HP 537A User Manual - Industry Surplus Australia
Contents
1. Dual directional coupler 718D 719D 110 MHz to 2 GHz 1 7 to 12 4 GHz Detectors 2 required Modulator Swept amlitude analyzer oscilloscope Coaxial short Type N female Type N male APC 7 Low Pass Filter s 700 MHz cutoff 1 2 GHz cutoff 2 2 GHz cutoff 4 1 GHz cutoff Termination s APC 7 Type N male 1 Two single directional couplers connected as a dual directional coupler can also be used 4 Agilent 537A Operating Manual Procedure Age c d Seu p SS NO 10 11 12 13 14 15 16 Performance Test Connect the equipment as shown in Figure 2 Set the analyzer control to 0 dB Set CHANNEL A OFFSET CAL switch to OFF Press CHANNEL A DISPLAY POSITION push button Adjust CHANNEL A screwdriver adjustment marked POSITION to place trace on the center graticule Increase resolution and make fine adjustment Place short on reflectometer Press CHANNEL A push buttons marked DISPLAY R and 10 dB DIV Set the sweep oscillator to sweep the band of interest Adjust the sweep oscillator output power level to place the trace on the second graticule below the center graticule Power input is 20 dBm to the R detector Press CHANNEL A push button marked DISPLAY A R Turn CHANNEL A OFFSET CAL control to ON and adjust the OFFSET CAL control to place the trace on the center graticule Increase the dB DIV resolution by steps to 0 25 dB DIV if necessary adjust the OFFSE2. Make sure ring is seated properly on inside groove of dial holder Turn dial holder to stop at high frequency end of dial Insert spring into dial holder Replace cap by compressing spring Note alignment of cap and lead screw See steps 6 thru 9 of disassembly procedure Tighten both No 6 Allen set screws holding cap to lead screws Turn from stop to stop Check for binding or other erratic behavior It may be necessary to make slight adjustments in cap position so that no binding occurs during rotation Turn dial holder counterclockwise toward lower frequency to expose dial retaining set screws Agilent 537A Operating Manual 9 CAUTION Overall Accuracy 10 Place dial on dial holder and check alignment with scribe mark of step 2 11 Tighten both No 6 Allen set screws to hold dial in place Do not tighten excessively as knob may not slip into place over the dial dial holder 12 Turn dial clockwise near the stop at the high frequency end and place both cursors 6 into the dial grooves to indicate approximately 12 4 GHz 13 Carefully replace window making sure that cursors ride in the window grooves 14 Align window with base Window keys must be in the window retention grooves 15 Replace window retaining nut 16 Turn from stop to stop Check for binding or other erratic behavior It may be necessary to make slight adjustments in screw tightness or dial position so that no binding occurs during dial rot
3. 29 fax 800 900 701 India tel 1600 112 626 fax 1600 112 727 fax 1600 113 040 Japan Bench tel 0120 32 0119 alt 4 81 426 56 7799 Japan On Site tel 0120 802 363 alt 4 81 426 56 7498 Singapore tel 1 800 275 0880 fax 4 65 6755 1235 South Korea tel 080 778 0011 fax 080 778 0013 fax 0120 01 2144 fax 81 426 60 8953 fax 65 6755 1214 Taiwan Thailand Malaysia tel 0800 047 669 tel 1 800 2758 5822 tel 1800 880 399 fax 0800 047 667 alt 4 66 2267 5913 fax 1800 801 054 fax 886 3492 0779 fax 1 800 656 336 Europe Austria Belgium Denmark Finland tel 0820 87 44 11 tel 32 0 2 404 9340 tel 45 7013 1515 tel 358 10 855 2100 fax 0820 87 44 22 alt 32 0 2 404 9000 alt 45 7013 7313 fax 358 0 10 855 2923 fax 32 0 2 404 9395 fax 45 7013 1555 France Germany Ireland Israel tel 0825 010 700 alt 33 0 1 6453 5623 fax 0825 010 701 tel 01805 24 6333 alt 01805 24 6330 fax 01805 24 6336 tel 353 0 1 890 924 204 alt 353 0 1 890 924 206 fax 353 0 1 890 924 024 tel 972 3 9288 500 fax 972 3 9288 501 Italy tel 39 0 2 9260 8484 fax 39 0 2 9544 1175 Luxemburg tel 432 0 2 404 9340 alt 32 0 2 404 9000 fax 4 32 0 2 404 9395 Netherlands tel 31 0 20 547 2111 alt 31 0 20 547 2000 fax 31 0 20 547 2190 Russia tel 7 095 7
4. 6 to 12 4 GHz range appropriate RF plugins Output atleast 47 dBM Directional Coupler Frequency 1 7 to 12 4 GHZ 779D PT Directivity 226 dB Crystal Detector Frequency 0 96 to 12 4 GHZ PT Sensitivity 20 4 mV uW Oscilloscope Vert Sens lt 20 mV dm Horiz PT Sensitivity 1 V cm Counter Frequency 0 96 to 12 4 GHZ PT Sensitivity 7 dBm 1 P performance tests T troubleshooting For dial stop gear replacement and or instrument recalibration refer to Figure 4 on page 12 For any other repair needs contact your local Agilent Technologies Sales and Service office for instructions and assistance 537A reflection coefficient off resonance 0 35 2 0 SWR 9 5 dB return loss As shown in Figure 2 on page 4 two detectors are connected together with a modulator swept amplitude analyzer and a dual directional coupler in a reflectometer test setup The reflectometer is calibrated using a short The 537A coaxial frequency meter under test is connected and the return measured Agilent 537A Operating Manual 3 Performance Test SWEEP OSCILLATOR LOW PASS FILTER MODULATOR Figure2 Return Loss Test Setup Table 3 Equipment DURL DIRECTIONRL COUPLER SWEPT AMPLITUDE RNRLYZER OSCILLOSCOPE MODULATOR DRIVE 27 8 kHz TERNINATION Instrument Type Suggested Agilent Model GHz or Connector type Sweep oscillator 8620C mainframe with appropriate RF plugins
5. 97 3963 alt 7 095 797 3900 fax 7 095 797 3901 Spain tel 34 91 631 3300 alt 34 91 631 3000 fax 34 91 631 3301 Sweden tel 0200 88 22 55 alt 46 0 8 5064 8686 fax 020 120 2266 Switzerland French tel 0800 80 5353 opt 2 alt 33 0 1 6453 5623 fax 41 0 22 567 5313 Switzerland German tel 0800 80 5353 opt 1 alt 49 0 7031 464 6333 fax 41 0 1 272 7373 Switzerland Italian tel 0800 80 5353 opt 3 alt 4 39 0 2 9260 8484 fax 4 41 0 22 567 5314 United Kingdom tel 444 0 7004 666666 alt 4 44 0 7004 123123 fax 44 0 7004 444555 tel primary telephone number alt alternate telephone number fax FAX number in country number 11 16 04 WARNING CAUTION Instrument Markings Safety and Regulatory Information Review this product and related documentation to familiarize yourself with safety markings and instructions before you operate the instrument This product has been designed and tested in accordance with international standards The WARNING notice denotes a hazard It calls attention to a procedure practice or the like that if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met The CAUTION notice denotes a hazard It calls attention to an operating procedu
6. GHz Reflection coefficient off resonance 0 33 2 0 SWR 9 5 dB return lost Calibration increments 10 MHz Dimensions Height 5 3 4 in 146 mm diametri 3 1 2 in 89 mm Weight 3 1 2 Ib 1 6 kg Dip at resonance 1 dB minimum Dial accuracy 2 0 1 1 Width including connector 4 5 8in 118 mm 2 Overall Accuracy 30 1796 which includes allowance of 0 02 for 0 to 100 relative humidity 30 0016 per xC from 13 to 33xC and 0 03 backlash A detector and indicator are required to indicate the dip in coaxial line power at resonance It is recommended that 10 dB of attenuation be placed between the signal source and the frequency meter If insufficient power is available to use a 10 dB attenuator an attenuator offering less attenuation may be used to a minimum of 3 dB The attenuator prevents a shift in the frequency of the signal source due to line impedance changes at resonance Agilent 537A Operating Manual 1 CAUTION Figure 1 Connectors Overview The detector indicator combination can be a thermistor mount and power meter such as the Agilent 478A and 432A or a crystal detector and SWR meter If a SWR meter is used as the indicator the signal source must be modulated at 1000 Hz sine or square wave modulation For visual display an oscilloscope can be used as the indicator When using an oscilloscope for swept frequency displays be sure to sweep the oscilloscope at the same rate as the signal source Resonance will b
7. T CAL control to return the trace to the center graticule Disconnect the short from the reflectometer test port Connect the 537A under test to the reflectometer test port by disconnecting the short and inserting the properly terminated 537A under test Use CHANNEL A OFFSET dB thumbwheel to return the trace to the center of the screen or as close as possible Read the return loss at the CHANNEL A OFFSET dB window and on the oscilloscope Return loss is the total indication of both the CHANNEL A OFFSET dB window and the trace on the oscilloscope Add the trace indication to the window reading if the trace is below the center graticule subtract if above Agilent 537A Operating Manual 5 Performance Test 17 Return loss measured should be equal to or greater than the following limits Table 4 Return Loss Limits Lower Limit of Reading Coupler Directivity Specification 26 dB 30 dB 40 dB 20 8 dB 27 8 dB 24 6 dB 21 9 dB 9 5 dB 11 0 dB 10 5 dB 9 8 dB 18 If the above limits are not met test the 537A using a slotted line at the frequency in question 6 Agilent 537A Operating Manual Description OSCILLOSCOPE Figure 3 Table 5 Overall Accuracy CRYSTAL DETECTOR Overall Accuracy Specification for the 537A 0 17 overall accuracy A sweep oscillator 537A under test detector and oscilloscope are connected in series The sweep oscillator is set to AF to sweep the ban
8. ation 17 When assured of smooth operation check calibration Calibration should be reasonably close if care was taken in alignment of the cap lead screw and dial Replace knob 10 Agilent 537A Operating Manual Calibration Alignment Procedure Calibration Procedure Calibration Procedure Test equipment recommended for testing the 537A are listed in Table 2 on page 3 Test equipment other than that recommended may be substituted if their performance equals or exceeds the minimum required specifications given Figure 2 on page 4 and Figure 3 on page 7 list procedures for checking instrument specifications If dial accuracy is not within listed specifications adjust 537A as detailed in the Calibration Alignment Procedure as follows If dial accuracy of the 537A is not within specifications The following procedure can be used for readjustment 1 Remove knob 1 2 Remove base 11 retaining screws With base retaining screws removed place the 537A in upright position and make electrical hookup for OVERALL ACCURACY TEST 3 In the original high frequency end setting 12 4 GHz is set almost one half turn about 150 degrees counterclockwise from the stop The dial 5 is held to the dial holder 10 by two set screws 9 Check frequency accuracy at 12 4 GHz and if not within overall accuracy specification loosen set screws 9 and slip dial The set screws are loosened from inside the dial holder the dial must be rotate
9. d about 6 turns before the access holes become visible 4 The low frequency end adjustment is made at 3 7 GHz by moving capacitive load with two cap screws This adjustment should not change the high frequency setting 5 Check dial accuracy in vicinity of 3 7 to 4 1 and 8 2 12 0 and 12 4 GHz Reposition the dial or capacitive load if a compromise is necessary 6 If accuracy specifications cannot be met further disassembly is not recommended The unit should be returned to your local Agilent Technologies Sales and Service office 7 Replace base and knob Agilent 537A Operating Manual 11 Calibration Procedure ENLARGED AND ROTATED 180 Figure 4 537A Repair and Recalibration 12 Agilent 537A Operating Manual Replaceable Parts Replaceable Parts Table 6 Replaceable Parts Reference Description Part Number Quantity Designator 1 Knob 5040 6950 1 2 Screw set 8 32 x 3 16 3030 0001 2 3 Nut dial window retainer 00532 40005 1 4 Window K532A 18 1 5 Dial 00537 20031 1 6 Cursor K532A 20 2 7 Cap R532A 16 1 8 Spring lead screw 1460 0044 1 9 Screw set 6 32 x 1 4 3030 0106 2 10 Holder dial P532A 4 1 11 Base 00537 20029 1 12 Ring retaining 0510 0069 1 13 Coupling loop assembly 00537 601 14 Bearing ball 1410 0005 1 15 Window support 00537 206 16 Screw fill Hd 2 56 x 1 4 0520 0012 17 Shaft stop gear P532A 5 1 18 Gear stop P532A 19 1 19 Rin
10. d in question The 537A is set to the frequency in question and the notch located on the trace The sweep oscillator is set to CW and adjusted to the center of the absorption notch of the 537A The frequency of the sweep oscillator is measured with a counter and compared with the specifications in Table 1 on page 1 The sweep oscillator is set to automatic sweep and the notch depth across the band is checked COUNTER SHEEP OSCILLATOR DIRECTIONAL COUPLER 537A UNDER TEST Overall Accuracy Test Setup Test Instruments Instrument Type Suggested Agilent Model Frequency Range GHz Sweep Oscillator 8620C mainframe with appropriate RF plugins 0 5 to 2 4 86222A B 1 7 to 4 3 86235A 3 6 to 8 6 86240C 5 9 to 12 4 86245A Directional Coupler 779D Crystal Detector 423A Oscilloscope 1740A Counter 5342A Agilent 537A Operating Manual 7 Procedure Stop Gear Replacement Procedure Disassembly Procedure Overall Accuracy Connect the equipment as shown in Figure 3 on page 7 Set oscilloscope for a vertical sensitivity of about 02 V cm ac and horizontal sensitivity of about 1 V cm Set sweep oscillator for F automatic sweep of about 3 8 GHz 12 MHz for 537A Set the 537A to 3 8 GHz Locate the frequency meter notch and center it on the display by adjusting the sweep limits on the sweep oscillator Set the sweep oscillator to CW and adjust the frequency to the center of the notch lowest in
11. dication on the oscilloscope Read the frequency on the counter Frequency should be within the specifications given in Table 1 on page 1 Repeat above procedure every 200 MHz across the band Set sweep oscillator to automatic sweep and tune the 537A across frequency range of sweep oscillator The notch travel across the frequency range should cause at least the notch depth given in Table 1 1 Upon completion of the stop gear replacement it will be necessary to check the frequency calibration of the instrument The following special tool is required for this procedure A Waldes No 3 Truarc pliers with tips bent 45 degrees For the following procedures refer to Figure 4 on page 12 and Figure 1 on page 1 Numbers in parentheses refer to numbers on drawing in Figure 4 To replace the stop gear proceed as follows 1 2 Remove knob 1 Scribe dial position to give approximate location of dial on dial holder Do not use pencil as this may be inadvertently erased Unscrew dial window retaining nut 3 Remove nut and window Loosen two No 6 Allen set screws 9 holding dial These are located on the inside or dial holder 10 Turn dial holder until cap 7 is approximately flush with top of dial holder near high frequency stop position Scribe a line from lead screw on plunger to cap for later alignment 8 Agilent 537A Operating Manual CAUTION Reassembly Procedure Overall Accuracy Loosen both No 6 Alle
12. e noted as a dip in the oscilloscope pattern Do NOT run dial into stops at either end of dial If frequency measurement is one part of the measurement procedure be sure to move meter off resonance before proceeding with other measurements Female Connector Outer Conductor Mating Plane Center Conductor Mating Plane Pin Depth 5 26mm 5 10mm 0 207inch 0 201inch Type N Connector Dimensions The input and output connectors are type N female and are compatible with connectors whose dimensions conform to MIL C 39012 N female Pin Depth 0 207 to 0 201 in effective 0 to 0 006 2 Agilent 537A Operating Manual Purpose Recommended Test Equipment Table 2 Maintenance Return Loss Specifications Description Performance Test Performance Test The procedures listed in Table 2 and Figure 3 on page 7 check performance for incoming inspection periodic evaluation and calibration The tests are performed without access to the instrument interior The performance standards are contained in Table 1 on page 1 Test instruments required to make the performance checks are listed in Table 2 Instruments other than those listed may be used provided their performance equals or exceeds the critical specifications given Recommended Test Equipment Instrument Critical Specifications Suggested Agilent Model Use Sweep Oscillator CW and swept frequency signalin 8620C Mainframe with PT 0 9
13. g retaining 0510 0070 1 20 Cork ring 2190 0345 1 1 See Figure 4 for parts location Agilent 537A Operating Manual 13
14. n set screws 9 holding cap in place on lead screw These are internal and may be found by looking through the two inspection holes in dial holder These are spaced approximately 90 degrees apart While holding cap in place back out both screws sufficiently to allow removal of cap This should be approximately three full turns of the Allen screw If spring and cap jump out replace them with big diameter end of spring at bottom Do not turn or remove plunger 10 11 12 Turn the 537A upside down and remove the Truarc retaining ring holding dial holder 3 This requires special Truarc pliers It may be necessary to adapt some of your own tools to the job of removing the retaining ring Lift 537A off dial holder and place base assembly upright again Examine both sections for pieces of broken stop gear Inspect bearing and gear rack to make sure that these hasnt been damaged by portions of the broken stop gear If any of the internal workings other than stop gear have been damaged it will be necessary to return to the factory for a major rebuilding Replace dial holder taking care not to damage gears when engaging stop gear with gear rack Check rotation of the dial holder There should be approximately 11 1 4 turns of the dial If not disengage and try again with a new gear position When the stop gear is positioned to give approximately 11 1 4 turns from stop to stop secure dial holder with the Truarc retaining ring
15. oes Agilent Technologies 537A Coaxial Frequency Meter Operating Note 00536 90013 Manual part number 00536 90013 Printed in USA March 2001 Supersedes May 2000 Documentation Warranty THE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED AS IS AND IS SUBJ ECT TO BEING CHANGED WITHOUT NOTICE IN FUTURE EDITIONS FUR THER TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW AGILENT DISCLAIMS ALL WARRANTIES EITHER EXPRESS OR IMPLIED WITH REGARD TO THIS MANUAL AND ANY INFORMATION CONTAINED HEREIN INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT NESS FOR A PARTICULAR PURPOSE AGILENT SHALL NOT BE LIABLE FOR ERRORS OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING USE OR PERFORMANCE OF THIS DOCUMENT OR ANY INFORMATION CONTAINED HEREIN SHOULD AGILENT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH WARRANTY TERMS COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH THESE TERMS THE WAR RANTY TERMS IN THE SEPARATE AGREEMENT WILL CONTROL DFARS Restricted Rights Notice If software is for usein the performance of a U S Government prime contract or subcontract Software is delivered and licensed as Commercial computer software as defined in DFAR 252 227 7014 J une 1995 or as a commercial item as defined in FAR 2 101 a or as Restricted computer software as defined in FAR 52 227 19 J une 1987 or any equivalent agency regulation or contract clause U
16. re practice or the like which if not correctly performed or adhered to could result in damage to the product or loss of important data Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met When you see this symbol on your instrument you should refer to the instrument s instruction manual for important information 4 This symbol indicates hazardous voltages MNI The laser radiation symbol is marked on products that have a laser output This symbol indicates that the instrument requires alternating current ac input The CE mark is a registered trademark of the European Community If it is ccompanied by a year it indicates the year the design was proven QD The CSA mark is a registered trademark of the Canadian Standards Association Cn e 1SM1 A This text indicates that the instrument is an Industrial S cientific and Medical Group 1 Class A product CISPER 11 Clause 4 This symbol indicates that the power line switch is ON This symbol indicates that the power line switch is OFF or in STANDBY position Agilent 537A Operating And Service Manual Safety Earth LL This is a Safety Class I product provided with a protective earthing Ground terminal An uninterruptible safety earth ground must be provided from the main power source to the product input wiring terminals power cord or supplied power cord set Whenever it is likely
17. se duplication or disclosure of Software is subject to Agilent Technologies standard commercial license terms and non DOD Departments and Agencies of the U S Government will receive no greater than Restricted Rights as defined in FAR 52 227 19 c 1 2 J une 1987 U S Government users will receive no greater than Limited Rights as defined in FAR 52 227 14 J une 1987 or DFAR 252 227 7015 b 2 November 1995 as applicable in any technical data Printing Copies of Documentation from the Web To print copies of documentation from the Web download the PDF file from the Agilent web site Goto http www agilent com Enter the document s part number located on the title page in the Quick Search box Click GO Click on the hyperlink for the document Click the printer icon located in the tool bar Contacting Agilent This information supersedes all prior HP contact information Online assistance www agilent com find assist Americas Brazil tel 55 11 3351 7012 fax 4 55 11 3351 7024 Canada tel 1 877 894 4414 fax 1 303 662 3369 Mexico tel 1 800 254 2440 fax 1 800 254 4222 United States tel 800 829 4444 alt 1 303 662 3998 fax 800 829 4433 Asia Pacific and Japan Australia tel 1 800 225 574 fax 1 800 681 776 fax 1 800 225 539 China tel 800 810 0508 alt 800 810 0510 fax 800 810 0507 fax 800 810 0362 Hong Kong tel 800 933 2
18. that the protection has been impaired the product must be made inoperative and secured against any unintended operation Before Applying Power Verify that the product is configured to match the available main power source as described in the input power configuration instructions in this manual If this product is to be powered by autotransformer make sure the common terminal is connected to the neutral grounded side of the ac power supply Agilent 537A Operating And Service Manual Description Specifications Measurement Table 1 Overview The Agilent 537A coaxial frequency meter is used for measuring frequency in the 0 96 to 12 4 GHz range Accuracy is obtained from the spiral scale The meter contains a coaxial line coupled to a quarter wavelength coaxial resonant cavity loaded with capacitance at the bottom of the band At resonance power is absorbed by the cavity producing a dip in the coaxial line power The frequency at which this dip occurs is read directly from the dial in gigahertz Tuning is accomplished by moving a piston A precision lead screw which is spring loaded to prevent backlash is used to position the piston in the cavity Due to the design of the cavity its electrical length is extended at lower frequencies and there are no spurious modes The instrument specifications are provided in Table 1 on page 1 Specifications Characteristic Value Frequency range 3 7 to 12 4
Download Pdf Manuals
Related Search