaptor Connection VECTOR NETWORK ANALYZER 2 Adapter 3 Port 1 uWave Cable Step 9. As the calibration kit selection is dependant on the NFA being tested, select the relevant calibration kit in use from the Cal menu (press the key, selection and Calibration Kit...
  • Page 55 Test Descriptions Input VSWR Measuring Input VSWR from 3000 MHz to 6700 MHz Figure 2-6 Input VSWR Test Setup 2 VECTOR NETWORK ANALYZER 2 NOISE FIGURE ANALYZER Input Port 1 Adapter 3 uWave Cable Step 1. Connect the test equipment as shown in Figure 2-6 on page 35. Step 2.
  • Page 56 Test Descriptions Input VSWR Measuring Input VSWR from 6700 MHz to 20000 MHz Step 1. Connect the test equipment as shown in Figure 2-6 on page 35. Step 2. Set the Network Analyzer Start/Stop to measure the DUT’s input VSWR from 6700 MHz to 20000 MHz.
  • Page 57 Test Descriptions Input VSWR Measuring Input VSWR from 20000 MHz to 26500 MHz Step 1. Connect the test equipment as shown in Figure 2-6 on page 35. Step 2. Set the Network Analyzer Start/Stop to measure the DUT’s input VSWR from 20000 MHz to 26500 MHz.

  • Page 58: Frequency Accuracy

    Test Descriptions Frequency Accuracy Frequency Accuracy Test Description The NFA filter shape is asymmetrical. The center frequency is defined at the half power level under the curve. The frequency accuracy tests are performed by measuring selected P points along the filter curvature. The half power value of the P measurements is then calculated.

  • Page 59: Related Adjustment

    Test Descriptions Frequency Accuracy Related Adjustment None Required Test Equipment Table 2-7 Equipment required for Frequency Accuracy test Equipment description Critical specification for equipment Recommended model substitution Synthesized Sweeper Frequency Range: 10 MHz to 26.5 GHz 83620/30/40/50B Option (see note) 001 and 008 Frequency Accuracy (CW): 0.02% Power Level Range: -55dBm...

  • Page 60: Test Setup

    Test Descriptions Frequency Accuracy Test Setup Figure 2-7 Frequency Accuracy test setup BNC Cable SYNTHESIZED NOISE FIGURE FREQUENCY SWEEPER Ref In ANALYZER Ref In STANDARD 10 MHz Input RF Output Adapter 2 Adapter 1 RF Cable Test Procedure NOTE Throughout the Frequency Accuracy Test Procedure the term ‘the Worksheet’...
  • Page 61 Test Descriptions Frequency Accuracy Step 3. Set the NFA as follows: 1. On the NFA ensure that the preset is set to the factory settings (press key and System More Power On/Preset Power On (Preset) Preset (Factory) 2. Press the key and wait for the preset routine to complete.
  • Page 62 Test Descriptions Frequency Accuracy Step 9. Once the single sweep is complete set the NFA to autorange (press the key and Scale Autoscale Step 10. Before obtaining the P measurements and performing the calculations ensure that the filter shape is similar to the one relating to the bandwidth in Figure 2-8 and Figure 2-9.
  • Page 63 Test Descriptions Frequency Accuracy Figure 2-8 Typical 4 MHz bandwidth filter shape Figure 2-9 Typical 100 KHz bandwidth filter shape Chapter 2...
  • Page 64 Test Descriptions Frequency Accuracy Step 12. Perform the frequency accuracy calculations either using a spreadsheet ® such as Microsoft Excel (see page 49), or manually (see page 50). Step 13. Repeat steps 4 to 12 above for the remaining frequencies, spans and bandwidths as listed in the data into the Test Record.
  • Page 65 Test Descriptions Frequency Accuracy Table 2-8 Frequency Accuracy Test Worksheet Frequency Summed Frequency Summed Frequency Summed (MHz) Phot (MHz) Phot reading (MHz) Phot reading reading Equation 1 Equation 1 Equation 1 Chapter 2...
  • Page 66 Test Descriptions Frequency Accuracy Table 2-8 Frequency Accuracy Test Worksheet Frequency Summed Frequency Summed Frequency Summed (MHz) Phot (MHz) Phot reading (MHz) Phot reading reading Equation 1 Equation 1 Equation 1 Chapter 2...
  • Page 67 Test Descriptions Frequency Accuracy Table 2-8 Frequency Accuracy Test Worksheet Frequency Summed Frequency Summed Frequency Summed (MHz) Phot (MHz) Phot reading (MHz) Phot reading reading Equation 1 Equation 1 Equation 1 Chapter 2...
  • Page 68 Test Descriptions Frequency Accuracy Table 2-8 Frequency Accuracy Test Worksheet Frequency Summed Frequency Summed Frequency Summed (MHz) Phot (MHz) Phot reading (MHz) Phot reading reading Equation 1 Equation 1 Equation 1 Center Frequency: _______ MHz Bandwidth: _______ MHz Span: _______ MHz Equation: Power = Summed Phot reading 201/2 Power = ____________WattHz...
  • Page 69 Test Descriptions Frequency Accuracy Performing the frequency accuracy calculations using the CSV file in a spreadsheet The following procedure uses Microsoft Excel. Step 1. Open Excel. Step 2. Open the .csv file from the A: drive. From the menu select File Open (A:).
  • Page 70 Test Descriptions Frequency Accuracy Step 6. Use Cells D1 to D201 as a look up reference and find the cell, which closest matches the ½ Power Reading in cell D202. The corresponding frequency in Column A is given as the center frequency point.
  • Page 71 Test Descriptions Frequency Accuracy Figure 2-12 Example 2-2 summed P for reading 1 to reading 6 Step 2. Calculate the half power level from the data as shown in Figure 2-12. Equation: ½ Power = Summed P Reading 201 / 2 Step 3.

  • Page 72: Noise Source Supply Accuracy

    Test Descriptions Noise Source Supply Accuracy Noise Source Supply Accuracy Test Description The Noise Source Supply Accuracy test verifies that the noise source drive supply meets the published specifications. A Digital Multimeter is connected to the +28V noise source supply BNC connection. The supply is then tested in the on and off states.

  • Page 73: Test Setup

    Test Descriptions Noise Source Supply Accuracy Test Setup Figure 2-13 Equipment setup for Noise Source Supply Accuracy test DIGITAL MULTIMETER NOISE FIGURE ANALYZER +28V Noise Source Supply BNC Cable Adapter on (2 Wire) HI/LO Test Procedure NOTE Throughout the Noise Source Supply Accuracy Test Procedure the term ‘the Test Record’...
  • Page 74 Test Descriptions Noise Source Supply Accuracy Step 8. Set the noise source on (press the key, then System More More . Press ). Press then enter the Service Noise Source On Enter Password service password -2010. Press then Enter Service Noise Source On Step 9.

  • Page 75: Noise Figure Range And Accuracy

    Test Descriptions Noise Figure Range and Accuracy Noise Figure Range and Accuracy Test Description A precision step attenuator, calibrated at 50 MHz with an accuracy of 0.010dB, is used as an external standard to measure the NFA’s Noise Figure Range and Accuracy over a 22dB range. The results are then used to determine the Instrument Uncertainty for the given ENR values over their respective measurement ranges.

  • Page 76: Related Adjustment

    Test Descriptions Noise Figure Range and Accuracy Related Adjustment None Required Test Equipment Table 2-12 Noise Figure Range and Accuracy test equipment Equipment description Critical specification for equipment Recommended model substitution Synthesized Sweeper Frequency Range: 50 MHz 83620/30/40/50B Option 001 and 008 Frequency Accuracy (CW): 0.02% Power Level Range: -54dBm to -65dBm Attenuator/Switch Driver...

  • Page 77: Test Setup

    Test Descriptions Noise Figure Range and Accuracy Test Setup Figure 2-14 Equipment required for Noise Figure Range and Accuracy test SYNTHESIZED NOISE FIGURE SWEEPER ANALYZER ATTENUATOR SWITCH DRIVER Input PRECISION 1dB Control Adapter 1 Adapter 2 STEP ATTENUATOR Cable Attenuator X RF Cable RF Cable Test Procedure...
  • Page 78 Test Descriptions Noise Figure Range and Accuracy Step 3. Set the Switch Driver as follows: 1. Ensure the LED is on. LOCAL 2. Set the attenuator to 0dB. The settings are as follows: Table 2-13 Switch Driver Attenuator Settings (1 = LED On, 0 = LED Off) Attenuator X 1dB Step Attenuator Step 4.
  • Page 79 Test Descriptions Noise Figure Range and Accuracy 6. Set the frequency to 50 MHz (press the key and Frequency/Points Fixed Freq 7. Set the averaging to 101 (press the key and Averaging/Bandwidth Average Mode (Point) Averages Enter Averaging On 8. Select the display to meter mode (press the key and Format Format...
  • Page 80 Test Descriptions Noise Figure Range and Accuracy Step 15. Use the Actual and Measured attenuations given in the Worksheet to calculate the Actual and Measured Noise Figures in the Test Record. Step 16. Calculate the Noise Figure Instrument Uncertainty Error for each ENR measurement range detailed in the relevant model number tables in Appendices A through D.
  • Page 81 Test Descriptions Noise Figure Range and Accuracy Table 2-14 Noise Figure Range and Accuracy Test Worksheet Attenuator Input Measured Range Actual Measured Step Size (dB) Level Phot (dB) (dB) Attenuation (dB) Attenuation (dB) (dBm) Equation 1 Equation 2 -54 Ref 1 Ref 1 Ref 1 Ref 1...
  • Page 82 Test Descriptions Noise Figure Range and Accuracy Table 2-14 Noise Figure Range and Accuracy Test Worksheet Attenuator Input Measured Range Actual Measured Step Size (dB) Level Phot (dB) (dB) Attenuation (dB) Attenuation (dB) (dBm) Equation 1 Equation 2 Range 0.125 = Metrology Data at 1dB / 8 Equation 1...
  • Page 83 Test Descriptions Noise Figure Range and Accuracy Table 2-15 4.5-6.5 dB Noise Source ENR Test Record Actual NF range 5 dB ENR - 10LOG (10^ (Actual Attenuation /10) -1) Measured NF range 5 dB ENR - 10LOG (10^ (Measured Attenuation /10) -1) Instrumentation Uncertainty: Actual NF - Measured NF...

  • Page 84: Gain Measurement Uncertainty

    Test Descriptions Gain Measurement Uncertainty Gain Measurement Uncertainty NOTE You must perform the Noise Figure Range and Accuracy performance test (see page 55) before this test. Test Description The NFA uses internal IF attenuator values for measuring gain. The test comprises of an internal IF attenuator calibration.

  • Page 85: Test Specification

    Test Descriptions Gain Measurement Uncertainty Figure 2-15 Typical Instrumentation Uncertainty for the range 30 to 70dB Test Specification Gain Measurement Uncertainty Range: -20 to >+40dB Instrumentation Uncertainty: ±< 0.17dB Related Adjustment None Chapter 2...

  • Page 86: Required Test Equipment

    Test Descriptions Gain Measurement Uncertainty Required Test Equipment Table 2-18 Equipment required for Gain Measurement Uncertainty test Equipment description Critical specification for equipment Recommended model substitution Synthesized Sweeper Frequency Range: 50 MHz 83620/30/40/50B Option 001 and 008 Frequency Accuracy (CW): 0.02% Power Level Range: -46 dBm Adapter 1 N8972/3A N Type (M) to 3.5mm (F)

  • Page 87: Test Procedure

    Test Descriptions Gain Measurement Uncertainty Test Procedure NOTE Throughout the Gain Measurement Uncertainty Test Procedure the term ‘the Worksheet’ refers to the Gain Measurement Uncertainty Test Worksheet 1 on page 69 or Worksheet 2 on page 71, and the term ‘the Test Record’...
  • Page 88 Test Descriptions Gain Measurement Uncertainty Step 7. Convert the delta ratios to dB error values using 10*LOG (Delta reading from index 1 to 71). Enter the value in the Worksheet No. 1. Example: Index 16 = 1.004545 = 10 * LOG (1.004545) = 0.019694dB Step 8.
  • Page 89 Test Descriptions Gain Measurement Uncertainty Table 2-19 Gain Measurement Uncertainty Worksheet 1 Index Delta Ratio Error (dB) Index Delta Ratio Error (dB) Chapter 2...
  • Page 90 Test Descriptions Gain Measurement Uncertainty Table 2-19 Gain Measurement Uncertainty Worksheet 1 Index Delta Ratio Error (dB) Index Delta Ratio Error (dB) Chapter 2...
  • Page 91 Test Descriptions Gain Measurement Uncertainty Table 2-20 Gain Measurement Uncertainty Worksheet 2 Index Range Measured Range Peak-Peak (dB) Instrumentation Uncertainty (dB) 1 - 41 0 - 40 2 - 42 1 - 41 3 - 43 2 - 42 4 - 44 3 - 43 5 - 45 4 - 44...
  • Page 92 Test Descriptions Gain Measurement Uncertainty Table 2-20 Gain Measurement Uncertainty Worksheet 2 Index Range Measured Range Peak-Peak (dB) Instrumentation Uncertainty (dB) 23 - 63 22 - 62 24 - 64 23 - 63 25 - 65 24 - 64 26 - 66 25 - 65 27 - 67 26 - 66...

  • Page 93: Instrument Noise Figure

    Test Descriptions Instrument Noise Figure Instrument Noise Figure Test Description A noise source is connected to the NFA’s input. The instrument then measures its own uncorrected noise figure. For test purposes the NFA is tested at the most accurate 20-26°C performance specification. Test Specification N8972A 10 MHz to <...
  • Page 94 Test Descriptions Instrument Noise Figure Specifications covering the frequency range of 10MHz to <3000 MHz are NOTE referenced to 0 MHz. To calculate the specification for any given frequency point within this range simply multiply the frequency by the corresponding dB/MHz value and add the initial dB value. For example: Frequency = 1500 MHz Specification = 1500 * 0.00135 + 5.9dB = <7.925 dB...
  • Page 95 Test Descriptions Instrument Noise Figure Figure 2-18 Typical plots with limit lines for the N8973A Figure 2-19 Typical plots with limit lines for the N8974A Chapter 2...

  • Page 96: Related Adjustment

    Test Descriptions Instrument Noise Figure Figure 2-20 Typical plots with limit lines for the N8975A Related Adjustment None Required Test Equipment Table 2-21 Required equipment for Instrument Noise Figure Test Equipment description Critical specification for equipment Recommended model substitution Noise source Frequency Range: 10 MHz to 3 GHz 346A standard or Option Typical ENR: 4.5 - 6.5 dB...

  • Page 97: Test Setup

    Test Descriptions Instrument Noise Figure Table 2-21 Required equipment for Instrument Noise Figure Test Equipment description Critical specification for equipment Recommended model substitution Adapter 3.5 mm Precision (F) to 3.5 mm (F) 83059B BNC Lead Length 122 cm (48 in.), Frequency 10503A 10 MHz Equipment selection for this test is dependant on the model number of...

  • Page 98: Test Procedure

    NFA’s internal memory (C:). Alternatively, create an ENR file from the data supplied on the noise source label (refer to the Noise Figure Anaylzers NFA Series User’s Guide for more details). Do not calibrate the source. The NFA should display in the active window.
  • Page 99 Test Descriptions Instrument Noise Figure 6. Set the stop frequency dependant on the NFA’s upper frequency range. For the N8972A set the stop frequency to 1.5 GHz (press Stop For the N8973A set the stop frequency to 3.0 GHz (press Stop For the N8974A set the stop frequency to 6.7 GHz (press Stop...
  • Page 100 Test Descriptions Instrument Noise Figure Figure 2-22 Specification limit line setup for N8972A Figure 2-23 Specification limit line setup for N8973A Chapter 2...
  • Page 101 Test Descriptions Instrument Noise Figure Figure 2-24 Specification limit line setup for N8974A Figure 2-25 Specification limit line setup for N8975A key and then 4. Display the limit line on the screen (press <—Prev Display On Chapter 2...
  • Page 102 Test Descriptions Instrument Noise Figure Step 10. Ensure the trace is below the limit line and enter the overall pass/fail result within the Test Record. Step 11. Complete the Test Record by entering values at fixed frequency points on the trace. These values are purely for reference to the historical data, alternatively the screen could be saved to disk and archived, printed etc.

  • Page 103: Measurement Jitter

    Test Descriptions Measurement Jitter Measurement Jitter Test Description A noise source is connected to the NFA’s input. The Analyzer then measures linear Y-Factor over 100 samples. The standard deviation is then calculated using the "non-biased" or "n-1" method. STDEV uses the following formula: ∑...
  • Page 104 Test Descriptions Measurement Jitter Required Test Equipment Table 2-22 Required equipment for Instrument Measurement Jitter Test Equipment description Critical specification for equipment Recommended model substitution Noise source Frequency Range: 1 GHz 346A Standard or option Typical ENR: 4 - 7dB Connection: 3.5 mm(M) or N Type(M) Adapter 3.5 mm Precision (F) to 3.5 mm(F)
  • Page 105 Step 4. Load the noise source diskette (A:) or from the NFA’s internal memory (C:). Alternatively, create an ENR file from the data supplied on the noise source label (refer to the Noise Figure Anaylzers NFA Series User’s Guide) for more details). Do not calibrate the source. The NFA should display in the active window.
  • Page 106 Test Descriptions Measurement Jitter ∑  ∑  –   σ ---------------------------------------- - Equation 2-3 n n 1 – where n = number of samples, ∑ = sum, x = measured values Using an example result of approximately 2.5, the standard deviation can be calculated as follows.
  • Page 107 Test Descriptions Measurement Jitter Step 9. Convert the linear standard deviation to Log using 10 * LOG (1+ standard deviation to give the standard deviation for Y-Factor results with no Averaging. Enter the result into the Test Record ensuring that the measured value is within its published specification.
  • Page 108 Test Descriptions Measurement Jitter Chapter 2...
  • Page 109 Technical Specifications Specifications apply over 0° C to +55° C unless otherwise stated. The Noise Figure Analyzer meets specification after 2 hours storage within the operating temperature range, 1 hour after the analyzer is turned on with ALIGNMENT running.
  • Page 110 Technical Specifications Frequency Frequency N8972A 10 MHz to 1.5 GHz Frequency Range N8973A 10 MHz to 3 GHz N8974A 10 MHz to 6.7 GHz N8975A 10 MHz to 26.5 GHz Measurement N8972A 4 MHz Bandwidth N8973/4/5A 4 MHz, 2 MHz, 1 MHz, 400 KHz, 200 KHz, 100 KHz (nominal) Frequency Reference...
  • Page 111 Technical Specifications Frequency Tuning Accuracy (Start, Stop, Centre, Marker) Frequency (MHz) Temperature (0 C - 55 At measurement bandwidth of 4 MHz 10 - 3000 ± Reference error + 100 kHz > 3000 - 26500 ± Reference error + 400 kHz At measurement bandwidth of <...

  • Page 112: Noise Figure And Gain

    Technical Specifications Noise Figure and Gain Noise Figure and Gain Performance is dependent on the ENR of the noise source used: N8972A Noise Source ENR 4 - 7 dB 12 - 17 dB 20 - 22 dB Noise Figure Measurement Range 0 to 20 dB 0 to 30 dB 0 to 35 dB...
  • Page 113 Technical Specifications Noise Figure and Gain N8974A, N8975A (< 3.0 GHz) Noise Source ENR 4 - 7 dB 12 - 17 dB 20 - 22 dB Noise Figure Measurement Range 0 to 20 dB 0 to 30 dB 0 to 35 dB Instrument Uncertainty ±...
  • Page 114 Technical Specifications Noise Figure and Gain Instrument’s own Noise Figure Frequency Noise Figure Noise Figure over a limited temperature range of 23 C ± 3 < 4.9 dB < 4.4 dB + (0.0025 * freq in MHz) 10 MHz to < 500 MHz + (0.0025 * freq in MHz) <...
  • Page 115 Technical Specifications Noise Figure and Gain Figure 3-2 Characteristic Noise Figure at 23°C ± 3°C (3.0 GHz to 26.5 GHz) Max external gain >65 dB between noise source output and RF input Up to 999 measurement results Averaging Jitter Jitter with no averaging 5 dB Y-factor standard deviation <0.15 dB 1.

  • Page 116: Rf Input

    Technical Specifications RF Input RF Input N8972/3A N female, 50Ω nominal Connector N8974/5A APC 3.5 mm, 50Ω nominal (ESD sensitive) SWR (50 Ω reference) 10 MHz 500 MHz 1.0 GHz 1.5 GHz 3.0 GHz 6.7 GHz 20.0 GHz 500 MHz 1.0 GHz 1.5 GHz 3.0 GHz...
  • Page 117 Technical Specifications RF Input Figure 3-4 Characteristic SWR at 23° C (3.0 GHz to 26.5 GHz) -10 dBm Maximum Operating Input Note that this is the total wide-band noise power. Contributing factors Power are: Noise source ENR, external gain, noise figure, and bandwidth (including DUT).
  • Page 118 Technical Specifications Measurement Measurement Sweep Number of points 2 to 401, or fixed frequency Setting Start/Stop, Center/Span, Frequency list of up to 401 points Sweep trigger Continuous or Single Measurement Speed (nominal) 8 averages 64 averages < 100 ms/measurement < 80 ms/measurement N8972A <...
  • Page 119 Technical Specifications Measurement Modes Amplifier Downconverter in DUT With fixed or variable IF Instrument can control an external LO via dedicated ’LO GPIB’ connector Upconverter in DUT With fixed or variable IF Instrument can control an external LO via dedicated ’LO GPIB’ connector System downconverter Allows the use of an external downconverting mixer as part of the measurement system.

  • Page 120: Display

    Technical Specifications Display Display 17cm color LCD panel Type Graphical, table of values, or meter mode Output format Display channels Number of markers Limit lines Upper and lower for each of 2 channels Display units Noise figure Noise figure (F dB), or as a ratio (F) Gain Gain (G dB), or as a ratio (G) Y-factor...

  • Page 121: Connectivity

    Technical Specifications Connectivity Connectivity General GPIB IEEE-488 bus connector LO GPIB IEEE-488 bus connector dedicated to local oscillator control (SCPI or custom command set) Serial RS-232, 9-pin D-SUB male Printer 25-pin parallel D-Sub female, for connection with IEEE 1284 cable to a PCL3 or PCL5 compatible printer VGA Output 15-pin mini D-SUB female...

  • Page 122: General Specifications

    Technical Specifications General Specifications General Specifications Internal drive: 30 traces, states or ENR tables Data Storage (nominal) Floppy disk: 30 traces, states or ENR tables On (line 1): 90 to 132 V rms, 47 to 440 Hz Power Requirements 195 to 250 V rms, 47 to 66 Hz Power consumption <300 W Standby (line 0): <5 W Dimensions...
  • Page 123 Technical Specifications General Specifications This product conforms with the protection requirements of European Electromagnetic Compatibility Council Directive 89/336/EEC for Electromagnetic Compatibility (EMC). The conformity assessment requirements have been met using the technical Construction file route to compliance, using EMC test specifications EN 55011:1991 (Group 1, Class A) and EN 50082-1:1992.
  • Page 124 Technical Specifications General Specifications Chapter 3...
  • Page 125 Model N8972A: Test Records This appendix provides test records for you to photocopy and use when working through each calibration and performance verification test on model N8972A.

  • Page 126: Mhz Out Frequency Reference Accuracy Test Record

    Model N8972A: Test Records 10MHz Out Frequency Reference Accuracy Test Record 10MHz Out Frequency Reference Accuracy Test Record Standard results: Description Measured Frequency (Hz) Specification (Hz) Pass/Fail Frequency Accuracy ± 20Hz Settability ± 5Hz Option 1D5 results: Description Measured Frequency (Hz) Specification (Hz) Pass/Fail Frequency Reference...

  • Page 127: Input Vswr Test Record

    Model N8972A: Test Records Input VSWR Test Record Input VSWR Test Record Measured Frequency Frequency at Maximum Specification Pass/Fail Range Max Measured Measured VSWR VSWR ≤ 1.6:1 10MHz to 500MHz ≤ 1.8:1 500MHz to 1000MHz ≤ 1.9:1 1000MHz to 1500MHz Appendix A...

  • Page 128: Frequency Accuracy Test Record

    Model N8972A: Test Records Frequency Accuracy Test Record Frequency Accuracy Test Record Frequency Frequency Selected Resolution Measured Specification Pass/Fail (MHz) Span Bandwidth (MHz) Center (MHz) (MHz) Frequency (MHz) 14.00 8.00 4.00 ± 10 kHz ± 100 kHz + x 30.00 8.00 4.00 ±...

  • Page 129: Noise Source Supply Accuracy Test Record

    Model N8972A: Test Records Noise Source Supply Accuracy Test Record Noise Source Supply Accuracy Test Record Noise Source Supply Measured Voltage (V) Specification (V) Pass/Fail < 1.0 V < ± 0.1V Appendix A...

  • Page 130: Noise Figure Range And Accuracy Test Record

    Model N8972A: Test Records Noise Figure Range and Accuracy Test Record Noise Figure Range and Accuracy Test Record Results: 4.5 - 6.5dB Noise Source ENR Input Range Actual Measured Noise Figure Instrument Specification Pass/ Level (dB) NF (dB) NF (dB) Measurement Uncertainty (dB)

  • Page 131: Results: 14 - 17Db Noise Source Enr

    Model N8972A: Test Records Noise Figure Range and Accuracy Test Record Results: 14 - 17dB Noise Source ENR Input Range Actual Measured Noise Figure Instrument Specification Pass/ Level (dB) NF (dB) NF (dB) Measurement Uncertainty (dB) Fail (dBm) Range (dB) (dB) ----- 0.125...

  • Page 132: Results: 20 - 22Db Noise Source Enr

    Model N8972A: Test Records Noise Figure Range and Accuracy Test Record Results: 20 - 22dB Noise Source ENR Input Range Actual Measured Noise Figure Instrument Specification Pass/ Level (dB) NF (dB) NF (dB) Measurement Uncertainty (dB) Fail (dBm) Range (dB) (dB) ----- 0.125...

  • Page 133: Gain Measurement Uncertainty Test Record

    Model N8972A: Test Records Gain Measurement Uncertainty Test Record Gain Measurement Uncertainty Test Record Measurement Worst Pk-Pk Specification (dB) Pass/Fail Range (dB) Instrumentation Uncertainty -20 to > +40 dB ± 0.17dB Appendix A...

  • Page 134: Instrument Noise Figure Test Record

    Model N8972A: Test Records Instrument Noise Figure Test Record Instrument Noise Figure Test Record Frequency (MHz) Instrument Noise Specification (dB) Pass/Fail Figure (dB) 10.00 to 1500 Overall Frequency Test Line Limit Range Result 10.00 < 4.425dB 30.00 < 4.475dB 60.00 <...

  • Page 135: Measurement Jitter Test Record

    Model N8972A: Test Records Measurement Jitter Test Record Measurement Jitter Test Record Frequency (MHz) Standard Deviation Specification (dB) Pass/Fail (dB) 1000 < 0.15dB Appendix A...
  • Page 136 Model N8972A: Test Records Measurement Jitter Test Record Appendix A...
  • Page 137 Model N8973A: Test Records This appendix provides test records for you to photocopy and use when working through each calibration and performance verification test on model N8973A.

  • Page 138: Mhz Out Frequency Reference Accuracy Test Record

    Model N8973A: Test Records 10MHz Out Frequency Reference Accuracy Test Record 10MHz Out Frequency Reference Accuracy Test Record Standard results: Description Measured Frequency (Hz) Specification (Hz) Pass/Fail Frequency Accuracy ± 20Hz Settability ± 5Hz Option 1D5 results: Description Measured Frequency (Hz) Specification (Hz) Pass/Fail Frequency Reference...

  • Page 139: Input Vswr Test Record

    Model N8973A: Test Records Input VSWR Test Record Input VSWR Test Record Measured Frequency Frequency at Maximum Specification Pass/Fail Range Max Measured Measured VSWR VSWR ≤ 1.6:1 10MHz to 500MHz ≤ 1.8:1 500MHz to 1000MHz ≤ 1.9:1 1000MHz to 1500MHz ≤...

  • Page 140: Frequency Accuracy Test Record

    Model N8973A: Test Records Frequency Accuracy Test Record Frequency Accuracy Test Record Frequency Frequency Selected Resolution Measured Specification Pass/Fail (MHz) Span Bandwidth (MHz) Center (MHz) (MHz) Frequency (MHz) 14.00 8.00 4.00 ± 10 kHz ± 100 kHz + x 30.00 8.00 4.00 ±...

  • Page 141: Noise Source Supply Accuracy Test Record

    Model N8973A: Test Records Noise Source Supply Accuracy Test Record Noise Source Supply Accuracy Test Record Noise Source Supply Measured Voltage (V) Specification (V) Pass/Fail < 1.0 V < ± 0.1V Appendix B...

  • Page 142: Noise Figure Range And Accuracy Test Record

    Model N8973A: Test Records Noise Figure Range and Accuracy Test Record Noise Figure Range and Accuracy Test Record Results: 4.5 - 6.5dB Noise Source ENR Input Range Actual Measured Noise Figure Instrument Specification Pass/ Level (dB) NF (dB) NF (dB) Measurement Uncertainty (dB)

  • Page 143: Results: 14 - 17Db Noise Source Enr

    Model N8973A: Test Records Noise Figure Range and Accuracy Test Record Results: 14 - 17dB Noise Source ENR Input Range Actual Measured Noise Figure Instrument Specification Pass Level (dB) NF (dB) NF (dB) Measurement Uncertainty (dB) /Fail (dBm) Range (dB) (dB) ----- 0.125...

  • Page 144: Results: 20 - 22Db Noise Source Enr

    Model N8973A: Test Records Noise Figure Range and Accuracy Test Record Results: 20 - 22dB Noise Source ENR Input Range Actual Measured Noise Figure Instrument Specification Pass Level (dB) NF (dB) NF (dB) Measurement Uncertainty (dB) /Fail (dBm) Range (dB) (dB) ----- 0.125...

  • Page 145: Gain Measurement Uncertainty Test Record

    Model N8973A: Test Records Gain Measurement Uncertainty Test Record Gain Measurement Uncertainty Test Record Measurement Worst Pk-Pk Specification (dB) Pass/Fail Range (dB) Instrumentation Uncertainty -20 to > +40 dB ± 0.17dB Appendix B...

  • Page 146: Instrument Noise Figure Test Record

    Model N8973A: Test Records Instrument Noise Figure Test Record Instrument Noise Figure Test Record Frequency (MHz) Instrument Noise Specification (dB) Pass/Fail Figure (dB) 10.00 to 3000 Overall Frequency Test Line Limit Range Result 10.00 < 4.425dB 30.00 < 4.475dB 60.00 <...

  • Page 147: Measurement Jitter Test Record

    Model N8973A: Test Records Measurement Jitter Test Record Measurement Jitter Test Record Frequency (MHz) Standard Deviation Specification (dB) Pass/Fail (dB) 1000 < 0.10dB Appendix B...
  • Page 148 Model N8973A: Test Records Measurement Jitter Test Record Appendix B...
  • Page 149 Model N8974A: Test Records This appendix provides test records for you to photocopy and use when working through each calibration and performance verification test on model N8974A.

  • Page 150: Mhz Out Frequency Reference Accuracy Test Record

    Model N8974A: Test Records 10MHz Out Frequency Reference Accuracy Test Record 10MHz Out Frequency Reference Accuracy Test Record Standard results: Description Measured Frequency (Hz) Specification (Hz) Pass/Fail Frequency Accuracy ± 20Hz Settability ± 5Hz Option 1D5 results: Description Measured Frequency (Hz) Specification (Hz) Pass/Fail Frequency Reference...

  • Page 151: Input Vswr Test Record

    Model N8974A: Test Records Input VSWR Test Record Input VSWR Test Record Measured Frequency Frequency at Maximum Specification Pass/Fail Range Max Measured Measured VSWR VSWR ≤ 1.6:1 10MHz to 500MHz ≤ 1.8:1 500MHz to 1000MHz ≤ 1.9:1 1000MHz to 1500MHz ≤...

  • Page 152: Frequency Accuracy Test Record

    Model N8974A: Test Records Frequency Accuracy Test Record Frequency Accuracy Test Record Frequency Frequency Selected Resolution Measured Specification Pass/Fail (MHz) Span Bandwidth (MHz) Center (MHz) (MHz) Frequency (MHz) 14.00 8.00 4.00 ± 10 kHz ± 100 kHz + x 30.00 8.00 4.00 ±...

  • Page 153: Noise Source Supply Accuracy Test Record

    Model N8974A: Test Records Noise Source Supply Accuracy Test Record Noise Source Supply Accuracy Test Record Noise Source Supply Measured Voltage (V) Specification (V) Pass/Fail < 1.0 V < ± 0.1V Appendix C...

  • Page 154: Noise Figure Range And Accuracy Test Record

    Model N8974A: Test Records Noise Figure Range and Accuracy Test Record Noise Figure Range and Accuracy Test Record Results: 4.5 - 6.5dB Noise Source ENR Input Range Actual Measured Noise Figure Instrument Specification Pass/ Level (dB) NF (dB) NF (dB) Measurement Uncertainty (dB)

  • Page 155: Results: 14 - 17Db Noise Source Enr

    Model N8974A: Test Records Noise Figure Range and Accuracy Test Record Results: 14 - 17dB Noise Source ENR Input Range Actual Measured Noise Figure Instrument Specification Pass/ Level (dB) NF (dB) NF (dB) Measurement Uncertainty (dB) Fail (dBm) Range (dB) (dB) ----- 0.125...

  • Page 156: Results: 20 - 22Db Noise Source Enr

    Model N8974A: Test Records Noise Figure Range and Accuracy Test Record Results: 20 - 22dB Noise Source ENR Input Range Actual Measure Noise Figure Instrument Specification Pass/ Level (dB) NF (dB) d NF Measurement Uncertainty (dB) Fail (dBm) (dB) Range (dB) (dB) ----- 0.125...

  • Page 157: Gain Measurement Uncertainty Test Record

    Model N8974A: Test Records Gain Measurement Uncertainty Test Record Gain Measurement Uncertainty Test Record Measurement Worst Pk-Pk Specification (dB) Pass/Fail Range (dB) Instrumentation Uncertainty -20 to > +40 dB ± 0.17dB Appendix C...

  • Page 158: Instrument Noise Figure Test Record

    Model N8974A: Test Records Instrument Noise Figure Test Record Instrument Noise Figure Test Record Frequency (MHz) Instrument Noise Specification (dB) Pass/Fail Figure (dB) 10.00 to 6700 Overall Frequency Test Line Limit Range Result 10.00 < 4.425dB 30.00 < 4.475dB 60.00 <...

  • Page 159: Measurement Jitter Test Record

    Model N8974A: Test Records Measurement Jitter Test Record Measurement Jitter Test Record Frequency (MHz) Standard Deviation Specification (dB) Pass/Fail (dB) 1000 < 0.10dB Appendix C...
  • Page 160 Model N8974A: Test Records Measurement Jitter Test Record Appendix C...
  • Page 161 Model N8975A: Test Records This appendix provides test records for you to photocopy and use when working through each calibration and performance verification test on model N8975A.

  • Page 162: Mhz Out Frequency Reference Accuracy Test Record

    Model N8975A: Test Records 10MHz Out Frequency Reference Accuracy Test Record 10MHz Out Frequency Reference Accuracy Test Record Standard results: Description Measured Frequency (Hz) Specification (Hz) Pass/Fail Frequency Accuracy ± 20Hz Settability ± 5Hz Option 1D5 results: Description Measured Frequency (Hz) Specification (Hz) Pass/Fail Frequency Reference...

  • Page 163: Input Vswr Test Record

    Model N8975A: Test Records Input VSWR Test Record Input VSWR Test Record Measured Frequency Frequency at Maximum Specification Pass/Fail Range Max Measured Measured VSWR VSWR ≤ 1.6:1 10MHz to 500MHz ≤ 1.8:1 500MHz to 1000MHz ≤ 1.9:1 1000MHz to 1500MHz ≤...

  • Page 164: Frequency Accuracy Test Record

    Model N8975A: Test Records Frequency Accuracy Test Record Frequency Accuracy Test Record Frequency Frequency Selected Resolution Measured Specification Pass/Fail (MHz) Span Bandwidth (MHz) Center (MHz) (MHz) Frequency (MHz) 14.00 8.00 4.00 ± 10 kHz ± 100 kHz + x 30.00 8.00 4.00 ±...
  • Page 165 Model N8975A: Test Records Frequency Accuracy Test Record Frequency Frequency Selected Resolution Measured Specification Pass/Fail (MHz) Span Bandwidth (MHz) Center (MHz) (MHz) Frequency (MHz) 15000.00 8.00 4.00 ± 10 kHz ± 400 kHz + x 16000.00 8.00 4.00 ± 10 kHz ±...

  • Page 166: Noise Source Supply Accuracy Test Record

    Model N8975A: Test Records Noise Source Supply Accuracy Test Record Noise Source Supply Accuracy Test Record Noise Source Supply Measured Voltage (V) Specification (V) Pass/Fail < 1.0 V < ± 0.1V Appendix D...

  • Page 167: Noise Figure Range And Accuracy Test Record

    Model N8975A: Test Records Noise Figure Range and Accuracy Test Record Noise Figure Range and Accuracy Test Record Results: 4.5 - 6.5dB Noise Source ENR Input Range Actual Measured Noise Figure Instrument Specification Pass/ Level (dB) NF (dB) NF (dB) Measurement Uncertainty (dB)

  • Page 168: Results: 14 - 17Db Noise Source Enr

    Model N8975A: Test Records Noise Figure Range and Accuracy Test Record Results: 14 - 17dB Noise Source ENR Input Range Actual Measured Noise Figure Instrument Specification Pass/ Level (dB) NF (dB) NF (dB) Measurement Uncertainty (dB) Fail (dBm) Range (dB) (dB) ----- 0.125...

  • Page 169: Results: 20 - 22Db Noise Source Enr

    Model N8975A: Test Records Noise Figure Range and Accuracy Test Record Results: 20 - 22dB Noise Source ENR Input Range Actual Measured Noise Figure Instrument Specification Pass/ Level (dB) NF (dB) NF (dB) Measurement Uncertainty (dB) Fail (dBm) Range (dB) (dB) ----- 0.125...

  • Page 170: Gain Measurement Uncertainty Test Record

    Model N8975A: Test Records Gain Measurement Uncertainty Test Record Gain Measurement Uncertainty Test Record Measurement Worst Pk-Pk Specification (dB) Pass/Fail Range (dB) Instrumentation Uncertainty -20 to > +40 dB ± 0.17dB Appendix D...

  • Page 171: Instrument Noise Figure Test Record

    Model N8975A: Test Records Instrument Noise Figure Test Record Instrument Noise Figure Test Record Frequency (MHz) Instrument Noise Specification (dB) Pass/Fail Figure (dB) 10.00 to 26500 Overall Frequency Test Line Limit Range Result 10.00 < 4.425dB 30.00 < 4.475dB 60.00 <...
  • Page 172 Model N8975A: Test Records Instrument Noise Figure Test Record Frequency (MHz) Instrument Noise Specification (dB) Pass/Fail Figure (dB) 14000.00 < 12.50dB 15000.00 < 12.50dB 16000.00 < 12.50dB 17000.00 < 12.50dB 18000.00 < 12.50dB 19000.00 < 12.50dB 20000.00 < 12.50dB 21000.00 <...

  • Page 173: Measurement Jitter Test Record

    Model N8975A: Test Records Measurement Jitter Test Record Measurement Jitter Test Record Frequency (MHz) Standard Deviation Specification (dB) Pass/Fail (dB) 1000 < 0.10dB Appendix D...
  • Page 174 Model N8975A: Test Records Measurement Jitter Test Record Appendix D...
  • Page 175 Caring for Connectors The material contained in this appendix may not be apply to the connector you are using on the instrument.

  • Page 176: Introduction

    Caring for Connectors Introduction Introduction Recent advances in measurement capabilities have made connectors and connection techniques more important than ever before. Damage to the connectors on calibration and verification devices, test ports, cables, and other devices represent an increasing burden in downtime and expense. This Appendix will help you get the best performance from all coaxial microwave connectors: •...

  • Page 177: Visual Inspection

    Caring for Connectors Visual Inspection Visual Inspection Visual inspection and, if necessary, cleaning should be done every time a connection is made. Metal and metal by-product particles from the connector threads often find their way onto the mating plane surfaces when a connection is disconnected and even one connection made with a dirty or damaged connector can damage both connectors beyond repair.

  • Page 178: Precision 7 Mm Connectors

    Caring for Connectors Visual Inspection Light burnishing of the mating plane surfaces is normal, and is evident as light scratches or shallow circular marks distributed more or less uniformly over the mating plane surface. Other small defects and cosmetic imperfections are also normal. None of these affect electrical or mechanical performance.

  • Page 179: Sexed Connectors

    Caring for Connectors Visual Inspection Figure E-1 Precision 7mm Connector Outer Conductor Center Conductor Collet Outer Conductor Dielectric Mating Plane Support bead Sexed Connectors On sexed connectors, especially precision 3.5mm and SMA connectors, pay special attention to the female center conductor contact fingers (Figure E-2 and Figure E-3).
  • Page 180 Caring for Connectors Visual Inspection Figure E-3 SMA connectors MALE Outer Conductor Mating Plane FEMALE Appendix E...

  • Page 181: Cleaning

    Caring for Connectors Cleaning Cleaning Careful cleaning of all connectors is essential to assure long, reliable connector life, to prevent accidental damage to connectors, and to obtain maximum measurement accuracy and repeatability. Yet it is the one step most often neglected or done improperly. Supplies recommended for cleaning microwave connectors are as follows: •...

  • Page 182: Precision 7 Mm Connectors

    Caring for Connectors Cleaning Alcohol should be used in liquid rather than spray form. If a spray must be used, always spray the alcohol onto a cloth or swab, never directly into a connector. Very dirty connectors can be cleaned with pure alcohol. Other solutions that contain additives should not be used.

  • Page 183: Cleaning Interior Surfaces

    Caring for Connectors Cleaning Cleaning Interior Surfaces Interior surfaces, especially on precision 3.5mm connectors, are very difficult to reach, and it is easy to damage connectors in trying to clean them. The openings are very small, and generally the center conductor is supported only at the inner end, by a plastic dielectric support bead.

  • Page 184: Drying Connectors

    Caring for Connectors Cleaning Moisten the cloth with a small amount of alcohol and carefully insert it into the connector to clean the interior surfaces. Use an illuminated magnifying glass or microscope to see clearly the areas you wish to clean. Drying Connectors When you have cleaned a connector, always be sure that it is completely dry before reassembling or using it.

  • Page 185: Mechanical Inspection: Connector Gages

    Caring for Connectors Mechanical Inspection: Connector Gages Mechanical Inspection: Connector Gages Even a perfectly clean, unused connector can cause problems if it is mechanically out of specification. Since the critical tolerances in microwave connectors are on the order of a few ten-thousandths of an inch, using a connector gage is essential.

  • Page 186: Mechanical Specifications

    Caring for Connectors Mechanical Specifications Mechanical Specifications The critical dimension to be measured, regardless of connector type, is the position (generally, the recession or setback) of the center conductor relative to the outer conductor mating plane. Mechanical specifications for connectors specify a maximum distance and a minimum distance that the center conductor can be positioned behind (or, in female Type-N connectors, in front of) the outer conductor mating plane.

  • Page 187: Sexed Connectors

    Caring for Connectors Mechanical Specifications Sexed Connectors In Type-N and precision 3.5mm connectors, the position of the center conductor in the male connector is defined as the position of the shoulder of the male contact pin - not the position of the tip. The male contact pin slides into the female contact fingers and electrical contact is made by the inside surfaces of the tip of the female contact fingers on the sides of the male contact pin.

  • Page 188: Ohm Type-N Connectors

    Caring for Connectors Mechanical Specifications Figure E-5 Type-N connectors MALE Outer Conductor Mating Plane FEMALE Therefore the mechanical specifications of Type-N connectors give a maximum protrusion of the female contact fingers in front of the outer conductor mating plane and a minimum recession of the shoulder of the male contact pin behind the outer conductor mating plane.

  • Page 189: Using Connector Gages

    Caring for Connectors Using Connector Gages Using Connector Gages Before a connector gage is used, it must be inspected, cleaned, and zeroed. Inspecting and Cleaning the Gage Inspect the connector gage and the gage calibration block carefully, exactly as you have inspected the connector itself. Clean or replace the gage or the block if necessary (dirt on the gage or block will make the gage measurements of the connectors inaccurate and can transfer dirt to the connectors themselves, damaging them during gaging or when the...
  • Page 190 Caring for Connectors Using Connector Gages • Gently rock the two surfaces together, to make sure that they have come together flatly. The gage pointer should now line up exactly with the zero mark on the gage. If it does not, inspect and clean the gage and gage calibration block again and repeat this process.
  • Page 191 Caring for Connectors Using Connector Gages Measuring Connectors Measuring the recession of the center conductor behind the outer conductor mating plane in a connector is done in exactly the same way as zeroing the gage, except of course that the graduated dial is not re-set when the measurement is made.

  • Page 192: Making Connections

    Caring for Connectors Making Connections Making Connections Making good connections is easy if a few simple principles are kept in mind: • Aall connectors must be undamaged, clean, and within mechanical specification. • The connectors must be precisely aligned with one another and in flat physical contact at all points on the mating plane surfaces.

  • Page 193: To Make A Preliminary Connection

    Caring for Connectors Making Connections Alignment of precision 7mm connectors is made easier by the fact that the connector sleeve on one of the connectors must be extended fully (and the sleeve on the other connector retracted fully) in order to make the connection.

  • Page 194: Final Connection Using A Torque Wrench

    Caring for Connectors Making Connections Final Connection Using a Torque Wrench When the preliminary connection has been made, use a torque wrench to make the final connection. Tighten the connection only until the “break” point of the wrench is reached, when the wrench handle gives way at its internal pivot point.

  • Page 195: Disconnection

    Caring for Connectors Making Connections Table E-2 Recommended Torque Settings Type Description Precision 12 lb-in (136 N-cm.) Precision 8 lb-in (90 N-cm) 3.5mm 5 lb-in (56 N-cm) Use the SMA wrench to connect male SMA connectors to female precision 3.5min connectors. Connections of male precision 3.5mm.
  • Page 196 Caring for Connectors Making Connections NOTE Never disconnect connectors by twisting one connector or device out of the other as one might remove a screw or a light bulb. This is extremely harmful and connector damage can occur whenever the device body rather than the nut alone is being turned.

  • Page 197: Adapters

    Caring for Connectors Adapters Adapters Adapters are used to connect a device with one connector interface to a device or to test equipment that has another interface, or to reduce wear on connectors that may be difficult or expensive to replace. Reducing wear is possibly the most important use of adapters, especially when devices that have SMA connectors are being used.
  • Page 198 Caring for Connectors Adapters Table E-3 Adapters Type Description Precision 7mm and Precision 7mm/male 3.5mm Type-N Precision 7mm/female 3.5 mm Ω Precision 7mm/male 50 Type-N Precision Ω 7mm/female 50 Type-N Precision 3.5mm Male 3.5mm/female 3.5mm and SMA Male 3.5mm/female 3.5 mm Female 3.5mm/female 3.5mm Precision 7mm/male 3.5mm Precision 7mm/female 3.5mm “Connector...

  • Page 199: Principles Of Microwave Connector Care

    Caring for Connectors Principles of Microwave Connector Care Principles of Microwave Connector Care Table E-4 Principles of Microwave Connector Care Handling and Storage DO NOT • Keep connectors clean. • Touch mating plane surfaces. • Extend sleeve or connector nut. •...
  • Page 200 Caring for Connectors Principles of Microwave Connector Care Table E-4 Principles of Microwave Connector Care Gaging DO NOT • Clean and zero the gage before • Use an out-of-spec connector. using. • Use correct gage type. • Use correct end of calibration block.
  • Page 201 This information is subject to change without notice. © Keysight Technologies 2001-2019 Edition 1, January 2019 N8972-90083 www.keysight.com...

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