N8975A Option K40 Blockdown Converter Operating and
Contents
1. COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH THESE TERMS THE WARRANTY TERMS IN THE SEPARATE AGREEMENT WILL CONTROL Technology Licenses The hardware and or software described in this document are furnished under a license and may be used or copied only in accordance with the terms of such license U S Government Rights The Software is commercial computer software as defined by Federal Acquisition Regulation FAR 2 101 Pursuant to FAR 12 212 and 27 405 3 and Department of Defense FAR Supplement DFARS 227 7202 the U S government acquires commercial computer software under the same terms by which the software is customarily provided to the public Accordingly Keysight provides the Software to U S government customers under its standard commercial license which is embodied in its End User License Agreement EULA a copy of which can be found at http www keysight com find sweula The license set forth in the EULA represents the exclusive authority by which the U S government may use modify distribute or disclose the Software The EULA and the license set forth therein does not require or permit among other things that Keysight 1 Furnish technical information related to commercial computer software or commercial computer software documentation that is not customarily provided to the public or 2 Relinquish to or othe2. General Information Section 1 07 Equipment Required but not Supplied section 1 07 Equipment Required but not Supplied To form a noise figure measurement system for measurements in the 26 5 to 40 GHz band the additional equipment required N8975A Noise Figure Analyzer 346C KO1 Noise Source Section 1 08 Electrical Equipment Available Waveguide Coax Adapters R281A WR28 to 2 4mm APC Waveguide Noise Source R347B 26 5 to 40GHz Section 1 09 Chassis Slide Mount Kit This kit is used to install one or more instruments in a sliding support shelf Order shelf part number 5063 9255 and slide kit 1494 0015 for a single instrument also order filler panel 5002 3999 Section 1 10 Recommended Test Equipment Table 1 3 lists the test equipment recommended for use in testing adjusting and servicing the Down Converter The Critical Specification column describes the essential requirement for each piece of test equipment Other equipment may be substituted if it meets or exceeds the critical specifications The recommended model column may suggest more than one model The first model shown is usually the least expensive single purpose model Alternate models are suggested with additional features that would be a better choice in some applications Table 1 3 Recommended Test Equipment Instrument Critical Specification Recommended Model Noise Figure Analyzer Noise Figure N8975A or 8970S Measurements 4 5 18 GHz Synt
3. 2 07 Operating Environment The operating environment for the Down Converter should be maintained within the following limitations Specified Temperature Range 15 C to 35 C Operating temperature range 0 C to 50 C Humidity 20 to 80 RH 40 C Altitude lt 2000 meters 6562 feet For indoor use only VENTILATION REQUIREMENTS When installing the instrument in a cabinet the CAUTION convection into and out of the instrument must not be restricted The ambient temperature outside the cabinet must be lest than the maximum operating temperature of the instrument by 4 C for every 100 Watts dissipated in the cabinet If the total power dissipated in the cabinet is greater then 800 Watts then forced convection must be used Section 2 08 Bench Operation The instrument has rubber feet for convenience in bench operation section 2 09 Rack Mounting Rack mounting information is provided with the rack mount kit that is supplied with the instrument section 2 10 Storage and Shipment Environment The instrument should be stored in a clean dry environment The following environment limitations apply to both storage and shipment limitations Temperature 40 C to 70 C Humidity lt 95 relative Altitude lt 15 300 Meters 50 000 feet 16 Chapter 2 Installation Section 2 11 Packaging section 2 11 Packaging The instrument should be stored in a clean dry environment The following environment limitation
4. Figure 6 1 Blockdown Converter Ji R 21 24mm MALE i CIALIS ea KW RF INPLIT E J aram f 5 26 5 40 GHZ Q LA i Pau i i i E 1 3 EA m MALE j rl x RF OUTPUT 18 45 GHZ AM a de 2 a A A2 A WOLTAGE wa REGULATOR i i i Se a cry i A ap aa a RENE A Ai FRONT 83 UNE IN POWER PANEL FILTER FAN SUPPLY SWITCH ASSEMBLY N8975A OPTION K40 BLOCK DOWNCONVERTER BLOCK DIAGRAM Chapter 6 39 Service Section 6 17 Check List Figure 6 2 Internal Assemblies Layout 7 i j p 3 E vi PSU Microwave Dec k f A1 f A2 n A3 FRONT gt B p Filter Board Fan Mount D gt 20 mam E Figure 6 3 Layout of A2 Block Down Converter 40 Chapter 6 Service Section 6 17 Check List Figure 6 4 Troubleshooting Flow Diagram 1 Connect as in Fig 4 2 2 Set Sig Gen to 26 5 GHz 30dB 3 Set Spec an to CF 18GHz and span of 100 MHz NO Possible Faut in Possible Faut in A2 Chapter 6 41 42 Service Section 6 17 Check List Chapter 6 Keysight N8975A Option K40 Blockdown Converter Operating and Service Manual Special Supplement 7 Operating the Down Converter with the 8970B 8971C NF System To operate the Down Converter with the 8970S V Noise Figure Measurement System set up the 8970S V as indicated in Section 3 13 of the 8970B Operating and Service Manual Con
5. KEYSIGHT TECHNOLOGIES Operation Section 3 04 Rear Panel Features A 3 5 mm male connector provides the down converted output to the N8975A Signals of 26 5 GHz to 40 GHz at the RF INPUT are mixed with a fixed 44 5 GHz LO in the N8975A option K40 to produce the down converted 18 GHz to 4 5 GHz output The LOWER SIDEBAND is down converted c Power S1 This switch turns the instrument power supply between stand by and on When it is in the ON 1 position the instrument is operational Section 3 04 Rear Panel Features a Power MP1 Line power module connects the power cord to the Down Converter and contains the line over current protection fuse Center conductor is a chassis connection for safety earth ground b Fuse An F3 15AH fuse is installed for all voltage supplies Section 3 05 Operating Characteristics The Down Converter when used with N8975A Noise Figure Analyzer extends the frequency up into the 26 5 40 GHz band Down Converter Performance Specifications and Supplemental Characteristics are contained in Table 1 1 and Table 1 2 section 3 06 Operator s Maintenance For continued protection against fire hazard replace the line fuse only with the WARNING same type and rating F3 15AH 250V The use of other fuses or materials is prohibited Replacing a defective primary fuse Keysight Part Number 2110 0957 This fuse is located in the line module assembly 20 Chapter 3 Operation Section 3 0
6. nstrumenitisi asse ld A E a e a E E e a 34 SECON 6 05 Pozidrive SCreWwd IVES asisas ia ii ate 35 Section 6 06 HardWare sc rss ssaa pone lesene E ETTE ara fewer ld enke neY UNE meade 35 Section 6 07 Assembly WOCAtONS 2s25082045 n86453 Men ant And EEA SAL hae EEE ROLE BRE eat 35 Section 6108 Pants a a Cable LOCatONS rsisi e iw a ay arate at E E aa Loy E a elia pre AETR E EAE ai dp 35 section O09 Test Poin LOCAtONS cc et eine a dai 35 Section 6 10 Cover Removal oh c so PEM td pete A Gate A AeA 36 Section 6 11 Cleaning INtENA S ccoo cede ei RE i 36 Section 6 12 Six Monti Cleaning 0 04 e cette piper bale boda dhe eee eae a ba Dearie d idi 36 Section 6 13 Twelve Month CleamInG s cocer ad Wiel rind dike od tl tara etd e aah eG ene Sty oa 37 Section 6 14 Overall Troubleshooting s ss cseea epee sete i na 37 Section 6 15 Principlesiof Operation azar caro Ei ye ra ned eee ee ha bad sowed ieee Masao 38 SOCOM 6 16 MMOUDIESHOOUMG iii SA Sow aa a Hee Ode Roe RE pt 38 Secom 6 17 CHECKLIST e Sgi a bec dicerie dare feel ii dab lid aces ae 38 7 Operating the Down Converter with the 8970B 8971C NF System 8 Service Replaceable Parts section 8 01 INTO dUCHON 4 4 sai odes bars dicks ie dd e ante bao 45 Section 8 02 Accessories auna a naana ee 45 Keysight N8975A Option K40 Blockdown Converter Operating and Service Manual Special Supplement 1 General Information Section 1 01 Introduction This Operating and Servi
7. 0 to 50 C Storage 40 to 70 C Table 1 2 Supplemental Characteristics Characteristics Performance Limits Conditions Conversion Gain 18 dB Nominal 33 GHz Humidity 20 80 R H 40 C Altitude 2000 Meters MAX 6562ft Power Consumption 70 VA Max 50 60Hz 100 240V AC Dimensions 88 5mm H x 212 6mm W x 348 3mm D Excluding front and rear panel protrusions Weight Net 4 5 Kg 9 9 lbs Shipping 8 4 Kg 18 5 lbs This instrument is designed for use in an Installation Category Il and Pollution CAUTION Degree 2 environment per IEC 61010 Section 1 03 Safety Consideration This instrument has been designed and tested in accordance with IEC publication 61010 1 2001 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use and has been supplied in a safe condition The instruction documentation contains information and warnings that must be followed by the user to ensure safe operation and to maintain the instrument in a safe condition 8 Chapter 1 General Information Section 1 04 Description This is a safety Class 1 product provided with a protective earthing ground incorporated in the power cord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact Any interruption of the protective conductor inside or outside the instrument is likely to make the instrument dangerous Intentional interruption is prohibited section 1 04 Description The N8975A Opti
8. 6 Operator s Maintenance Clean the cabinet Using a damp cloth only No Operator serviceable parts inside Refer servicing to qualified personnel To WARNING di sit y Figure 3 1 prevent electric shock do not remove covers Front and Rear Panel o r I ome A St LL 9 WARNING no OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO SERVICE TRAINED PERSONNEL WARNING For CONTINUED FIRE PROTECTION USE SPECIFIED LINE FUSE Chapter 3 21 Operation Section 3 07 General Operating Instructions Figure 3 2 Test Set up for Calibration and Measurement of Noise Figure NFA N8975A DOWN CONVERTER N8975AZ K40 N RF OUTPUT Noise Source Drive Output aa A da 346C Option K01 Measure Section 3 07 General Operating Instructions cords auto transformers and devices connected to the instrument should be WARNING Before the instrument is switched on all protective earth terminals extension 22 connected to a protective earth grounded socket Any interruption of the protective earth grounding will cause a potential shock hazard that could result in personal injury Section 3 08 Turn On Procedure If the Down Converter is not plugged in follow these instructions 1 Check the line voltage is correct to operate the Down Converter 2 Plug in the power cable 3 Press the line switch on the front panel to ON Section 3 09 Down C
9. 7 00 20 00 6 50 38 00 20 00 5 50 39 00 20 00 4 50 40 00 20 00 4 5 LO Frequency Accuracy Min MHz Actual Max MHz 17950 18050 30 Chapter 4 Keysight N8975A Option K40 Blockdown Converter Operating and Service Manual Special Supplement 5 Adjustments The N8975A Option K40 has no internal adjustments KEYSIGHT TECHNOLOGIES 31 32 Adjustments Chapter 5 Keysight N8975A Option K40 Blockdown Converter Operating and Service Manual Special Supplement 6 Service Section 6 01 Introduction This section contains information for troubleshooting and repairing the Down Converter Included are block diagrams schematic diagrams principles of operation and procedures for troubleshooting repair disassembly and re assembly Section 6 02 Service Sheets The pages following the service introduction are the service sheets comprising of block diagrams schematics supplemental diagrams theory and troubleshooting information Section 6 03 Safety Considerations The pages following the service introduction are the service sheets comprising of block diagrams schematics supplemental diagrams theory and troubleshooting information a Before Applying Power Verify that the instrument is set to match the available line voltage and that the correct fuse is installed An uninterrupted safety earth ground must be provided from the main power source to the instrument input wiring terminals power cable or supplied powe
10. Environmental ber of years starting with the of the symbol South Korean Class A EMC Declaration AS 2121 AS 2 48542114 0 INE AES AT AAPAN E AA TE 87 o Bo ARA she DI AAAA ADA 4832 AS Bale Mq This equipment is Class A suitable for professional use and is for use in electromagnetic environments outside of the home Chapter 1 Keysight N8975A Option K40 Blockdown Converter Operating and Service Manual Special Supplement 2 Installation Section 2 01 Introduction This section provides the information needed to install the N8975A option K40 Down Converter Included is information pertinent to initial inspection power requirements line voltage selection power cables interconnection environment storage and shipment If this instrument is not used as specified the protection provided by the WARNING equipment could be impaired This instrument must be used in a normal condition in which all means for protection are intact only Appliance Coupler mains input powercord is the power disconnect device Do WARNING not position the instrument such that access to the coupler is impaired Section 2 02 Initial Inspection To avoid hazardous electrical shock do not perform electrical tests when there are WARNING signs of shipping damage to any portion of the outer enclosure covers panels connectors Inspect the shipping container for damage If the shipping container or cushioni
11. Keysight N8975A Option K40 Blockdown Converter KEYSIGHT TECHNOLOGIES Operating and Service Manual Special Supplement Notices Keysight Technologies Inc 2007 2015 No part of this manual may be reproduced in any form or by any means including electronic storage and retrieval or translation into a foreign language without prior agreement and written consent from Keysight Technologies Inc as governed by United States and international copyright laws Trademark Acknowledgments Manual Part Number 8975 90002 Edition Edition 1 July 2015 Supersedes March 2015 Printed in USA Malaysia Published by Keysight Technologies 1400 Fountaingrove Parkway Santa Rosa CA 95403 Warranty THE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED AS IS AND IS SUBJECT TO BEING C HANGED WITHOUT NOTICE IN UTURE EDITIONS FURTHER TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW KEYSIGHT 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 ERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE KEYSIGHT 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 KEYSIGHT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH WARRANTY TERMS
12. PE ede he Hee Reet Res Ate 7 IO2ZSPCCICALIONS ocio ide ode ERE Aerei bbb dx homehedadohehd da 7 JOS Salety CONSI MON st seen tadeant har Prada CER AE n 8 DA DESCrOUOMy ssaa eu ae ede ead ha eee E ERE Pat dag dehy woke ghee eed Lee e kt 9 IOS ODUONS stones ito tt See aad os sate eeu e Sena dpe cance dame esate eee feed ote 9 ILOCCAGCESSONES SUPPUEO cites spia ai ee 9 07 Equipment Required but not Supplied ooooococccccoccoo roer 10 08 Electrical Equipment Available s cesar 10 1 09 Chassis Slide Mount Kitas a dit da 10 I 1OiRecommended Test EQuIPMENt 2 lt 0 0 sae eeed lee Geouwsekoe ye wheas ana 10 Symbols and Label iure Meet diana ee hes Outen ea eed Ae eae Bh eG eed 11 ZO MMW OGUCHOMN e ereen e ao ea atar 3 2 02 Initial INSPECHONI 2 223 456 spirit indebidos dd ted ea dede de dede da S 3 2 03 Power REGUINEIMENIS ascsaprrrciar asar a si AA BEEP RES 4 2 04 Line Voltage and Fuse SELECTION cesc 200 cerca g ie 4 209 POWERCADIES scorsi eiee e eati eee er balle ses ed anne 4 2106 Mating CONNECTIONS actrices RA ee 5 207 Operating ENVIFORMENT piera tradita See Eien eke es 16 208 Bench OperatioNi 2 srssagni atolli beatae apart a 6 AIO RACK MOUNINO ei se na enia el bed ald inate ae eee da omen eat 6 2 10 Storage and Shipment Environment i 16 2 Packaging orario tes di allea tht dee ate ee ees 7 301 INTOdUCHO s sia e oe Hee es COREA EES ers 19 3 02 Panelheatures 2 5 4 5dh4 lt hs c d donde Scat ddr dba dl a add 19 303 Fro
13. REWS M3 5x8mm Keysight Technologies 24 0535 0007 2 NUTS M3 5 Keysight Technologies 25 1251 0670 2 CRIMPS CONT CONN F Keysight Technologies 26 1251 2993 1 CONN SHELL POST 156 Keysight Technologies 27 0535 0023 6 NUT M4 Keysight Technologies 28 2190 0640 7 LOCK WASHERS M4 Keysight Technologies 29 1400 1552 4 ADHESIVE CABLE TIES Keysight Technologies 30 E4418 61027 COVER Keysight Technologies 31 34401 45011 HANDLE Keysight Technologies 32 E4418 20008 REAR FRAME Keysight Technologies 33 34401 86011 RUBBER BUMPER FRONT Keysight Technologies 34 34401 86012 RUBBER BUMPER REAR Keysight Technologies 35 8150 0449 RED WIRE Keysight Technologies 36 8150 0456 BLUE WIRE Keysight Technologies 37 8150 0452 GREEN WIRE Keysight Technologies 38 8975 20001 SEMI RIGID CABLE I P Keysight Technologies 39 8975 20002 SEMI RIGID CABLE O P Keysight Technologies 40 0360 0016 TERMINAL SOLDER Keysight Technologies 41 8150 0005 AR BLACK WIRE Keysight Technologies 42 8975 60001 Block Down Converter Keysight Technologies 43 0515 0433 4 SCREW M4x8mm PAN Keysight Technologies Table 8 2 Accessories ITEM PART NUMBER QTY DESCRIPTION SUPPLIER 44 5063 9240 1 RACK ADAPTER KIT Keysight Technologies 45 1250 2188 1 ADAPTER COAX STR F 2 4 mm Keysight Technologies 46 08971 60127 1 RF CABLE Keysight Technologies 46 Chapter 8 KEYSIGHT TECHNOLOGIES This information is subject to change without notice Keysight Technologies 2007 2015 Edition 1 July 2015 N8975 90002 w
14. RIPTION SUPPLIER 1 E4418 61025 1 CHASSIS Keysight Technologies 2 8975 40001 1 BEZEL Keysight Technologies 3 8975 00001 BASE PLATE Keysight Technologies 4 8975 00002 DC FILTER PLATE Keysight Technologies 5 8975 00008 FRONT PANEL Keysight Technologies 6 8975 80001 REAR PANEL Keysight Technologies 7 8975 00003 2 FAN MOUNTING PLATE Keysight Technologies 8 8975 61005 1 FAN 12VDC Keysight Technologies 9 0380 4210 4 PSU FILTER STANDOFFS Keysight Technologies 10 8975 61006 1 PSU Keysight Technologies 1 5062 6615 CONN CX 2 4 RF INPUT Keysight Technologies 12 2950 0132 1 UT for RF INPUT Keysight Technologies 13 5062 1247 CONN 3 5 IF OUTPUT Keysight Technologies 14 2950 0132 1 UT for above Keysight Technologies 15 2190 0068 2 WASHER for above connectors Keysight Technologies 16 N8975 00016 1 EMI SCRN Keysight Technologies 17 3101 2359 1 Panel push switch Keysight Technologies 18 R281A FG 1 ADAPTER Keysight Technologies KEYSIGHT TECHNOLOGIES 45 Service Replaceable Parts Section 8 02 Accessories Table 8 1 ITEM PART NUMBER QTY DESCRIPTION SUPPLIER 19 08970 60104 1 PCA Filter Assembly Keysight Technologies 20 0515 0886 10 SCREW M3x6mm PAN Keysight Technologies 21 0535 0025 4 NUT M3 Keysight Technologies 22 0515 1111 4 SCREW M3x16mm PAN Keysight Technologies 23 0515 1232 2 SC
15. ame START FREQ STOP FREQ and STEP SIZE that was used for calibration None of the calibrated points can be skipped Also the measurement must be done in the same direction as the calibration for example from start frequency to stop frequency Measurement Accuracy The noise figure of the N8975A K40 test system is in the order of 15 dB So the noise figure plus Gain of the DUT must be much higher than 15 dB for accurate measurement uncertainty If the DUT has low gain and low noise figure then a pre amplifier will be required as part of the system and included in the calibration so that the measurement uncertainty is reduced Section 3 11 Sales and Service Offices An up to date list of Keysight Offices is available through the Keysight Website at URL http www keysight com Chapter 3 Keysight N8975A Option K40 Blockdown Converter Operating and Service Manual Special Supplement Performance Tests Section 4 01 Introduction The procedures in this section test the Down Converter s electrical performance using the specifications of Table 1 1 as performance standards These tests are suitable for incoming inspection troubleshooting and preventative maintenance All tests can be performed without access to the interior of the Down Converter section 4 02 Equipment Required Equipment required for the performance tests is listed in Table 1 3 Recommended Test Equipment Any equipment that satisfies the critical specifications g
16. cator goes out and all bus activity has ceased the system is calibrated 3 Connect the device under test between the Noise Source and the N8975A Option K40 RF INPUT Press CORRECTED NOISE FIGURE AND GAIN The 8970B will display the measurement frequency the gain and the noise figure of the amplifier at each selected frequency For the Noise Figure Measurement System specifications to be valid the measurement must use the same START FREQ STOP FREQ and STEP SIZE that was used for calibration None of the calibrated points can be skipped Also the measurement must be done in the same direction as the calibration for example from start frequency to stop frequency Figure 7 1 Test Setup for Calibration and Measurement with 8970B 71C ML OSCILLATOR Ld aiid sed 3 8971B C NOISE FIGURE TEST SET IF OUTPUT N8975A K40 RF INPUT O O RF OUTPUT O DOWN CONVERTER NOISE SOURCE DRIVE OUTPUT 346C K01 NOISE SOURCE CALIBRATIO 44 Chapter 7 Keysight N8975A Option K40 Blockdown Converter Operating and Service Manual Special Supplement 8 Service Replaceable Parts Section 8 01 Introduction This section contains information for ordering parts Table 8 1 lists all in reference designator order Section 8 02 Accessories Table 8 1 ITEM PART NUMBER QTY DESC
17. ce Manual contains information required to install operate test and service the Model N8975A Option K40 Block Down Converter Throughout this manual the Model N8975A Option K40 will also be referred to as the Down Converter The Down Converter Operating and Service Manual has eight sections consisting of Section 1 General Information Section 2 Installation Section 3 Operation Section 4 Performance Tests Section 5 Adjustments Section 6 Service Section 7 Operating the Down Converter with the 8970B 8971C NF System Section 8 Service Replaceable Parts Section 1 02 Specifications Instrument specifications for the Down Converter are listed in Table 1 1 These specifications are the performance standards against which the instrument may be tested Supplemental characteristics are listed in Table 1 2 Supplemental characteristics are not warranted specifications but are typical characteristics included as additional information for the user Table 1 1 Specifications Characteristics Performance Limits Conditions Input Frequency 26 5 40 GHz Output Frequency 18 4 5 GHz KEYSIGHT TECHNOLOGIES General Information Section 1 03 Safety Consideration Table 1 1 Specifications Characteristics Performance Limits Conditions LO Frequency 44 5 GHz 50 MHz Noise Figure 20 dB Maximum lt 15 dBm Typ Temperature Range Specification Range 15 to 35 C Operating Range
18. center for descriptions and part numbers of these cables O External Protective Earth Terminal While this is a Class product provided with a protective earthing conductor in a power cord an external protective earthing terminal has also been provided This terminal is for use where the earthing cannot be assured At least an 18AWG earthing conductor should be used in such an instance to ground the instrument to an assured earth terminal Figure 2 1 Power Cable and Mains Plug Part Numbers 220 240V 220 240V 100 120V 220 240V OPERATION 4 UPERATIUN OPERATION OPERATION PLUG SEV 1011 1959 24507 TYPE 12 PLUG NZSS 198 AS C112 PLUG NEMA 5 15P PLUG NEMA 6 15P CABLE 8120 2104 CABLE 8120 1369 CABLE 8120 1378 CABLE 8120 0698 220 240V 220 240V 7 220 240V OPERATION OPERATION OPERATION PLUG CEE7 VII PLUG DHCK 107 N PLUG BS 1363A CABLE 8120 1689 CABLE 8120 2956 CABLE 8120 1351 The number shown for the plug s the industry identifier for the plug only The number shown for the cable is a part number for a complete cable including the plug Section 2 06 Mating Connectors Mating connectors used with the Down Converter are 50 2 4mm APC male RF INPUT connector and a 50Q 3 5mm APC male RF OUTPUT connector located on the front panel Mating connectors used with the Down Converter should be of the same type and US MIL C 39012 compatible Chapter 2 15 Installation Section 2 07 Operating Environment section
19. eaned every 6 months Cleaning intervals are dependent upon where the Down Converter is used It should be cleaned more frequently if the environment used is a dusty or very humid area Section 6 12 Six Month Cleaning 36 Clean the cabinet of the instrument with a damp cloth only Careful cleaning of front panel connectors is essential to assure long reliable connector life to prevent accidental damage to connectors and to obtain maximum measurement accuracy and repeatability Dirt and stubborn contaminants should be removed with a cotton swab or lint free cleaning cloth moistened with a solvent Use the least amount of solvent possible and avoid wetting any plastic parts in the connectors with the solvent Use liquid solvents rather then spray If a spray must be used always spray the solvent onto a cloth or swab never directly into a connector Chapter 6 Service Section 6 13 Twelve Month Cleaning Very dirty connectors can be cleaned with 91 isopropyl alcohol Part Number 8500 0559 Do not use aromatic or chlorinated hydrocarbons esters trepans higher WARNING alcohol s keytones of ether alcohols such as benzene toluene turpentine dioxin gasoline cellosolve acetate or carbon tetrachloride Whichever solvent is used carefully avoid wetting the plastic support bead inside the connector and blow the connector dry immediately with a gently stream of compressed air Support beads are easily damaged by solven
20. ey Tab Press Sys Downconv softkey On Note LO Mode should be Fixed 5 Press key Mode Setup Note LO Frequency should be highlighted if not press Tab gt key until it is Enter using numeric keys 4 4 5 then softkey GHz Note IF Frequency is blank Sideband should be LSB LO Control should be Off If not use the Tab key to highlight the parameter to change and then press the appropriate softkey Press key Frequency Points then softkey Start Freq and enter 2 6 5 GHz then softkey Stop Freq and enter 4 0 GHz 8 Press softkey More 1 of 2 then softkey Points and enter 2 8 Enter 9 Press System then softkey Alignment then softkey Alignmnt Mode to Chapter 3 Point Alignment should be ON 23 24 Operation Section 3 11 Sales and Service Offices 10 Press key Averaging Band width then softkey Averages and enter 3 2 Enter Press softkey Averaging to On 11 Press Calibrate twice and wait for calibration to complete Measurement Procedure After calibration disconnect the noise source from the RF INPUT of the K40 Down Converter Connect the noise source output to the input of the device under test DUT and the output of the DUT to the K40 Down Converter RF INPUT Press Restart and wait for the measurement sweep to complete Record the results For the Noise Figure Measurement System specifications to be valid the measurement must use the s
21. full serial number 17 Installation Section 2 11 Packaging Chapter 2 Keysight N8975A Option K40 Blockdown Converter Operating and Service Manual Special Supplement 3 Operation Section 3 01 Introduction This section provides complete operating information for the Down Converter Included in this section are descriptions of the front and rear panel connectors and indicators maintenance and operating instructions When using the Down Converter with a N8975A Noise Figure Analyzer refer to the N8975A Operating and Service Manual for additional operating information When using the Down Converter with the 8970B 8971C noise figure system a 20 dB attenuator connected to the output of the Down Converter is required so that the nominal gain of the Down Converter plus attenuator is approximately O dB Section 3 02 Panel Features The front and rear panel features are shown in Figure 3 1 Any explanation of all connectors and indicators is given in Section 3 03 Front Panel Features and Section 3 04 Rear Panel Features Section 3 03 Front Panel Features a RF Input J1 A 2 4mm female connector provides the input to the Down Converter The maximum input to avoid damage when used with an N8975A Noise Figure Meter is 10 dBm The impedance is 50Q Generally the noise source is attached to this connector for calibration and the device under test is attached to this connector for noise figure measurement b RF Output J2
22. g air and or a soft bristle brush clean all other accessible areas of the instrument starting from the top including the A1 A2 and A3 assemblies 5 Replace the instrument covers Section 6 14 Overall Troubleshooting The Overall Troubleshooting section consists of Principles of Operation and Troubleshooting information for the Down Converter Chapter 6 37 Service Section 6 15 Principles of Operation Section 6 15 Principles of Operation Input frequencies from 26 5 to 40 GHz are coupled into the A2 Down Converter by coax to waveguide transition A2FL1 prevents frequencies above and below the 26 5 GHz to 40 GHz band from entering the mixer A2U1 Frequencies above 40 GHz in the image band 49 62 5 GHz could mix with the 44 5 GHz LO and cause spurious outputs Frequencies from 26 5 to 40 GHz will mix with this LO and create an Intermediate Frequency of 18 to 4 5 GHz which is amplified by A2ZAR1 and routed to the RF OUTPUT Further IF filtering is performed with the input YIG filter in the N8975A Note that the N8975A Option K40 uses a LO below the incoming RF so that increasing RF frequency results in increasing IF frequencies e g 26 5 GHz input corresponds to 18 GHz output Section 6 16 Troubleshooting This information is in the form of suggestions to allow the technician troubleshooting the Down Converter to isolate the problem area as rapidly as possible The information contained in the Block and Schematic Diagrams sh
23. hesizer 26 5 40 GHz 0 dBm 83640A Noise Source ENR gt 9dB 10 MHz 40 GHz 346C K01 Spectrum Analyzer Signal Analysis 2 18 GHz E4407B 8566A B Coaxial Adapter APC 2 4mm female to 1250 2277 3 5mm female 10 Chapter 1 General Information Section 1 11 Symbols and Labels section 1 11 Symbols and Labels The Caution risk of danger symbol The product is marked with this symbol when it is necessary for the user to refer to the instructions in the supplied documentation The out position of a bistable push control switch The in position of a bistable push control switch The ON OFF symbol The ON symbol Indicates a Protective Conductor Terminal that must be connected to earth ground before operating the equipment protects against electrical shock in case of a fault Warning denotes a hazard It calls attention to a procedure which if not correctly performed or adhered to could result in injury or loss of life Do not proceed beyond a warning note until indicated conditions are fully understood and met CAUTION ji orpP Caution denotes a hazard It calls attention to a procedure which if not correctly performed or adhered to could result in damage to or destruction of the instrument Do not proceed beyond a caution note until the indicated conditions are fully understood and met ICES NMB 001 ISM GRP 1 CLASS A This ISM device complies with Canadian ICES 001 Cet appareil ISM est co
24. ified national inch and metric screws The metric screws are defined in Industrial Fasteners Publication IFI 500 and are identified in the list as metric The unified national screws are identified in the list as non metric To prevent thread damage ensure that the same type of screw and nut is used in each application Section 6 07 Assembly Locations Assemblies in the Down Converter are numbered in groups both by function and by location Refer to the service sheets for identification of assemblies Section 6 08 Parts and Cable Locations The location of individual components mounted on the assemblies are shown near the schematic diagram The part reference designator is the assembly designator plus the parts designator For example A2R9 is R9 on the A2 assembly For specific component descriptions and ordering information refer to Table 8 1 on page 45 in Section 8 2 Section 6 09 Test Point Locations There are no test point locations identified Chapter 6 35 Service Section 6 10 Cover Removal Section 6 10 Cover Removal Cover Removal To remove the cover remove the two screws that hold the rear bezel as shown in the above picture When replacing the cover re tighten the captive screws in the rear bezel using a 9 in lbs T15 screwdriver section 6 11 Cleaning Intervals Keysight Technologies recommends a 12 month interval between cleaning for some parts of the Down Converter Front panel connectors should be cl
25. iven in the table may be substituted for the recommended models Section 4 03 Performance Test Record Results of performance tests may be recorded in Table 4 1 Performance Test Record This lists all test specifications and the acceptable limits for each specification Results recorded at incoming inspection can be used for comparison in periodic maintenance and troubleshooting and after repairs Section 4 04 Calibration Cycle This instrument requires periodic verification of performance Depending of the use and environmental conditions the instrument should be checked using the performance tests at least once a year KEYSIGHT TECHNOLOGIES 25 Performance Tests Section 4 05 Performance Test Procedures Section 4 05 Performance Test Procedures It is assumed that the person performing the following test understands how to operate the test equipment Equipment settings are stated in general terms It is also assumed that the technician will select the cables and adapters required to complete the test set ups illustrated in this section To consider the performance test valid the following conditions must be met 1 The Down Converter and all test equipment must have a minimum of 30 minutes warm up time 2 The line voltage must be 100 to 240 VAC 3 The Ambient temperature must be 15 C to 35 C from start of the warm up period to the completion of all tests Section 4 06 Frequency Range and Noise Figure a S
26. lt in personal injury or death Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met Where to Find the Latest Information Documentation is updated periodically For the latest information about these products including instrument software upgrades application information and product information browse to one of the following URLs according to the name of your product http www keysight com find n8975a To receive the latest updates by email subscribe to Keysight Email Updates at the following URL http www keysight com find MyKeysight Information on preventing instrument damage can be found at www keysight com find PreventingInstrumentRepair Is your product software up to date Periodically Keysight releases software updates to fix known defects and incorporate product enhancements To search for software updates for your product go to the Keysight Technical Support website at http www keysight com find techsupport Table of Contents 1 General Information Section Section Section Section Section Section Section Section Section Section Section 2 Installation Section Section Section Section Section Section Section Section Section Section Section 3 Operation Section Section Section Section Section Section Section Section Section Section Section Contents IHONLIAEOGUETON siriani haved Ea dene as R
27. nect the N8975A option K40 as shown in Figure 7 1 Load the ENR data to cover the frequency range to be measured i Calibration and Measurement Procedure As an example the following procedure would be used to calibrate and measure the noise figure and gain of a amplifier from 26 5 to 40 GHz every 500 MHz 1 Set up the measurement parameters with the following key strokes a Press 0 9 SPECIAL FUNCTION Press 0 9 SPECIAL FUNCTION This initializes the special functions Press 1 7 SPECIAL FUNCTION Sets up fixed LO variable IF operation Press 4 1 n SPECIAL FUNCTION Where n selects the correct system local oscillator program If a 8673x Synthesizer is used Press 4 1 3 SPECIAL FUNCTION Press 2 1 SPECIAL FUNCTION Sets up lower sideband operation Press START FREQ 2 6 5 0 0 ENTER Start frequency 26 5 GHz Ignore error E28 since the system is not yet calibrated Press STOP FREQ 4 0 0 0 0 ENTER Stop frequency 40 GHz g Press STEP SIZE 5 0 0 ENTER Frequency step 500 MHz h Press 3 1 SPECIAL FUNCTION 4 4 5 0 0 ENTER KEYSIGHT TECHNOLOGIES N8975A option K40 internal LO is 44 5 GHz 43 Operating the Down Converter with the 8970B 8971C NF System 2 Calibrate the system by attaching the Noise Source to the N8975A option K40 RF INPUT When the Calibrate indi
28. nforme la norme NMB 001 du Canada The Caution risk of danger symbol The product is marked with this symbol when it is necessary for the user to refer to the instructions in the supplied documentation a gt Chapter 1 The CE mark shows that the product complies with all applicable European Directives 11 General Information Section 1 11 Symbols and Labels The CSA mark is a registered trademark of the Canadian Standards Association The C Tick mark is a registered trademark of the Australian Communicat ions Act of 1992 Communications Authority This signifies compliance with the Australian EMC Framework Regulations under the terms of the Radio product or disposal This is the symbol for an Industrial Scientific and Medical Group 1 Class This symbol indicates separate collection for electrical and electronic equipment mandated under EU law as of August 13 2005 All electric and electronic equipment are required to be separated from normal waste Reference WEEE Directive 2002 96 EC n This symbol n of the environmental protection use period Protection Use Period is stated in the num date of manu acture located in the center ot only indicates the presenc ubstances above the MCV but also specifi recyclable and should not be thrown away e of hazardous or toxic ies that the material product is casually as well as the length EPUP
29. ng material is damaged it should be kept until the contents of the shipment have been checked for completeness and the instrument has been checked mechanically and electrically The contents of the shipment should include the accessories specified in Section 1 06 Accessories Supplied on page 9 Procedures for checking electrical performance are given in Chapter 4 Performance Tests on page 25 If the contents are incomplete or if there is mechanical damage or defect notify the nearest Keysight Technologies office If the shipping container is damaged or the cushioning material shows signs of stress notify the carrier as well as the Keysight Technologies office Keep the shipping material for carrier s inspection KEYSIGHT TECHNOLOGIES Installation Section 2 03 Power Requirements section 2 03 Power Requirements The N8975A Option K40 Down Converter requires a power source of between 100V AC to 240 V AC single phase Line frequency is 50 60Hz The rated power consumption is 100V AC 45VA and 240V AC 70VA maximum This is a safety class 1 product that is provided with a protective earth WARNING terminal An un interruptable 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 that the protection has been impaired the product must be made inoperative and be secured against any unintended operation Sec
30. nt Panel Features 25222245 ao fiala ese RIA EIA Redi 19 3 04 Rear Panel Features cirie i oe boa eee GE eae EOE REE EES Gee bY eds 20 3 05 OperatingiGharaGteristGSis u gici canddandenteGlageddneevnetddaewesd ph Era Ena EEES 20 SUG Operators Maltenalnce sie Oo damage abla ede oa dee Eesha e Eee eee 20 3 07 General Operating INStPUCHIONS 2 vo ee coon es eee ep 22 3 08 Turm O PIOGEAUFEe aad ieee 5 bh 2 cadd aa acted REA PETERS dbase ee cia acia 22 3 09 Down Converter Operation 4 pe e hile pee eddie dae ata ee teeta Gee 22 3 10 Setup and Calibration Procedure LL 23 3 11 Salesand Service D TICES svacaxi ited denotes eb bas Lae rt Oh baer aes 24 4 Performance Tests Contents Section 4 0 IMMOGUCHOM eta daa id eee ea ra aironi 25 Section 4 02 EquIOMEeNtREGUIFEM 4 30424 24364644 bidebehewss dale le ia Pipe 25 Section 4 03 Performance Test RECO e srate rari perda bac de fe Tema 25 Section 4 04 Calibration Cycle A a e 25 Section 4 05 Performance Test Proc dures 2 0 2 c ccc cece ete tt E Eae eee 26 Section 4 06 Frequency Range and Noise Figure sesa cienias sasien oiei tie aa sepiii ie sa a BEEE a i 26 Section 4 07 LO Frequency ACCUTACY i ccscs44 eta rr pai ata E o 29 5 Adjustments 6 Service Section 6 01 INETOALUGHON 3 spillato baa paa oleosa helena 33 Section 6 02 Service SHEETS naaa ee ds perrita orita a es tt 33 Section 6 03 Safety COnsiderations i e pea dS 33 Section 6 04 Servicing the
31. ock do not perform any servicing unless qualified to do so Adjustments described in the manual are performed with power supplied to the instrument while protective covers are removed Energy available at many points may if contacted result in personal injury Capacitors inside the instrument may still be charged even if the instrument has been disconnected from its source of supply For continued protection against fire hazard replace the line fuse s only with 250V fuse s of the same current rating and type F3 15AH 250V Do not use repaired fuses or short circuited fuse holders Do not disconnect or remove any carriers or boards in the instrument unless the instrument is unplugged Some boards contain devices that can be damaged if the board is removed when the power is on Section 6 04 Servicing the Instrument 34 Once an error has been detected and the fault is known to be within the instrument it is necessary to place the instrument in a serviceable position refer to Top and Bottom Covers removal procedure near the end of this section Chapter 6 Service Section 6 05 Pozidrive Screwdrivers Section 6 05 Pozidrive Screwdrivers Many screws in the Down Converter appear to be Phillips type but are not To avoid damage to the screw headshots Pozidrive screwdrivers should be used 8710 0899 is the number 1 Pozidrive 8710 0900 is number 2 Pozidrive Section 6 06 Hardware The Down Converter has a mixture of un
32. on K40 Block Down Converter is designed to be used with the N8975A Noise Figure Analyzer The option K40 extends the frequency range of the N8975A by down converting the 26 5 GHz to 40 GHz frequency band In addition to the N8975A a Noise Source 346C K01 recommended is required for a complete Noise Figure measurement system The Down Converter uses an internal 44 5 GHz LO for down conversion of the 26 5 GHz to 40 GHz input The resulting 18 GHz to 4 5 GHz signal is processed by the N8975A Noise Figure Analyzer to give information about the noise figure and gain of a Device Under Test DUT section 1 05 Options There are no electrical or mechanical options to the N8975A option K40 Down Converter Section 1 06 Accessories Supplied Chapter 1 The N8975A option K40 Down Converter is supplied with a three wire power cable Different cables are available for different power mains configurations Check with you local Keysight Technologies office for descriptions and part numbers for these cables A rack mount kit is supplied for mounting the N8975A option K40 in a standard 19 inch EIA rack The part number for the rack mount kit is 5063 9240 An RF cable part number 08971 60127 is supplied This cable is used to connect the Down Converter RF OUTPUT to the N8975A INPUT An APC 2 4 mm female to female coax adapter is supplied part number 1250 2188 This is supplied to connect the 346C K01 to the Down Converter RF Input for calibration
33. onverter Operation The Down Converter require to be operated with a N8975A Noise Figure Analyzer for a complete 26 5 GHz to 40 GHz noise figure measurement system As an example the following procedure would be used to calibrate and measure the noise figure and gain of an amplifier from 26 5 GHz to 40 GHz every 500 MHZ Chapter 3 Operation Section 3 10 Setup and Calibration Procedure ENR Data Before noise figure and gain measurements can be made the ENR of the Noise Source must be entered into the N8975A Information on how to enter the data is found in the ENR Table Entry procedure in Chapter 2 in the section on Entering Excess Noise Ratio Data of the N8975A Users Guide N8972 90080 It is not necessary to input all ENR data points but the data must cover the measurement frequency Connections Calibration To calibrate the N8975A and the K40 Down Converter as a system make the following connections as shown in Figure 3 2 Connect 346C K01 Noise Source to the K40 RF INPUT using adapter 1250 2188 Connect the K40 RF OUTPUT to the N8975A INPUT using cable 08971 60127 Connect the N8975A Noise Source Drive Output to the 346C K01 INPUT section 3 10 Setup and Calibration Procedure 1 Switch on the N8975A and the K40 Down Converter allow half an hour to warm up Press System then softkey External LO then Max Freq and enter 5 0 GHz 3 Press key Meas Mode then softkey Amplifier then k
34. ould be used to isolate a malfunction Failures generally fall into two categories catastrophic failures or performance degradation In both cases it is important to first verify that the failure is in the Down Converter and not the test equipment Section 6 17 Check List 38 Make a visual inspection of the Down Converter and the connectors of any test instruments Look for damage to the coax connectors and check that the internal fan is operating f the failure is catastrophic check the 15 volt power supply f the LO frequency is incorrect A2A1 is faulty replace A2 assembly f the problem is high noise figure or low conversion gain but the LO frequency is correct the problem is most likely a failed A2AR1 IF amplifier or A2U1 mixer or the input isolator replace A2 assembly The IF amp has a gain of about 25 dB and a noise figure of about 6 dB The mixer has a conversion loss and noise figure of about 7 dB If these components are OK check that the LO is driving the L port of the mixer with about 12 dBm Chapter 6 Service Section 6 17 Check List After completing any repairs to the Up Down Converter the tests in Chapter 4 Performance Tests on page 25 should be performed to ensure that the instrument is operating within the specified limits The complete A2 assembly should be returned to Keysight Technologies if faulty NOTE It will be repaired and re aligned before returning to the customer
35. pecification Frequency Range 26 5 GHz to 40 GHz Noise Figure 20 dB Maximum Description The Noise Figure Analyzer uses Measurement Mode DUT is Down Converter in fixed LO mode to measure the noise figure of the N8975Aoption K40 b Equipment Noise Figure Analyzer N8975A Noise Source 346C Option K01 Adapter APC 2 4mm female to APC 3 5mm 1250 2277 female i Performance Calibration and Measurement Procedure 1 Connect the test equipment as shown in Figure 4 1 a for calibration 2 Switch on the N8975A and the N8975A K40 Down Converter allow half an hour to warm up 26 Chapter 4 Performance Tests Section 4 06 Frequency Range and Noise Figure 3 Preset all instruments then enter the ENR data for the 346C option KO1 into the N8975A See chapter 3 ENR Data for details Only data from 4 to 18 GHz and 26 5 to 40 GHz is needed for the performance test 4 From N8975A press System then softkey External LO then Max Freq and enter 5 0 GHz 5 Press key Meas Mode then softkey Downconv Note LO Mode should be Fixed 6 Press key Mode Setup Note LO Frequency should be highlighted if not press Tab key until it is 7 Enter using numeric keys 4 4 5 then softkey GHz Note IF Frequency is blank Sideband should be LSB LO Control should be Off If not use the Tab key to highlight the parameter to change and then press the appropriate softkey 8 Press key Frequency Points then softkey S
36. r cable set i Warnings and Cautions KEYSIGHT TECHNOLOGIES 33 Service Section 6 04 Servicing the Instrument Pay attention to WARNINGS and CAUTIONS They must be followed for your protection and to avoid damage to the equipment Maintenance described herein is performed with power supplied to the instrument and with protective covers removed Such maintenance should be performed only by service trained personnel who are aware of the hazards involved for example fire and electrical shock Where maintenance can be performed without power supplied the power should be removed Any interruption of the protective grounding conductor inside of outside the instrument or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury Grounding one conductor of a two conductor outlet is not sufficient protection In addition verify that acommon ground exists between the unit under test and this instrument prior to energizing either unit Whenever it is likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation If this instrument is to be powered via an auto transformer for voltage reduction make sure that the common terminal is connected to neutral that is the grounded side of the mains supply Servicing instructions are for use by service trained personnel only To avoid dangerous electric sh
37. rwise provide the government rights in excess of these rights customarily provided to the public to use modify reproduce release perform display or disclose commercial computer software or commercial computer software documentation No additional government requirements beyond those set forth in the EULA shall apply except to the extent that those terms rights or licenses are explicitly required from all providers of commercial computer software pursuant to the FAR and the DFARS and are set forth specifically in writing elsewhere in the EULA Keysight shall be under no obligation to update revise or otherwise modify the Software With respect to any technical data as defined by FAR 2 101 pursuant to FAR 12 211 and 27 404 2 and DFARS 227 7102 the U S government acquires no greater than Limited Rights as defined in FAR 27 401 or DFAR 227 7103 5 c as applicable in any technical data Safety Notices CAUTION A CAUTION notice denotes a hazard It calls attention to an operating procedure practice or the like that 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 A WARNING notice denotes a hazard It calls attention to an operating procedure practice or the like that if not correctly performed or adhered to could resu
38. s apply to both storage and shipment limitations Tagging for Service If the instrument is being returned to Keysight Technologies for service please complete one of the blue repair tags located at the end of any Service manual and attach to the instrument Original Packaging Containers and materials identical to those used in factory packaging are available through Keysight Technologies offices Mark the container FRAGILE to assure careful handling In any correspondence refer to the instrument by model number and full serial number Other Packing The following general instructions should be used for re packaging with commercially available materials Chapter 2 Wrap the instrument in heavy paper or plastic If shipping to a Keysight Technologies office or service center attach a tag indicating the type of service required return address model number and full serial number use blue repair tag Use a strong shipping container A double wall carton made of 2 4 MPa 350 psi test material is adequate Use enough shock absorbing material 75 to 100mm 3 to 4 inches thick around all sides of the instrument to provide a firm cushion and prevent movement in the container Protect the front panel with an appropriate type of cushioning material to prevent damage during shipment Seal the container Mark the container FRAGILE to assure careful handling In any correspondence refer to the instrument by model number and
39. tart Freq and enter 4 5 GHz then softkey Stop Freq and enter 1 8 GHz 9 Press softkey More 1 of 2 then softkey Points and enter 2 8 Enter 10 Press System then softkey Alignment then softkey Alignmnt Mode to Point Alignment should be ON 11 Press key Averaging Band wid th then softkey Averages and enter 3 2 Enter Press softkey Averaging to On 12 Press Calibrate twice and wait for calibration to complete Connect the Down Converter as shown in Figure 4 1 b for measurement then press Restart and wait for the sweep to complete before reading off the results Use the table format for the results and single sweep so the results can be easily read For table format press Format then softkey Format then softkey Table Chapter 4 27 Performance Tests Section 4 06 Frequency Range and Noise Figure Figure 4 1 Test Set up for Calibration and Measurement NFA N8975A DOWN CONVERTER N8975A K40 Noise Source peo Drive Output Measure Adapter 1250 2188 Noise Source 346C Option KO1 Calibrate Adapter 1250 2277 Figure 4 2 Test Set up for LO Accuracy and Troubleshooting 8566A B SPECTRUM ANALYZER N8975A K40 DOWN CONVERTER RF RF RF cat INPUT OUTPUT 83640A SYNTHESIZED RF GENERATOR 28 Chapter 4 Performance Tests Section 4 07 LO Frequency Accuracy section 4 07 LO Frequency Accuracy Specification 44 5 GHz 50 MHz i Descrip
40. tion This test measures the Local Oscillator frequency by observing the output frequency at the RF OUTPUT when a highly stable and accurate 26500 MHz is input ii Equipment Frequency Synthesizer 83640A Spectrum Analyzer E4407B iii LO Frequency Measurement Procedure 1 Set the 83640A combination for a CW signal of 26500 MHz at 30dBm 2 Connect the equipment as shown in Figure 4 1 Connect the RF output of the 83640A to the N8975A option K40 RF INPUT and connect the E4407B input to the N8975A option K40 RF OUTPUT 3 From E4407B press PRESET on the Spectrum Analyzer then press CENTER FREQ 1 8 GHz FREQ SPAN 1 0 0 MHz An 18 GHz signal at about 30 dBm should be observed near the center of the display 4 Press Spectrum Analyzer Marker NORMAL and PEAK SEARCH Read the frequency in the upper right hand corner of the display The indicated frequency should be 18000 MHz 50 Record the frequency to the Test Record Card Chapter 4 29 Performance Tests Section 4 07 LO Frequency Accuracy Table 4 1 Performance Test Record 4 4 Noise Figure Vs Frequency Gain Actual NF Max NF Frequency GHz dB dB dB IF RF 18 00 26 50 20 00 17 50 27 00 20 00 16 50 28 00 20 00 15 50 29 00 20 00 14 50 30 00 20 00 13 50 31 00 20 00 12 50 32 00 20 00 11 50 33 00 20 00 10 50 34 00 20 00 9 50 35 00 20 00 8 50 36 00 20 00 7 50 3
41. tion 2 04 Line Voltage and Fuse Selection This instrument has an autoranging line voltage input be sure the supply voltage CAUTION is within the specified range The mains supply voltage fluctuations are not to exceed 10 of the nominal supply voltage The Down Converter will operate with voltages between 100V AC and 240V AC and so requires no switching or change of fuse Section 2 05 Power Cables Before connecting this instrument the protective earth terminals of this WARNING instrument must be connected to the protective conductor of the line Mains power cable The line plug shall only be inserted in a socket outlet provided with a protective earth contact The protective action must not be negated by the use of an extension cord power cable without a protective conductor grounding Grounding one conductor of a two conductor outlet is not sufficient protection This instrument is equipped with a three wire power cable When connected to an appropriate AC power receptacle this cable grounds the instrument cabinet The type of power cable plug shipped with each instrument depends on the country of destination See Figure 2 1 Power Cable and Line Mains Plug part numbers for the part numbers of available power cables Cables are 14 Chapter 2 Installation Section 2 06 Mating Connectors available in different lengths or with right angle plugs to the instrument Check with your nearest Keysight Technologies service
42. ts Interior surfaces especially on precision 3 5 mm connectors are very difficult to reach and it is easy to damage connectors in trying to clean them One suitable method is to cut off the sharp tip of a round wooden toothpick and then to wrap it with a single layer of lint free cleaning cloth A round wooden toothpick or a very small diameter wooden rod is required metal must never be used because it will scratch the plated surface diameter must not exceed 0 070 in or 1 7mm Moisten the cloth with a small amount of cleaning solvent and carefully insert it into the connector to clean the interior surfaces Use an illuminated magnifying glass or microscope to see clearly the areas you wish to clean When you have cleaned a connector always be sure that it is completely dry before using it Blow the connector dry with a gently stream of clean compressed air and inspect it again under a magnifying glass to be sure that no particles or solvent residues remain Section 6 13 Twelve Month Cleaning Before cleaning make sure the Down Converter is dis connected from the power WARNING source This is to eliminate the possibility of electrical shock 1 Remove the top and bottom covers to gain access to the interior of the instrument 2 Using a brush remove dirt from the fan guard and fan blades 3 Using compressed air remove dust and dirt from the area behind the fan Blow air out through the fan and remove loose dirt 4 Usin
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