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Agilent Technologies 346A Скачать руководство пользователя страница 36

Chapter 1

29

General Information

Service

Service

Principles of Operation

Figure 1-11 shows a simplified diagram of the noise source. When driven
by a +28V pulse, the 346 produces an output noise spectrum with an
ENR of approximately 5.0 dB for the 346A and approximately 15.0 dB
for the 346B and 346C. The noise generator is an avalanche diode
positioned into a 50 ohm system. The noise source is divided into a dc
section including a voltage converter and a current regulator, and an RF
section which includes the noise generator, a matching network and an
attenuator.

The +28 volts supplies a 5.6 kHz oscillator which is rectified as the
supply for the constant current source to produce a controlled noise level
output. The current regulator controls through the noise generator diode
producing a known level of broadband noise that is constant for a supply
voltage of 27 to 29 volts.

Figure 1-11

Simplified Diagram of the Noise Source

Troubleshooting

Check the connectors. If there is no apparent damage to the connectors,
perform one of the operator’s checks described in the Operation section of
this manual. If the noise source’s output does not fall within the stated
range, or if the connectors are damaged, return the unit to Agilent
Technologies for repair.

BNC

Input

≈

5.6kHz

Oscillator

Voltage

Converter

Current

Regulator

Matching Network

and Noise Generator

DC Block

Attenuator

Output

«
...
34
35
36
37
38
...
»

Содержание 346A

Страница 1: ...ns 001 002 and 004 Serial Numbers Instruments with serial prefixes 4124A and above are supplied with the noise source ENR data preloaded on diskette see Chapters 3 4 Manufacturing Part Number 00346 90148 June 2013 Supersedes June 2009 Copyright 2001 2013 Agilent Technologies ...

Страница 2: ...actory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology and or The United Kingdom National Physics Laboratories to the extent allowed by the Institution s calibration facility and to the calibration facilities of other International Standards Organization members Warranty This Agilent Technolo...

Страница 3: ...ce by Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Exclusive Remedies THE REMEDIES PR...

Страница 4: ...t proceed beyond a warning until the indicated conditions are fully understood and met CAUTION A caution calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in damage or the destruction of part or all of the equipment Do not proceed beyond a caution until the indicated conditions are fully understood and met ...

Страница 5: ...v Declaration of Comformity A copy of the Manufacturer s European Declaration of Conformity for this instrument can be obtained by contacting your local Agilent Technologies sales repre sentative ...

Страница 6: ...13 Initial Inspection 13 Original Packaging 14 Mating Connectors 14 Storage and Shipping Environment 14 Operation 15 Operating Environment 16 Recommended Test Equipment 16 Operator s Check 17 Operator s Maintenance 22 Performance Tests 24 Adjustments 25 Replaceable Parts 26 Replaceable Parts List 27 Service 29 Principles of Operation 29 Troubleshooting 29 Repair 30 Returning a Noise Source for Cal...

Страница 7: ...ne Surfaces 53 Precision 7 mm Connectors 54 Sexed Connectors 55 Cleaning 57 Compressed Air 57 Cleaning Alcohol 57 Precision 7 mm Connectors 58 Cleaning Interior Surfaces 59 Drying Connectors 60 Mechanical Inspection Connector Gages 61 Mechanical Specifications 62 Precision 7mm Connectors 62 Sexed Connectors 63 50 Ohm Type N Connectors 63 75 Ohm Type N Connectors 64 Using Connector Gages 65 Inspect...

Страница 8: ...1 1 General Information ...

Страница 9: ...e 4 and page 5 are performance standards or limits against which the noise source may be tested These specifications for the noise source when used with a Noise Figure Analyzer are ONLY valid if the analyzer has been allowed to meet its specified warm up time of 60 minutes ENR expanded uncertainty analysis and supplemental characteristics are not specifications but are typical characteristics incl...

Страница 10: ...Hz 26 5 GHz 0 oC to 55 oC 1 ENR values are given at cardinal frequency points over the frequency range of each noise source Calibrated values at cardinal frequencies printed on each noise source label and on a separate report supplied with each Agilent 346 Noise Source Specifications are valid at calibration temperature only 346A 4 5 6 5 dB 346B 14 16 dB 346C 12 17 dB ...

Страница 11: ...ON OFF States Instrument model Frequency Range GHz Maximum Standing Wave Ratio SWR Reflection Coefficient Rho r 346A B1 0 01 0 03 1 3 1 0 13 0 03 5 0 1 15 1 0 07 5 0 18 0 1 25 1 0 11 346C 0 01 18 0 1 25 1 0 11 18 0 26 5 1 35 1 0 15 1 Maximum change in complex reflection coefficient between source ON and source OFF at all frequencies for 346A only 0 01 ...

Страница 12: ...Weight 50 ohm nominal 1 Watt 28 1 V 346A B 60 mA peak 30 mA average for source ON 346C 45 mA 1 For correct connector usage refer Table A 2 for the torque settings 346 Output APC 3 5 male standard1 346 Input Bias BNC f 1 Also mates with female SMA connectors See option information for other connector styles 140 x 21 x 31mm 5 5 x 0 8 x 1 2 in 0 1 kg 3 5 oz ...

Страница 13: ...States National Institute of Standards and Technology NIST and or The United Kingdom National Physics Laboratories NPL Agilent therefore reserve the right to change the overall expanded uncertainties based on changes in uncertainty values within the National Standards Institutes Uncertainties are valid at ambient temperature 23 C 1 C 296K only A typical characteristic plot of ENR U Y versus each c...

Страница 14: ...ification Instrument model Frequency GHz ENR Uncertainty dB 1 346A 0 01 1 5 0 21 1 5 3 0 0 20 3 0 7 0 0 20 7 0 18 0 0 23 346B 0 01 1 5 0 20 1 5 3 0 0 19 3 0 7 0 0 20 7 0 18 0 0 23 346C 0 01 1 5 0 22 1 5 3 0 0 19 3 0 7 0 0 20 7 0 18 0 0 28 18 0 26 5 0 34 1 Characteristic values are met or bettered by 90 of instruments with 90 confidence ...

Страница 15: ...emperature 0 01 dB C for 30 MHz to 26 5 GHz ENR variation with voltage Internal current regulator for 0 02 dB variation for 28 1 V Switching speed For repetitive operation in previous state for less than 5 seconds Turn on 20 µs Turn off 80 µs For single shot operation in previous state more than 5 seconds Turn on 3 ms Turn off 80 µs ...

Страница 16: ...ion that explains how to adapt this manual to the newer noise source In addition to change information the supplement may contain information for correcting errors in the manual The supplement is identified with the manual print date and part number both of which appear on the manual title page For information concerning a serial number prefix that is not listed on the title page in the Manual Cha...

Страница 17: ...source see Figure 1 2 ENR references power on to the noise power that exists at 290 Kelvin 17 C In addition a separate calibration sheet showing the complex reflection coefficient in both the on and off states is included with each instrument All three models are provided with a BNC female connector for power input The output connector is a male APC 3 5 on the standard noise sources Type N and APC...

Страница 18: ...al ENR is 6 dB over the specified frequency range Nominal ENR is 15 dB over the specified frequency range Nominal ENR is 15 dB over the specified frequency range Not directly usable for Agilent HP 8970A IF attenuator calibration Special Function 33 10 dB of gain is required Suitable for Agilent HP 8970A IF attenuator calibration Special Function 33 Suitable for Agilent HP 8970A IF attenuator calib...

Страница 19: ...e Wrench APC 3 5 NOTE Agilent HP Model 346B Noise Sources with serial prefixes of 2037A and below have an APC 3 5 connector of a different configuration See Figure 1 3 The 9 16 torque wrench will not fit these older models Figure 1 3 Agilent HP Noise source with Older APC 3 5 Connector Options The Agilent 346A and 346B Noise Sources are available with the following output connector options Option ...

Страница 20: ...r for damage Inspect the noise source for mechanical damage incurred in transit If the shipping container or cushioning material is damaged it should be kept until the contents of the shipment have been checked for completeness and the noise source has been mechanically and electrically checked If the contents are incomplete if there is mechanical damage or a defect or if the noise source does not...

Страница 21: ...ny correspondence refer to the noise sources by model number and serial number Mating Connectors The noise sources can be mated with other instrumentation having the connectors listed in Table 1 5 Connectors That Can Be Mated With the Noise Sources Table 1 5 Storage and Shipping Environment The noise sources should be stored in a clean dry environment The following environmental limitations apply ...

Страница 22: ...ct the noise source from damage when connected to any system where a dc voltage is present on the output center conductor Noise figure measurements of devices such as amplifiers mixers transistors and receivers can be made using the noise source with a noise figure meter Figure 1 4 depicts a simple test setup for a noise figure measurement NOTE The noise figure meter must have a 28 1 V switched su...

Страница 23: ...ed to perform an operational verification check Recommended Test Equipment For Operator s Checks Table 1 6 Check No Instrument Critical Specification Recommended Model 1 Power Meter and Power Sensor Minimum Sensitivity 0 1 nW Frequency Range 10 MHz to 18 GHz Agilent HP E4418A with Agilent HP 8481D or E4412A or E9300A Power Supply Voltage 28 0 1 0 V Current 100 mA Agilent HP 6028A 2 Noise Figure Me...

Страница 24: ...on Table 1 6 shows the recommended test equipment used for each check Operator s Check with Power Meter Check 1 Step 1 Connect the equipment as shown in Figure 1 5 Figure 1 5 Operator s Check Test Setup 1 Step 2 Turn the power supply OFF Zero the power meter Step 3 Turn the power supply ON 28 V Measure the power output with the noise source on Step 4 Verify that the result of the measurement is wi...

Страница 25: ...ning in the Agilent HP 8970B Operating Manual Step 4 Enter special function 5 3 to enable the instrument for spot ENR entry See Special Functions in the Agilent HP 8970B Operating Manual Step 5 Enter the ENR at 100 MHz from the noise source calibration label See Spot ENR Thot and TCold in the Agilent HP 8970B Operating Manual Step 6 Confirm that the noise source is operating correctly The noise fi...

Страница 26: ... proceeding NOTE The preset condition used is the NFA default of Preset Factory Step 3 Connect the 346A B C to the NFA Input port using a BNC cable as shown in Figure 1 7 Figure 1 7 Operator s Check Test Setup 2b Step 4 Press the ENR key Step 5 Press the ENR Table menu key Step 6 Press the Edit Table menu key Step 7 Press the Clear Table menu key Step 8 Enter 100 MHz in the Frequency column of the...

Страница 27: ...Step 14 Press the Fixed Frequency menu key Enter 100 MHz as a fixed frequency value by pressing the 1 0 0 numeric keys followed by pressing the MHz menu key Step 15 Press the Sweep key Step 16 Press the Manual Meas menu key Step 17 Press the Manual State menu key and set it to Manual State On Step 18 Press the Noise Source menu key and set it to Noise Source On Step 19 Press the IF Att menu key an...

Страница 28: ...he Noise Source menu key and set it to Noise Source Off Step 22 Monitor the power value which appears in the manual measurement screen Figure 1 9 shows a typical example of this NOTE The monitored value is only to be used to indicate if the 346A B C is switching the Excess Noise On and Off by showing a change in power value ...

Страница 29: ... of the maintenance which should be performed by the user By following the general connector care practices outlined below the life of the connector can be greatly extended Connectors should be properly torqued as shown below Always tighten or loosen a connector by rotating only the nut Never rotate the noise source body Connector Type Torque Specifications N 1 3 N m l2 in lb APC 7 1 3 N m 12 in l...

Страница 30: ...r or spread fingers on the APC 3 5 or Type N connectors Support the cable or component attached to the connector When using APC 7 connectors the nut of one connector should always be backed off completely and the nut on the mating connector should be tightened Never set an APC 7 connector on its mating surface Before storage always screw the nut out to protect the surfaces Be sure the connectors a...

Страница 31: ... test equipment involved there are no recommended performance tests for the user to perform Return the noise sources to Agilent Technologies when tests are required to verify its performance and for periodic re calibration The suggested interval before initial re calibration is one year ...

Страница 32: ...Chapter 1 25 General Information Adjustments Adjustments There are no adjustments that can be made on the noise sources by the user ...

Страница 33: ... is opened and parts replaced the Noise Source will require calibration NOTE Due to a parts change adjustment of the bias current may be necessary for the product to meet its ENR specifications when parts are replaced in older units Installation Note 00346 90137 details the adjustment process for the 346A and 346B Installation Note 00346 90140 details the adjustment process for the 346C Both are s...

Страница 34: ...0346 60154 00346 60027 00346 60157 346C Std 00346 60021 00346 60155 00346 60027 00346 60158 Part Number Label Descriptions 00346 80006 346A Label Caution 00346 80007 346BA Label Caution 00346 80008 346C Label Noise 00346 80012 Label Blank ENR Model Option Bulkhead RF NoiseCartridge Kit Serial Prefix MY SG US5322 Attenuator Kit 346A Std Option 001 Option 002 Option 004 00346 60168 00346 60194 00346...

Страница 35: ...28 Chapter1 General Information Replaceable Parts Figure 1 10 Preparing for Parts Removal Replacement ...

Страница 36: ... kHz oscillator which is rectified as the supply for the constant current source to produce a controlled noise level output The current regulator controls through the noise generator diode producing a known level of broadband noise that is constant for a supply voltage of 27 to 29 volts Figure 1 11 Simplified Diagram of the Noise Source Troubleshooting Check the connectors If there is no apparent ...

Страница 37: ...g a 346 or Noise Source to Agilent Technologies for repair or calibration please specify whether an ENR Data Diskette is needed When the 346 is used with an Agilent Noise Figure Analyzer NFA the ENR Data Diskette is used to automatically load the ENR values into memory When the 346 is used with an 8970A B Noise Figure Meter you must enter the ENR values manually and the ENR Data Diskette is not ne...

Страница 38: ...Marketing Organization tel 31 20 547 2000 JAPAN Agilent Technologies Japan Ltd tel 81 426 56 7832 fax 81 426 56 7840 LATIN AMERICA Agilent Technologies Latin America Region Headquarters USA tel 305 267 4245 fax 305 267 4286 AUSTRALIA NEW ZEALAND Agilent Technologies Australia Pty Ltd tel 1 800 629 4852 Australia fax 61 3 9272 0749 Australia tel 0 800 738 378 New Zealand fax 64 4 802 6881 New Zeala...

Страница 39: ...33 2 Manual Changes This chapter contains information for adapting this manual to Agilent HP 346B Noise Sources with serial number prefixes of 2015A and 1935A ...

Страница 40: ...h is higher in value than those listed on the title page of this manual it may be documented in a yellow MANUAL CHANGES supplement For additional information refer to Instruments Covered by Manual in the General Information section of this manual Change A Table 1 2 Supplemental Characteristics Change Switching Speed for both repetitive operation and single shot operation to read Turn off 140 µs Ta...

Страница 41: ...35 3 Using the ENR Data Diskette ...

Страница 42: ...of the ENR values Additionally you can easily open the ENR files using a standard text editor and the files are easy to interpret and create This chapter covers the following Loading the ENR Data from Diskette Saving the ENR Data to the Noise Figure Analyzer s Internal Memory Copying the ENR Data from Diskette to the Noise Figure Analyzer s Internal Memory NOTE The following procedures do not appl...

Страница 43: ...e used for calibration If you intend to use the same ENR table for calibration and measurement then set the ENR table as Meas Table The Noise Figure Analyzer allows you to use the same or separate ENR tables for calibration and measurement as required For more details on specifying Meas Table and Cal Table see the Noise Figure Analyzer User s Guide Step 5 Press the Select menu key and use the arro...

Страница 44: ...e next four digits for example 0100 show the calibration date For example0100 shows a calibration date of January 2000 The last three digits for example 123 are the last 3 digits of the serial number of the Noise Source The file extension is enr to indicate ENR file format Once the ENR file is loaded from diskette to verify that the ENR data is correct press the ENR key then press the ENR Table me...

Страница 45: ... Using the ENR Data Diskette Loading the ENR Data from Diskette Model ID are correct and compare the Frequency and ENR values with the supplied Calibration Sheet or the data printed on the body of the Noise Source ...

Страница 46: ...the same or separate ENR tables for calibration and measurement as required For more details on using ENR tables see the Noise Figure Analyzer User s Guide When the ENR table is selected the Alpha Editor is now presented to you allowing you to specify a name for the file If required you can use the numeric keypad to enter numbers in the filename Note that you can also use the default filename whic...

Страница 47: ...the File key and press the File Manager menu key Step 4 Press the Copy menu key The file system is now presented to you Step 5 Press the ENR menu key to set the file type and format to ENR Step 6 Set the From Path field to A use the down arrow key to highlight the ENR file and the Select key to select it for copying The filename you are going to copy now appears in the From Name field Step 7 Press...

Страница 48: ...43 4 ENR File Format ...

Страница 49: ...e must be less then 100 characters long excluding the terminator Lines containing only whitespace tab or space character are ignored Each line is interpreted as one of three types of record Comment Header Field ENR Data Comment Records A comment record must have either a or as the first character in the line The entire line is ignored Comment records can appear at any point within the file Header ...

Страница 50: ...wing header fields are also allowed Note that only the first two Serialnumber and Model are currently used by the Noise Figure Analyzer Table 4 1 Mandatory header fields Fieldname Description OptionalValue Description Example Filetype Indicates the type of file ENR Only ENR is allowed for ENR data files Filetype ENR Version Indicates the version of the file format which applies to this file versio...

Страница 51: ...odel identifies the noise source model number modelcode model code string Model 346B Option Identifies any model code option optioncode option code string Option 001 Caldate date of calibration of noise source date time formatted date and optional time Caldate 19991202 09 15 30 Calduedate indicates date when next calibration of noise source is due date time formatted date and optional time Caldued...

Страница 52: ...ptional exponent The exponent consists of the e or E followed by an optional sign followed by between one and three digits Frequency fields The frequency field Freq is the frequency at which the ENR amplitude was measured The frequency unit field Funit is optional The default unit is Hz Valid units are Hz kHz MHz GHz THz Units are not case sensitive ENR fields The ENR amplitude ENR is the measured...

Страница 53: ...grees with noise source on reflection angle with noise source off reflection angle degrees with noise source off If any reflection coefficient data is supplied then all four fields must be present Note that the file format requires that the ENR uncertainty field must be present before any reflection data The reflection coefficient uncertainty Runcert is an optional parameter Reflection coefficient...

Страница 54: ...12 Firmware Revision A 00 01 13 37 07 Mar 28 2000 Format is Frequency Hz ENR dB Filetype ENR Version 1 0 10000000 15 3500 100000000 15 4230 1000000000 15 2280 2000000000 15 0900 3000000000 14 9600 4000000000 14 8400 5000000000 14 7890 6000000000 14 7500 7000000000 14 7720 8000000000 14 8570 9000000000 14 9580 10000000000 15 0600 11000000000 15 0830 12000000000 15 1950 13000000000 15 2710 140000000...

Страница 55: ...85 7 0266 9 3000 MHz 14 879 172 0267 150 6 0390 129 2 4000 MHz 14 795 173 0130 18 1 0313 106 0 5000 MHz 14 818 179 0359 169 5 0104 99 3 6000 MHz 14 846 181 0556 63 7 0451 104 3 7000 MHz 14 895 180 0430 37 0 0579 2 3 8000 MHz 15 016 198 0232 160 3 0491 123 8 9000 MHz 15 134 201 0122 71 4 0407 107 3 10000 MHz 15 253 194 0080 116 2 0248 15 4 11000 MHz 15 249 243 0241 65 7 0259 144 5 12000 MHz 15 349 ...

Страница 56: ...51 A Caring for Connectors The material contained in this appendix may not be apply to the connector you are using on the instrument ...

Страница 57: ...he latest edition of the HP RF Microwave Test Accessories Catalog for connector part numbers Handling and Storage Microwave connectors must be handled carefully inspected before use and when not in use stored in a way that gives them maximum protection Avoid touching the connector mating plane surfaces and avoid setting the connectors contact end down especially on a hard surface Never store conne...

Страница 58: ...nd in cleaning connectors but it is not required for inspection Obvious Defects and Damage Examine the connectors first for obvious defects or damage badly worn plating deformed threads or bent broken or misaligned center conductors Connector nuts should move smoothly and be free of burrs loose metal particles and rough spots Immediately discard or mark for identification and send away for repair ...

Страница 59: ...e mating plane surface of the connector may indicate that the connector itself is damaged and should not be used Try to determine the cause of the damage before making further connections Precision 7 mm Connectors Precision 7mm connectors among them APC 7 connectors should be inspected visually with the center conductor collets in place and whenever the collet has been removed See Figure A 1 The c...

Страница 60: ...nter conductor contact fingers Figure A 2 and Figure A 3 These are very easily bent or broken and damage to them is not always easy to see Any connector with damaged contact fingers will not make good electrical contact and must be replaced Figure A 2 Precision 3 5mm connectors Outer Conductor Center Conductor Collet Outer Conductor Mating Plane Dielectric Support bead MALE FEMALE Outer Conductor ...

Страница 61: ...56 AppendixA Caring for Connectors Visual Inspection Figure A 3 SMA connectors MALE FEMALE Outer Conductor Mating Plane ...

Страница 62: ...ating plane surfaces can usually be removed with a quick blast of compressed air This is very easy to do and should always be tried first using compressed air from a small pressurized can The stream of air can be directed exactly where it is wanted through a plastic not metal nozzle No hoses or other connections are needed Hold the can upright to avoid spraying liquid along with the vapor Cleaning...

Страница 63: ...a cable calibration or verification standard the easiest way to do this is to put a lint free cleaning cloth flat on a table and put a couple of drops of alcohol in the center of the cloth It should be noted that it is not necessary to remove the collet to use this cleaning method Retract the connector sleeve threads so that the connector interface is exposed Gently press the contact end of the co...

Страница 64: ...s to cut off the sharp tip of a round wooden toothpick or a smaller diameter wooden rod and then to wrap it with a single layer of lint free cleaning cloth Figure A 4 Cleaning interior surfaces NOTE Metal must never be used it will scratch the plated surfaces and in cleaning precision 3 5mm connectors the diameter must not exceed 0 070 in 1 7 mm The wooden handle of a cotton swab for example is to...

Страница 65: ...luminated 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 Blow the connector dry with a gentle stream of clean compressed air and inspect it again under a magnifying glass to be sure that no particles or alcohol residues remain ...

Страница 66: ...le due to wear or damage Connectors on calibration and verification devices should also be gaged whenever they have been used by someone else or on another system or piece of equipment Precision 3 5mm and SMA connectors should be gaged relatively more often than other connectors owing to the ease with which the center pins can be pulled out of specification during disconnection Connectors should a...

Страница 67: ...ade by spring loaded contacts called collets These protrude slightly in front of the outer conductor mating plane when the connectors are apart When the connection is tightened the collets are compressed into the same plane as the outer conductors For this reason two mechanical specifications are generally given for precision 7mm connectors the maximum recession of the center conductor behind the ...

Страница 68: ...oulder of the male contact pin and the tip of the female contact fingers when the connectors are mated In practice this means that no Type N connector pair should be mated when the separation between the tip of the female contact fingers and the shoulder of the male contact pin could be less than zero when the connectors are mated Gage Type N connectors carefully to avoid damage Type N connectors ...

Страница 69: ...onnector This decreases the total center conductor contact separation and should be monitored carefully 75 Ohm Type N Connectors 75Ω Type N connectors differ from 50Ω Type N connectors most significantly in that the center conductor male contact pin and female contact hole are smaller Therefore mating a male 50Ω Type N connector with a female 75Ω Type N connector will destroy the female 75Ω connec...

Страница 70: ...hat you are using the correct connector gage and correct end of the gage calibration block for the connector being measured Hold the gage by the plunger barrel not the dial housing or cap and for male connectors slip the protruding end of the calibration block into the circular bushing on the connector gage For precision 7mm female precision 3 5mm use the flat end of the gage calibration block For...

Страница 71: ...e pointer still does not line up with the zero mark on the gage loosen the dial lock screw and turn the graduated dial until the gage pointer exactly lines up with zero Then retighten the lock screw Figure A 6 Using the connector gage NOTE Gages should be checked often to make sure that the zero setting has not changed Generally when the gage pointer on a gage that has been zeroed recently does no...

Страница 72: ...r Hold the gage by the plunger barrel and slip the gage into the connector so that the gage plunger rests against the center conductor Carefully bring the gage into firm contact with the outer conductor mating plane Apply only enough pressure to the gage so that the gage pointer settles at a reading Gently rock the connector gage within the connector to make sure that the gage and the outer conduc...

Страница 73: ...o assure accurate measurements As you bring one connector up to the other and as you make the actual connection be alert for any sign that the two connectors are not aligned perfectly If you suspect that misalignment has occurred stop and begin again Alignment is especially important in the case of sexed connectors such as precision 3 5mm and SMA connectors to avoid bending or breaking the contact...

Страница 74: ...ke a Preliminary Connection Align the two connectors carefully and engage the connector nut over the exposed connector sleeve threads on the other connector Gently turn the connector nut until a preliminary connection is made Let the connector nut pull the two connectors straight together Do not twist one connector body into the other as you might drive a screw or insert a light bulb as this is ex...

Страница 75: ...s pre set to the correct value for each connector type are included in many Agilent calibration kits and they are also available separately Torque settings are detailed in Table A 2 When using a torque wrench prevent rotation of anything other than the connector nut that is being tightened with the torque wrench Generally this is easy to do by hand all the more so if one of the connectors is fixed...

Страница 76: ... in order to make the connection If necessary use the torque wrench or an open end wrench to start the process but leave the connection finger tight At all times support the devices and the connection to avoid putting lateral bending force on the connectors Complete the disconnection by disconnecting the connector nut completely Table A 2 Recommended Torque Settings Type Description Precision 7mm ...

Страница 77: ...connectors pull the connectors straight apart and be especially careful not to twist the body of any device as you do so Twisting the connection can damage the connector by damaging the center conductors or the interior component parts to which the connectors themselves are attached It can also scrape the plating from the male contact pin or even in rare instances unscrew the male or female contac...

Страница 78: ...d or out of specification SMA connectors can destroy a precision 3 5mm connector even on the very first connection For this reason it is recommended that you use high quality precision adapters sometimes called connector savers whenever more than a few connections are to be made between SMA and precision 3 5mm connectors In most applications two adapters will be required one each at the input and ...

Страница 79: ...3 5mm Precision 7mm female 3 5 mm Precision 7mm male 50Ω Type N Precision 7mm female 50Ω Type N Precision 3 5mm and SMA Male 3 5mm female 3 5mm Male 3 5mm female 3 5 mm Female 3 5mm female 3 5mm Precision 7mm male 3 5mm Precision 7mm female 3 5mm Connector saver male 3 5mm female 3 5 mm Connector saver male 3 5mm male 3 5mm ...

Страница 80: ...ean Extend sleeve or connector nut Use plastic end caps during storage Touch mating plane surfaces Set connectors contact end down Visual Inspection DO DO NOT Inspect each connector carefully before every connection Look for metal particles scratches and dents Use a damaged connector EVER Cleaning DO DO NOT Try compressed air first Clean connector threads Use any abrasives Get liquid onto plastic ...

Страница 81: ...rs before first use Use an out of spec connector Making Connections DO DO NOT Align connectors carefully Make preliminary connection lightly Turn connector nut only to tighten Use a torque wrench for final connection Apply bending force to connection Overtighten preliminary connection Twist or screw in connectors Tighten past break point of torque wrench Table A 4 Principles of Microwave Connector...

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