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85325A R/Q/U/V/W Millimeter Subsystem and 85326A Millimeter

1. 11970 MIXER TEST ANTENNA D 26 n E so heer LE PEA m l REFERENCE ISOLATOR fe oh ERR ANTENNA JH 00 000000100100 TEST E ius OPTIONAL REFERENCE ANTENNA CONNECTION MODULE pes 365A DIPLEXER ISOLATOR RF 11970 REFERENCE EHE MIXER 8349B REFERENCE MODULE n i E IFN IF OUT nt DET OUT LO OUT REF IF IN 4 85309A RF SOURCE LO IF UNIT SLOPED OUT INTERFACE SLOPE 7 LO POWER PAD DIPLEXER 10 MHz REF ar NB ane RF SOURCE INPUT LO SOURCE POWER TEST Lo SPLITTER AMP Lg sess es s or e eee SLOPED 10 MHz REF 10 MHz REF Fw A BLANK CoN PAD OUTPUT OUTPUT INPUT bos XL SED EGR EVE AUTOMATIC LEVELING CONTROL LO SOURCE DETECTOR LO LOOUT ViSRLAY ADJUST OF RANGE REF IF TEST IF OUT OUT al bl t2 or a2 TEST SET RECEIVER interconnect FOR 8350 LO ONLY LO PHASELOCK OUT Bo i NOT USED FOR 8350 LO SOURCE 10 MHz REF INPUT theory1 Figure 5 1 System Diagram 5 2 Agilent Technologies 85325A Operating and Service Manual Transmitter Section Source and Amplifier MM Source Module MM Head System Bus Cable Lengths Servi
2. Length of LO Cable from Reference Module Test Module Attenuation HP Agilent 85309A to Reference Attenuation Required Required Module Ly Cable 9 meters 0 dB 0 dB 8 meters 1dB 0 dB 7 meters 1dB 1dB 6 meters 2 dB 1dB 5 meters 2 dB 2 dB 4 meters 3 dB 2 dB 1 5 to 3 meters 3 dB 3 dB 1 Assumes use of HP Agilent 85381A cable type 2 A standard Agilent 85325A system uses 8 6 or 4 meter cables How to Use the Chart Determine the length of the LO cable that goes from the HP Agilent 85309A REF LO OUT connector to the reference module s LO IN connector Look the length up in Table 1 4 to find the appropriate amount of attenuation for the test and reference modules HP Agilent cables have label sleeves marked C04 C06 or C08 The number represents the length of the cable in meters Standard systems use LO cables that are 4 6 or 8 meters in length Other lengths are not standard but might apply to special systems Changing Attenuation Procedure 1 Use the supplied 10 TORX driver to remove the screws securing the module covers 2 Observe the attenuator that is connected to the reformable cable Hold the body of this attenuator in place with one of the supplied 5 16 inch wrenches 3 Use the other 5 16 inch wrench to disconnect the reformable cable 4 Remove other attenuators as required using this method 5 Place unused attenuators in the holders see Figure 1 2 and Figure 1 3 on page 1 10
3. 6 Replace the reformable cable Agilent Technologies 85325A Operating and Service Manual 1 9 Installation Mixer LO Power Level Adjustment 7 Make sure the connections inside the module are secure before replacing the module covers 8 to 10 in Ibs of torque is recommended 8 Replace the module covers and screws Tighten the screws until they are snug Do not over tighten HOLDERS FOH UNUSED ATTENUATORS 0 dB CONFIGURATION WOO REFORMABLE eee RIGID CABLE ATI AT2 W3 85326 60002 testattn 3dB configuration Figure 1 2 Reference Attenuator Installation HOLDERS FOR UNUSED ATTENUATORS 7dB configuration REFORMABLE RIGID CABLE 85326 60001 0 dB CONFIGURATION refattn Figure 1 3 Test Attenuator Installation 1 10 Agilent Technologies 85325A Operating and Service Manual NOTE Procedure 1 Initial Setup 848 Installation Adjustment Procedures Adjustment Procedures Brackets indicate a front panel key on a computer keyboard Braces indicate a display softkey selection LO power must be adjusted before connecting the Agilent 85325A mixers to avoid damaging them Use Procedure 1 or 2 as appropriate Procedure 1 Use this procedure if you are only
4. 06 cs0 00 05450 e400 n en 4 2 Table 4 1 Recommended Test Equipment non banded 4 2 Band Dependent Equipment 22 cc Rr saw ss 4 3 Table 4 2 Recommended Test Equipment banded 4 3 Receiver Performance Verification i520 suas hh ah rh 4 4 CUE coke DRE 4 4 System CONSIGN ck con PR ee OE ee Red 4 4 Measurement Parameters Section 00 ce eee eee eee 4 4 Calculation Parameters Section 0 524584 ee 0d seater e kes 4 5 admo Up The Equipment iupssuesosbedc ee eRsd E qu du id eee datas S 4 6 luco T 4 6 Table 4 3 Proper Connector Torque lees 4 6 Figure 4 1 Initial Equipment Configuration ll lesu 4 7 Table 4 4 Switch Positions for Analyzer Mode 4 8 RE to IF Conversion aescreceps x REUS RYE d EEG eee ATa RR RES 4 8 IF Noise Measte moll cuisse adeue bean ee wer ORE Sees Ada 4 8 Channel Ost ou 24 dms vaa dh bee ceed eR Edo eases eens 4 8 Contents 2 Agilent Technoligies 85325A Operating and Service Manual rnc o Re Pcr 4 9 5 Service InlrGduGtlonm iiu rt pRRERRCERERRERIXEG E E Rp 5 1 EROGO OE Operan Li cee ER ERE ain d ees 5 2 Figure 3 1 System D asrQNe 2 2 24 lads da 9 ERR Gd s 5 2 Tangut SOCIO sd care wae RE ASH P CORE AE ba der bank 5 3 Receiver SECON Liaacnexc bbbc era eridde bewaqdiPPqeadddd 5 4 Recommended Test Equipment 15 22 coe ore Rh xen 5 7 Non Banded Equipment sc 222432244 mace RE direst Rei 5 8 Table 5 1 Recommended Test Equipmen
5. The following tables list major instruments required for supporting the mm wave measurement system To determine recommended test equipment for each of the mm wave system instruments refer to the manual for that instrument Substitute test instruments can be used if they meet or exceed the Critical Specification shown in Table 5 1 on page 8 and Table 5 2 on page 9 No substitute means you must use the listed device Miscellaneous adapters and cables are also required and may not be listed in the tables Agilent Technologies 85325A Operating and Service Manual 5 7 Service Recommended Test Equipment Non Banded Table 5 1 shows equipment that is not mm wave band dependent The quip p Equipment equipment can be used with any mm system Table 5 1 Recommended Test Equipment Non Banded Item Critical Specification iet beau MORSU or paN Use Receiver o substitute See Compatible Instruments 0 P T LO Source 0 substitute See Compatible Instruments 0 P T LO IF Source 0 substitute HP Agilent 85309A 0 P T RF Source 0 substitute See Compatible Instrument 0 P RF Source 1 to 26 5 GHz HP Agilent 83640B T Amplifier o substitute HP Agilent 8349B 0 Power Meter 0 substitute HP Agilent 436A 437B forR Q or IP T W bands Power Sensor 0 substitute HP Agilent 8485A 8481A or 8487A PT Connector Adapters type N and 3 5 mm Various P T mmW Network Analyzer System mm wave band must match y
6. diplexer replacing 5 12 E electrostatic discharge 2 1 equipment 1 1 band dependent 4 3 initial onfiguration 4 7 non banded 4 2 proper connector torque 4 6 recommended test 4 1 required 1 2 setup 1 1 4 6 supplied 3 5 test 5 7 G general information 3 1 H HP 11970 mixers power requirement 2 2 HP 8510B power leveling settings for 1 6 HP 8510C power level settings for 1 6 HP 85309A LO IF unit 5 5 HP 8530A power level settings for 1 6 HP IB address of LO source 1 5 I initial setup 1 3 installation 1 1 block diagram 1 21 1 23 final 1 20 perform final 1 1 reference attenuator 1 10 test attenuator 1 10 L leveling control cables 1 20 leveling feedback loop 2 1 LO input power maximum 2 2 Agilent Technoligies 85325A Operating and Service Manual Index 1 LO leveling feedback 2 1 LO power 1 1 adjusting for HP 85325A in conjunction with other mixers 1 14 LO power level adjust 1 1 LO power level adjustment for mixers 1 8 1 11 LO power required 2 2 LO source 5 5 receiver 5 5 LO source HP IB address 1 5 M mixer information mm wave 3 4 mixer LO power level adjustment 1 8 mixer modules 5 4 mixer operating parameters 2 2 mixer operation 1 1 mixer operation check 1 16 MM source module 5 3 MM wave mixer characteristics 3 4 source characteristics 3 4 MM wave mixer information 3 4 multiple source mode settings 1 6 multiplier denominator table of v
7. Harmonic Number RF Input Level HP Agilent 83554A 26 5 40 GHz 7 dBm 2 17 dBm HP Agilent 83555A 33 50 GHz 3 dBm 3 17 dBm HP Agilent 83556A 40 60 GHz 3 dBm 3 17 dBm HP Agilent 83557A 50 75 GHz 3 dBm 4 17 dBm HP Agilent 83558A 75 110 GHz 0 dBm 6 17 dBm 1 At25 C 5 C MM Wave Mixer Information Mixer Model RF Frequency Harmonic Number LO Power Level Range HP Agilent 11970A 26 5 40 GHz 8 16 2 dBm HP Agilent 11970Q 33 50 GHz 10 16 2 dBm HP Agilent 11970U 40 60 GHz 10 16 t 2 dBm HP Agilent 11970V 50 75 GHz 14 16 2 dBm HP Agilent 11970W 75 110 GHz 18 16 2 dBm 3 4 Agilent Technologies 85325A Operating and Service Manual Table 3 5 General Information Supplied Equipment Supplied Equipment The following items are supplied with the Agilent 85325A and the Agilent 85326A Supplied Parts Description Standard Option 001 Option 002 Model or Part Quantity Quantity Quantity Number With the Agilent 85325A MM Wave Source 1 1 1 HP Agilent Module 8355xA Directional Coupler 1 1 1 HP Agilent 752D Mixers 2 3 4 HP Agilent 11970 C01 Isolators 2 3 4 HP Agilent365A 1 4 inch Wrench 1 1 1 8710 0510 3 16 inch Wrench 1 1 1 8710 0013 3 32 Hex Ball Drive 1 1 1 8710 1539 4 40 0 4 inch Screws 50 50 50 3030 0221 4 40 0 5 inch Screws 50 50 50 3030 0209 4 40 Hex Nuts 50 50 50 2260 0002 4 40 Captive Screws 50 50 50
8. 0 to 40 dB attenuation HP Agilent x382A P V band Millitech DRA 15 W band Millitech DRA 10 Directional Coupler Coupling factor 10 dB HP Agilent x752C PT 1 I installation O operation P performance verification T 2 You must have one of these devices for each mm wave band 3 Where x stands for the band R Q U V or W troubleshooting and repair Agilent Technologies 85325A Operating and Service Manual 5 9 Special 5 16 Inch Wrench Service Troubleshooting Troubleshooting To troubleshoot the millimeter wave system refer to the Service chapter of the HP Agilent 85310A Distributed Frequency Converter Operating and Service Manual A specially modified 5 16 wrench is supplied with this product The closed end has been machined to be smaller and has been slotted so it will fit over a cable 5 10 Agilent Technologies 85325A Operating and Service Manual Service Replaceable Parts Replaceable Parts Ordering Information To order a part contact the nearest Agilent Technologies office See Service and Support on page vi or you can find a list of Agilent Technologies Service Centers on the web at http www agilent com How to Order Parts If you need to order a replacement part contact you nearest Agilent Technologies representative To order a part that is not listed in the replaceable parts lists include the instrument model number complete serial number the description and funct
9. 18 11 3 6 Agilent Technologies 85325A Operating and Service Manual General Information Maximum RF Cable Lengths Formulas for Cable The maximum LO source frequency required when driving the Length Maximums HP Agilent 11970x waveguide mixers is 6 11 GHz The two cable lengths Lg and Ly are affected by this maximum frequency Refer to the diagram below MIXER LO IN 14 dBm minimum 16 dBm recommended 85326A Test or Reference Adapter L orL 20 8 dBm from LO OUT 3 to 6 GHz typical 85309A LO Input 0 dBm required LO SOURCE This is the range of LO frequencies used during mm wave operations cblmax2 cdr Figure 3 2 Ls Lr Lr Cable Lengths Example The maximum length of the LO cables Lp or Lr is a function of a the LO power required by the mixers b the LO output power available from the HP Agilent 85309A across the LO frequency range 3 to 6 GHz c theloss through other microwave components in the LO path NOTE Test and reference cables must be the same length The output LO power of the HP Agilent 85309A is normally greater than 20 8 dBm between 3 and 6 GHz The mixers require a nominal 16 dBm 14 dBm minimum The difference between these two LO power levels 20 8 dBm and 16 dBm determines the maximum loss of the test and reference path Agilent Technologies 85325A Operating and Service Manual 3 7 CAUTION General Information Maxi
10. 3 33 50 U 3 40 60 V 4 50 15 W 6 15 110 1 6 Agilent Technologies 85325A Operating and Service Manual Table 1 3 Installation Receiver Settings c Ifsource 1 is an HP Agilent 8340 41 enter the DENOM value in Table 1 2 on page 1 6 for your band Terminate with x1 11 Press OFFSET FREQUENCY 0 x1 DONE 12 Press DEFINE SOURCE 2 MULTIPLIER NUMER 1 x1 13 Press MULTIPLIER DENOM and enter the value shown in Table 1 3 remember to terminate with x1 Lo Source Multiplier DENOM Table Band DENOM Value Start Freq GHz Stop Freq GHz R 8 26 5 40 Q 10 33 50 U 10 40 60 V 14 50 75 W 18 15 110 14 Press OFFSET FREQUENCY 2 0 MHz DONE 15 Press RECEIVER CONSTANT FREQUENCY 2 0 MHz 16 Press DONE MULT SRC ON SAVE 17 Press STIMULUS MENU POWER MENU POWER SOURCE 1 0 x1 POWER SOURCE 2 1 0 x1 PRIOR MENU STEP 18 Enter the start and stop frequencies using the START and STOP keys Use the start stop frequencies shown in Table 1 2 for your specific mixer Agilent Technologies 85325A Operating and Service Manual 1 7 NOTE CAUTION Initial Setup Initial Fixed Attenuator Value Selections NOTE Installation Mixer LO Power Level Adjustment Mixer LO Power Level Adjustment Brackets indicate a front panel key or a computer key board Braces indicate a display softkey selection It is critical that y
11. 85325A B mixers HP Agilent 11970 Series Mixers The receiver performance verification checks the receiver section of the antenna measurement system The tests are divided into two sections Sets up the millimeter wave system for verification It is also used to input the system hardware s model and serial numbers These test the various parameters of the receiver system The results of these tests are used to calculate the specified parameters in the section below It is possible to have one of these tests fail but still be within the specified parameters of the millimeter subsystem These tests consist of RF to IF Conversion Measures the power loss of the mixers when the RF signal is converted to the IF signal This is not a specified system performance parameter IF Noise Measures sensitivity the RMS noise level of the trace data when the test or reference channels are terminated with a 50 ohm load This is not a specified system performance parameter Crosstalk Measures signal leakage between the antenna reference and the test channels This is a specified system performance parameter Compression Measures input power at which the mixers exhibit 0 1 dB compression This is a specified system performance parameter 4 4 Agilent Technologies 85325A Operating and Service Manual Calculation Parameters Section System Performance Verification Receiver Performance Verification The results of the above section is used to
12. 85325A mixers To adjust LO power for the other mixers refer to the operating manual for those mixers o 14 75 to 16 25 dBm Proper LO power no further adjustment is needed o Greater than 16 25 dBm Add attenuation inside the test module until power is between 15 and 16 25 dBm 3 If you have more than one test module repeat the power measurement the previous two steps for each test module Agilent Technologies 85325A Operating and Service Manual 1 15 NOTE NOTE Installation Mixer Operational Check Mixer Operational Check Brackets indicate a front panel key or computer keyboard Braces indicate a display softkey selection When installing the mixers connect the 3 5 mm cables to the test reference modules before connecting them to the mixers This will minimize the danger of an electrostatic discharge damaging the mixers 1 Make sure the equipment is connected as shown in Figure 1 5 on page 1 13 2 Press STIMULUS MENU STEP 3 Enter the start and stop frequencies of your millimeter band 4 Make sure averaging is OFF by pressing RESPONSE MENU AVERAGING OFF 5 Measure the al input as follows If using an HP Agilent 8510 press PARAMETER MENU USER 1 a1 If using an HP Agilent 8530 press PARAMETER MENU SERVICE PARAMETERS SERVICE 1 a1 The signal you are measuring is from the coupled arm of the directional coupler 6 Set the display reference value so the trace is centered vert
13. NOTE Refer to Figure 1 1 for other system connections iia refcon Figure 1 8 Reference Mixer Connections Adjust the LO Power to 1 the Test Mixer POWE METER mmm O 8485A POWER SENSOR Zero the power meter Measure the LO power output of the test module as shown in Figure 1 6 TEST MODULE 85326 60001 ACTUAL LO CABLE LO OUT a LO IF TO 85309A testpwr Figure 1 6 LO Power Measurement Point for Test Module The LO power should be between 16 and 17 dBm If the LO power is outside this range you must change the amount of attenuation inside the test module This is accomplished by adding or removing attenuators inside the module Use various combinations of the 1 2 and 4 dB attenuators to adjust the LO power to the required range If you have more than one test module repeat power measurement for each test channel module as explained above Agilent Technologies 85325A Operating and Service Manual 1 13 Procedure 2 Initial Setup Checking the Reference LO Power Installation Adjustment Procedures This procedure applies to systems that use HP Agilent 85320A B mixers in addition to the Agilent 85325A 1 Refer to the detector voltage label on the HP Agilent 85320B reference mixer Set the HP Agilent 85309A LO POWER ADJUST control to ma
14. a diplexer which allows the LO and IF signals to travel through the same cable This allows you to use a single ring rotary joint for the antenna under test 5 4 Agilent Technologies 85325A Operating and Service Manual HP Agilent 85309A LO IF NOTE Unit LO Source Service Theory of Operation The LO IF unit performs the following functions It amplifies and distributes LO power to the mixer modules It keeps LO power at the desired power with it s automatic leveling control ALC circuitry It receives IF power from each mixer module amplifies it and sends the TF signals to the receiver It reduces crosstalk between the test and reference channels The LO source supplies the LO signal which allows the mixers to downconvert RF frequencies to a lower IF frequency The LO signal is amplified by the HP Agilent 85309A LO IF unit which then splits the LO signal and routes it to both mixer modules The LO source is controlled by the receiver using the system bus The receiver s system bus designates the LO source as SOURCE 2 In Turbo Mode configurations the LO and RF sources are connected to the main GPIB bus If you use a synthesized LO source you must connect the timebase reference oscillators of the RF source LO source and receiver together This ensures that the downconverted IF frequency is exactly 20 MHz If distance prohibits the timebase connections then adjustments to the LO timebase must be performed
15. calculate the specified parameters of the millimeter subsystem These tests consist of Tracking Results Calculates the conversion gain tracking between channels using RF to IF conversion measurements from the first section This is not a specified system performance parameter Sensitivity Results Calculates the actual sensitivity of the receiver in RMS power using IF Noise and RF to IF Conversion measurements from the first section This is a specified system performance parameter Crosstalk Results isolation Calculates the actual crosstalk between all channels using Crosstalk and RF to IF Conversion measurements from the first section This is a specified system performance parameter Dynamic Range Results Calculates the dynamic range of the system using Compression IF Noise and RF to IF Conversion measurements from the first section This is a specified system performance parameter Agilent Technologies 85325A Operating and Service Manual 4 5 System Performance Verification Setting Up The Equipment Setting Up The Equipment Procedure 1 The receiver LO IF unit mixers LO source and cables should be in the same configuration in which they are normally used Make sure that all cables are connected properly All connectors should be properly torqued refer to Table 4 3 for proper torque specifications Table 4 3 Proper Connector Torque Connacldr Torque Torque Torque Wrench cm kg N cm in lbs Part Nu
16. cooo CE o 10 MHz Receiver TS REF Address 16 10M z RFOUT OUTPUT RE System Bus System Bus INPUT 3 Connect if possible in your system 400 a POWER FREQUENCY COMPUTER e METER COUNTER PRINTER Mem m eco o s E i E Address Address Address 13 ot 20 dB i Pad e D E d Q U M E N GPIB Bus GPIB Bus initial2 cdr Figure 4 1 Initial Equipment Configuration NOTE This procedure assumes you will be using some of the cables from your actual range specifically the cables between the LO IF unit and the mixers This requires that the cables be pulled from their installation location so that the mixers can be placed near the verification system If the cables cannot be pulled they must be tested separately In this case the mixers should be connected to the verification system with a backup set of HP Agilent 85381 cables of the same type and length as the cables normally used in the system Agilent Technologies 85325A Operating and Service Manual 4 7 Table 4 4 RF to IF Conversion IF Noise Measurements Channel Crosstalk System Performance Verification Setting Up The Equipment 3 Turn on all equipment and allow it to warm up for one hour If you cannot bring the mixer down from the antenna tower consider taking the RF source and power meter up to the mixers In this case two additional GPIB extenders will be required One to connect the power meter to the general GPIB bus and one to con
17. frequencies for HP 11970A Q U V W 1 7 system phase lock settings 1 5 T test equipment 5 7 recommended 4 1 test equipment recommended 4 1 test mixer adjusting LO power 1 15 test module 5 4 Index 2 Agilent Technoligies 85325A Operating and Service Manual theory of operation 5 2 torque connector 4 6 torque specifications for cables 1 24 transmitter section 5 3 purpose of each device 5 3 U using an HP 8350 LO power source 1 18 using the HP 8340 41 RF source 1 23 W waveguide accesory hardware kit 1 23 accessory hardware kit 1 3 connecting 1 23 connector alignment 2 2 waveguide alignment see Appendix B Agilent Technoligies 85325A Operating and Service Manual Index 3 4 Agilent Technoligies 85325A Operating and Service Manual
18. press TEST SET 3 1 x1 6 If using an HP Agilent 8530 press CONVERTER SET ADDRESS 3 1 x1 Press RECALL MORE FACTORY PRESET Press SYSTEM MORE SYSTEM PHASELOCK a If using a synthesized LO select LOCK TYPE NONE b Ifusing an HP Agilent 8350 source select LOCK TYPE EXTERNAL Agilent Technologies 85325A Operating and Service Manual 1 5 NOTEI Installation Receiver Settings 7 Press PRIOR MENU POWER LEVELING SOURCE 1 MM MODULE LEVELING In some setups SOURCE 1 MM MODULE LEVELING is not appropriate Select SOURCE 1 INTERNAL if O O Using an HP Agilent 8510B Using an HP Agilent 8510C with firmware Revision 6 1 or lower The source interface cable is not connected to the HP Agilent 836xx Using an HP Agilent 8340 41 and it is not connected as shown in Appendix A 8 Press 9 SOURCE 2 INTERNAL PRIOR MENU EDIT MULT SRC Press DEFINE SOURCE 1 MULTIPLIER NUMER 1 x1 10 Press MULTIPLIER DENOM and do one of the following a If source 1 the RF source is an HP Agilent 836xx and the source interface cable is connected press 1 x1 If source 1 is an HP Agilent 836xx and the source interface cable is not connected enter the DENOM value for your band shown in Table 1 2 remember to terminate with x1 Table 1 2 Rf Source DENOM Value Table Band DENOM Value Start Freq GHz Stop Freq GHz R 2 26 5 40 Q
19. that specific Agilent Technologies products must perform as a system in accordance with the foregoing warranty then that warranty will apply to those Agilent Technologies products as a system and Customer retains sole responsibility to ensure the year 2000 readiness of its information technology and business environment The duration of this warranty extends through January 31 2001 The remedies available under this warranty will be defined in and subject to the terms and limitations of the warranties contained in the contract of sale To the extent permitted by local law this warranty applies only to branded Agilent Technologies products and not to products manufacture by others that may be sold or distributed by Agilent Technologies Nothing in this warranty will be construed to limit any rights or remedies provided elsewhere in the contract of sale with respect to matters other than year 2000 compliance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products For assistance call your local Agilent Technologies Sales and Service Office refer to Service and Support on page vi Agilent 85325A Operating and Service Manual v Service and Support Any adjustment maintenance or repair of this product must be performed by qualified personnel Contact your customer engineer through your local Agilent Technologies Service Center You can find a list of local serv
20. 1390 0765 With the Agilent 85326A T 10 TORX Driver 1 1 1 8710 1623 5 16 inch Wrench 1 1 1 8720 0015 4 dB Attenuator 1 2 3 0955 0208 2 dB Attenuator 2 3 4 0955 0301 1 dB Attenuator 2 3 4 0955 0321 With both Operating and Service 1 1 1 85325 90065 Manual 1 This attenuator is shipped inside the test module 2 These attenuators are shipped inside the test and reference modules Agilent Technologies 85325A Operating and Service Manual 3 5 General Information Maximum RF Cable Lengths Maximum RF Cable Lengths In millimeter wave systems there is a length limit on the HP Agilent 85381A LO cable that goes from the LO source to the LO INPUT of the HP Agilent 85309A Ls and the Lp cable the cable that goes between the REF LO OUT of the HP Agilent 85309A and the LO IN on the reference module Ls source module cable Lp reference module cable Ly test module cable Refer to Figure 3 1 and Table 3 6 to determine the maximum Lg length 85326 60001 LO IF Lt 85326 60002 85399A IF QUT REF IF IN TEST LNF LOIN Lr REFLO OUT DET OUT REF DET IN URC LO SOURCE Ls SEES NOTE It is assumed that Lr and Lt are approximately the same length Figure 3 1 Ls Lg and Lg Cables Table 3 6 Maximum Cable Lengths meters Cable Type LO Frequency max LO Source to HP Agilent 85309A to GHz HP Agilent 85309A Ls Agilent 85325A B Lp Lr HP Agilent 85381A 6 17 6 MaCom FA29R X 6
21. 301B Operating and Service Manual for HP Agilent 85309A adjustment procedures If the LO and RF source s timebases are not connected together refer to either of the manuals mentioned above for adjustment instructions The LO power to the test and reference modules must be adjusted during installation Refer to Installation Chapter 1 for more instructions Agilent Technologies 85325A Operating and Service Manual 5 15 Service Replaceable Parts 5 16 Agilent Technologies 85325A Operating and Service Manual Using the HP Agilent 8340 41 in Your System Using the HP Agilent 8340 41 in Your System Connect an HP Agilent 8340 41 RF source as shown in Figure A 1 HP 8349B f HP 8355x SRC INTERFACE EE eee z S RF our aaa 5061 5391 RF OUT 0 5V GHz ee HP 8340 41 RF Source fig8340 Figure A 1 HP Agilent 8340 41 RF Source Agilent Technologies 85325A Operating and Service Manual A 1 Using the HP Agilent 8340 41 in Your System A 2 Agilent Technologies 85325A Operating and Service Manual Handling and Storing Connecting Waveguide Connecting the Waveguide P roperly Connecting the Waveguide Properly Handle and store the devices with care their continued performance and accuracy dep
22. 4 Measuring LO Power from the Reference Module 1 11 Figure 1 5 Reference Mixer Connections lesu 1 13 Figure 1 6 LO Power Measurement Point for Test Module 1 13 Procedut 2 i terea beer e RET ex REEF TENERS EE YER 1 14 Mixer Operational Chek issus kere vendor kobe See Y ad ex en 1 16 Figure 1 7 Test Mixer Connections clle 1 17 When Using an HP Agilent 8350 LO Source 1 18 CUO ls SEO io uu condo kueren AERE NROS QUEE RE kes 1 19 Final InstallalOH 4 dessus err RW EE PUR RE COS a ER ERES PSS YER 1 20 Figure 1 6 Leveling Control Cables lessen 1 20 Figure 1 9 Agilent 85325A 85326A Installation Block Diagram Coupled RECTEnGE Lossskx be REX NE V RERO e eR es 1 21 Figure 1 10 Agilent 85325A 85326A Visual Installation Diagram Coupled Reference sc cbscccc carne we erts eee cede 1 22 Figure 1 11 Agilent 85325A 85326A Installation Block Diagram Rodiated Reference lt 0 46 dan bee ENG KEES EX GaSe RE ESSE 1 23 If Using an HP Agilent 8340 41 RF Source 1 23 Connecting the Waveguide cscc baacas ke ade deed dane sd E 1 23 Proper Torque for Coax Connections 000005 1 24 Table 1 5 Proper Connector Torque lees 1 24 Agilent Technoligies 85325A Operating and Service Manual Contents 1 Turn ON AC Power 0 0 ccc es 1 24 Operation Mixer Operating Parameters 5 occorre rem rh Rs 2 2 Maxnnum RF Input PONE oc ocean keds ers oo ak
23. 970 MIXER Test a Antenna qp xa i 1m cS T l 365A m 8355xA Reference gt amp 4 IF Lo IN OUT fea LLULLU i E Antenna H SIT gi amp Test Module 365 85326 60001 CEA 11970 M dn 4 EEG lt Sa 85326A IF MIXER uen Cable length 1 limitation 8349B a Ref Module See Note 1 A lt E e 4 5 2 85326 60002 e EH NE m v 8 IF IN IF OUT REF IF IN 85309A Hi Lo OUT LO IN REF LO OUT um TEST LOAF S DET OUT REF DET IN z Lo INPUT B 5 REF IF TEST IF d OUT OUT RF SOURCE To Receiver RF Our INTERFACE our RF SOURCE LO SOURCE If Using an HP Agilent Figure 1 11 8340 41 RF Source Connecting the Waveguide antenna Agilent 85325A 85326A Installation Block Diagram Radiated Reference If you are using an HP Agilent 8340 41 as an RF source refer to Appendix A for setup information When connecting a waveguide refer to Appendix B Connecting the Waveguide Properly Use the Waveguide Accessory Hardware Kit when connecting the waveguide components Agilent Technologies 85325A Operating and Service Manual 1 23 Proper Torque for Coax Connections Table 1 5 Turn ON AC Power Installation Final Installation The coax RF connectors in the setup
24. E Agilent Technologies Agilent Technologies 85325A R Q U V W Millimeter Subsystem Agilent Technologies 85326A Millimeter Wave Interface Kit Operating and Service Manual Manual part number 85325 90061 Printed in USA November 1999 Revision 1 0 Notice The information contained in this document is subject to change without notice Agilent Technologies makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Agilent Technologies shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material Agilent Technologies assumes no responsibility for the use or reliability of its software on equipment that is not furnished by Agilent Technologies This document contains proprietary information which is protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated to another language without prior written consent of Agilent Technologies RESTRICTED RIGHTS LEGEND Use duplication or disclosure by the U S Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 for DOD agencies and subparagraphs c 1 and c 2 of the Commercial Computer Software Restricted Rig
25. JUST setting is ever changed you can return to the appropriate power level for the millimeter system by referring to this setting To return to the original power level Turn the LO POWER ADJUST knob until the voltage reading matches the value written above 1 14 Agilent Technologies 85325A Operating and Service Manual NOTE Adjust the LO Power to the Test Mixer NOTE Installation Adjustment Procedures When performing the following step connect the LO IF and detector voltage cables to the reference module first then connect cables to the mixer This lowers the risk of electrostatic damage to the mixers 4 Connect the reference mixer to the reference module and directional coupler refer to Figure 1 5 on page 1 13 The warning beeper on the receiver should stop 5 Press ENTRY OFF to remove the error message from the receiver display 1 Measure the LO power output of the test module as shown in Figure 1 6 on page 1 13 2 Look up the power level see below and perform the corresponding action If power is o Less than 14 75 dBm Reduce the amount of attenuation in the test module until power is between 14 75 and 16 25 dBm If you have removed all attenuators from the test module and power is still less than 14 75 dBm this means that you cannot switch between the Agilent 85325A mixers and your other mixers without readjusting LO power each time Perform Procedure 1 on page 1 11 to adjust LO power for the Agilent
26. N RESULT IN DAMAGE TO THE MIXERS Ref Module Part of 85326A 85326 60002 IF OUT REF IF IN 85309A LO IN CAUTION _ REF LO our um Lid vet out CAUTION ser per i 5 Figure 1 8 Leveling Control Cables If you disconnect the detector voltage cable while the LO source is on LO power will go to maximum This will damage the millimeter wave mixers as soon as they are connected If you disconnect the LO signal cable the LO power will go to maximum while the HP Agilent 853094 tries to send the appropriate amount of power to the mixers If you then reconnect the LO cable the LO power to any connected mixer will initially be at damage levels The HP Agilent 85309A will detect the high LO power and reduce it but the mixers could be damaged before power is reduced Remember that the HP Agilent 85309A sends the same LO power to both mixers If high LO power occurs then both millimeter wave mixers may be destroyed Do not connect LO power to the HP Agilent 11970 mixers until you adjust the LO power Refer to the Mixer LO Power Level Adjustment on page 1 8 If you connect LO power before adjusting it you could permanently damage the mixers 1 20 Agilent Technologies 85325A Operating and Service Manual Installation Final Installation Procedure 1 Move all system components to their final location 2 Connect the system using one of these methods a If you are using a coupled reference channel con
27. Power Level Adjustment on page 1 8 If you connect LO power before adjusting it you could permanently damage the mixers Agilent Technologies 85325A Operating and Service Manual 1 1 Table 1 1 Installation Required Equipment Required Equipment The following equipment is required when performing installation Equipment Required Item Qty HP Agilent Model or Part Number Power Meter 1 HP Agilent 436 437 438 E4418 or E4419 Power Sensor 1 HP Agilent 8485A 8487A or 8481A 5 16 inch Wrench 1 08555 20097 supplied with Agilent 85326A T 10 Torx Driver 1 8710 1623 Supplied with Agilent 85326A 1 4 inch Wrench 1 8710 0510 supplied with Agilent 85325A 3 16 inch Wrench 1 8710 0013 supplied with Agilent 85325A 3 32 Hex Ball Driver 1 8710 1539 Supplied with Agilent 85325A Adapter 3 5 mm f to f 1 1250 1749 1 2 Agilent Technologies 85325A Operating and Service Manual Installation Initial Setup Initial Setup Connect the equipment as shown in Figure 1 1 LO OUT REFERENCE TEST MODULE MODULE 85326 60002 85326 60001 DET LO IF LO IF OUT O
28. UT 8355xA Ji E REF IF IN 85309A TEST LO IF 8349A MT SEE LO our LO INPUT REF DET IN NET Z TEST SET K TERCONNECT d Im P I B 10 MHz REF 10 MHz REF EMT oda g OUTPUT E RF SOURCE posue S LopHascLock LO SOURCE WB 8 8 Required for 8350 Only Ce ooo Ea 10 MHz rn NT it 1 FO aaa System Bus System Bus INPUT F Figure 1 1 Initial Setup NOTE It is important that you connect the mm wave head to the RF source as shown in Figure 1 1 before using the procedures in this manual The mm wave head configures the RF source so it will accept mm wave band start and stop frequency commands from the receiver Using an If you are using an HP Agilent 8340 41 as an RF source refer to Appendix HP Agilent 8340 41 A for setup information RF Source Connecting the Waveguide When connecting the waveguide refer to Appendix B Connecting the Waveguide Properly Use the waveguide accessory hardware kit when connecting the waveguide components Agilent Technologies 85325A Operating and Service Manual 1 3 10 MHz Reference Connection NOTE Procedure Installation Initial Setup The 10 MHz reference connection see Figure 1 1 on page 1 3 between the RF and LO sources locks the signal frequency of the two sources together When the sources are separated by a long distance make sure the 10 MHz signal is at least 17 dBm or greater at the 10 MHz REF INPUT The 10 MHz REF OUTPUT produces 0 dBm Checking the Sign
29. UT SOURCE Our 7p N INTERFACE RF SOURCE LO SOURCE NOTE Refer to Figure 1 1 for other system connections TE testcon Figure 1 7 Test Mixer Connections NOTE Perform steps 13 through 18 ONLY if using a synthesized LO source Proceed to When Using an HP Agilent 8350 LO Source on page 1 18 if you have an HP Agilent 8350 LO source Agilent Technologies 85325A Operating and Service Manual 1 17 When Using an HP Agilent 8350 LO Source Installation Mixer Operational Check 13 14 15 16 17 18 Determine which receiver input has the test signal connected to it b1 b2 or a2 Measure that input using the USER softkeys on HP Agilent 8510 or SERVICE PARAMETER softkeys on HP Agilent 8530 Press DISPLAY SELECT DEFAULTS DEFAULT to MEMORY 1 DATA and MEMORY Adjust the display reference so the two traces are centered vertically Refer to the value you wrote down in Step 7 Set display scale to 1 dB division Make sure the two signals are within 3 dB of each other If your system has more than one test channel check each one in the same way Perform the following steps ONLY if using an HP Agilent 8350 LO source l 2 Press DATA and MEMORY On the rear panel of the HP Agilent 85309A a Disconnect the green b2 wire from the TEST IF OUT connector b Move the brown al cable from the REFERENCE IF OUT connector to the TEST IF OUT connector Make sure the two displayed traces are with
30. al You can check to see if a 10 MHz signal is reaching the destination source as follows This procedure assumes at least one source has a front panel 1 Setup the sources so that they are not under HP Agilent 8530 control 2 Connect the 10 MHz cable between the LO and RF source 10 MHz REF jacks Make sure you use the 10 MHz REF IN on the source with a front panel This will be called the receiving unit 3 Preset the sources 4 If xt REF is displayed on the bottom left of the receiving units display the signal is satisfactory 1 4 Agilent Technologies 85325A Operating and Service Manual NOTE Setting Up the Receiver NOTE Installation Receiver Settings Receiver Settings Brackets indicate a front panel key or on a computer key board Braces indicate a display softkey selection 1 Turn ON the RF source Make sure it is set to GPIB address 19 2 Turn ON the LO source Make sure it is set to GPIB address 18 3 Turn ON the following components in the order shown a RF power amplifier if used b HP Agilent 85309A c Receiver If your LO source is an HP Agilent 8350 it is normal for CAUTION NO IF FOUND or CAUTION SOURCE 1 FAILURE RF UNLOCKED to appear on the screen at this time The message will go away later when you connect the reference mixer 4 Press USER PRESET SYSTEM GPIB ADDRESSES SOURCE 2 1 8 x1 sets address of the LO source 5 Ifusing an HP Agilent 8510
31. alues for HP 11970A Q U V W 1 7 O offset frequency setting 1 7 operation 2 1 theory of 5 2 operational check mixers 1 16 optional 10 MHz reference connection 1 4 P perform final installation 1 1 performance verification 4 1 compression 4 4 crosstalk 4 4 dynamic range results 4 5 IF noise 4 4 RF to IF conversion 4 4 sensitivity results 4 5 tracking results 4 5 phaselock settings 1 5 power adjusting LO power to test module 1 15 checking reference LO 1 14 LO adjusting if using HP 85325A in conjunction with other mixers 1 14 adjusting if using HP 85325A mixers 1 11 power LO 2 2 product description 3 1 proper waveguide connector alignment 2 2 R receiver section isolators 5 4 mixers 5 4 receiver settings 1 5 recommended test equipment 5 7 reference mixer connections 1 13 reference module 5 4 reference module pad placement diagram 1 10 required LO power 2 2 RF cable lengths maximum 3 6 RF input power maximum 2 2 S saving the setup 1 19 selecting reference and test attenuation for the HP 85326A 1 9 service 5 1 setting up the receiver 1 5 settings multiple source mode 1 6 offset frequency 1 7 phaselock 1 5 power leveling 1 6 HP 8510B 1 6 HP 8510C 1 6 power leveling settings source cable not connected 1 6 receiver 1 5 setup saving 1 19 source LO 5 5 source information mm wave 3 4 specifications 3 2 R Q U bands 3 2 V W bands 3 3 start and stop
32. ation variable attenuator and directional coupler for each band U band Contact Agilent Service and Support see Service and Support on page vi for U band verification information Recommended Test Equipment banded Item Critical Specification Recommended Model or Part Number Power Sensor No substitute R band HP Agilent R8486A Q band HP Agilent Q8486A V band HP Agilent 8486A W band HP Agilent W8486A Fixed Termination Return loss gt 30 dB R band HP Agilent R910A Q band HP Agilent Q910A V band HP Agilent V910C W band HP Agilent W910C Variable Vane Attenuator 0 to 40 dB attenuation R band HP Agilent R 382A Q band HP Agilent Q382A V band Millitech DRA 15 v band W band Millitech DRA 10 w band Directional Coupler Coupling factor 10 dB R band HP Agilent R752C Q band HP Agilent Q752C V band HP Agilent V752C W and HP Agilent W752C 1 You must have a fixed termination for each test channel of your system Agilent Technologies 85325A Operating and Service Manual 4 3 Overview System Configuration Measurement Parameters Section System Performance Verification Receiver Performance Verification Receiver Performance Verification The performance verification software is used to verify the performance of millimeter and microwave downconverters These downconverters are used in the HP Agilent 8511A B and the HP Agilent 85301B Systems with HP Agilent 85320A B or HP Agilent
33. ce Theory of Operation The transmitter consists of a synthesized RF source amplifier mm wave source module and transmit antenna The RF source and transmit antenna provide the stimulus signal for the antenna being tested The RF source is controlled by the receiver using the system bus The RF source is called SOURCE 1 in the receiver s softkey menus GPIB extenders are required if the distance between the receiver and RF source exceeds IEEE 488 2 limits Refer to Allowable GPIB Cable Lengths below The Purpose of Each Device in the Transmitter Section The RF source and amplifier provide the 17 dBm power level required by the mm source module This module multiplies the RF frequency by a factor of 2 3 4 5 or 6 depending on the model used The source module interface SMD allows the source module to become an integrated part of the RF source With the interface cable connected the RF source knows that multiplied frequencies are being produced Because of this the source responds properly when the receiver asks for frequencies above its normal range The source module accepts RF input power levels from 17 to 27 dBm The power output of the source module can be changed with the STIMULUS controls on the receiver When the SMI cable is used the HP Agilent source module produces leveled mm wave power Allowable GPIB Cable Lengths You are allowed 2 meters of cable length for each instrument that is connected to the main GPIB bus o
34. ct 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 viii Agilent 85325A Operating and Service Manual Model Agilent 85325A and Model Agilent 85326A Declaration of Conformity This is to certify that this product meets the radio frequency interference requirements of Directive FTZ 1046 1984 The German Bundespost has been notified that this equipment was put into circulation and has been granted the right to check the product type for compliance with these requirements If test and measurement equipment is operated with unshielded cables and or used for measurements on open set ups the user must insure that under these operating conditions the radio frequency interference limits are met at the border of his premises Hiermit wird bescheinigt dass dieses Gert System in bereinstimmung mit den Bestimmungen von Postverfgung 1046 84 funkentst rt ist Der Deutschen Bundespost wurde das Inverkehrbringen dieses Gertes Systems angezeight und die Berechtigung zur berprfung der Serie auf Einhaltung der Bestimmungen eingerumt Zustzinformation fr Mess und Testgerte Werden Mess und Testgert
35. d the connection 11 Check the flange matings for any gap A good connection has no gaps between the connected waveguide flanges and the waveguide walls are flush there is no step or offset 12 Make sure that all four screws are equally torqued NOTE Remember the most common cause of measurement error is a poor connection B 4 Agilent Technologies 85325A Operating and Service Manual Connecting the Waveguide P roperly Aligning Precision and 1 Place an alignment pin with head in the corner hole of one flange Non Precision Flanges Place a second alignment pin in the diagonal corner hole of the second flange see Figure B 5 Alignment Pin with head pdev11 cdr Figure B 5 Align Pin with Head 2 Using the pins as guides carefully align the flanges and insert screws in the two open corner holes 3 Place a lock washer and nut on each screw and finger tighten 4 Remove the alignment pins and insert the remaining two screws 5 Place a lock washer and nut on each screw and finger tighten Tighten Flange 6 Inan X pattern for equal compression tighten all four screws see Connections Figure B 6 Do not over tighten Start here pdev12 cdr Figure B 6 Tighten Screws Agilent Technologies 85325A Operating and Service Manual B 5 NOTE NOTE Inspect Flange Connections Connecting the Waveguide P roperly The best connection has symmetrical pressure applied as you gradually tighten the scre
36. e mit ungeschirmten Kabeln und oder in offenen Messaufbauten verwendet so ist vom Betreiber sicherzustellen dass die Funk Entst rbestimmungen unter Betriebsbedingungen an seiner Grund stcksgrenze eingehalten werden Agilent 85325A Operating and Service Manual ix Italics Instrument Display Keycap Softkey User Entry Path Name Computer Display Typeface Conventions Used to emphasize important information Use this software only with the Agilent 00000X Used for the title of a publication Refer to the Agilent 85325A Operating and Service Manual Used to indicate a variable Type LOAD BIN filename Used to show on screen prompts and messages that you will see on the display of an instrument The Agilent 00000X will display the message CAL1 SAVED Used for labeled keys on the front panel of an instrument or on a computer keyboard Press Return Used for simulated keys that appear on an instrument display Press Prior Menu Used to indicate text that you will enter using the computer keyboard text shown in this typeface must be typed exactly as printed Type LOAD PARMFILE Used for examples of programming code endif ifndef NO_CLASS Used for a subdirectory name or file path Edit the file usr local bin sample txt Used to show messages prompts and window labels that appear on a computer monitor The Edit Parameters window will appear on the screen Used
37. end on maintaining precise mechanical tolerances When the devices are not in use replace their protective end caps Unlike threaded devices waveguide mating planes are flanges often precision that you must carefully screw together Always connect waveguide in the same flange orientation For example use the label as a reference and always connect a device with the label facing the same direction Wear While connector wear can eventually degrade performance properly connected waveguide flanges experience very little wear and should have a long life Visual Inspection Each time you make a connection inspect mating surfaces for dirt dust foreign particles or scratches which can degrade device performance A damaged mating surface can damage any good surface connected to it If necessary clean all mating surfaces using alcohol and a lint free swab or cloth Agilent Technologies 85325A Operating and Service Manual B 1 Connecting the Waveguide P roperly Precision Flanges A precision flange has four corner holes for the screws and two precision alignment holes as shown in Figure B 1 below A non precision flange has only the four corner holes Precision Alignment Holes Precision Flange Only pdev8 cdr Figure B 1 Alignment Holes If you wish to connect two precision flanges refer to Aligning Two Precision Flanges on page B 3 If you wish to connect a precision flange to a non precision flange ref
38. er to Aligning Precision and Non Precision Flanges on page B 5 B 2 Agilent Technologies 85325A Operating and Service Manual Connecting the Waveguide P roperly Aligning Two Precision 1 Ifnecessary place slip pins in the top and bottom holes of one flange Flanges see Figure B 2 below Insert Slip Pins pdev9 cdr Figure B 2 Inserting Slip Rings 2 Using the pins as guides carefully align the flanges and insert screws in two opposite corner holes see Figure B 3 below Use pins to align flanges Insert screws in holes A and A or holes Band B pdev10 cdr Figure B 3 Align Flanges Place a lock washer and nut on each screw and finger tighten Insert the remaining two screws Place a lock washer and nut on each screw and finger tighten If necessary remove the alignment pins pl ON eR OS Go to Tighten Flange Connections on page B 4 Agilent Technologies 85325A Operating and Service Manual B 3 Connecting the Waveguide P roperly Tighten Flange 8 Inan X pattern for equal compression tighten all four screws see Connections Figure B 4 Do not over tighten 9 Visually inspect the connection Start here pdev12 cdr Figure B 4 Inspect Flange Connections NOTE The best connection has symmetrical pressure applied as you gradually tighten the screws Inspect Flange Visually inspect a flange connection as follows Connecnons 10 Place an electric light or white paper behin
39. for menus lists dialog boxes and button boxes on a computer monitor from which you make selections using the mouse or keyboard Double click EXIT to quit the program x Agilent 85325A Operating and Service Manual Contents Installation Requited EIUS 1 ceics p e een E cao ER UC oe ERO RC RE d 1 2 Table dai Eoupmem Reguit oc sexa usd vd Re Rede ews ea 1 2 Titel SOW iau ibe deg edu eae e oo PCR ERU OPATR E UR deba Rd 1 3 Figure d i Tutial SOG Lzziweertex eradoeACewakk gy OR Apud 1 3 Using an HP Agilent 8340 41 RF Source 1 3 Connscong the Waveguide Lis ous das LER ERE EXORRER ea 1 3 10 MHz Reference Connection iecosasesakcssesedok e son 1 4 Receiver Semmes serro Gee OR ROOKIE OLOR ER ROLA CR EROR RO RE dg 1 5 satur Upthe Receiver 05 3660 nei ops eset dO SEE Edd 1 5 Table 1 2 Rf Source DENOM Value Table luu 1 6 Table 1 3 Lo Source Multiplier DENOM Table 1 7 Mixer LO Power Level Adjustment 0 0 0 0 0000 1 8 nup ri ereer eneren nE Ae ey ener eee tagehearss 1 8 Initial Fixed Attenuator Value Selections 1 8 Table 1 4 Selecting Agilent 85326A Reference and Teo MPRA aa s doe Rp d ade up OI Dee ERS 1 9 Figure 1 2 Reference Attenuator Installation LL 1 10 Figure 1 3 Test Attenuator Installation ess 1 10 Aol usmmodt Froes 6 nose Ludo dee areae diu Rub wens 1 11 Pree o Licie EE dep Oe oe EY a ae maak domes 1 11 Figure 1
40. going to use the Agilent 85325 A Agilent 85325A mixer configuration Procedure 2 Use this procedure if you are going to reconfigure your system between Agilent 85325 A Agilent 85326A mixers and other mixer types Procedure 2 eliminates the need to readjust LO power when switching between the Agilent 85325A and other mixers This procedure applies to systems that only use Agilent 85325A mixers 5A POWE R SENSOR Zero and calibrate the power meter refer to your power meter manual Determine the power sensor calibration factor at 4 GHz and set the power meter accordingly Connect the power meter as shown in Figure 1 4 REFERENCE MODULE 85326 60002 ACTUAL LO CABLE TO 85309A refpwr Figure 1 4 Measuring LO Power from the Reference Module 4 Measure the power output of the reference module as shown in Figure 1 4 Be sure to measure power at the end of the LO cable Agilent Technologies 85325A Operating and Service Manual 1 11 Adjust the LO Power to NOTE the Reference Mixer Installation Adjustment Procedures 1 Adjust the HP Agilent 85309A front panel LO POWER ADJUST control until the power meter reads between 17 and 17 8 dBm The LO POWER OUT OF RANGE light should be off 2 Note the reading of the HP Agilent 85309A display and write it down here Agilent 85326A DETECTOR VOLTAGE SETTING millivolts If the LO power adjust setting is ever changed you can return
41. hts clause at FAR 52 227 19 for other agencies Agilent Technologies Inc 1400 Fountaingrove Parkway Santa Rosa CA 95403 1799 U S A Copyright Agilent Technologies Inc 2000 il Agilent 85325A Operating and Service Manual What You ll Find in This Manual Chapter 1 Installation Chapter 2 Operation Chapter 3 General Information Chapter 4 Performance Verification Chapter 5 Timebase Check and Adjustment Chapter 6 Service Appendix A Using the HP 8340 41 in Your System Appendix B Connecting the Waveguide Properly Agilent 85325A Operating and Service Manual iii Certification Warranty Warranty Custom systems are warranted by contractual agreement between Agilent Technologies and the customer Agilent Technologies Inc certifies that this product met its published specifications at the time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology NIST formerly NBS to the extent allowed by the Institute s calibration facility and to the calibration facilities of other International Standards Organization members This Agilent Technologies system product is warranted against defects in materials and workmanship for a period corresponding to the individual warranty periods of its component products Instruments are warranted for a period of one yea
42. ically Press REF VALUE and turn the rotary knob 7 Write down the reference value you will need it later in this procedure REF VALUE 8 Set display scale to 1 dB division press SCALE 1 x1 1 16 Agilent Technologies 85325A Operating and Service Manual Installation Mixer Operational Check 9 Make sure the signal is at anticipated levels The coupled arm attenuates the output of the HP Agilent 8355xA by 30 dB this can vary depending on the type of coupler used Power flatness should be approximately 3 dB across the band 10 Press DISPLAY DATA gt MEMORY 11 Disconnect the reference mixer from the coupled arm of the directional coupler Put the test mixer in its place as shown in Figure 1 7 NOTE If your system has more than one test channel connect the coupled arm to the first test channel TEST 1 12 Connect the Test LO and Test IF cables to the test module first then to the test mixer TEST DIRECTIONAL MIXER 8355xA ee emmy COUPLER 1L im 1000000010 OU IF E mum 3908 TERMINATION 365A 1m 365A m CE ld e 11970 TEST REFERENCE FY MIXER MERULE 8349B LOAF N REFERENCE MODULE IF OUT REF IF IN 85309A LO IN REF LO OUT TEST LO IF aa o DET OUT REF DET IN LO INPUT E t REF IF TEST IF OUT OUT RF To Receiver RF O
43. ice representatives on the Web at http www agilent tech com services l English index html If you do not have access to the Internet one of these centers can direct you to your nearest representative United States Test and Measurement Call Center 800 452 4844 toll free in US Canada 905 206 4725 Europe 31 20 547 9900 Japan Measurement Assistance Center 81 426 56 7832 81 426 56 7840 FAX 305 267 4245 305 267 42 305 267 4288 FAX Latin America 20 1 800 629 485 Australia 0800 738 378 New Zealand 61 3 9210 5489 FAX Australia New Zealand Asia Pacific 852 2599 7777 852 2506 9285 FAX vi Agilent 85325A Operating and Service Manual 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 procedure practice or the like which if not correctly pe
44. improper or inadequate maintenance 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 iv Agilent 85325A Operating and Service Manual Assistance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES AGILENT TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY YEAR 2000 Agilent Technologies warrants that each Agilent Technologies hardware software and firmware product on Agilent Technologies Corporate Price List dated July 1 1998 or later delivered under the product s contract of sale will be able to accurately process date data including but not limited to calculating comparing and sequencing from into and between the twentieth and twenty first centuries and the years 1999 and 2000 including leap year calculations when used in accordance with the product documentation provided that all other products that is hardware software firmware used in combination with such Agilent Technologies product s properly exchange date data with it If the agreement requires
45. in 3 dB of each other This step is required so the receiver can phase lock If your system has a second test channel a Move the red b1 wire to the TEST IF OUT connector b Make sure the two displayed traces are within 3 dB of each other If your system has a third test channel a Move the yellow a2 wire to the TEST IF OUT connector b Make sure the two displayed traces are within 3 dB of each other Move the al and b2 and possibly b1 and a2 input lines back to their original configuration 1 18 Agilent Technologies 85325A Operating and Service Manual Installation Saving the Setup Saving the Setup NOTE Brackets indicate a front panel key or a computer keyboard Braces indicate a display softkey selection Press SAVE USER PRESET 8j to save the current instrument setup Whenever you press USER PRESET or turn the receiver on the proper settings for this system will be recalled Agilent Technologies 85325A Operating and Service Manual 1 19 CAUTION Installation Final Installation Final Installation This procedure assumes that the other components of the antenna measurement system are already connected Refer to the installation instructions for the receiver or HP Agilent 85310A if necessary CAUTION The two cables marked CAUTION below are part of the LO power leveling loop ALWAYS TURN THE LO SOURCE OFF BEFORE DISCONNECTING EITHER OF THESE CABLES FAILURE TO OBSERVE THIS CAUTION CA
46. ion Agilent Technologies 85325A Operating and Service Manual 2 1 Maximum RF Input Power Maximum LO Input Power Required LO Power Connector Care Proper Waveguide Connector Alignment Operation Mixer Operating Parameters Mixer Operating Parameters Operate the HP Agilent 11970A mixers within the following operating parameters CW No greater than 20 dBm Pulse No greater than 424 dBm at 1 us Average No greater than 20 dBm No greater than 20 dBm The HP Agilent 11970 mixers require 14 to 18 dBm at the LO input Leave the plastic waveguide flange cap on whenever the system waveguide connectors are not connected together This protects the mating surface from scratches which can degrade performance If you are using Q U V or W bands waveguide flanges must be aligned properly or measurement errors may result Refer to Appendix B 2 2 Agilent Technologies 85325A Operating and Service Manual General Information General Information Chapter Contents Product Description Specifications MM Wave Source and Mixer Characteristics Supplied Equipment Maximum Cable Lengths Product Description The Agilent 85325A millimeter subsystem is designed for use with the HP Agilent 85309A distributed frequency converter The subsystem in conjunction with the transmit RF source source amplifier and HP Agilent 85309A downconverts mm wave frequencies to a 20 MHz IF signal This IF signal is requi
47. ion of the part and the number of parts required Address the order to the nearest Agilent Technologies office Agilent Technologies 85325A Operating and Service Manual 5 11 Service Replaceable Parts MM Wave Module Test Module Parts See Figure 5 2 for the component layout Table 5 3 Test Module 85326 60001 Parts Reference Description HP Agilent Part Designator Number ATI 4 dB attenuator coax 0955 0208 AT2 2 dB attenuator coax 0955 0301 AT3 1 dB attenuator coax 0955 0321 El Adapter SMA m m 1250 1159 jl Connector RF type N 08340 60221 J2 3 Connector 3 5 mm bulkhead 5062 6618 Ul Diplexer 5086 7542 W1 Cable SMA m SMB f 85320 60003 W2 RF cable reformable 85325 20004 7dB configuration fie aes 8 C8 AT1 AT2 AT3 85326 60001 priststa cdr Figure 5 2 Agilent 85326A 85326 60001 When Replacing a Diplexer The diplexer has a dot on its case This dot is next to the diplexer s LO port When you install the new diplexer make sure the end with the dot is connected to the cable that goes to the LO OUT bulkhead connectot 5 12 Agilent Technologies 85325A Operating and Service Manual Reference Module See Figure 5 3 for the component layout Table 5 4 Reference Module 85326 60002 Parts Service Replaceable Parts Reference HP Agilent Part Designator Deserption Number ATI 2 dB attenuator coax 0955 0301 AT2 1 dB a
48. ists of the antenna under test reference antenna or directional coupler frequency converter mm wave mixer modules mm wave mixers isolators and the receiver HP Agilent 8530 or HP Agilent 8510 Purpose of Each Device in the Receiver Section There is an isolator on the input of each mixer The isolators perform two functions They improve the impedance match between the test or reference antenna and the mixers The isolators stop mixer harmonic signals from radiating back toward the antennas reducing crosstalk The HP Agilent 8510 or HP Agilent 8530 receivers cannot accept RF frequencies directly Mixers are required to downconvert the RF frequencies to a 20 MHz IF frequency The test and reference mixers are identical but are driven by different types of mixer modules Mixers must receive proper LO power 16 2 dBm or they will not work properly The Reference Module has an internal detector that measures the amount of LO power it receives The detector s output voltage is sent to the HP Agilent 85309A LO IF unit which controls the LO power level This system does not measure power to the test module It is assumed that the electrical distance to the test module is the same as the electrical distance to the reference module Thus the power arriving at the test module will be equal to the power arriving at the reference module The system cannot control test and reference LO power independently The test module has
49. itter that is known to be within specifications Recommended Test Equipment The following tables list major instruments required for performing the millimeter wave measurement system verification Substitute test instruments can be used if they meet or exceed the critical specification shown in the Table 4 1 on page 4 2 and Table 4 2 on page 4 3 No substitute means you must use the listed device Miscellaneous adapters and cables are also required and may not be listed in the tables To determine the recommended equipment for testing each of the millimeter wave system instruments refer to the manual for that instrument Agilent Technologies 85325A Operating and Service Manual 4 1 System Performance Verification Non Banded Equipment Table 4 1 shows equipment that is not millimeter wave band dependent The equipment can be used with any millimeter system Table 4 1 Recommended Test Equipment non banded Item Critical Specification Recommended Model or Part Number The following equipment is part of the antenna measurement system Receiver No substitute HP Agilent 8510B C or HP Agilent 8530A LO Source HP Agilent 8350 HP Agilent 8360 series HP Agilent 8340 or HP Agilent 8341 LO IF Unit No substitute HP Agilent 85309A RF Source HP Agilent 8350 HP Agilent 8360 series HP Agilent 8340 or HP Agilent 8341 Amplifier Frequency band of test HP Agilent 8349A Computer Requirements IBM PC com
50. mber Type N 52 508 45 8710 1935 3 5mm 9 2 90 8 8720 1765 SMA 5 7 56 5 8710 1582 24 9 2 90 8 8720 1765 CAUTION Never exceed the recommended torque when attaching cables 2 Connect test equipment to the system components as shown in Figure 4 1 on page 4 7 The mixers must be placed near the verification system during the performance verification CAUTION Do not connect the LO cables to the mm wave mixers until the LO power level has been checked 4 6 Agilent Technologies 85325A Operating and Service Manual System Performance Verification Setting Up The Equipment ETU STING R FEREI MODULI 85326 60002 no LO OUT TEST PM MODULE 85326 60001 8355xA VANE Tm ATTENUATOR DIRECTIONAL COUPLER WI Eja s e 10dB TERMINATION 309 REF IFIN 85309A TEST LOAF REF LO OUT E az o LO INPUT REF DET IN 8349A TEST IF REF IF POS Z ENC J1 TEST SET b2 Greer xl SM BLANK ane SHORT INTERCONNECT SHORT al Brown RF STOP POS Z STOP QUT SWEEP BLANK SWEEP ao Im 10 MHz REF 10 MHz REF 1 3 INPUT OUTPUT OURCE a i RF SOURCE gt 5 LO PHASELOCK LO SOURCE ce RECEIVER OUT FMIN 2 2222 2 a Required for 8350 Only g
51. mum RF Cable Lengths The loss through the Agilent 85326A and the associated 1 meter cable is about 1 6 dB The loss associated with either the Lp or Ly cables cannot exceed 3 2 dB If using an HP Agilent 85381A type cable the length should not exceed 5 meters The damage level for the HP Agilent 11970x mixer is 20 dBm This can occur if the ALC loop is broken and the proper setup procedure was not used for the Agilent 85325A internal attenuator values 3 8 Agilent Technologies 85325A Operating and Service Manual NOTE System Performance Verification System Performance Verification Introduction This software is intended for R band Q band V band and W band For U band contact Agilent Service and Support office see Service and Support on page vi for U band verification information This performance verification should be performed at least once a year This procedure verifies that the millimeter subsystem meets or exceeds its published specifications Specifications are listed in Chapter 3 If traceability to a local standards organization is required then it can be done with this procedure One such standards organization is the United States National Institute of Standards and Technology The performance verification is composed of two parts transmitter verification receiver verification The transmitter verification should be performed first This allows the receiver verification to be run with a transm
52. must be properly torqued or the system will not provide its best performance Proper connection torque also keeps moisture out the connectors and eliminates radio frequency interference RFI from the connector interface The amount of torque required depends on the type of connector Table 1 5 lists the proper torque values Do not over tighten connectors Proper Connector Torque Connector Torque cm kg Torque N cm Torque in Ibs Mica Pen Type N 52 508 45 8710 1935 3 5 mm 9 2 90 8 8720 1765 SMA 5 7 56 5 8710 1582 2 4mm 9 2 90 8 8720 1765 Turn ON the AC power for all of the components in the following order 1 RF and LO sources RF power amplifier 2 HP Agilent 85309A LO IF unit 3 Receiver 1 24 Agilent Technologies 85325A Operating and Service Manual CAUTION NOTE Operation Operation Leveling Feedback Loop Never interrupt the LO leveling feedback from the reference module leveling coupler detector or leveling cables Doing so can cause the LO power to exceed the damage level of the HP Agilent 11970 mixers Electrostatic Discharge When installing the mixers connect the SMA cables to the test reference modules before connecting them to the mixers This will minimize the danger of an electrostatic discharge damaging the mixers The Agilent 85325 millimeter wave system is designed to be used with a HP Agilent 85310A or HP Agilent 85301B Refer to these manuals for system level operating informat
53. nect the RF source to the receiver system bus 4 Make sure the HP Agilent 8360 s language switches are set to the Analyzer Mode shown in Table 4 4 The HP Agilent 8360A will not work with your antenna measurement system while set to the TMSL mode Switch Positions for Analyzer Mode L3 L2 L1 A5 A A3 A2 Al 0 0 1 X X X X X 0 switch down 1 switch up X leave as is Turn the HP Agilent 8360A OFF then ON to implement the switch change This procedure uses a power meter to calibrate the RF output power from a RF source Next the receiver measures this calibrated RF power across the frequency band It then calculates the difference between the calibrated RF power and the power measured by the receiver The difference between the two is the conversion gain loss Low level noise is the RMS noise level of the trace data when the channel is terminated with a low VSWR termination Each channel mixer is tested across the frequency band to determine the RMS noise level This test measures the signal leakage from one channel to another channel In this test a high power signal is input to one channel mixer and the other channel is terminated with a low VSWR termination Either the al or a2 channel is used to phase lock the system Ensure that the GPIB extender is set to slow mode 4 8 Agilent Technologies 85325A Operating and Service Manual Compression System Performance Verification Setting Up The E
54. nect the system as shown in Figure 1 9 and Figure 1 10 on page 1 22 b If you are using a radiated reference connect as shown in Figure 1 11 on page 1 23 Refer to Figure 1 1 on page 1 3 for system level connections 85325A gt di 8355xA l eee D E T T a lt S ane 365A im e V sesa Wu WY oir REAN 11970 m Lo IREF IF a MAER H 85326A aoe Test Module ee 85326 60001 a eee i Cable length CENE j g z Ref Module o i 5 J 85326 60002 See Note 1 BS IF IN IF OUT REF IF IN 85309A pra ii M EST Ac ON REF LO OUT TEST Lo IF 5 S DET OUT REF DET LO INPUT 129 nU REF IF TEST IF e OUT our RE SOURCE To Receiver RF our INTERFACE 3m L RF Source LO Source fina Figure 1 9 Agilent 85325A 85326A Installation Block Diagram Coupled Reference Agilent Technologies 85325A Operating and Service Manual 1 21 Installation Final Installation From RF Amplifier Source SMI Z Extension Cable To From From 8349 836xx 8349 836xx To From 85309A final3d cdr Figure 1 10 Agilent 85325A 85326A Visual Installation Diagram Coupled Reference 1 22 Agilent Technologies 85325A Operating and Service Manual Installation Final Installation p d 85325A 11
55. ning Two Precision Flanges 0 00 00 eee eee eee B 3 Figure B 2 Inserting Slip Rings selle B 3 Fome Dc Align FIRES isse ei added ue ah ado Rr Rib eden B 3 Figure B 4 Inspect Flange Connections 0 000 00000 B 4 Aligning Precision and Non Precision Flanges B 5 Figure B 5 Align Pin with Head cee eens B 5 Figure B 06 Tighten SCrEWS cack chk peace aa 4 LES RAO E LER DARAN B 5 Agilent Technoligies 85325A Operating and Service Manual Contents 3 4 Agilent Technoligies 85325A Operating and Service Manual WARNING CAUTION Installation Installation This chapter explains how to setup the equipment adjust LO power levels check mixer operation perform final installation This equipment is capable of radiating millimeter wave energy from the end of an unterminated waveguide Do not look directly into the open end of any waveguide when it is connected to a source of millimeter wave energy Take precautions consistent with ANSI C95 1 1982 a study performed by the American National Standards Institute that sets limits for human exposure to microwave and millimeter wave energy Copies of this publication are available from American National Standards Institute 11 West 42 Street New York New York 10036 Telephone 212 642 4900 WEB site www ansi org Do not connect LO power to the HP Agilent 11970 mixers until you adjust the LO power in Mixer LO
56. on eee ees 2 2 Wixi Li Input Power 5 so ossa casos Re quu RU dob Rb qr x 2 2 Regum LO POWBE serrer beruadebPER SORA REOURERU UP qol kde 2 2 CORISCUNU UE saos pRiqassqsqhatensibadeceqd ia ddqi dde 2 2 Proper Waveguide Connector Alignment 2 2 General Information ee DBIBRIS 1 oiu d d p CUR e el dedos F d bold OES dog e b 3 3 1 Product Descnptl n 2 0 2sssc rer rr RR RR ese tentit RR ER 3 1 SS IC ini bs MM beat we wR wee RRS 3 2 ADOL DSCC HONS u ene ipo wp d ih ekeeene dundee diu q S 3 2 Table 3 1 R Q and U Band System Level Specifications 3 2 Table 3 2 V and W Band System Level Specifications 3 3 MM Wave Source and Mixer Characteristics 20 0005 3 4 Table 3 3 MM Wave Source Information l lsss 3 4 Table 3 4 MM Wave Mixer Information lelssu 3 4 Supplied Bquiptaebl zu ie ex uoo he s OR RO RO SCOPE VR AGE n CN 3 5 JUNO N92 DEORE PUTS d udo ones boh pd qud dc quad dab duds 3 5 Maximum RP Cable Lengths 2scoe cese te e eR Rn 3 6 Pie df La Ly and Er CAS ancien gees beak aGR E AC x 3 6 Table 3 6 Maximum Cable Lengths meters Less 3 6 Formulas for Cable Length Maximums less 3 7 Figure 3 2 Ls Lp Lr Cable Lengths Example Lun 3 7 System Performance Verification TROON cathe MER ROCA e bon UR ee Roe De ace eU Rb abd X CREE GR 4 1 Recommended Test Equipment 23242 2ee m epo ee c RE RR dub qut x 4 1 Non Banded Equipment
57. ou set LO power before connecting the HP Agilent 11970 mixers 1 Ifusing an HP Agilent 8530A press DOMAIN FREQUENCY 2 Place the receiver in the single point CW mode by pressing STIMULUS MENU SINGLE POINT 3 Press CENTER and enter the lowest frequency available in your millimeter band The internal fixed attenuator value in the reference module is set so the mixer LO input port is not damaged by excessive power maximum power for an HP Agilent 11970x is 20 dB The maximum unleveled power is possible if the ALC loop of the HP Agilent 85309A and reference module is broken To check what the maximum unleveled power level is 1 Disconnect the detector voltage feedback cable at the reference module while monitoring the power level as shown in Figure 1 4 on page 1 11 Perform the test within the frequency range of operation 2 Install an attenuator in the reference module which has a value that keeps the power level below your mixers damage level See Figure 1 2 on page 1 10 The attenuator values shown in Table 1 4 on page 1 9 can be used if HP Agilent 85381A RF cable assemblies are used 3 Determine the minimum attenuator value for the 85326 60001 test module and the 85326 60002 reference module using Table 1 4 on page 1 9 1 8 Agilent Technologies 85325A Operating and Service Manual Installation Mixer LO Power Level Adjustment Table 1 4 Selecting Agilent 85326A Reference and Test Attenuation
58. our HP Agilent 8510C or8510C opt O11 T system System Spectrum Analyzer Up to 20 GHz Various IT Additional Mixer mm band must match your system HP Agilent 11970A IT 1 installation O operation P performance verification T troubleshooting and repair 2 Located in the HP Agilent 85310A manual 3 Must be controlled independently of receiver 4 Type N to 3 5 f Type N f to 3 5 f 3 5 f to 3 5 f 5 Recommended for on site use 6 Required by spectrum analyzer 5 8 Agilent Technologies 85325A Operating and Service Manual Band Dependent Equipment NOTE Service Recommended Test Equipment Table 5 2 shows equipment that is mm wave band dependent Fixed terminations variable attenuators and directional couplers are only usable in one band Therefore if your system has more than one mm wave band you must have a termination variable attenuator and directional coupler for each band U band Contact HP Service and Support see Service and Support on page vi for U band verification information Table 5 2 Recommended Test Equipment Banded Recommended Model or Part Item Critical Specification Number Use Power Meter HP Agilent E4418 and E4419 Power Sensors Return loss gt 14 dB R band HP Agilent R8486A PT Q band HP Agilent Q8486A V band HP Agilent V8486A W band HP Agilent W8486A Fixed Termination Return loss gt 30 dB HP Agilent x910A PT Variable Vane Attenuator
59. patible computer No substitute Pentium 133 or better No substitute Windows 959 Windows 989 Windows NT 4 0 installed GPIB interface card and cable Hewlett Packard or National Instruments HP BASIC for Windows version 6 32 or later installed A CD ROM reader Internet Explorer 94 0 or higher or Netscape 4 0 or higher System performance verification software HP Agilent 8511A B and Antenna Measurement S ystem Performance Verification S oftware Additional Equipment Needed Printer Windows compatible Power Meter No substitute HP Agilent 436A 437B 438A E4418 E4419 Power Sensor No substitute HP Agilent 8485A 8481A or 8487A Connector Adapters Type N and 3 5mm Various Torque Wrench No substitute Refer to Table 4 3 on page 4 6 1 Not all antenna test systems will use an amplifier 2 For traceability verification the Power Meter and Power Sensor should be traceable No other traceable instruments are required 3 Type N m to 3 5 f type N f to 3 5 f 3 5 f to 3 5 f 4 2 Agilent Technologies 85325A Operating and Service Manual Band Dependent Equipment NOTE Table 4 2 System Performance Verification Table 4 2 shows equipment that is millimeter wave band dependent Fixed terminations variable attenuators and directional couplers are only usable in one band Therefore if your system has more than one millimeter wave band you must have a termin
60. periodically Refer to the HP Agilent 85310A Operating and Service Manual for instructions The HP Agilent 85310 is a product that contains the HP Agilent 85309A along with microwave frequency mixers The HP Agilent 85310A manual describes the HP Agilent 85309A LO IF unit in great detail Non synthesized LO sources HP Agilent 8350 require a phase lock reference signal LO PHASELOCK OUT from the receiver and do not require the timebases to be connected Refer to the HP Agilent 85310A Operating and Service Manual or HP Agilent 85301B Operating and Service Manual for more information Receiver The receiver s primary task is to take the 20 MHz IF signals from the LO IF unit and convert them into digital data The data is processed by the receiver and displayed The receiver also controls the frequencies produced by the RF and LO sources This is done by means of the receiver s dedicated GPIB bus called the System Bus This bus is separate from the GPIB bus and it s sole purpose is to allow the receiver to control slave instruments Agilent Technologies 85325A Operating and Service Manual 5 5 Service Theory of Operation If the LO source is not synthesized HP Agilent 8350 then the receiver LO PHASELOCK OUT provides the phase lock signal This signal is input to the HP Agilent 8350 FM IN jack 5 6 Agilent Technologies 85325A Operating and Service Manual Service Recommended Test Equipment Recommended Test Equipment
61. quipment This test measures the input power at which the mixer exhibits 0 1 dB compression Each channel is tested over the test frequency range Data is taken at 51 frequency points First a power level is input to the test mixer that is within its normal operating range The input to reference mixer is set to a much lower level The test mixer output is ratioed to the reference mixer output and the data is put into memory The data is then normalized to give a 0 dB reference Next the input level is increased until the normalized data changes by 0 1 dB The test mixer power level is the 0 1 dB compression point Agilent Technologies 85325A Operating and Service Manual 4 9 System Performance Verification Setting Up The Equipment 4 10 Agilent Technologies 85325A Operating and Service Manual Service Service Introduction This chapter explains how to find and correct malfunctions in the millimeter wave system This chapter covers the following topics Theory of Operation Recommended Test Equipment Receiver Troubleshooting Replaceable Parts Adjustments Agilent Technologies 85325A Operating and Service Manual 5 1 Service Theory of Operation Theory of Operation A millimeter wave antenna measurement system which uses an HP Agilent 85309A frequency converter consists of a transmitter and receiver section Figure 5 1 shows the block diagram of the antenna measurement system
62. r During the warranty period Agilent Technologies will at its option either repair or replace products that prove to be defective Warranty service for products installed by Agilent Technologies and certain other products designated by Agilent Technologies will be performed at Buyer s facility at no charge within Agilent Technologies service travel areas Outside Agilent Technologies service travel areas warranty service will be performed at Buyer s facility only upon Agilent Technologies prior agreement and Buyer shall pay Agilent Technologies round trip travel expenses In all other areas products must be returned to a service facility designated by Agilent Technologies For products returned to Agilent Technologies for warranty service Buyer shall prepay shipping charges to Agilent Technologies and Agilent Technologies shall pay shipping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to Agilent Technologies from another country Agilent Technologies warrants that its software and firmware designated by Agilent Technologies for use with an instrument will execute its programming instructions when properly installed on that instrument Agilent Technologies does not warrant that the operation of the instrument or software or firmware will be uninterrupted or error free LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from
63. r to the system bus A typical system has a computer printer or plotter receiver and positioner controller connected to the main GPIB bus four devices The total GPIB cable length allowed in this example system is 2 x 4 8 meters Under no circumstances can the total cable length ever exceed 20 meters no matter how many devices are in the system If your system exceeds the allowed GPIB cable length you must use GPIB extenders There are usually two instruments connected to this bus the RF and the LO sources Calculate the system bus limitation separately using the same formula 2 meters device x 2 devices 4 meters allowable length Because the RF source is often far away from the receiver GPIB extenders are commonly used Always use the slow mode on extenders connected to the system bus Agilent Technologies 85325A Operating and Service Manual 5 3 Receiver Section Isolators Mixers Mixer Modules Service Theory of Operation Extender Recommendations If using high speed TURBO fast CW modes use fiber optic extenders for distances greater than 250 meters Using coax at distances over 250 meters greatly slows the whole GPIB bus This slows the data transfer to the system computer which results in slow measurements Always use Fast Mode on coax extenders connected to the main GPIB bus Always use Slow Mode on coax extenders connected to the HP Agilent 8530A local bus The receiver section cons
64. rce Module The mm source module and mixers can be repaired rather than replaced Contact your nearest Agilent service center for instructions on returning a unit for repair These items are not field serviceable 5 14 Agilent Technologies 85325A Operating and Service Manual Miscellaneous Parts Table 5 6 Service Replaceable Parts The following parts are supplied with each system Miscellaneous Parts Description HP Agilent Part Number Screws captive 1390 0765 Screws 1 2 inch 3030 0209 Screws 3 8 inch 3030 0221 Nut hex 4 40 2260 0002 Nut hex 4 40 2260 0009 RF cable SMA m m 1m 5061 5458 Wrench 1 4 inch 8710 0510 Wrench 3 16 inch 8720 0013 Torx driver T10 8710 1623 Modified wrench 5 16 08555 20097 Attenuator fixed 10 dB 3 5 mm HP Agilent 8493C opt 010 Operating and Service Manual 85325 90001 1 Only supplied with R band 2 This wrench is specially designed The closed end has been machined to be smaller and has been slotted so it will fit over a cable The modified end has another feature as well it slips when approximately 10 inch pounds of force is exerted on the SMA connection 10 inch pounds is the torque specification for all SMA connections inside the mm wave modules or inside the HP Agilent 85309A Adjustments Only the HP Agilent 85309A LO IF unit requires periodic circuitry adjustments Refer to the HP Agilent 85310A or HP Agilent 85
65. red by the HP Agilent 8510 or HP Agilent 8530 receiver The frequency range of your millimeter wave system depends on whether you are using an R Q U V or W band source module Agilent Technologies 85325A Operating and Service Manual 3 1 General Information Specifications Specifications About Specifications All millimeter bands are specified with HP Agilent 11970 harmonic mixers Sensitivity is defined as signal equals noise Averaging will improve sensitivity by 10 log x averaging factor Channel isolation is the coherent RF leakage from the reference mixer to the test mixer with inputs terminated To insure best system performance take care in connecting all waveguide flanges by securing all four screw points Appendix B explains how to connect waveguide connectors properly For specified performance of the mm wave source refer to documentation for the RF source module used Table 3 1 R Q and U Band System Level Specifications Agilent R85325A Agilent Q85325A Agilent U85325A R Band Q Band U Band Frequency Range GHz 26 5 to 40 GHz 33 to 40 GHz 40 to 50 GHz 40 to 48 GHz 48 to 60 GHz mm Wave Source Module HP Agilent 83554A HP Agilent 83555A HP Agilent 83556A Max Output Power dBm H 13 13 13 13 Sensitivity dBm 88 85 85 86 86 S N 1 with 0 averages Sensitivity dBm 109 106 106 107 107 S N 1 with 128 averages Dynamic Range dB 19 71 11 12 18 0 averages Compression L
66. rformed 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 instruments instruction manual for important information The laser radiation symbol is marked on products that have a laser output This symbol indicates thatthe instrument requires alternating current ac input 7 This symbol indicates hazardous voltages NI 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 A ZA Q 1SM1 A This text indicates that the instrument is an Industrial Scientific and Medical Group 1 Class A product CISPER 11 Clause 4 This symbol indicates that the power line switch is ON Q This symbol indicates that the power line switch is OFF or in STANDBY position Agilent 85325A Operating and Service Manual vii Safety Earth l 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 that the protection has been impaired the produ
67. t Non Banded 5 8 Baud Dependent Equipment 2 oo ones RR Rr ORG wend 5 9 Table 5 2 Recommended Test Equipment Banded 5 9 TroubloshaOUE oc caged vereede se acd eso s e Debo ed len es 5 10 Special 5716 Inch Wrench 2 344455 5h4e50049 RR eased wed xar 5 10 Replaceable Paris 25 2 e teed sew bene seg e bes cee esew ie wes 5 11 Ordering PIU esc conte eh eee pedea 5 11 Howto Order Pats occ ccks cenedddbonedacdaed EAQUE Re vad 5 11 MM Wave Module Pats iesu esu xd vasa Re ROC ned 5 12 Table 5 3 Test Module 85326 60001 Parts llus 5 12 Figure 5 2 Agilent 85326A 85326 60001 LL 5 12 Table 5 4 Reference Module 85326 60002 Parts 5 13 Figure 5 3 HP Agilent 85356A 85326 60002 L 5 13 Band Related Parts 22s esee ehem ha dikki 5 14 Table 5 5 Parts Supplied in Specific Bands lun 5 14 Repairing a Mixer or Source Module lssleseses 5 14 Nspelluneous PANS ped dee dac idk Tue Re REA RR EROR RC 5 15 ACUMEN MMC EMT 5 15 Table 5 6 Miscellaneous Parts on ke eee t 5 15 6 Using the HP Agilent 8340 41 in Your System Figure A 1 HP Agilent 8340 41 RF Source lesus A 1 7 Connecting the Waveguide Properly Hacdhnr and SIONE Lise sace wea e vA ener eee e do d B 1 Connecung Wavepulde 0 cc daca ead Seed dikaki h rE CEARN B 1 Precision FRNEGS Lusia eed Fed CE ROO eh EROR owes B 2 Figure B I Alignment Holes coeurs rre pR e a B 2 Alig
68. tch this value You do not need to connect the HP Agilent 85320B mixer to the system 2 Zero and calibrate the power meter 3 Determine the power sensor calibration factor at 4 GHz and set the power meter accordingly 4 Connect the power sensor to the LO output of the Agilent 85326A reference module refer to Figure 1 4 on page 1 11 Be sure to connect the power sensor to the end of the LO cable 1 Measure the power output of the reference module a If measured power is between 15 and 17 5 dBm no adjustment is necessary Go directly to the Adjusting LO Power to the Test Mixer section on page 1 15 b Ifthe measured level is outside of the above range you will have to change the LO power whenever you switch between HP Agilent 85320A B and Agilent 85325A mixer systems For HP Agilent 85320A B mixers refer to the HP Agilent 85320A B Mixer Modules User s Guide Since you must set the LO power separately for each type of mixer adjust the LO power for the millimeter wave mixers at this time To do this perform Procedure 1 starting at Adjusting LO Power to the Reference Mixer on page 1 12 2 Adjust the HP Agilent 85309A front panel LO POWER ADJUST control until the power meter reads between 17 and 17 8 dBm The LO POWER OUT OF RANGE light should be off 3 Note the reading of the HP Agilent 85309A display and write it down here HP Agilent 85326 85320 DETECTOR VOLTAGE SETTING millivolts If the LO POWER AD
69. to the appropriate power level for the millimeter system by referring to this setting To return to the original power level Turn the LO POWER ADJUST knob until the voltage reading matches the value written above To find the maximum unleveled power disconnect the detector voltage feedback cable at the reference module while monitoring the power level as shown in Figure 1 4 on page 1 11 Remember to perform the test within the frequency range of operation When performing the following step connect the LO IF and detector voltage cables to the reference MODULE first then connect cables to the mixer This lowers the risk of electrostatic damage to the mixers 3 Connect the reference mixer to the reference module and directional coupler refer to Figure 1 5 The warning beeper should now stop 4 Press ENTRY OFF to remove the error message from the receiver display 1 12 Agilent Technologies 85325A Operating and Service Manual Installation Adjustment Procedures B355xA DIRECTIONAL TOTTI COUPLER hina 30 DB E TERMINATION I 365A ees Q 11970 a REFERENCE MODULE IF MIXER LOAF 8349B L E g REFERENCE i x MODULE EN IF OUT REF IF IN 85 309A m lt a REF LO OUT TEST LO IF DETONI REF DETING l a LO INPUT E i REF IF TEST IF our OUT T To Receiver RE eer SOURCE E INTERFACE RF SOURCE LO SOURCE sess
70. ttenuator coax 0955 0321 D1 Directional coupler detector 0955 0568 J1 J2 3 Connector RF type N 08340 60221 J4 5 Connector 3 5 mm bulkhead 5062 6618 Wl Cable IF through 85325 20006 W2 Cable detector voltage 85325 60004 W3 Cable reformable 85325 20004 W4 Cable LO out 85325 20005 AT1 AT2 85326 60002 3dB configuration prisref cdr Figure 5 3 HP Agilent 85356A 85326 60002 Agilent Technologies 85325A Operating and Service Manual 5 13 Service Replaceable Parts Band Related Parts You receive a different directional coupler mm wave source module detector and isolator depending on the band of the system Table 5 5 Parts Supplied in Specific Bands Parts Supplied Parts Supplied Parts Supplied Parts Supplied Parts Supplied Description for R Bands for Q bands for U bands for V Bands for W Bands Directional coupler 00752 60025 0955 0617 0955 0618 00752 60024 HP Agilent W752D M source module HP Agilent HP Agilen HP Agilent HP Agilent HP Agilent 83555A 83555A 83556A 83557A 83558A ixer HP Agilent HP Agilent HP Agilent HP Agilent HP Agilent 119704 119700 119700 11970V 11970W solator 85325 60006 85325 60005 85325 60007 85325 60008 85325 60009 HP Agilent HP Agilent HP Agilent HP Agilent HP Agilent R 365A Q365A U365A V365A W 365A Waveguide straight 00899 60001 0955 0364 1 This item can be repaired 2 Must be equipped with option C01 Repairing a Mixer or Sou
71. vl dBm 19 24 21 24 21 at 0 1 dB Channel Isolation dB 100 100 100 100 100 reference to test Typical Match dB 15 5 15 5 15 5 15 5 15 5 1 the input of test and reference isolators 3 2 Agilent Technologies 85325A Operating and Service Manual Table 3 2 V and W Band System Level Specifications General Information Specifications Agilent V85325A Agilent W85325A Frequency Range GHz mm Wave Source Module Sensitivity dBm S N 1 with 0 averages Sensitivity dBm S N 1 with 128 averages Dynamic Range dB 0 averages Compression Lvl dBm at0 1 dB Channel Isolation dB reference to test Typical Match dB 50 75 GHz V Band HP Agilent 83557A 78 82 typical 99 103 typical 60 68 typical 18 100 9 5 1 Atthe input of test and reference isolators 75 110 GHz W Band HP Agilent 83558A 71 74 typical 92 95 typical 56 62 typical 15 100 9 5 Agilent Technologies 85325A Operating and Service Manual 3 3 Table 3 4 General Information MM Wave Source and Mixer Characteristics MM Wave Source and Mixer Characteristics The following tables identify the INPUT and OUTPUT characteristics of the HP Agilent 8355xA series millimeter wave sources and HP Agilent 11970x mixers Table 3 3 MM Wave Source Information MM Source Model Output Frequency MM Wave Output
72. ws Visually inspect a flange connection as follows 7 Place an electric light or white paper behind the connection 8 Check the flange matings for any gap A good connection has no gaps between the connected waveguide flanges and the waveguide walls are flush there is no step or offset 9 Make sure that all four screws are equally torqued Remember the most common cause of measurement error is a poor connection B 6 Agilent Technologies 85325A Operating and Service Manual Index A address HP IB 1 5 LO source 1 5 adjusting LO power for HP 85325A mixers 1 11 adjusting LO power to test mixer 1 15 adjustment HP 85309A LO IF unit 5 15 LO power to reference mixer 1 12 LO power to test mixer 1 13 mixer LO power 1 8 adjustment procedures 1 11 attenuation changing 1 9 attenuator placement diagram reference module 1 10 test module 1 10 B band dependant equipment 4 3 block diagram coupled reference 1 21 radiated reference 1 23 C cable lengths system bus 5 3 cable torque specifications 1 24 cables formulas for maximum lengths 3 7 length of LO cable from HP 853094 to reference module 1 9 Ls Lr Lt 3 6 calculating system bus cable lengths 5 3 changing attenuation 1 9 checking reference LO power 1 14 coax torque specifications 1 24 connector proper torque 4 6 proper torque specifications 1 24 connector care 2 2 D denom values see Table 1 2 1 6 description of product 3 1

85325A R/Q/U/V/W Millimeter Subsystem and 85326A Millimeter

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