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Agilent Technologies N5242A, Service Manual

The Agilent Technologies N5242A is a high-performance network analyzer used for testing and analyzing RF and microwave components. Users can access the Service Manual for free download on our website, providing detailed instructions for operation and maintenance. Visit manualshive.com to get your copy of the manual.

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Service Guide N5242-90001

5-23

PNA Series Microwave Network Analyzers

     Theory of Operation

N5242A

Receiver Group Operation

Table 5-6

PULSE I/O Connector Pin Assignments

DB-15 Female Connector

Pin

Name

Description

1

IFGateAin

IF pulse gate input A (TTL)

2

IFGateBin

IF pulse gate input B (TTL)

3

IFGateCin

IF pulse gate input C (TTL)

4

IFGateDin

IF pulse gate input D (TTL)

5

IFGateRin

IF pulse gate input R (TTL)

6

DCOM

Digital ground

7

PulseSyncIn

Pulse generator synchronization trigger input (TTL)

8

RFPulseModIn

RF source pulse modulation drive input (TTL)

9

DCOM

Digital ground

10

Pulse1Out

Programmable pulse train output #1 (TTL)

11

Pulse2Out

Programmable pulse train output #2 (TTL)

12

Pulse3Out

Programmable pulse train output #3 (TTL)

13

Pulse4Out

Programmable pulse train output #4 (TTL)

14

NC

No connect

15

DCOM

Digital ground

Summary of Contents for N5242A

Page 1: ...e N5242A Agilent Technologies 2 Port and 4 Port PNA Microwave Network Analyzers 10 MHz 26 5 GHz Part Number N5242 90001 Printed in USA November 2007 Supersedes Print Date March 2007 Agilent Technologi...

Page 2: ...ct Software is delivered and licensed as Commercial computer software as defined in DFAR 252 227 7014 June 1995 or as a commercial item as defined in FAR 2 101 a or as Restricted computer software as...

Page 3: ...iliarize yourself with each of the notes and its meaning before operating this instrument All pertinent safety notes for using this product are located in Chapter 1 Safety and Regulatory Information W...

Page 4: ...dia presentation and access the analyzer s Web page The Installation and Quick Start Guide helps you to quickly familiarize yourself with the analyzer Procedures are provided for installing configurin...

Page 5: ...Internal Pulse Generators 2 4 Option 029 Noise Figure Measurement Capability 2 4 Option 080 Frequency Offset Measurements 2 4 Option 082 Scalar Calibrated Converter Measurements 2 5 Option 083 Vector...

Page 6: ...of Calibration 3 7 ANSI NCSL Z540 1 1994 Verification 3 8 Non ANSI NCSL Z540 1 1994 Verification 3 9 Preliminary Checks 3 10 The Operator s Check 3 10 The Test Port Cable Checks 3 12 System Verificat...

Page 7: ...eshooting 4 18 Measurement System Troubleshooting 4 23 Before you begin consider Where do you see a problem 4 23 Verifying the A B C D and R Traces Standard S Parameter Mode 4 25 Where to Begin Troubl...

Page 8: ...Assembly Back Side All Options 6 12 Top Assemblies All Options 6 14 Top Cables All Cables All Options 6 16 Bottom Assemblies Standard 2 Port Configuration Option 200 6 18 Bottom RF Cables Standard 2 P...

Page 9: ...nt Procedures 7 4 Removing the Covers 7 6 Removing and Replacing the Front Panel Assembly 7 8 Removing and Replacing the A1 A3 and Other Front Panel Subassemblies 7 10 Removing and Replacing the A4 A1...

Page 10: ...s 8 3 Using Error Terms as a Diagnostic Tool 8 3 Performing Measurement Calibration 8 4 Using Flowgraphs to Identify Error Terms 8 4 Accessing Error Terms 8 8 Error Term Data 8 10 Option Enable Utilit...

Page 11: ...Service Guide N5242 90001 1 1 1 Safety and Regulatory Information...

Page 12: ...ter One at a Glance Section Title Summary of Content Start Page Safety Symbols Descriptions of CAUTION and WARNING symbols used throughout this manual Page 1 3 General Safety Considerations A list of...

Page 13: ...t General Safety Considerations Safety Earth Ground WARNING This is a Safety Class I product provided with a protective earthing ground incorporated in the power cord The mains plug shall only be inse...

Page 14: ...f the product must not be restricted The ambient temperature outside the cabinet must be less than the maximum operating temperature of the instrument by 4 C for every 100 watts dissipated in the cabi...

Page 15: ...qualified personnel To prevent electrical shock do not remove covers WARNING The opening of covers or removal of parts may expose dangerous voltages Disconnect the instrument from all voltage sources...

Page 16: ...ections always wear a heel strap when working in an area with a conductive floor If you are uncertain about the conductivity of your floor wear a heel strap always ground yourself before you clean ins...

Page 17: ...uct compliance with the Canadian Interference Causing Equipment Standard ICES 001 This is a symbol of an Industrial Scientific and Medical Group 1 Class A product This is a required mark signifying co...

Page 18: ...PU board assembly needs to be disposed of dispose of it in accordance with your country s requirements If required you may return the battery to Agilent Technologies for disposal Refer to Contacting A...

Page 19: ...Service Guide N5242 90001 2 1 2 General Product Information...

Page 20: ...rk analyzers Page 2 3 Analyzer Accessories Available A list of accessories available for the microwave network analyzers Page 2 9 Analyzer Upgrades Available A list of the upgrades available for the m...

Page 21: ...ile capability The software sets the coefficient of the analyzer s digital IF filters to null out unwanted spectral components enables the receiver IF gates on the rear panel controls internal pulse g...

Page 22: ...rators provided with Option 025 can be used The N1966A pulse I O adapter is recommended if using an external pulse generator See Analyzer Accessories Available on page 2 9 Option 025 Add Four Internal...

Page 23: ...Measurement SMC and the Vector Mixer Calibration VMC Option 1CM Rack Mount Kit for Instruments without Handles Option 1CM provides a rack mount kit that contains a pair of flanges rack mount rails an...

Page 24: ...and 419 hardware this 26 5 GHz 4 port analyzer contains one source combiner four source bypass switches Option 551 N Port Calibrated Measurements This option allows your analyzer to make calibrated m...

Page 25: ...nalyzer to the manufacturer s published specifications It includes a calibration label an ISO 17025 calibration certificate and the corresponding calibration data measurement uncertainties and guardba...

Page 26: ...nal Source Option 022 N5242AU 022 Add Four Internal Pulse Generators Option 025 N5242AU 025 Add Frequency Offset Mode Option 080 N5242AU 080 Add Scalar Calibrated Converter Measurements Option 082 N52...

Page 27: ...essory is a 4 port USB hub for connecting additional USB peripheral devices and can be ordered as model number N4689A Pulse I O Adapter N1966A An adapter for connecting between the analyzer s rear pan...

Page 28: ...tion BW 300 Hz 8565E 856xE A T Power meter Accuracy 0 0068 dB E4418B 19B E4418A 19Ab b If an accurate measurement of the dynamic accuracy specification is not required the E4418A or E4419A can be used...

Page 29: ...Kits 3 5 mm calibration kit Freq 10 MHz to 26 5 GHz 85052B 85052D P T V 3 5 mm verification kit Freq 10 MHz to 26 5 GHz 85053B None V Cables BNC cable 2 required 50 length 60 cm 8120 1839 None A 3 5 m...

Page 30: ...14 in lb setting N A N A T R T 20 TORX driver 2 4 N m 21 in lb setting N A N A T R 1 4 inch and 5 16 inch open end wrench Thin profile 8710 0510 N A A R 5 16 inch open end torque wrench metric equival...

Page 31: ...ttp www agilent com find assist If you do not have access to the Internet please contact your Agilent field engineer NOTE In any correspondence or telephone conversation refer to the Agilent product b...

Page 32: ...2 14 Service Guide N5242 90001 General Product Information PNA Series Microwave Network Analyzers Agilent Support Services and Assistance N5242A...

Page 33: ...Service Guide N5242 90001 3 1 3 Tests and Adjustments...

Page 34: ...represents a softkey a key whose label is determined by the instrument firmware Menu Item This represents an item in a drop down or pop up menu Section Title Summary of Content Start Page Before You B...

Page 35: ...Maximum Power Output Test Source Power Linearity Test Frequency Accuracy Test Trace Noise Test Receiver Compression Test Noise Floor Test Calibration Coefficients Test Dynamic Accuracy Test Page 3 28...

Page 36: ...rature As the device dimensions change with temperature their electrical characteristics change as well It is necessary to keep the environmental levels within the following limits Temperature 23 C 3...

Page 37: ...Store connectors or adapters loose Visual Inspection Do Inspect all connectors carefully Do Not Use a damaged connector ever Look for metal particles scratches and dents Connector Cleaning Do Try comp...

Page 38: ...error corrected measurements using the same calibration kit and test cables used during the system verification routine System specifications are applicable only when the measurement system is used t...

Page 39: ...If confirmation is successful the analyzer meets the instrument specifications Performance tests are contained in the analyzer s firmware with Options 897 or 898 and are described at Performance Test...

Page 40: ...ng to repair or adjust1 Refer to Figure 3 1 for test flow Print data at the completion of all the tests even if you are aware that the analyzer did not pass If there is a failure complete the verifica...

Page 41: ...tion or performance tests while stopping to troubleshoot Refer to Figure 3 2 for test flow Troubleshoot and repair the first problem encountered without continuing to other tests After you troubleshoo...

Page 42: ...t signal paths By performing the operator s check the following are determined attenuation ranges of all installed attenuators calibration of the receivers frequency response of the receivers phase lo...

Page 43: ...fferent for different PNA model numbers and installed options Some of the tests are performed only if the appropriate options are installed in the PNA Figure 3 3 Operator s Check Dialog Box If the Ope...

Page 44: ...ed but are recommended to verify the performance of the test port cable Cable Return Loss Check on page 3 13 Cable Insertion Loss Check on page 3 14 Cable Magnitude and Phase Stability Check on page 3...

Page 45: ...plays the return loss of the cable 4 Press MARKER ANALYSIS then In the Marker Search dialog box in the Search Type box make sure Maximum is selected Click Execute and then click OK 5 The marker annota...

Page 46: ...and then click OK 3 The displayed response is twice the actual loss To get the actual worst case insertion loss divide the value at the marker annotation by two Refer to the cable manual to see if it...

Page 47: ...9 To normalize the data trace press MARKER ANALYSIS then then then then ENTRY 10 Slowly make a 180 degree bend in the middle of the cable and hold it in that position 11 For each trace press RESPONSE...

Page 48: ...s Preliminary Checks N5242A Figure 3 6 Typical Cable Magnitude and Phase Stability Response If the Cable Magnitude and Phase Stability Check Fails 1 Clean the cable and devices and torque to specifica...

Page 49: ...above the display Set the Scale Per Division for 0 5 dB Press ENTRY b Press The Reference Level box will appear directly above the display Set the Reference Level for 0 dB Press ENTRY 7 Disconnect and...

Page 50: ...ck connect the cable with the load attached to the respective port and repeat steps 2 through 11 Figure 3 7 Typical Cable Connector Repeatability Response If the Cable Connector Repeatability Check Fa...

Page 51: ...verified You can determine your system measurement uncertainty limits by referring to the analyzer embedded on line help IMPORTANT Passing this system verification does not guarantee that the analyze...

Page 52: ...lk The random errors include noise drift connector repeatability and test cable stability A complete description of system errors and how they affect measurements is provided in the analyzer s on line...

Page 53: ...This is accomplished by measuring the devices in an Agilent verification kit The measurement of the devices in the verification kit has a traceable path because the factory system that measured the de...

Page 54: ...s For each verification device the analyzer reads a file from the verification disk and sequentially measures the magnitude and phase for all four S parameters IMPORTANT For system verification to per...

Page 55: ...is performed with a non Agilent cable ensure that the cable meets or exceeds the specifications for the test cable specified in the previous table Equipment Used in the System Verification Procedure R...

Page 56: ...on page 3 27 File Tabular Data Writes the tabular data to a text file in the C Program Files Agilent Network Analyzer Documents directory File Graphs Saves a screen image in PNG format in the C Progra...

Page 57: ...on that you performed earlier 1 Disconnect and clean the device that failed the verification test 2 Reconnect the device making sure that all connections are torqued to the proper specifications 3 Mea...

Page 58: ...lts with Print Tabular Data selected in the Printer Output area of the System Verification dialog box At the top of the printed output is the name of the device the serial number of the device and the...

Page 59: ...on dialog box The printed graphical results show the following the name of the device measured the serial number of the device the parameters measured Results of the measurements Labeled as A in Figur...

Page 60: ...est Trace Noise Test Receiver Compression Test Noise Floor Test Calibration Coefficients Test Dynamic Accuracy Test Source Power Accuracy Test Function of the Test To confirm the accuracy of the sourc...

Page 61: ...ification Tested Power Sweep Range and Power Level Linearity Equipment Used A test cable And a 20 dB attenuator if the analyzer does not have an internal step attenuator Description of the Test 1 The...

Page 62: ...d then repeat this test Trace Noise Test Function of the Test To measure the stability of a signal in the internal source and receiver system of your analyzer Specification Tested Test Port Input Trac...

Page 63: ...er sensor is disconnected and the signal source point is connected to the port to be tested 7 The absolute log magnitude value dBm for the reference channel is read 8 The log magnitude ratioed measure...

Page 64: ...ected and the cable is connected to the port to be tested 5 The absolute power level in dBm log magnitude is read Plog 6 The test cable is removed and loads are connected to both ports 7 The analyzer...

Page 65: ...test cable is attached to the first port and a calibration is performed at the end of the cable and at the second port The cable is moved to the second port and another calibration is performed Using...

Page 66: ...e analyzer source and the dynamic accuracy test set create power levels that are deltas from the reference power level of 20 dBm Each delta is measured two ways by the power sensor and by the analyzer...

Page 67: ...yzer If multiple adjustments are to be performed perform them in the order listed 10 MHz Frequency Reference Adjustment on page 3 36 IF Gain Adjustment on page 3 37 Synthesizer Bandwidth Adjustment on...

Page 68: ...stment typically adjusts to within 0 01 ppm 1 Connect the equipment as shown in Figure 3 13 Connect a GPIB cable between the network analyzer and the frequency counter Figure 3 13 Equipment Setup for...

Page 69: ...er Procedure 1 Press UTILITY then then then click IF Gain Adjustment 2 Follow the instructions and prompts as they are displayed Synthesizer Bandwidth Adjustment This adjusts the bandwidth of the 13 5...

Page 70: ...ource Adjustment Procedure 1 Connect the equipment as shown in Figure 3 14 Connect a GPIB cable between the network analyzer and the power meter Figure 3 14 Equipment Setup for the Source Adjustment 2...

Page 71: ...er at Port 1 Data obtained during this adjustment are stored in the mxcalfile_pxx files on the hard disk drive The data are used in subsequent measurements If the hard disk drive is replaced these mxc...

Page 72: ...5242A Figure 3 15 Equipment Setup 1 for the Receiver Adjustment 2 Press UTILITY then then then click Receiver Adjustment 3 Ensure the GPIB settings are correct 4 Follow the instructions and prompts as...

Page 73: ...Service Guide N5242 90001 3 41 PNA Series Microwave Network Analyzers Tests and Adjustments N5242A Adjustments Figure 3 17 Equipment Setup 3 for the Receiver Adjustment...

Page 74: ...Procedure 1 Press UTILITY then then then click Receiver Characterization 2 Follow the instructions and prompts as they are displayed EE Default Adjustment This sets the EEPROM data to their default va...

Page 75: ...Service Guide N5242 90001 4 1 4 Troubleshooting...

Page 76: ...r Up Troubleshooting Power up problems Power supply problems LCD problems Bootup for the network analyzer interface Page 4 6 Front Panel Troubleshooting Problems occurring after the network analyzer i...

Page 77: ...c discharge follow all of the recommendations outlined in Electrostatic Discharge Protection on page 1 6 for all of the procedures in this chapter Assembly Replacement Sequence After identifying the p...

Page 78: ...r to be on go to Power Up Troubleshooting on page 4 6 3 Is the Windows operating system running If not refer to Operating System Recovery in Chapter 8 for instructions 4 If other equipment cables and...

Page 79: ...ion Follow the flowgraph in Figure 4 1 to help direct you to the correct section for troubleshooting the analyzer Figure 4 1 Troubleshooting Organization Flowchart Go to Power Up Troubleshooting on pa...

Page 80: ...fans should be audible The display should flash and then show the hardware boot up sequence This process checks the RAM and communication with the hard disk drive These checks return an error message...

Page 81: ...ument s outer and inner covers Refer to Removing the Covers on page 7 6 for removal procedures To determine the location of the A15 midplane board refer to Top Assemblies All Options on page 6 14 CAUT...

Page 82: ...Failure to do so can result in personal injury or loss of life CAUTION Do not operate the analyzer with the outer cover removed for more than 30 minutes as this could cause the analyzer to overheat w...

Page 83: ...tions 1 Unplug the A19 test set motherboard ribbon cable from the A19 test set motherboard refer to Removing and Replacing the A19 Test Set Motherboard on page 7 26 1 Unplug the A19 test set motherboa...

Page 84: ...e A17 CPU board refer to Removing and Replacing the A51 Hard Disk Drive HDD on page 7 48 The minimum required assemblies to power up the analyzer are A16 power supply A15 midplane board A14 system mot...

Page 85: ...r to Removing and Replacing the A14 System Motherboard on page 7 16 If only one or two fans are not functioning and the power supplies are within specifications suspect the A14 system motherboard or d...

Page 86: ...dim the A3 display assembly is defective Refer to Removing and Replacing the A1 A3 and Other Front Panel Subassemblies on page 7 10 If the display is dark not visible connect an external VGA monitor...

Page 87: ...bleshooting on page 4 6 Refer to the following sections to verify the operation of the noted assemblies Front Panel Keypad and RPG Test on this page A3 Display Test on page 4 15 Checking the A2 USB Bo...

Page 88: ...ront Panel Interface Board and Keypad Assembly on page 7 10 If none of the keys are working correctly suspect a faulty A1 front panel interface board To replace the A1 front panel interface board refe...

Page 89: ...Pixel A pixel is a picture element that combines to create the image on the display A pixel is about the size of a small pin point A damaged pixel is A pixel that has a constant blue green or red appe...

Page 90: ...CPU board The speaker produces the audio output from signals supplied by the A17 CPU board It routes key pad commands from the keypad to the A17 CPU board It routes display signals from the A17 CPU bo...

Page 91: ...SB device wait 15 seconds and then reconnect the device to the rear panel USB port If the USB device still does not work and has been verified to work elsewhere then the A17 CPU board is faulty Refer...

Page 92: ...recognized by the analyzer and displayed Refer to the manual of the peripheral to read or change its address Troubleshooting Systems with Controllers Passing the preceding test indicates that the anal...

Page 93: ...lyzer is set properly and that it is unique If unsure how to check the IP address refer to the embedded help in the analyzer 2 Make sure the subnet mask is 0 0 0 0 If not note the current setting to a...

Page 94: ...each of four cycle attempts similar to that in step 5 Other software may behave somewhat differently but basically the same If the analyzer can talk to the network but the network can not talk to the...

Page 95: ...set to off The crossover cable could be miswired One or both analyzers could be defective If possible eliminate the possibility of a defective analyzer by substitution of a known working unit Once th...

Page 96: ...nd of the cable c Connect the wire from pin 2 on one end of the cable to the wire from pin 6 on the other end of the cable d Connect the wire from pin 6 on one end of the cable to the wire from pin 2...

Page 97: ...k analyzer s performance has degraded to an unacceptable level yet it continues to operate and displays no error messages For this type of failure performance tests must be conducted to isolate the pr...

Page 98: ...he pc boards are listed by name and part number and the correct firmware revision code is given for each To view this EEPROM header information on the network analyzer display press UTILITY then then...

Page 99: ...on of the PNA It is therefore recommended that you run this test even if you suspect only the frequency offset section of a malfunction The first step is to verify that the A B C D and R traces are pr...

Page 100: ...t Models If all traces are present and are similar to the traces in Figure 4 6 or Figure 4 7 then there are no major problems with the analyzer s measurement system There may however be a minor failur...

Page 101: ...and A32 test port couplers A19 test set motherboard the receiver group A33 reference channel mixer switch A42 A43 A44 and A45 35 dB receiver step attenuators optional A23 and A24 mixer bricks A12 SPAM...

Page 102: ...bled but all traces are still missing in all bands go to Checking the Source Group on page 4 29 If the trace faults are band related the problem is in the source group Go to Source Group Tests on page...

Page 103: ...cause the analyzer to overheat which could result in costly damage Single vs Broadband Failure There are two main types of failures that are related to the source group The failures are classified as...

Page 104: ...es and then for LO related problems continue testing at Checking the A11 13 5 GHz LO Synthesizer Output for source related problems continue testing at Checking the A4 and A13 Source Synthesizer Outpu...

Page 105: ...nt at a CW frequency of 2 GHz and observe the spectrum analyzer measurement The spectrum analyzer should measure a signal at 2 GHz plus the 7 61 MHz offset 5 If the signal is not present and the signa...

Page 106: ...from the source board to be checked 3 Connect the spectrum analyzer to the open connector at the end of the cable that connects to the source board to be checked 4 Set the network analyzer for a 2 GH...

Page 107: ...for more than 30 minutes as this could cause the analyzer to overheat which could result in costly damage Checking the Output Power of the A B C and D Signals Using a power meter you can measure the...

Page 108: ...any of the following that are appropriate Bottom Assemblies Standard 2 Port Configuration Option 200 on page 6 18 Bottom RF Cables Standard 2 Port Configuration Option 200 on page 6 20 Bottom Assembli...

Page 109: ...of A25 Port 2 W23 of A28 Port 3 W15 of A26 Port 4 W19 or A27 Options 219 224 419 and 423 Port 1 W71 of A25 Port 2 W83 of A28 Port 3 W75 of A26 Port 4 W79 of A27 2 Using a 5 16 inch torque wrench disc...

Page 110: ...is not present replace the source step attenuator Refer to Removing and Replacing the A34 A37 Source Attenuators the A38 A41 Bias Tees and the A42 A45 Receiver Attenuators on page 7 42 5 If the 1 GHz...

Page 111: ...ottom Assemblies 4 Port Option 419 including Option 029 on page 6 46 Bottom RF Cables 4 Port Option 419 without Option 029 Ports 1 and 2 on page 6 48 Bottom RF Cables 4 Port Option 419 without Option...

Page 112: ...of the mixer brick s 2 port models Channel A W51 of A23 Channel R1 W52 of A23 Channel R2 W53 of A23 Channel B W54 of A23 4 port models Channel A W51 of A23 Channel R1 W52 of A23 Channel R2 W53 of A23...

Page 113: ...d A45 35 dB Receiver Step Attenuators 1 Locate the appropriate semirigid cable at the output of the receiver step attenuator to be checked Options 219 224 419 and 423 Port 1 W88 of A34 Port 2 W94 of A...

Page 114: ...nnel to be tested on the A20 IF multiplexer board 3 Connect the spectrum analyzer to the open connector 4 The measured signal on the spectrum analyzer should be at 7 61 MHz 5 If the measured signal is...

Page 115: ...42 90001 4 41 PNA Series Microwave Network Analyzers Troubleshooting N5242A Instrument Block Diagrams Sheet 1 Instrument Block Diagrams Sheet 1 Microwave PNA N5242A Insert fold out fold up 23 x 35 n52...

Page 116: ...4 42 Service Guide N5242 90001 Troubleshooting PNA Series Microwave Network Analyzers Instrument Block Diagrams Sheet 1 N5242A...

Page 117: ...42 90001 4 43 PNA Series Microwave Network Analyzers Troubleshooting N5242A Instrument Block Diagrams Sheet 2 Instrument Block Diagrams Sheet 2 Microwave PNA N5242A Insert fold out fold up 23 x 35 n52...

Page 118: ...4 44 Service Guide N5242 90001 Troubleshooting PNA Series Microwave Network Analyzers Instrument Block Diagrams Sheet 2 N5242A...

Page 119: ...Service Guide N5242 90001 5 1 5 Theory of Operation...

Page 120: ...ction Title Summary of Content Start Page Network Analyzer System Operation A summary of the theory of operation for the analyzer A summary of the operation of the major functional groups of the analy...

Page 121: ...ied to the device under test DUT and then to the receiver group The LO signal is applied directly to the receiver group where it is mixed with the test and reference signals to produce IF signals for...

Page 122: ...separated into major functional groups Each group consists of assemblies that perform a distinct function in the instrument Some of the assemblies are related to more than one group and all of the gr...

Page 123: ...the LO signal in the receiver group to produce the 7 606 MHz or 2 535 MHz at frequencies below 53 MHz IF signal The incident signal output power is leveled by an internal automatic leveling control AL...

Page 124: ...erence signals to 7 606 MHz intermediate frequency IF signals for signal processing retaining both magnitude and phase characteristics The IF signals are converted to digital information by the digita...

Page 125: ...produces a constant phase locked reference signal of 50 MHz that is sent to the A4 A13 and A11 13 5 GHz synthesizer boards The A11 13 5 GHz synthesizer board produces an LO signal that is sent throug...

Page 126: ...5 8 Service Guide N5242 90001 Theory of Operation PNA Series Microwave Network Analyzers Synthesized Source Group Operation N5242A Figure 5 3 Source Group...

Page 127: ...1 1 000 to 1 500 1 000 to 1 500 17 1 1 50761 to 2 00761 1 50761 to 2 00761 1 500 to 2 000 1 500 to 2 000 18 1 2 00761 to 3 00761 2 00761 to 3 00761 2 000 to 3 000 2 000 to 3 000 19 1 3 00761 to 3 2076...

Page 128: ...sizer board to produce the output frequencies listed in Table 5 2 The output of the A11 13 5 GHz synthesizer board the LO synthesizer is 7 606 MHz higher than the output of the A4 and A13 13 5 GHz syn...

Page 129: ...lled crystal oscillator OCXO normally provides the frequency standard However if a 10 MHz external reference signal is detected at the 10 MHz EXT REF IN port on the rear panel it is used as the freque...

Page 130: ...f 13 multiplexed address and data lines three control lines and an open collector interrupt line Pin assignments are listed in Table 5 3 on page 5 13 Up to 16 test sets may be daisy chained on the bus...

Page 131: ...latched data 7 GND 0 V ground reference 8 LAS TTL out active low address strobe 1 s min 9 11 AD4 AD2 TTL I O address and latched data 12 GND 0 V ground reference 13 Interrupt In TTL in low level 10 s...

Page 132: ...7 Out TTL out latched 13 20 Port B0 7 Out TTL out latched 21 24 Port C I O TTL I O latched 25 28 Port D I O TTL I O latched 29 Port C Status TTL out low input mode high output mode 30 Port D Status TT...

Page 133: ...al resolution 1 MHz BW 4 AnalogOut2 Analog Output Voltage Programmable 10 V 100 mA out Nominally 0 ohms 2 44 mV typical resolution 1 MHz BW 5 ACOM System ground 6 GndSense Ground sense for Analog In a...

Page 134: ...le test set is included in the standard analyzer and allows you to measure devices with higher power and higher dynamic range limits than an analyzer without the configurable test set On 4 port models...

Page 135: ...THRU and CPLR ARM connects to SOURCE OUT While increasing forward S21 dynamic range the reverse S12 dynamic range is degraded by the same amount A25 A28 Bridges The source incident signals from the A5...

Page 136: ...5 18 Service Guide N5242 90001 Theory of Operation PNA Series Microwave Network Analyzers Signal Separation Group Operation N5242A Figure 5 4 4 Port Signal Separation Group...

Page 137: ...Service Guide N5242 90001 5 19 PNA Series Microwave Network Analyzers Theory of Operation N5242A Signal Separation Group Operation Figure 5 5 2 Port Signal Separation Group...

Page 138: ...tenuators are controlled by the A17 CPU board The bias tees are to provide DC biasing for the DUT A46 A49 Source Bypass Switches and A50 Combiner Optional On 4 port models with Option 423 a source byp...

Page 139: ...ence mixer switch is placed in the R1 reference signal path allowing this reference signal to be switched in and out of the signal path when an external mixer is being used in test configuration An ex...

Page 140: ...he IF signal out through the rear panel connectors for external use and routes external signals in through rear panel connectors to be included in the signal processing In this assembly on 4 port mode...

Page 141: ...se gate input C TTL 4 IFGateDin IF pulse gate input D TTL 5 IFGateRin IF pulse gate input R TTL 6 DCOM Digital ground 7 PulseSyncIn Pulse generator synchronization trigger input TTL 8 RFPulseModIn RF...

Page 142: ...cted by the analog to digital converter ADC All input signals are sampled simultaneously by the ADCs where they are converted to digital form The ADC conversions are triggered by timing signals from t...

Page 143: ...Service Guide N5242 90001 5 25 PNA Series Microwave Network Analyzers Theory of Operation N5242A Receiver Group Operation Figure 5 6 4 Port Receiver Group...

Page 144: ...5 26 Service Guide N5242 90001 Theory of Operation PNA Series Microwave Network Analyzers Receiver Group Operation N5242A Figure 5 7 2 Port Receiver Group...

Page 145: ...port configuration is shown the 2 port configuration is very similar Refer to the detailed block diagrams at the end of Chapter 4 if necessary In this section the following assemblies are described A5...

Page 146: ...5 28 Service Guide N5242 90001 Theory of Operation PNA Series Microwave Network Analyzers Noise Measurement Group Operation Option 029 N5242A Figure 5 8 Noise Measurement Group Option 029...

Page 147: ...ration output to the display math processing functions and communications between the analyzer and an external controller or peripherals A block diagram of the digital control functional group is show...

Page 148: ...Service Guide N5242 90001 Theory of Operation PNA Series Microwave Network Analyzers Digital Processing and Digital Control Group Operation N5242A Figure 5 9 Digital Processing and Digital Control Gr...

Page 149: ...nals received from the A17 CPU board A2 USB Board This board provides four universal serial bus USB jacks that are industry standard 4 pin connectors allowing multiple USB devices to be connected to t...

Page 150: ...f the analyzer Some of the components include the central processing unit CPU memory EEPROM ROM RAM bus lines to other board assemblies and connections to the rear panel Some of the main components ar...

Page 151: ...ure of the A17 CPU board The full operating system and firmware for the network analyzer is stored on the A51 hard disk drive USB x4 Four universal serial bus USB jacks industry standard 4 pin connect...

Page 152: ...o normal input ranges of the autoranging line voltage input will damage the power supply In rare cases this damage has become a user safety concern If unstable power levels are expected the analyzer i...

Page 153: ...Service Guide N5242 90001 6 1 6 Replaceable Parts...

Page 154: ...rmation How to order a replaceable part from Agilent Technologies Page 6 3 Assembly Replacement Sequence The correct sequence for replacing a defective assembly Page 6 3 Rebuilt Exchange Assemblies Th...

Page 155: ...uantity required Contact Agilent Technologies for instructions on where to send the order Refer to Contacting Agilent on page 2 13 Assembly Replacement Sequence The following steps describe how to rep...

Page 156: ...ed and tested assemblies are available on a trade in basis Exchange assemblies are offered for lower cost than a new assembly but meet all factory specifications required of a new assembly The defecti...

Page 157: ...Panel Assembly Back Side All Options on page 6 12 A2 USB board A3 Display assembly A4 13 5 GHz synthesizer board Top Assemblies All Options on page 6 14 A5 26 5 GHz source board A6 Not used A7 Noise...

Page 158: ...ort 3 bias tee A40 Port 4 bias tee A41 Port 2 bias tee A42 Port 1 receiver step attenuator A43 Port 3 receiver step attenuator A44 Port 4 receiver step attenuator A45 Port 2 receiver step attenuator A...

Page 159: ...12 Top Assemblies All Options on page 6 14 Bottom Assemblies Standard 2 Port Configuration Option 200 on page 6 18 Bottom Assemblies 2 Port Option 219 including Option 029 on page 6 24 Bottom Assembli...

Page 160: ...RF Cables 4 Port Option 419 with Option 029 Ports 3 and 4 on page 6 54 Bottom RF Cables 4 Port Option 423 without Option 029 Ports 1 and 2 on page 6 60 Bottom RF Cables 4 Port Option 423 with Option...

Page 161: ...Miscellaneous Parts All Options on page 6 76 External Hardware and Miscellaneous Parts All Options on page 6 78 Rear Panel Assembly All Options on page 6 80 Miscellaneous Service Tools on page 6 82 D...

Page 162: ...th the N5242A 5041 9174 2 Trim strip filler For analyzers without handles N5242 80005 1 Keypad overlay N5242 00012 1 Lower front dress panel 2 port N5242 00013 Lower front dress panel 4 port N5242 800...

Page 163: ...Service Guide N5242 90001 6 11 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 2 Front Panel Assembly Front Side All Options...

Page 164: ...ront panel interface board to inverter board 0515 1934 4 Machine screw M2 5 x 6 pan head To attach inverter board and USB controller board to display hold down bracket 0950 4420 1 Inverter board 0960...

Page 165: ...Service Guide N5242 90001 6 13 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 3 Front Panel Assembly Back Side All Options...

Page 166: ...0 60041 1 Signal Processing ADC Module SPAM board A13 N5230 60002 1 13 5 GHz source 2 synthesizer board On 2 port models this assembly is included only with Option 224 A14 N5240 60044 1 System motherb...

Page 167: ...Service Guide N5242 90001 6 15 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 4 Top Assemblies All Options...

Page 168: ...N5242 60015 1 A20 IF multiplexer board P603 to A12 SPAM board J5 W62 F N5242 60016 1 A20 IF multiplexer board P803 to A12 SPAM board J6 W63 F N5242 60014 1 A20 IF multiplexer board P403 to A12 SPAM b...

Page 169: ...Service Guide N5242 90001 6 17 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 5 Top Cables All Cables All Options...

Page 170: ...rebuilt exchange assemblies Refer to Rebuilt Exchange Assemblies on page 6 4 Qty Description A19 N5240 60043 1 Test set motherboard A20 N5240 60045 1 IF multiplexer board A21 5087 7711 1 LO Multiplier...

Page 171: ...Service Guide N5242 90001 6 19 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 6 Bottom Assemblies Standard 2 Port Configuration Option 200...

Page 172: ...switch W40 SR N5242 20049 1 REF 2 RCVR R2 IN to A23 mixer brick R2 W41 SR N5242 20110 1 A11 13 5 GHz synthesizer to A21 HMA26 5 W45 SR N5242 20093 1 A8 source 1 to W46 W46 SR N5242 20090 1 W46 to rear...

Page 173: ...Service Guide N5242 90001 6 21 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 7 Bottom RF Cables Standard 2 Port Configuration Option 200...

Page 174: ...therboard J3 to A33 reference mixer switch 3W N5242 60009 A19 test set motherboard J221 to port 1 LED board J1 10R N5242 60005 Rear panel PWR I O to A19 test set motherboard J301 16R N5242 60006 A19 t...

Page 175: ...Guide N5242 90001 6 23 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 8 Bottom Ribbon Cables and Wire Harnesses Standard 2 Port Configuration Opti...

Page 176: ...on 029 only A23 5087 7308 5087 6308 1 Mixer brick A25 A28 5087 7315 2 Test port 1 bridge Test port 2 bridge A29 A32 5087 7710 2 Test port 1 coupler Test port 2 coupler A33 N5240 60048 1 Reference mixe...

Page 177: ...Service Guide N5242 90001 6 25 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 9 Bottom Assemblies 2 Port Option 219 including Option 029...

Page 178: ...5242 60012 1 A20 IF multiplexer P3 to A12 SPAM J1 W60 F N5242 60013 1 A20 IF multiplexer P203 to A12 SPAM J2 W61 F N5242 60014 1 A20 IF multiplexer P403 to A12 SPAM J4 W62 F N5242 60015 1 A20 IF multi...

Page 179: ...Service Guide N5242 90001 6 27 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 10 Bottom RF Cables 2 Port Option 219 without Option 029...

Page 180: ...xer P801 W85 SR N5242 20045 1 Front panel Port 2 CPLR THRU to A41 port 2 bias tee W115 SR N5242 20113 1 A29 port 1 coupler to front panel Port 1 CPLR ARM W117 SR N5242 20114 1 A32 port 2 coupler to fr...

Page 181: ...on 219 with Option 029 W141 SR N5242 20129 1 A55 noise downconverter to A7 noise receiver board LO W142 F N5242 20041 1 A55 noise downconverter J4 to A7 noise receiver board P2 W143 SR N5242 20130 1 A...

Page 182: ...to A23 mixer brick 1 2W 8121 0836 A19 test set motherboard J541 to A38 port 1 bias tee 3W N5242 60009 A19 test set motherboard J222 to port 2 LED board J1 2W 8121 0836 A19 test set motherboard J544 t...

Page 183: ...e Guide N5242 90001 6 31 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 12 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 219 including Opti...

Page 184: ...Test port 1 bridge Test port 2 bridge A29 A32 5087 7710 2 Test port 1 coupler Test port 2 coupler A33 N5240 60048 1 Reference mixer switch A34 A37 33321 60070 2 Test port 1 source attenuator Test port...

Page 185: ...Service Guide N5242 90001 6 33 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 13 Bottom Assemblies 2 Port Option 224 including Option 029...

Page 186: ...nel SRC 2 OUT 1 W68 SR N5242 20107 1 W7 to SRC 2 OUT 2 W70 SR N5242 20123 1 A21 HMA26 5 to A23 mixer brick W71 SR N5242 20005 1 A25 port 1 bridge to A34 port 1 source attenuator W72 SR N5242 20038 1 A...

Page 187: ...es 2 Port Option 224 without Option 029 W117 SR N5242 20114 1 A32 port 2 coupler to front panel Port 2 CPLR ARM W119 SR N5242 20115 1 A38 port 1 bias tee to A29 port 1 coupler W120 SR N5242 20108 1 A4...

Page 188: ...nel PORT 1 COMB ARM IN J9 to A50 combiner W100 SR N5242 20008 1 A50 combiner to A46 port 1 source bypass switch W101 SR N5242 20017 1 W5 to A47 SRC 2 source bypass switch W103 SR N5242 20081 1 A47 SRC...

Page 189: ...R2 IN to A23 mixer brick R2 W139 SR N5242 20131 1 A22 splitter to A55 noise downconverter W141 SR N5242 20129 1 A55 noise downconverter to A7 noise receiver board LO W142 F N5242 20041 1 A55 noise do...

Page 190: ...242 60006 A19 test set motherboard J212 to A23 mixer brick 1 2W 8121 0836 A19 test set motherboard J541 to A38 port 1 bias tee 3W N5242 60009 A19 test set motherboard J222 to port 2 LED board J1 2W 81...

Page 191: ...e Guide N5242 90001 6 39 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 16 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 224 including Opti...

Page 192: ...n page 6 4 Qty Description A19 N5240 60043 1 Test set motherboard A20 N5240 60045 1 IF multiplexer board A21 5087 7711 1 LO Multiplier amplifier 26 5 HMA26 5 A22 5087 7139 5087 6139 1 Splitter A23 A24...

Page 193: ...Service Guide N5242 90001 6 41 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 17 Bottom Assemblies Standard 4 Port Configuration Option 400...

Page 194: ...A28 port 2 bridge to front panel REF 2 SOURCE OUT W30 SR E8356 20072 12 Front panel jumper W31 SR N5242 20056 1 Port 1 RCVR A IN to A23 mixer brick A W32 SR N5242 20058 1 Port 3 RCVR C IN to A24 mixe...

Page 195: ...rts Listings Figure 6 18 Bottom RF Cables Standard 4 Port Configuration Option 400 W62 F N5242 60015 1 A20 IF multiplexer P603 to A12 SPAM J5 W63 F N5242 60016 1 A20 IF multiplexer P803 to A12 SPAM J6...

Page 196: ...witch 3W N5242 60009 A19 test set motherboard J221 to ports 1 3 LED board J1 10R N5242 60005 Rear panel PWR I O to A19 test set motherboard J301 16R N5242 60006 A19 test set motherboard J212 to A23 mi...

Page 197: ...Guide N5242 90001 6 45 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 19 Bottom Ribbon Cables and Wire Harnesses Standard 4 Port Configuration Opt...

Page 198: ...A32 5087 7710 4 Test port 1 coupler Test port 3 coupler Test port 4 coupler Test port 2 coupler A33 N5240 60048 1 Reference mixer switch A34 A35 A36 A37 33321 60070 4 Test port 1 source attenuator Te...

Page 199: ...Service Guide N5242 90001 6 47 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 20 Bottom Assemblies 4 Port Option 419 including Option 029...

Page 200: ...ear panel EXT TSET DRIVE RF OUT J6 W47 SR N5242 20089 1 A23 mixer brick to EXT TSET DRIVE LO OUT J5 W51 F N5242 60017 1 A23 mixer brick A to A20 IF multiplexer P1 W52 F N5242 60021 1 A23 mixer brick R...

Page 201: ...ervice Guide N5242 90001 6 49 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 21 Bottom RF Cables 4 Port Option 419 without Option 029 Ports 1 and 2...

Page 202: ...4 W62 F N5242 60015 1 A20 IF multiplexer P603 to A12 SPAM J5 W63 F N5242 60016 1 A20 IF multiplexer P803 to A12 SPAM J6 W74 SR N5242 20022 1 A38 port 1 bias tee to A29 port 1 coupler W85 SR N5242 2004...

Page 203: ...22 Bottom RF Cables 4 Port Option 419 with Option 029 Ports 1 and 2 W142 F N5242 20041 1 A55 noise downconverter J4 to A7 noise receiver board P2 W143 SR N5242 20130 1 A55 noise downconverter to A7 no...

Page 204: ...W56 F N5242 60019 1 A24 mixer brick R4 to A20 IF multiplexer P414 W57 F N5242 60020 1 A24 mixer brick R3 to A20 IF multiplexer P413 W58 F N5242 60023 1 A24 mixer brick C to A20 IF multiplexer P601 W59...

Page 205: ...ervice Guide N5242 90001 6 53 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 23 Bottom RF Cables 4 Port Option 419 without Option 029 Ports 3 and 4...

Page 206: ...k R4 to A20 IF multiplexer P414 W57 F N5242 60020 1 A24 mixer brick R3 to A20 IF multiplexer P413 W58 F N5242 60023 1 A24 mixer brick C to A20 IF multiplexer P601 W59 F N5242 60012 1 A20 IF multiplexe...

Page 207: ...Service Guide N5242 90001 6 55 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 24 Bottom RF Cables 4 Port Option 419 with Option 029 Ports 3 and 4...

Page 208: ...set motherboard J541 to A38 port 1 bias tee 2W 8121 0836 A19 test set motherboard J542 to A39 port 3 bias tee 2W 8121 0836 A19 test set motherboard J543 to A40 port 4 bias tee 3W N5242 60009 A19 test...

Page 209: ...e Guide N5242 90001 6 57 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 25 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 419 including Opti...

Page 210: ...ort 2 coupler A33 N5240 60048 1 Reference mixer switch A34 A35 A36 A37 33321 60070 4 Test port 1 source attenuator Test port 3 source attenuator Test port 4 source attenuator Test port 2 source attenu...

Page 211: ...Service Guide N5242 90001 6 59 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 26 Bottom Assemblies 4 Port Option 423 including Option 029...

Page 212: ...42 60013 1 A20 IF multiplexer P203 to A12 SPAM J2 W61 F N5242 60014 1 A20 IF multiplexer P403 to A12 SPAM J4 W62 F N5242 60015 1 A20 IF multiplexer P603 to A12 SPAM J5 W63 F N5242 60016 1 A20 IF multi...

Page 213: ...ervice Guide N5242 90001 6 61 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 27 Bottom RF Cables 4 Port Option 423 without Option 029 Ports 1 and 2...

Page 214: ...rt 1 source bypass switch to A25 port 1 bridge W97 SR N5242 20086 1 A46 port 1 source bypass switch to PORT 1 SW SRC OUT J11 W98 SR N5242 20087 1 Rear panel PORT 1 COMB THRU IN J10 to A50 combiner W99...

Page 215: ...with Option 029 Ports 1 and 2 W141 SR N5242 20129 1 A55 noise downconverter to A7 noise receiver board LO W142 F N5242 20041 1 A55 noise downconverter J4 to A7 noise receiver board P2 W143 SR N5242 20...

Page 216: ...SPAM J4 W62 F N5242 60015 1 A20 IF multiplexer P603 to A12 SPAM J5 W63 F N5242 60016 1 A20 IF multiplexer P803 to A12 SPAM J6 W75 SR N5242 20005 1 A26 port 3 bridge to A35 port 3 source attenuator W76...

Page 217: ...ervice Guide N5242 90001 6 65 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 29 Bottom RF Cables 4 Port Option 423 without Option 029 Ports 3 and 4...

Page 218: ...multiplexer P603 to A12 SPAM J5 W63 F N5242 60016 1 A20 IF multiplexer P803 to A12 SPAM J6 W75 SR N5242 20005 1 A26 port 3 bridge to A35 port 3 source attenuator W76 SR N5242 20029 1 A35 port 3 sourc...

Page 219: ...Service Guide N5242 90001 6 67 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 30 Bottom RF Cables 4 Port Option 423 with Option 029 Ports 3 and 4...

Page 220: ...otherboard J541 to A38 port 1 bias tee 2W 8121 0836 A19 test set motherboard J542 to A39 port 3 bias tee 2W 8121 0836 A19 test set motherboard J543 to A40 port 4 bias tee 3W N5242 60009 A19 test set m...

Page 221: ...e Guide N5242 90001 6 69 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 31 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 423 including Opti...

Page 222: ...to attach fan bracket to chassis 4 to attach power supply bracket to inner panels left side bracket and fan bracket and 3 to attach A14 system motherboard to the chassis Chassis Refer to Internal Har...

Page 223: ...Service Guide N5242 90001 6 71 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 33 Top Hardware and Miscellaneous Parts Top View All Options...

Page 224: ...00007 1 Bracket For A34 A37 source attenuators A39 A41 bias tees and A42 A45 receiver attenuators 0515 0430 30 Machine screw M3 0 x 6 pan head 8 to attach bridge brackets to test set deck 12 to attach...

Page 225: ...Service Guide N5242 90001 6 73 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 34 Bottom Hardware and Miscellaneous Parts All Options Except 029...

Page 226: ...port 2 source attenuators and A42 port 1 and A45 port 2 receiver attenuators to their brackets 0515 0666 4 Machine screw M3 0 x 18 pan head To attach A52 port 1 and A53 port 2 switches to their brack...

Page 227: ...Service Guide N5242 90001 6 75 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 35 Bottom Hardware and Miscellaneous Parts Option 029...

Page 228: ...12 00050 1 Right side inner bracket N5242 00001 1 Chassis 0515 0372 39 Machine screw M3 0 x 8 pan head 4 to attach midplane bracket to left and right side inner brackets 6 to attach front bracket to l...

Page 229: ...Service Guide N5242 90001 6 77 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 36 Internal Hardware and Miscellaneous Parts All Options...

Page 230: ...rew M4 0 x 25 pan head To attach rear foot E4400 60026 2 Strap handle assembly Includes item 0515 0710 4 Machine screw M5 0 x 18 flat head To attach strap handle 5041 9183 4 Key lock for bottom foot 5...

Page 231: ...Service Guide N5242 90001 6 79 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 37 External Hardware and Miscellaneous Parts All Options...

Page 232: ...34 2 Lock washer 0380 0644 2 Jack screw 2190 0584 6 Lock washer 1251 7812 6 Jack screw N5242 60005 1 PWR I O cable assembly 1810 0118 3 Termination 50 ohm load 8121 0834 1 HANDLER I O cable assembly 2...

Page 233: ...Service Guide N5242 90001 6 81 PNA Series Microwave Network Analyzers Replaceable Parts N5242A Replaceable Parts Listings Figure 6 38 Rear Panel Assembly All Options...

Page 234: ...b site Refer to Printing Copies of Documentation from the Web on page iv N5242 90001 GPIB Cables GPIB Adapter GPIB cable 0 5 meter 1 6 feet 10833D GPIB cable 1 meter 3 3 feet 10833A GPIB cable 2 meter...

Page 235: ...r and Source Switches for 4 Port Models Option 419 to 423 N5242AU 927 Noise Figure Measurements for 4 port models Option 029 N5242AU 929 N Port Calibrated Measurements Option 551 N5242AU 551 USB Acces...

Page 236: ...6 84 Service Guide N5242 90001 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5242A...

Page 237: ...Service Guide N5242 90001 7 1 7 Repair and Replacement Procedures...

Page 238: ...ersonal safety Page 7 3 Electrostatic Discharge ESD Protection Information pertaining to ESD protection Page 7 3 Table of Removal and Replacement Procedures A table of removal and replacement procedur...

Page 239: ...s after disconnecting the plug before removing the covers WARNING The detachable power cord is the instrument disconnecting device It disconnects the mains circuits from the mains supply before other...

Page 240: ...display board USB board Display assembly Page 7 10 A4 A13 A11 A5 A8 A7 A10 A12 13 5 GHz synthesizer boards 26 5 GHz source boards Noise receiver board Frequency reference board Signal processing ADC...

Page 241: ...t 4 bias tee Optional Port 2 bias tee Optional Page 7 42 Page 7 44 A42 A43 A44 A45 Port 1 receiver step attenuator Optional Port 3 receiver step attenuator Optional Port 4 receiver step attenuator Opt...

Page 242: ...connect the power cord 2 Remove the strap handles item by loosening the screws item with a T 20 TORX driver on both ends until the handle is free of the analyzer 3 Remove the foot locks item from the...

Page 243: ...Service Guide N5242 90001 7 7 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing the Covers Figure 7 1 Outer and Inner Cover Removal...

Page 244: ...3 With a 5 16 inch torque wrench remove all the semirigid jumpers item from the front panel 4 With a T 10 TORX driver remove the 12 screws item from the sides of the frame CAUTION Before removing the...

Page 245: ...Service Guide N5242 90001 7 9 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the Front Panel Assembly Figure 7 2 Front Panel Assembly Removal...

Page 246: ...ws item from the USB board and unplug it from the A1 front panel interface board Removing the A1 Front Panel Interface Board and Keypad Assembly 1 Remove the A2 USB board as outlined above 2 Remove th...

Page 247: ...em from the USB controller board 2 Remove two screws item and remove the USB controller board Removing the Power Switch Board and Power Button Keypad 1 Disconnect the power switch cable item from the...

Page 248: ...ard cable item and power switch cable item 2 Remove six screws item from the A3 display assembly and remove the A3 display assembly from the front panel assembly 3 The touch screen can now be removed...

Page 249: ...removed by disconnecting the LCD cable from the inverter board and then removing the four screws item that attach it to the LCD display hold down bracket item Note the location of the four spacers it...

Page 250: ...t each end of the board from the source board to be removed d Lift the two extractors item one at each end of the board and lift the board out of the chassis 4 A4 A7 A10 A11 A12 and A13 boards a Remov...

Page 251: ...ce Guide N5242 90001 7 15 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A4 A13 Boards Figure 7 6 A4 A5 A7 A8 A10 A11 A12 and A13 Boards Rem...

Page 252: ...7 14 7 Remove the fan bracket and fans Refer to Removing and Replacing the Fans on page 7 60 8 Turn the analyzer over so that the bottom side is up and remove four screws item that secure the bottom o...

Page 253: ...ervice Guide N5242 90001 7 17 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A14 System Motherboard Figure 7 7 A14 System Motherboard Remova...

Page 254: ...isengage the A15 midplane board from the A14 system motherboard 7 Note the positions of the five rubber grommets item on the bottom three A15 midplane board alignment pins Remove these rubber grommets...

Page 255: ...Service Guide N5242 90001 7 19 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A15 Midplane Board Figure 7 8 A15 Midplane Board Removal...

Page 256: ...7 9 for this procedure 1 Disconnect the power cord 2 Remove the outer and inner covers Refer to Removing the Covers on page 7 6 3 Remove the three flat head screws item from the power supply bracket...

Page 257: ...ice Guide N5242 90001 7 21 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A16 Power Supply Assembly Figure 7 9 A16 Power Supply Assembly Rem...

Page 258: ...les and rotate them outward toward the sides of the analyzer as shown in the illustration This will disengage the A17 CPU board assembly from the A15 midplane board 5 Slide the A17 CPU board assembly...

Page 259: ...rvice Guide N5242 90001 7 23 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A17 CPU Board Assembly Figure 7 10 A17 CPU Board Assembly Remova...

Page 260: ...Refer to Removing the Covers on page 7 6 3 Remove the A16 power supply assembly Refer to Removing and Replacing the A16 Power Supply Assembly on page 7 20 4 Remove the A17 CPU board assembly Refer to...

Page 261: ...Service Guide N5242 90001 7 25 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A18 GPIB Board Figure 7 11 A18 GPIB Board Removal...

Page 262: ...analyzer bottom side up 4 Disconnect ALL ribbon cables item and ALL wire harnesses item from the A19 test set motherboard 5 Remove connector hardware item from 11 rear panel BNC connectors 6 Remove c...

Page 263: ...ice Guide N5242 90001 7 27 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A19 Test Set Motherboard Figure 7 12 A19 Test Set Motherboard Remo...

Page 264: ...ray flexible RF cables item from the A20 IF multiplexer board 7 Remove connector hardware item from five rear panel RF connectors 8 Remove connector hardware item from the rear panel PULSE I O connect...

Page 265: ...ice Guide N5242 90001 7 29 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A20 IF Multiplexer Board Figure 7 13 A20 IF Multiplexer Board Remo...

Page 266: ...isconnect the power cord 2 Remove the outer cover Refer to Removing the Covers on page 7 6 3 Position the analyzer bottom side up 4 Disconnect the ribbon cable item from the A21 HMA26 5 assembly 5 Dis...

Page 267: ...Service Guide N5242 90001 7 31 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A21 HMA26 5 Figure 7 14 A21 HMA26 5 Removal...

Page 268: ...mbly However do not over bend the semirigid cables 1 Disconnect the power cord 2 Remove the outer cover Refer to Removing the Covers on page 7 6 3 Position the analyzer bottom side up 4 Disconnect cab...

Page 269: ...Service Guide N5242 90001 7 33 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A22 Splitter Figure 7 15 A22 Splitter Removal...

Page 270: ...ribbon cables item from each of the mixer bricks 7 Remove two screws item from each end of the mixer brick bracket 8 Move the disconnected semirigid cables out of the way and lift the mixer brick moun...

Page 271: ...val procedure If replacing the A24 mixer brick remember to install the short circuit termination item removed from the old mixer brick onto the new mixer brick in the same location Torque all RF cable...

Page 272: ...ter cover Refer to Removing the Covers on page 7 6 3 Position the analyzer bottom side up 4 Disconnect three semirigid cables item from the bridge to be replaced 5 Remove two screws item from the moun...

Page 273: ...N5242 90001 7 37 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacingthe A25 A28 Bridges and Bridge Mounting Brackets Figure 7 17 A25 through A28 Bri...

Page 274: ...4 On 4 port models it is necessary to remove the couplers in pairs ports 1 3 and 2 4 5 Disconnect two semirigid cables item from each coupler to be removed 6 Disconnect the wire harness item from the...

Page 275: ...ide N5242 90001 7 39 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A29 A32 Test Port Couplers Figure 7 18 A29 through A32 Test Port Coupler...

Page 276: ...ge 7 6 3 Position the analyzer bottom side up 4 Disconnect four semirigid cables item from the A33 reference mixer switch 5 Remove three screws item that secure the A33 reference mixer switch to the s...

Page 277: ...e Guide N5242 90001 7 41 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A33 Reference Mixer Switch Figure 7 19 A33 Reference Mixer Switch Re...

Page 278: ...receiver attenuator pair the associated bias tee and the bracket to which they are attached must be removed as a complete assembly 6 Disconnect the ribbon cable item from the attenuators to be removed...

Page 279: ...Microwave Network Analyzers Repair and Replacement Procedures N5242ARemovingandReplacingtheA34 A37 Source Attenuators theA38 A41BiasTees andtheA42 A45Receiver Attenuators Figure 7 20 Source and Receiv...

Page 280: ...ide up 5 On some 4 port models it may be necessary to remove the attenuator bracket to which the bias tee is attached to facilitate replacing the bias tee If this is the case refer to Removing and Rep...

Page 281: ...ervice Guide N5242 90001 7 45 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A38 A41 Bias Tees Figure 7 21 A38 through A41 Bias Tees Removal...

Page 282: ...bypass switches and the brackets to which they are attached must be removed as a complete assembly The A50 combiner is removed with the A46 bypass switch 5 Disconnect four semirigid cables item from...

Page 283: ...7 47 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A46 A49 Bypass Switches and the A50 Combiner Figure 7 22 A46 through A49 Bypass Switches...

Page 284: ...gen lic user_calkitfile All files prefixed with mxcalfile_ Any personal user files that you wish to preserve 5 Remove the USB flash drive from the USB port 6 Exit Windows Explorer Tools Required T 10...

Page 285: ...vice Guide N5242 90001 7 49 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the A51 Hard Disk Drive HDD Figure 7 23 Hard Disk Drive Assembly Remo...

Page 286: ...follow the instructions under Agilent Administrator Password http mktwww soco agilent com field service network pna support htm If this procedure is being performed by non Agilent personnel contact A...

Page 287: ...on 3 Point to Programs Accessories and then open Windows Explorer 4 Navigate to C Program Files Agilent Network Analyzer 5 Copy each of the backup files from the USB flash drive to the HDD 6 Navigate...

Page 288: ...and the bracket to which they are attached must be removed as a complete assembly 6 Disconnect the ribbon cables item from the attenuators to be removed 7 Disconnect the wire harness cable item for t...

Page 289: ...er of the removal procedure Be sure to install the bias tee bracket on the new switch and reinstall the bias tee once the bracket has been reinstalled in the analyzer Torque all cable connections to 1...

Page 290: ...ving the Covers on page 7 6 3 Remove the front panel assembly Refer to Removing and Replacing the Front Panel Assembly on page 7 8 4 Position the analyzer bottom side up 5 The A54 test port 2 bridge t...

Page 291: ...ssembling the A54 A55 assembly lay the assemblies on a flat surface while installing and tightening the interconnecting cable adapter to ensure that these assemblies will be flush with the side frame...

Page 292: ...e A17 CPU Board Assembly on page 7 22 5 Remove all jumper cables item from the rear panel 6 Remove the short item and the 50 ohm load s item 7 Remove the connector hardware item from each of the five...

Page 293: ...Service Guide N5242 90001 7 57 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the Rear Panel Figure 7 26 Rear Panel Removal...

Page 294: ...r this procedure CAUTION Be careful not to damage the center pins of the semirigid cables Some flexing of the cables is necessary to remove the assembly However do not over bend the semirigid cables 1...

Page 295: ...rvice Guide N5242 90001 7 59 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the Front Panel LED Boards Figure 7 27 Front Panel LED Boards Remova...

Page 296: ...placing the A16 Power Supply Assembly on page 7 20 5 Remove five screws item that attach the fan bracket to the chassis 6 Remove three screws item that attach the rear panel to the fan bracket 7 Raise...

Page 297: ...Service Guide N5242 90001 7 61 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the Fans Figure 7 28 B1 Fan Removal...

Page 298: ...cover attachment screws item 5 Lift the top cover enough to disconnect the hard disk drive cable item from the CPU board then remove the top cover with the hard disk drive attached from the A17 CPU bo...

Page 299: ...Service Guide N5242 90001 7 63 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5242A Removing and Replacing the Lithium Battery Figure 7 29 Lithium Battery Removal...

Page 300: ...cy Accuracy Test Source Power Accuracy Test Source Maximum Power Output Test Source Power Linearity Test The Operator s Check A5 26 5 GHz source board Source Adjustment Receiver Adjustment Frequency A...

Page 301: ...urce Adjustment Receiver Adjustment Frequency Accuracy Test Source Power Accuracy Test Source Maximum Power Output Test Source Power Linearity Test The Operator s Check A23 and A24 mixer bricks Receiv...

Page 302: ...Test A51 hard disk drive Restore previously saved receiver calibration dataa or perform Receiver Adjustment Read and write to the drive B1 fan No adjustment needed Check for fan operation Battery No a...

Page 303: ...Service Guide N5242 90001 8 1 8 General Purpose Maintenance Procedures...

Page 304: ...intenance and troubleshooting tool Page 8 3 Option Enable Utility How to use the option enable utility to enable options that have been added to your analyzer Page 8 13 Firmware Upgrades Where to find...

Page 305: ...tervals weekly monthly and so forth you can compare current error terms to these records A stable system should generate repeatable error terms over long intervals for example six months Look for the...

Page 306: ...recommendations outlined in Electrostatic Discharge Protection on page 1 6 when performing the following calibration 1 Connect a type N cable to Port 2 2 Perform a full 2 port calibration FULL SOLT 2...

Page 307: ...res N5242A Error Terms Figure 8 2 Flowgraph of Two Port Error Terms where E error term 1st Subscript D Directivity S Source Match R Reflection Tracking X Crosstalk Isolation L Load Match T Transmissio...

Page 308: ...Directivity MAT Forward Source Match and Reverse Load Match TRK Forward Reflection Tracking and Reverse Transmission Tracking For the case of a full 3 port calibration port 1 has three Match error ter...

Page 309: ...urce Match and Reverse Load Match TRK Forward Reflection Tracking and Reverse Transmission Tracking For the case of a full 4 port calibration port 1 has four Match error terms S11 source match S12 loa...

Page 310: ...the error terms from the front panel perform the following steps 1 Press RESPONSE then Verify that is ON If not press the softkey to toggle it ON The Cal Set Viewer toolbar appears directly above the...

Page 311: ...ds for Programmable Instruments SCPI For more information on GPIB and SCPI refer to the embedded help in the analyzer Type in keyword errors systematic in the index COM DCOM Access to Error Terms You...

Page 312: ...Adjustments Figure 8 5 Error Term Dataa a The data in this table are uncorrected system performance The values apply over an environmental temperature range of 25 C 5 C with less than 1 C deviation fr...

Page 313: ...e match between all components from the source to the output port The measurements most affected by source match errors are reflection and transmission measurements of highly reflective DUTs Typical C...

Page 314: ...rs affect transmission measurements primarily where the measured signal level is very low The measurements most affected by isolation error terms are DUTs with large insertion loss Since these terms a...

Page 315: ...nder HOW TO USE THIS CERTIFICATE to obtain license key s for the option s listed on the certificate See the important note below NOTE When upgrading from one model number to another a new option entit...

Page 316: ...to Contacting Agilent on page 2 13 It is necessary to backup all installed software options if the A10 frequency reference board is replaced To enable or remove an option 1 Start the option enable ut...

Page 317: ...Begin Repair The data is written from the gen lic file into the EEPROM If the hard disk drive is replaced a new gen lic file is automatically created when the Network Analyzer application starts by r...

Page 318: ...from the Option Enable menu bar see Figure 8 6 on page 8 13 The current serial number is displayed If no serial number has previously been entered the word NONE will be displayed 2 VERY CAREFULLY typ...

Page 319: ...Internet Downloading from the Internet If your network analyzer is connected to the Internet there are two methods available for checking the availability of and downloading new firmware Download dire...

Page 320: ...vering from Hard Disk Drive Problems If you suspect that you have a hard disk drive problem go to the Hard Drive Recovery link on the Agilent PNA Series Service Support Home Page on the Internet The U...

Page 321: ...switches Option 423 2 6 4 port configuration with extended power and bias tees Option 419 2 6 4 port standard configuration Option 400 2 6 551 option description of 2 6 897 option built in tests for...

Page 322: ...strated 6 41 6 47 6 59 part number 6 40 6 46 6 58 removal and replacement illustrated 7 37 procedure 7 36 troubleshooting 4 35 A28 test port 2 bridge illustrated 6 19 6 25 6 33 6 41 6 47 6 59 part num...

Page 323: ...4 39 A45 test port 2 receiver step attenuator illustrated 6 25 6 33 6 47 6 59 operation 5 21 part number 6 24 6 32 6 46 6 58 removal and replacement illustrated 7 43 procedure 7 42 troubleshooting 4 3...

Page 324: ...6 power supply 5 6 receiver group 5 6 signal separation 5 6 synthesized source 5 5 internal performance test software 3 28 internal replaceable parts illustrated 6 77 part numbers 6 76 miscellaneous...

Page 325: ...ceable ribbon wire harnesses illustrated 6 45 part numbers 6 44 bottom assembly Option 419 replaceable RF cables illustrated 6 49 6 53 part numbers 6 48 6 52 replaceable ribbon cables illustrated 6 57...

Page 326: ...rt numbers 6 16 calibrated measurements N port Option 551 2 6 calibration ANSI Z540 standards compliant Option A6J 2 7 certificate of 3 7 coefficients test 3 33 commercial built in tests Option 897 2...

Page 327: ...orage hard disk 5 33 IDE 5 33 data option recovering 8 15 repairing 8 15 DCOM 8 9 default EE adjustment 3 42 description functional digital control group 5 6 digital processing group 5 6 noise measure...

Page 328: ...max output power 5 5 frequency reference board illustrated 6 15 operation 5 11 part number 6 14 removal and replacement illustrated 7 15 procedure 7 14 troubleshooting 4 30 front frame illustrated 6 1...

Page 329: ...lustrated 6 19 6 25 6 33 6 41 6 47 6 59 operation 5 11 5 17 part number 6 18 6 24 6 32 6 40 6 46 6 58 removal and replacement illustrated 7 31 procedure 7 30 troubleshooting 4 30 I IDE data storage 5...

Page 330: ...1 part numbers 6 80 magnitude check failure of 3 16 test port cables 3 15 maintenance cleaning 2 3 preventive effect on error terms 8 3 max output power and frequency range 5 5 measurement calibration...

Page 331: ...6 5 27 Option 080 frequency offset mode 2 4 Option 082 scaler calibrated converter measurements 2 5 Option 083 vector and scaler calibrated frequency converter measurements 2 5 Option 1CM rack mount w...

Page 332: ...sembly all options 6 70 kits handle 6 83 rack mount 6 83 locating by reference designator 6 5 by type of part 6 7 for assemblies 6 7 for hardware 6 9 for miscellaneous parts 6 8 6 9 Option 029 hardwar...

Page 333: ...cation ANSI NCSL Z540 1 1994 3 8 non ANSI NCSL Z540 1 1994 3 9 performance test software internal 3 28 phase stability check failure of 3 16 test port cables 3 15 pin assignments connectors HANDLER I...

Page 334: ...6 replaceable cables ribbon in top assembly all options illustrated 6 17 part numbers 6 16 replaceable cables semi rigid in top assembly all options illustrated 6 17 part numbers 6 16 replaceable cabl...

Page 335: ...rated 7 17 procedure 7 16 A15 midplane board illustrated 7 19 procedure 7 18 A16 power supply assembly illustrated 7 21 procedure 7 20 A17 CPU board illustrated 7 23 procedure 7 22 A18 GPIB board illu...

Page 336: ...ypad assembly illustrated 7 11 procedure 7 10 power button keypad illustrated 7 11 procedure 7 11 power switch board illustrated 7 11 procedure 7 11 rear panel illustrated 7 57 procedure 7 56 touch sc...

Page 337: ...ustrated 7 15 procedure 7 14 troubleshooting 4 32 source 2 pulse modulator Option 022 2 4 source 2 synthesizer board removal and replacement procedure 7 14 troubleshooting 4 31 source board operation...

Page 338: ...t port 1 bias tee illustrated 6 25 6 33 6 47 6 59 part number 6 24 6 32 6 46 6 58 removal and replacement illustrated 7 43 7 45 procedure 7 42 7 44 troubleshooting 4 36 test port 1 bridge illustrated...

Page 339: ...ement illustrated 7 43 procedure 7 42 troubleshooting 4 36 test port 4 bias tee illustrated 6 47 6 59 part number 6 46 6 58 removal and replacement illustrated 7 43 7 45 procedure 7 42 7 44 troublesho...

Page 340: ...t port 1 receiver step attenuator 4 39 A43 test port 3 receiver step attenuator 4 39 A44 test port 4 receiver step attenuator 4 39 A45 test port 2 receiver step attenuator 4 39 A46 test port 1 source...

Page 341: ...or and scalar calibrated converter measurements Option 083 2 5 ventilation requirements 1 3 verification ANSI NCSL Z540 1 1994 3 8 kits 2 11 3 7 substitution 3 23 non ANSI NCSL Z540 1 1994 3 9 of oper...

Page 342: ...Index 22 Service Guide N5242 90001 Index...

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