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ML2430A Series Power Meter Maintenance Manual

1. de l Lov Figure 3 2 ML2430A Series Main PCB ML2430A MM 3 4 CALIBRATION DC REFERENCE 3 5 DC REFERENCE ML2430A MM To calibrate the DC Reference 1 Connect a sensor via 1 5m se
2. 3 5 calibrator frequency verification 2 7 level 2 13 sq odd Ro nog ege ce PR FCRC ve RR ew 1 2 charger battery 1 2 4 6 component handling 1 4 connectors careandhandling A 1 cover front 1 2 D data interpretation 2 5 diagnosticmode 2 6 DSP g Beak gee a S 4 2 E EPROM eR 344 5 1 firmware updates 5 1 frequency of calibrator 2 7 G ML2430A MM 1 1 GPIB 2 3 4 3 4 5 6 4 7 7 H handle sues ex Rs 1 2 4 3 h rmidity duoc Re eae 3 2 identification number 1 2 L level of calibrator 2 13 ee hc a SO ow he 2 5 linearly ow RO E ROR E oe 2 5 M mainPCB 3 2 3 4 4 3 6 2 7 5 imodels 3 duces ok RR 1 2 options power meter 221rkRXERAGUEA xS 1 2 P performance verification 2 1 power supply 4 4 4 6 7 4 PI 2 3 PADCE dess a de E e 4 3 4 5 R rack mount oai h ae 1 2 4 3 rangecalibator 1 2 2 1 range change error 2 5 relat
3. 1 2 SERVICE POLICY 4 0 ad ee ae bee Eee 1 3 SPARE PARTS LISTING c xa sede wed ke oi 1 3 COMPONENT HANDLING 4s ek RR RR ERR mom m 1 4 Chapter 2 Performance Verification 2 1 2 2 2 3 2 4 2 5 2 6 2 7 INTRODUCTION uum oed e made doe hA OUR mc Re OR 2 1 TEST CONDITIONS ce sd te eee ee RO Ron RO RO m ing 2 1 INPUT 204 O amp O m mo sm e 2 1 RANGE DATAINTERPRETATION 2 5 RANGE 5 5 2 6 CALIBRATOR FREQUENCY 2 7 CALIBRATOR POWERLEVEL 2 13 Chapter 3 Calibration Procedures 34 32 3 3 3 4 3 5 3 6 3 7 INTRODUCTION yr Oye RUE RE 3 1 REQUIRED TEST EQUIPMENT 3 234 o o 9 x ER 3 1 MEST CONDITIONS s mce oum ox RE homm Remo 3 2 PRE TEST SETUP i ge ud Rc we x a es 3 2 DC REFERENCE s acer aom amm ome E 3 5 CALIBRATOR FREQUENCY 3 6 CALIBRATOR POWER LEVEL cr i 44 e oem Rx 3 7 Chapter 4 Theory of Operation 4 1 42 43 4 4 4 5 4 6 4 7 4 8 4 9 ML2430A MM INTRODUCTION a a e doy mor 4 1 PRODUCT OVERVIEW DY oe we Ve 4 1
4. WARNING When supplying AC power to this equipment connect the accessory 3 pin power cord to 3 pin grounded power outlet If a grounded 3 pin outlet is not available use a conversion adapter and ground the green wire or connect the frame ground on the rear panel of the equipment to ground If power is supplied without grounding the equipment there isa risk of receiving a severe or fatal electric shock WARNING This equipment cannot be repaired by the operator DO NOT attempt to remove the equipment covers or to disassemble internal components Only qualified service technicians with a knowledge of electrical fire and shock hazards should service this equipment There are high voltage parts in this equipment presenting a risk of severe injury or fatal electric shock to untrained personnel addition there is a risk of damage to precision components WARNING If this equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired ML2430A MM Table of Contents Chapter 1 General Information 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 SCOPE OF THIS MANUAL soy fin ae RN ER 1 1 INTRODUCTION UR m 1 1 RELATED MANUALS ee 1 1 IDENTIFICATION NUMBER 1 2 MODELS OPTIONS AND 55 5
5. REAR PANEL CONNECTORS RF Reference Calibrator 4 11 REAR PANEL CONNECTORS Line Power Input External DC Input Ground Stud RS232 Port GPIB BNC 1 Ports Printer Port ML2430A MM The internal 50 MHz 0 dBm reference provides a high stability high accu racy level for signal channel calibration The output connector is a flange mounted female N type With the power sensor connected to the calibrator output a Zero Cal will automatically zero the signal channel and then per form 0 dBm calibration All measurements are then referenced to the 0 dBm level This section describes the ML 2430A Series Power Meter rear panel connectors The AC line power input module is mounted on the rear panel and the sup plied line power cable connects to it The module contains filtering elements to ensure immunity to external noise and reduce emissions The ML2430A Series Power Meter automatically senses the line level and internally config ures itself accordingly The specified line power requirement is 85 264V AC 50 440Hz An internally mounted 2A slow blow fuse provides fault protection Notethis fuse can NOT be changed by the operator An External DC jack connector is mounted on the main PCB and is accessed via a hole in the rear panel The specified External DC level is 12 to 424V Greater than 21V is required to charge the internal battery An internally mounted diode protects against reverse connection of the
6. 1414 9998x107 w 6 877x10 0 6877 CR ol 1000x10 1000 1000x105 w 1 000 x 10 1 0000 Combined Uncertainty uW 3 5809 Expanded Uncertainty K 2 2 mW 0 00716 Expanded Uncertainty 2 95 0 716 ML2430A MM 2 21 CALIBRATOR POWER LEVEL PERFORMANCE VERIFICATION 2 22 The standard uncertainty of each source of uncertainty in Table 2 1 is calcu lated as follows 0000004 10 compllne 3X comp 4xRxEExM 1 Mic 2 000003xv AM on 0000004 x 10 x T 4xRxEExM x 2 000003XV 0000004 107 x eme Va SN x V omp x x I EJ A amp Mx 4 Rx EExM 1 Rune 73 000006 R 0000002 1000 x EAN V V9 V I 4 Rx EE xM 1 U EE 2 ZN Vo V 4xRxEExM Mune x 1 1 0196 000 00000027 Combined Uncertainty aso V unc Vyunc CRE Expanded Uncertainty 2 2 x Combined Uncertainty x 1000 9596 level of confidence Expanded Uncertainty 22 determined from the above equations Now that you have Pmeas and Expanded Uncertainty K 2 you can calcu late lower and upper limits with the below equation Pu P meas P res X Expanded Uncertainty 2 LOWE mW PUN Upper mW The accuracy specification for the Reference Calibrator output power leve
7. 2 3 INPUT RANGE PERFORMANCE VERIFICATION ANRITSU Power Meter ML2438A s n 97310026 Range Calibrator Report Firmware 2 01 Date Time Operator Range Calibrator s n Range Input Input B Zeroed Zeroed Zero 84 790dB 86 864dB Range upper 6 990dB 6 990dB Range 1 lower 11 834dB 11 834dB Range 2 upper 11 834dB 11 834dB Range 2 lower 25 774dB 25 774dB Range 3 upper 25 860dB 25 860dB Range 3 lower 41 803dB 41 803 Range 4 upper 41 803 41 803dB Range 4 lower 57 812dB 57 812dB Range 5 upper 57 812dB 57 812dB Range 5 lower 61 732dB 61 732dB Figure 2 4 ExampleRange Calibrator Report 5 Toexit the Range Calibrator mode disconnect the sensor cables The Power Meter will reset to the default mode 2 4 ML2430A MM PERFORMANCE VERIFICATION RANGE DATA INTERPRETATION 2 4 RANGE DATA INTERPRETATION dB Error Figure Pass Fail Criteria Range Change Error ML2430A MM The tabular data presented by the Range Calibrator consist of the values read by the meter for each range with one measurement taken at each end of each range For each of these measurements there is an expected value These measured values must meet the specification limits defined in the ML2419A Range Calibrator Operation and Maintenance Manual 10585 00007 The Range Calibrator measures the Zero level and the U pper and Lower limits of each of the five ranges both channels on a dual channel meter To calculate
8. If the frequency is outside the 50 MHz 10 kHz limits then proceed to the Calibrator Frequency calibration procedure in Chapter 3 2 12 ML2430A MM PERFORMANCE VERIFICATION CALIBRATOR POWER LEVEL 2 7 CALIBRATOR The following procedure is used to measure the Calibrator output POWER LEVEL power level of the ML2430A Series Power Meter Equipment Required Agilent 432A Analog Power Meter Agilent 34420A Nano Volt Micro Ohm Meter or equivalent Agilent 8478B Power Sensor Procedure 1 Connect the Agilent 34420A to the Agilent 432A using the 4 wire cable provided with the Agilent 34420A 4 wire cable provided with the Agilent 34420A along with two BNC to binding posts adapters needed to connect the four wires to the rear of the 432A power meter Figure 2 14 34420A Volt Meer 4 Wire Cable ML2430A MM 2 13 CALIBRATOR POWER LEVEL PERFORMANCE VERIFICATION Connection shown to the Agilent 34420A volt meter Figure 2 15 34420A Volt Meter Connection shown to the rear of the 432A power meter Green Vrf White GND of Vrf Red V omp Black GND of Vcomp Figure 2 16 432A Powe Rear Pand 2 14 ML2430A MM PERFORMANCE VERIFICATION CALIBRATOR POWER LEVEL 2 Connect the Agilent Power Sensor 8478B to the Agilent 432A Power Me ter 432A Power Meter shown connected to the 8478B power sensor Figure 2 17 432A Power 3 Power on the 432A power meter a
9. CABLE SHIELD 5 Figure 5 1 Serial Interface Cable Example Diagram using Anritsu 800 365 Cable 5 4 Description Connector 1 pin 2 connected to pin 3 on connector 2 Connector 1 pin 3 connected to pin 2 on connector 2 Connector 1 pin 4 connected to pin 6 on connector 2 Connector 1 pin 5 connected to pin 5 on connector 2 Connector 1 pin 6 connected to pin 4 on connector 2 Connector 1 pin 7 connected to pin 8 on connector 2 Connector 1 pin 8 connected to pin 7 on connector 2 Connector 2 pin 5 connected to the cable shield ML2430A MM 6 1 INTRODUCTION CAUTION The procedures in this chapter should be per formed by qualified techni cal personnel only These procedures may require access to internal components and care should be taken to avoid contact with potentially hazardous voltages ML2430A MM Chapter 6 Troubleshooting It is strongly recommend that ML 2430A Series Power Meter repair be per formed by qualified technical personnel only The preferred ML2430A Series Power Meter service policy is the unit exchange program see section 1 6 page 1 3 This policy ensures minimum down time for the customer Only when the unit exchange method is not possible should the fault finding and repair work detailed below be used Refer to Chapter 1 section 1 7 page 1 3 for a listing of spare parts men tioned in this chapter Contact your nearest Anritsu Customer Service or Sales Center for price and availabi
10. and not damaged 3 Replacethe main PCB No GPIB communication When connected to a compatible GPIB controller no communication occurs 1 Reset the unit back to factory defaults and try again 2 Replacethe main PCB Incorrect operation of the rear panel BNC Inputs or Outputs One or more of the BNC connector fails to operate correctly 1 Visually inspect all of the BNC connectors If any physical damage is ob served replace the main PCB 2 If thereis no physical damage yet the BNC Inputs or Outputs do not work correctly replace the main PCB ML2430A MM TROUBLESHOOTING BATTERY 6 4 The following procedures refer to possible faults with the optional power me ter battery Fault Battery incorrectl y detected or not detected battery will not charge or bat tery operating time is too short The unit will not power up when battery is fitted The battery status is not correct for example the battery type is not shown When a fully discharged battery is installed it will not charge Recommended Action 1 ML2430A MM Confirm the battery being used has some charge by press the charge indi cator on the battery If no charge is shown replace the battery If the battery is charged and still the unit will not run when the battery is installed confirm that the battery contacts on the lower case are mated correctly with the PCB connector To do this remove the top cover and lift theleft hand corner o
11. be used on all ANRITSU equipment In addition there may be other labels attached to products that are not shown in the diagrams in this manual The following safety symbols are used inside or on the equipment near operation locations to provide information about safety items and op eration precautions Ensurethat you dearly understand the meanings of the symbols and take the necessary precautions BEFORE operating the equipment This symbol indicates a prohibited operation The prohibited operation is indicated symbolically in or near the barred circle operation is indicated symbolically in or near the cirde This symbol indicates warning or caution The contents are indicated symbolically in or near the triangle This symbol indicates a compulsory safety precaution The required This symbol indicates a note The contents are described in the box 5 r4 These symbols indicate that the marked part should be recycled 2430 MM SAFETY 1 N Repair SAFETY 2 For Safety WARNING Always refer to the operation manual when working near locations at which the alert mark shown on the left is attached If the operation etc is performed without heeding the advice in the operation manual thereis a risk of personal injury In addition the equipment performance may be reduced Moreover this alert mark is sometimes used with other marks and descriptions indicating other dangers
12. down and up softkeys to select the frequency factor to change The current selection is marked by the gt gt Press the CHANGE softkey Use the numeric keypad to enter the new cal factor value Select dB or as appropriate o A W Use the down and up softkeys to select the next cal factor to change or se lect the exit softkey if finished 7 Select the SAVE softkey to save the changes to the sensor EEPROM or select the DISCARD softkey to discard the changes and return to the Ser vice sensor menu Press the CANCEL softkey to return to the cal factor edit menu 8 3 GPIB SERVICE COMMANDS SERVICE MODE Printing the Pressing the more softkey again will bring up the PRINT A or PRINT B EEPROM Data softkeys Selecting one of these softkeys will print the first 2048 words of data from the selected sensor EEPROM to the currently selected attached printer 8 4 GPIB SERVICE The following GPIB service commands can be used to change or save factory COMMANDS cal factor data and to output the instrument serial number history CFFCHG Change factory cal factor values Syntax CFFCHG lt password gt lt sensor gt lt frequency gt suffix lt cal factor gt lt units gt password Password for the Service mode sensor edit control sensor A or B frequency A Factory table frequency entry suffix MHz or GHZ cal factor The new cal factor value for the factory frequency entry units or DB
13. intelligent and contains information on charge status The ML2430A Series Power Meter can operate for a maximum of nine hours on battery power with the battery fully charged to at least 9096 of maximum capacity The display backlight must be turned off to achieve this operating time The battery retains a charge and discharge history which ensures correct charging and discharging is performed This is vital to ensurethe maximum capadity and life of the battery is retained Theintelligent link also allows current battery status data to be available at the operators request The battery can be charged in the power meter in approximately two hours The charge control is accessed from a front panel menu The unit can not be operated whilethe unit is charging An external battery charger is available as an option if required When operating under battery power a battery charge indicator is displayed on the front panel LCD If the battery charge falls too low the unit will auto matically power down ML2430A MM BLOCK DIAGRAM p FRONT PANEL O 12C A 1 m REFERENCE GPIB RS232 OSCILLATOR ER p Inr THEORY OF OPERATION SIGNAL MAIN PROCESSING CORE CHANNEL CALIBRATOR DSP AD2181 CPU C165 PRECISION CALIBRATION REFERENCES CAL FACTOR FLASH Ric V GHZ INPUT MEMORY CONTROL px CHARGER NON VOLATILE BATTERY SENSORS C
14. 00001 3 Connect the personal computer serial COM port to the ML 2430A Series Power Meter back panel RS232 Serial Connector using the ANRITSU Se rial Interface cable ANRITSU PN B41323 or equivalent see section 5 4 4 Fitajumper ANRITSU PN 551 577 toJ 501 BOOT located tothe right of the power supply on the main PCB board This will forcethe Power Me ter intothe Bootload Mode when power is applied 5 Apply AC power tothe Power Meter 6 Goto Step 8 of the Running the Program instructions page 5 1 and load the program as described 7 Remove power from the meter and remove the jumper 8 Replacethe top cover taking care not to over tighten the captive screws 9 Replacethe battery if so equipped 5 3 SERIAL INTERFACE CABLE FIRMWARE UPDATES 5 4 SERIAL INTERFACE CABLE CONNECTOR 1 The 9 pin null modem serial interface cable necessary for upgrading the ML 2430A Series Power Meter firmware is available from the AN RITSU Customer Service department Order part number B41323 The cable can also be assembled from the following readily available components 2 meters of 8 conducor cable ANRITSU PN 800 365 2 each 9 pin female D connectors Assemble the cable according to the following connection diagram and description CONNECTOR 2 ORANGE 2 2 RED RED 3 3 ORANGE BROWN 4 4 YELLOW YELLOW 6 2 lt 6 BROWN BLUE 7 7 WHITE WHITE 8 8 BLUE GREEN 5 5 GREEN
15. AD CONTROL The SENSOR service mode is detailed in the following section of this chapter BOOTLOAD mode is covered in Chapter 5 the CONTROL mode is used in manufacturing and not required by service personnel 8 1 SENSOR SERVICE MODE SERVICE MODE 8 3 SENSOR Pressing the SENSOR softkey selection will bring up the Service sensor SERVICE MODE menu Service sensor menu Sensor A type MA2472A serial 970308 module NOTE A single channel meter ML2437A will only show the Sensor A information Sensor B type No sensor fitted serial module PASSWORD The example display above shows an ML 2438A dual channel meter with an MA2472A power sensor connected to input A and no sensor connected to in put B A single channel meter ML 2437 will only show the Sensor A information Entering the The sensor serial number and other parameters are protected by a password Password The default password is 1234 To enter the password 1 Select the PASSWORD softkey 2 Enter the current numeric password 3 Press the PASSWORD softkey again This will bring up the Service sensor menu with the EDIT A EDIT B and EDIT PASSWD options Pressing the more key will bring up the FACTOR A FACTOR B PRINT A and PRINT B options Service sensor menu Sensor A type serial module Sensor B type serial module EDITA EDITB EDITPASSWD more 8 2 ML2430A MM SERVICE MODE Changing the Password NOTE The pass
16. B Options 06 thru 09 are mutually exclusive 3000 mA h NiMH Battery Front Panel Cover Can not be used with rack mounted units External Battery Charger Item Hard Sided Transit Case Soft Sided Carry Case with shoulder strap Range Calibrator 50 MHz 0 dBm Reference Source Serial Interface Cable ML2430A MM GENERAL SERVICE POLICY INFORMATION 1 6 SERVICE POLICY The preferred ML 2430A Series Power Meter service policy is to exchange the complete unit This policy ensures minimum down time for the customer Unit Exchange The customer returns the power meter to the nearest Anritsu Customer Serv Policy ice Center and an identical meter is issued in exchange The original unit is repaired calibrated and returned to the customer whereupon the customer returns the exchange unit to the Anritsu Customer Service Center The origi nal power meter is returned with the same identification marks and serial number as it had before the repair Spares Kit Under circumstances where unit exchange is not possible a spares kit made Program up of major modular subassemblies is available from any Anritsu Sales Center 1 7 SPARE PARTS The following spare parts are available for the ML 2430A Series Power Meter LISTING Refer to Chapter 7 for Removal and Replacement procedures Contact your nearest Anritsu Customer Service or Sales Center for price and availability information Part Number Description ND41357 Power Suppl
17. B requires removal of the PSU The front and rear panels can re moved in concert with the main PCB and detached after the assembly is dear of the case Tools Required a Phillips screwdriver Removal Procedure 1 Removethe AC or DC power cord and the battery if fitted 2 Removethe top cover see Figure 3 1 page 3 3 3 Removethe PSU see section 7 3 4 Removethe Phillips screw and nylon washer that secures the main PCB to the bottom case Main PCB Mounting Screw Figure 7 4 Main PCB Mounting Screw 5 Carefully lift the main PCB with front and rear panels attached straight up and dear of the bottom case 6 Removethe front panel section 7 2 and rear panel section 7 5 as re quired ML2430A MM 7 5 REMOVAL AND REPLACEMENT Replacement Install the front panel section 7 2 and rear panel Section 7 5 to the Procedure main PCB 2 Carefully lift the assembly and position the front panel intothe case 3 Lower the main PCB onto the positioning pillars in the bottom case NOTE The battery spring connectors on the underside of the main PCB must mate correctly with the connectors in the bottom case Confirm that the battery connectors are cor rectly aligned by half lifting the front panel out on the left hand side of the bottom case Shine a light down intothe lower case and verify that the battery contacts fit intothe main PCB connectors Correct alignment is most easily achieved if t
18. GENERAL OPERATION 4 2 HUMAN INTERFACE EUR we 4 2 GPIB OPERATION p ko epe EE E RR 4 3 PRINTER ohms bee ec 4 3 CASE CONSTRUCTION ook mo mon m x RR 4 3 INTERNAL CONSTRUCTION 4 3 FRONT PANEL je Dei tede TRO ote DE RC ee 4 4 4 10 FRONT PANEL 5 4 4 411 REAR PANEL 5 4 5 412 POWER SUPPLY OPERATION 4 6 413 BATTERY OPERATION xem c AR ee ees 4 6 Chapter 5 Firmware Updates 5 1 INTRODUCTION zx xoxo 5 1 5 2 CODE 5 1 5 3 BOOTLOAD a a o a i o oe d 5 3 5 4 SERIAL INTERFACE CABLE 1 5 5 4 Chapter 6 Troubleshooting 6 1 INTRODUCTION s x scu E TOR eds 6 1 6 2 FRONT PANEG zuo RUE kde Rho UR d wep decals e a 6 2 6 3 REAR PANEL sexe o8 Ron c3 6 4 6 4 BATTERI ana Sag aay ett 6 5 6 5 GENERAL FAULTS x 4 am ion adpan a upa 6 6 Chapter 7 Re
19. ML2430A SERIES POWER METER MAINTENANCE MANUAL Anfritsu P N 10585 00003 REVISION E PRINTED April 2009 COPYRIGHT 1998 2009 ANRITSU CO 490 JARVIS DRIVE MORGAN HILL CA 95037 2809 WARRANTY The ANRITSU product s listed on the title page is are warranted against defects in materials and workmanship for one year from the date of shipment ANRITSU s obligation covers repairing or replacing products which prove to be defective during the warranty period Buyers shall prepay transportation charges for equipment returned to ANRITSU for warranty repairs Obligation is limited to the original purchaser ANRITSU is not liable for consequential damages LIMITATION OF WARRANTY The foregoing warranty does not apply to ANRITSU connectors that have failed due to normal wear Also the warranty does not apply to defects resulting from improper or inadequate maintenance by the Buyer unauthorized modification or misuse or operation outside of the environmental specifications of the product No other warranty is expressed or implied and the remedies provided herein are the Buyer s sole and exclusive remedies TRADEMARK ACKNOWLEDGMENTS V Connector and K Connector are registered trademarks of ANRITSU Company HP 437B HP 438A Deskjet and HP 340 Deskjet are registered trademarks of Hewlett Packard Company Adobe Acrobat and Acrobat Reader are trademarks of Adobe Systems Incorporated Microsoft Excel and Windows are trademar
20. Meter using 1 5m sensor ca bles The input s to be verified must be connected to the corresponding connector s on the Range Calibrator that is connect Power M eter con nector A to Range Calibrator connector A and connector B to connector B ML 2438 only 2 1 INPUT RANGE PERFORMANCE VERIFICATION 2 connection of the sensor cable s the meter automatically detects a Range Calibrator is present and displays the performance verification menus ANRITSU Range Calibrator more Figure 2 1 ML2419A Top Level Menu single channd 7 ANRITSU Range Calibrator A B Aand B more je c Figure 2 2 ML2419A Top Level Menu dual channa 3 The performance verification tests will begin when the soft key for the sensor input to be verified is selected For single channel power meters ML 24374 press the A soft key For dual channel models ML 24384 press A B or A and If the A and softkey is selected all measurements are first taken on sensor input A then repeated for sensor input B Performance verification tests for each sensor input are performed in the following sequence Q Thesignal channel input is zeroed Q The Power Meter signal channel s are checked at the up per and lower levels of each measurement range A null is performed at each range setting prior to every measure ment 2 2 ML2430A MM PERFORMANCE VERIFICATION INPUT RANGE ML2430A MM W
21. ONTROL INTERFACE FILTERS REAR PANEL NULLING INTERFACE DACs OUTPUT DAC SWITCH TEMPERATURE B SENSE VEN TRIGGER INTERFACE TTL trigger SWITCH ey CHANNEL 1 CHANNEL 2 1 SIGNAL CHANNEL SHOWN Coy OUTPUT K OUTPUT DUPLICATE FOR B Figure 4 1 ML2430A Series Power Meter Functional Block Diagram ML2430A MM 4 7 4 8 5 1 INTRODUCTION 5 2 CODE LOADER PROGRAM Installation Running the Program ML2430A MM Chapter 5 Firmware Updates The ML2430A Series Power Meters use a Flash EPROM to store the operat ing program New versions of the operating program can installed using a personal computer connected through the Power Meter serial interface Firmware updates are available on disk part number 2300 233 from your nearest ANRITSU Customer Service Center This chapter describes the use of the Code Loader Program and the configuration of the required RS232 cable The Power Meter Code Loader Program is a DOS based program used to transfer updated firmware into the Power Meter EPROM The Power M eter Code Loader program requires about 1 M b of hard drive space 1 Onthe personal computer hard drive create a directory to contain the Code Loader Program files 124304 for example 2 Copy the BOOT E XE file from the Code Loader Program floppy disk into this directory 3 From within the designated directory type l This will unzip the Code Loader Program fi
22. RATOR POWER LEVEL 11 On the ML243xA set the RF Calibrator to RF ON by pressing the left most soft key to change it from RF OFF toRF ON SENSOR R not fitted Figure 2 24 ML243xA Power M eter 12 Record the new number on the Agilent 34420A as V Volts 13 WhiletheRF is still ON press the DCV key on the 34420A and record this number as V omp Volts Figure 2 25 34420A Volt Meer ML2430A MM 2 19 CALIBRATOR POWER LEVEL PERFORMANCE VERIFICATION 14 Use the below equation to determine P the Reference Calibrator out put power in Watts Start by finding the Mismatch M then using this number along with V Vi R and EE to solve for comp 23V d Vi Vo V V7 Pres 4 Rx EE xM 1 2 sr xT y Where M 1 r Worst case value for M should be used in the P meas equation above Reflection coefficient of the 8478B sensor found in the 8478B calibration data Effective Efficiency of the 8478B sensor found in the 8478B calibration data Effective Efficiency uncertainty the 8478B sensor found in the 8478B calibration data needed for uncertainty calculation in Step 15 0 019 Reflection coefficient of the ML243XA Reference Calibrator output needed for uncertainty calculation in Step 15 R Mount Resistance of the 432A Power M eter Vcmp FromStep 13 above Vi From Step 12 above Vo From Step 10 ab
23. Remarks This command will change the cal factor value for a frequency entry in the factory cal factor table WARNING Cal factors once entered will be available for use by the DSP They will NOT be saved to the sensor though until the save command CFF SAV is executed If the sensor is changed or power is lost before saving then all changes since the last save will be lost CFFSAV Save the changed factory cal factor table Syntax CFFSAV lt password gt lt sensor gt password Password for the Service mode sensor edit control sensor AorB Remarks This command saves the changed factory cal factor table to the sensor EEPROM SERHIST Outputs the serial number history Syntax SERHIST Remarks This command returns the instrument serial number history data in a binary format 8 4 ML2430A MM SERVICE GPIB SERVICE COMMANDS Response SERHIST 3272 lt first ever serial number serial num bers gt All serial numbers are terminated with a null character and padded with OxF F to 16 characters All unused serial number positions are filled with OxF F The last valid serial number in the list is the current serial number ML2430A MM 8 5 8 6 1 2 INTRODUCTION CONNECTOR CARE AND HANDLING REFERENCE PLANE 1 REFERENCE PLANE Www DEPTH INCHES FEMALE PIN DEPTH INCHES MALE Figure A 2 N Connector Pin Depth Defi
24. Theory of Operation This chapter contains a general theory of operation and an operational block diagram for the ML 2430A Series Power Meter The ML2430A Series Power Meter is a light weight portable instrument featuring high accuracy and fast measurement speeds The large front panel LCD provides a simultaneous two channel readout with an available graphi cal display of pulse power measurements The ML2437A Power Meter features a single measurement channel The ML 2438A Power Meter adds an optional second measurement channel E ach channel has a linear amplifier chain coupled to a DSP Digital Signal Proces sor via an ADC Analogueto Digital Converter Each channel has a dynamic range of 420 to 70 dBm with one sensor Two types of sensors are available diode and thermal Diode sensors provide fast response speed and a wide dynamic range 20 dBm to 70 dBm for ex ample Thermal sensors provide high accuracy and stable averaged readings with a dynamic range of 20 dBm to 30 dBm high accuracy and stable 50 MHz reference is provided within the meter for conveni ent sensor calibration The optional rechargeable battery offers portable operation for up to nine hours Readout M ode Power measurement is displayed digitally in dBm dB milli watts dBuV dB micro Volts dBmV dB milli Volts or W Watts Resolu tion can be set to 1 2 or 3 decimal points Profile Mode Power level is plotted against time in a graphical
25. aces To clean the connector in terfaces use a dean cotton swab that has been dampened with denatured alcohol NOTE Most cotton swabs are too large to fit the smaller connector types n these cases it is necessary to peel off most of the cotton and then twist the remaining cotton tight Be sure that the remaining cotton does not get stuck in the connector Cotton swabs of the appro priate size can be purchased through a medi cal laboratory type supply center ML2430A MM APPENDIX CONNECTOR AND HANDLING The following are some important tips on cleaning connectors Useonly denatured alcohol as a cleaning sol vent Do not use excessive amounts of alcohol as pro longed drying of the connector may be required Never put lateral pressure on the center pin of the connector a If installed do not disturb the Teflon washer the center conductor pin Verify that no cotton or other foreign material remains in the connector after cleaning it a If available carefully use compressed air to re move foreign particles and to dry the connector a After deaning verify that the center pin has not been bent or damaged ML2430A MM A 3 A 4 Index A accessories power meter 1 2 Adobe 8 sda EH ee CR X 1 1 B battery 1 2 4 1 4 4 4 6 5 3 6 5 7 6 calibrate calibratorfrequengy 3 6 calibrator level 3 7
26. ator by pressing the Cal Zero key then the More soft key then press the RF Off soft key so RF ON is displayed 11 Now the ML243xA Calibrator output should be turned on and the MF 2412B frequency counter should be reading the frequency of the Calibrator output Record the frequency below F7 MHz ML2430A MM 2 11 CALIBRATOR FREQUENCY PERFORMANCE VERIFICATION Calibrator Frequency The sources of uncertainties of the frequency counter measurement at Uncertainty 50 MHz indude OneCount Least significant digits LSD of the frequency counter Time base accuracy from either of the following Q GPS Disciplined Oscillator Q MF2412B Frequency Counter Q Residual error of the frequency counter Normal M Measurement Frequency 1 x 10 Fast Mode Measurement Frequency 2 10 Use the following equation to determine the expanded measurement uncertainty U with coverage factor 2 95 level of confidence For the MF 2412B use the following numbers to determine U lcount 1 Time base accuracy for the MF 2412 7 5 x 10 with option 1 4 5x 10 with option 2 21 5 x 10 with option 3 Measurement Frequency F meas Frequency reading from the MF2412B in Hz Residual Error neas ERRRe 1 105 U 2x2 C97 y F meas x ERR 2 Verify the frequency of the calibrator F pe 4U is within the range of 50 MHz 10 kHz
27. below For all other measurement problems with Input A and B replacethe front panel assembly If replacing the front panel assembly does not fix the problem replace the main PCB assembly RF Calibrator The frequency or power level is out of specification or the RF level is not pres ent at all 1 If the RF Calibrator is ON yet no power is present at the Calibrator con nector replace the N type connector cable assembly from the main PCB to the front panel Calibratethe RF Reference and output power as per sections 3 10 and 3 11 page If calibration is not possible replace the main 6 3 6 3 REAR PANEL Fault Recommended Action Fault Recommended Action Fault Recommended Action Fault Recommended Action 6 4 TROUBLESHOOTING The following procedures refer to possible faults with the power meter rear panel The power meter does print When a compatible printer is connected and a print is started no printout is generated or an incorrect printout is made 1 Reset the unit back to factory default and try again 2 Replacethe main PCB The power meter will not load firmware It is not possible to load a firmware update or bootload firmware into the unit 1 Check that the PC configuration is correct for firmware transfer refer to Chapter 5 Firmware U pdates 2 Confirmthat the serial cableis correctly wired refer to Figure 5 1 page 5 4
28. ds 50 MHz 10 kHz NOTE If a metal adjustment tool is used it must be removed from the inductor core L 401 before reading the counter as the metal tool could affect the frequency 3 6 ML2430A MM CALIBRATION CALIBRATOR POWER LEVEL 3 7 CALIBRATOR The following procedure is used to adjust the Calibrator output power POWER LEVEL level of the ML2430A Series Power Meter Equipment Required Agilent 432A Analog Power Meter Agilent 34420A Nano Volt Micro Ohm M eter Agilent 8478B Power Sensor a Adjustment tool NOTE When making adjustments to the reference calibrator output power level make sure that the area wherethe following steps will be performed is ESD protected Procedure 1 Ifthe Reference Calibrator output power level is outside of the 1 mW 0 0015 mW limits adjust R409 recalculate Paua Upper and Lower with the new V V and Vam numbers using the same equations in the previous section comp 2 Continue doing the previous step until Upper and P aua Lower are both within specification NOTE If a metal adjustment tool is used it must be removed from the varistor R409 before reading the counter as the metal tool could affect the frequency Figure 3 4 R409 Adjustment ML2430A MM 3 7 3 8 4 1 INTRODUCTION 4 2 OVERVIEW Measurement Channels Sensors Internal 50 MHz Reference Battery Measurement Modes ML2430A MM Chapter 4
29. ed lt 1 1 RF reference 3 7 4 5 6 3 RS232 caos d 4 5 5 1 Index 1 Safety us x 1 1 1 2 Scope of the 1 1 sensor 1 handing lll sns A 1 serial cable orca 1 2 5 4 1 3 6 1 7 1 8 1 Spares a kw IR E 1 3 7 1 spreadsheet 2 5 T test 2 1 3 1 theory of operation 4 1 uncertainty 2 12 2 21 V verification calibrator frequency 2 7 calibrator level 2 13 calibrator menus 2 2 calibrator results 2 3 2 1 g n o PERDRE S 2 1 2 4 W Up e E 2 1 WARRANTY ceres 1 2 Index 2 ML2430A MM
30. ers are of a rugged molded plastic construction The top case has raised slots which align with the feet of the bottom case to allow unit stacking The front and rear panels are fitted into slots in the top and bottom cases The bottom case features a battery compartment with a cover plate se cured with two quarter turn fasteners The front panel assembly is made up of a conductive contact rubber key pad sandwiched between the molded plastic front panel and the LCD PCB assem bly Depending upon the option configuration selected the front panel may contain the signal channel input connectors and the RF calibrator reference output Connection to the main PCB is by ribbon cable The rear panel is made from sheet aluminum and contains the ground stud line power input module printer output connector RS232 1 connector GPIB connector four BNC 1 connectors and the external DC Input connector The rear panel is attached to the main PCB and fits into slots in the top and bottom cases An optional handle can be fitted using the two circular mounting points on each side of the unit A special top and bottom case are available to provide rack mounting capability The ML2430A Series Power Meter contains the main PCB the power supply unit and the battery compartment The main PCB is thicker than normally required in order to add strength to the unit construction The multi layer PC board is 95 surface mount with some components through hole
31. f any of the Range figures are outside of specification then proceed to the DC Reference calibration procedure in Chapter 3 25 RANGE CALIBRATOR DIAGNOSTICS PERFORMANCE VERIFICATION 2 5 RANGE CALIBRATOR DIAGNOSTICS 2 6 The Range Calibrator Diagnostics mode allows the user to investi gate meter problems by holding on any of the fixed level outputs to examine the results of a particular measurement From the top level menu press more and DIAGS When the Diagnostics option is selected the SENSOR LEVEL and ZERO soft keys become available Range Calibrator Diagnostics Sensor A Level Range 1 upper 6 990 SENSOR LEVEL ZERO exit Figure 2 5 Diagnostic ModeM enu SENSOR Toggles the display to show the measurements for each channel If only one channel is connected the SENSOR soft key shown in Figure 2 5 will not be displayed LEVEL Selects the level to be verified ZERO The selected sensor input is zeroed When a SENSOR and LEVEL are selected the range calibrator outputs the required signal to the appropriate sensor input on the meter and the meter continuously measures it The reading obtained for a particular range should be the same as when the full set of tests were run To obtain an accurate measurement it is important to ZERO at each selection of SENSOR and LEVEL ML2430A MM PERFORMANCE VERIFICATION CALIBRATOR FREQUENCY 2 6 CALIBRATOR The following procedure is used to measure the Calibrator ou
32. f the front panel up slightly Shine a bright light down into the case and verify that the contacts are mated correctl y If the battery status is not shown on the front panel display but the unit does operate with the battery there is a failure of the intelligent link to the battery Confirm that the battery contacts on the lower case are mated correctly with the PCB connector as described above If the battery case connections are correct and the battery is charged but theunit still does not operate correctly replace the PSU If the battery case connections are correct the battery is charged and the PSU has been replaced but the unit still does not operate correctly re placethe main PCB If a battery will not charge replace the battery PSU or main PCB in that order If the battery operating time is too short confirm that after charging the battery status indicates at least 8096 charged If not discharge the bat tery and recharge the battery fully five times If the battery does not re cover after this conditioning process replace it To extend battery opera tion time turn the backlight off during use 6 5 6 6 GENERAL FAULTS 6 5 GENERAL FAULTS Fault Recommended Action Fault Recommended Action 6 6 TROUBLESHOOTING The following procedures refer to general system faults The power meter loses non volatile memory The power meter loses all non volatile memory stored setups cal factors cal facto
33. ffective efficiency RF Cable with BNC male connection at one end and an N type male connection at other end Adjustment tools flat head and hex screwdrivers Ensure all test equipment is within its calibration period and is traceable to national standards An example of traceable national standards is NIST or through an internationally recognized accredited laboratory ML2430A MM 3 1 TEST CONDITIONS 3 3 TEST CONDITIONS 3 4 PRE TEST SETUP CAUTION Procedures in this and the following sections should be performed by qualified technical personnel only These procedures require access to internal test points and adjustment pots and care should be taken to avoid contact with potentially hazardous volt ages 3 2 The ML2430A Series Power Meter must be operated under controlled condi tions of temperature and humidity in order to meet its specified precision and stability All tests should ideally be performed at a temperature of 25 C 77 5 C and a relative humidity of less than 7596 non condensing Some of the procedures in this chapter require removal of the instrument s top cover to gain access to adjustment points With power disconnected open the unit by loosening the six captive screws on the underside see Figure 3 1 page 3 3 and separating the top half of the case from the base Ensure that the front and rear panels remain firmly in place duri
34. form This al lows measurement of power pulses with nanosecond pulse width resolution Triggering may be manual external or internal Display scaling is available with cursor measurement Power vs Time Mode Similar to Profile mode but with wider dynamic range 20 dBm to 70 dBm and longer time periods approximately 20 seconds Source Sweep Mode This feature allows the ML 2430A Series Power Meter to be synchronized to an RF source using the Horizontal ramp to Analog Input and Sequential Sync Digital Input 4 1 GENERAL OPERATION 4 3 GENERAL OPERATION Digital Signal Processor DSP Signal Channel 44 4 2 INTERFACE THEORY OF OPERATION Ratio When two channels are fitted a ratio of A B or B A can be made External DC Volts DC volts from 0 20V can be measured via a BNC connec tor on therear panel Resolution to mV level The ML2430A Series Power Meter operation is controlled by a Siemens 80C 165 16 bit RISC processor clocked at 20 MHz The operating program is stored in FLASH memory which can be updated through an 5232 serial link Static RAM memory is provided for storage of unit set up status when no power is applied A small lithium battery with a 10 year life span provides power to the RAM memory All unit functions including the front panel keys display power supply rear panel functions signal processing and battery op eration are coordinated by the main processor A dedicated p
35. he front mounting pillars are correctly en gaged first 4 Fully lower the PCB and ensurethat the it fits onto all six mounting pil lars and that the rear panel is correctly positioned The mounting pillars should be level with the top surface of the PCB 5 Install the mounting screw with nylon washer in the center of the PCB and torque to 27 CNm 2 39 in Ibs 6 Replacethe PSU see section 7 3 7 Replace the top cover see Figure 3 1 page 3 3 7 6 ML2430A MM REMOVAL AND REPLACEMENT REAR PANEL 7 5 REAR PANEL Tools Required Procedure ML2430A MM Removal of the ML2430A Series Power Meter rear panel first requires re moval of the PSU and the main PCB Therear panel can them be detached from the main PCB The ML2430A Series Power Meter rear panel removal instructions will vary depending upon the various connector options installed see section 1 5 page 1 2 Complete only those steps that apply to the specific unit under repair a Phillips screwdriver Slotted screwdriver 3 16 nut driver 9 16 deep socket 1 Removethe AC or DC power cord and the battery if fitted 2 Removethe top cover see Figure 3 1 page 3 3 3 Removethe PSU see section 7 3 4 Removethe main PCB with the front and rear panels attached secti on 7 4 5 Disconnect therear panel Sensor Input A flex cable from J 1 on the main PCB 6 Disconnect therear panel Sensor Input B flex cable from J 2 on the main PCB 7 D
36. hen all measurements have been performed on the selected inputs the results are presented on the screen and the following soft keys are dis played Range calibratorresults SensorA Range upper Range lower 1 6 996 11 822 11 822 25 771 25 864 41 808 41 806 57 814 57 805 5 61 727 SENSOR PRINT REPEAT exit Figure 2 3 ML2419A Verification Results Menu Example SENSOR Toggles the display to show the data for each sensor channel verified If only one channel has been verified the SENSOR soft key shown in Figure 2 3 will not be displayed PRINT The verification data can be printed using the PRINT selection The data is output through the ML2430A Series Power Meter rear panel printer port The printer parameters will be the same as those selected when operating the meter in stand alone mode Refer to the ML 2430A Series Power Meter Operation Manual 10585 00001 for information on print commands and sup ported printers See Figure 2 4 for an example of a printed Range Calibrator Report NOTE The results of the Range Calibrator tests are available from the power meter via the GPIB once the Range Calibrator is disconnected from the power meter Refer to the description of the RCD command in the ML2430A Series Power Meter Operation Manual Chapter 6 GPIB Operation REPEAT The last selected performance verification sequence is repeated exit Returns the user to the top level menu Figure 2 1 or 2 2
37. ions service policies and component handling precautions This manual is one of a two manual set consisting of this Maintenance Manual and the ML2430A Series Power M amp er Operation Manual ANRITSU part number 10585 00001 These manuals available as Adobe Acrobat pdf files from http www us anritsu com The files can be viewed using Acrobat Reader a freeware program provided from Adobe 1 1 IDENTIFICATION NUMBER 1 4 1 2 IDENTIFICATION NUMBER MODELS OPTIONS AND ACCESSORIES GENERAL INFORMATION The 2430A Series ID number is affixed to the rear panel Please use the complete ID number when ordering parts or corresponding with the ANRITSU Customer Service department The 2430A Series Power Meter is available with either one or two sensor inputs Model numbers options and accessories are listed bel ow Models Model No ML2437A ML2438A Options Model No ML2400A 01 ML2400A 03 ML2400A 05 ML2400A 06 ML2400A 07 ML2400A 08 ML2400A 09 ML2400A 11 ML2400A 12 ML2400A 13 Accessories Part No 760 206 D41310 ML2419A MA2418A B41323 Number of Sensor Channels Single Channel Dual Channel Option Rack Mount single unit Rack Mount side by side Front Bail Handle Options 01 thru 05 are mutually exclusive Rear Panel Mounted Input A Rear Panel Mounted Input A and Reference Rear Panel Mounted Inputs A B amp Reference Rear Panel Mounted Inputs A and
38. isconnect the rear panel RF Calibrator cable assembly from J 400 on the main PCB 8 Ontheinside of therear panel removethe front panel and AC input module ground wires green yellow from the ground stud 9 Removethe BNC connector nuts using the 9 16 deep socket 10 Remove the jack screws from the RS232 parallel printer and GPIB con nectors Retain all hardware for reuse 11 Remove the rear panel 12 Remove the AC input module if necessary Replacement is the opposite of removal 7 7 7 8 8 1 INTRODUCTION 8 2 AcckEssiNG SERVICE MODE ML2430A MM Chapter 8 Service Mode It is strongly recommend that ML2430A Series Power Meter service be per formed by qualified technical personnel only The preferred ML2430A Series Power Meter service policy is the unit exchange program see section 1 6 page 1 3 as this policy ensures minimum down time for the customer This chapter describes the use of the Service Mode menus and GPIB commands The service mode is accessed through the System front panel key using the following key press sequence 1 On the Power Meter front panel press System more more more 2 Press the blank softkey just to the left of the back softkey 3 Press the 0 key the numeric keypad 4 Press the blank softkey just to the left of the back softkey The service menu will be displayed as shown below Service menu service SENSOR BOOTLOAD firmware CONTROL SENSOR BOOTLO
39. ks of Microsoft Corporation NOTICE ANRITSU Company has prepared this manual for use by ANRITSU Company personnel and customers as a guide for the proper installation operation and maintenance of ANRITSU Company equipment and computer programs The drawings specifications and information contained herein are the property of ANRITSU Company and any unauthorized use or disclosure of these drawings specifications and information is prohibited they shall not be reproduced copied or used in whole or in part as the basis for manufacture or sale of the equipment or software programs without the prior written consent of ANRITSU Company Safety Symbols To prevent the risk of personal injury or loss related to equipment malfunction ANRITSU Company uses the following symbols to indi cate safety related information For your own safety please read this information carefully BEFORE operating the equi pment Symbols used in manuals DANGER Indicates a very dangerous procedure that could result in serious in jury or death if not performed properly WARNING Indicates a hazardous procedure that could result in serious injury or death if not performed properly CAUTION Indicates a hazardous procedure or danger that could result in light to severe injury or loss related to equipment malfunction if proper precautions are not taken Safety Symbols Used on Equipment and in Manuals Some or all of the following five symbols may or may not
40. l is 1 mW 20 012 mW mW per year The maximum permissible error for the power output level P aua should be within the range of 1 mW 30 0015 mW mW for example 0 9985 mW to 1 0015 mW If P aua is outside of the 1 mW 230 0015 mW mW limit then continue to the Calibrator Power Level calibration procedure in Chapter 3 ML2430A MM Chapter 3 Calibration Procedures 3 1 INTRODUCTION This chapter details the process of calibrating an ANRITSU ML2430A Series Power Meter This calibration entails adjusting the Reference Calibrator s 50 MHz output frequency and 1 mW output power level The Power Meter is warmed up for 15 minutes and adjustments are made to theinternal DC reference and the RF calibrator NOTE Procedures in this section should be performed by quali fied technical personnel only These procedures require cess to internal test points and adjustment potenti ometers and care should be taken to avoid contact with potentially hazardous voltages 3 2 REQUIRED The following test equipment is required to perform the procedures in this TEST EQUIPMENT chapter Anritsu MF2412B Frequency Counter Agilent 432A Analog Power Meter Agilent 34420A Nano Volt Micro Ohm Meter or equivalent Insurethat the Agilent 34420A Meter is warmed up for two hours prior to use Agilent 8478B Power Sensor The calibration data induding measurement uncertainty for the Agilent 8478B must be available to obtain the reflection coefficient and e
41. les into the above designated directory There will be seven files including the original BOOT EXE Theinstallation on the personal computer is now complete 1 Connect the personal computer serial COM port to the ML 2430A Series Power Meter back panel RS232 Serial Connector using the ANRITSU Se rial Interface cable PN B41323 or equivalent see section 5 4 2 Apply power to the Power Meter and allow it to complete the POST Power sensors need not be connected at this time 3 Onthe Power Meter front panel press System more more more 4 Press the blank softkey just to the left of the back softkey 5 Press the 0 key on the numeric keypad 6 Press the blank softkey just to the left the back softkey 5 1 CODE LOADER PROGRAM FIRMWARE UPDATES 7 Pressthe softkey labeled BOOT LOAD The LCD will display Please Wait 8 From a DOS prompt on the computer select the drive and directory CAUTION where the Code Loader Program was installed Disable Windows 9 Type Screen savers be fore attempting to BOOTLOAD n QUART FL run the code loader program Wheren is the PC COM port used usually 1 or 2 Notethe space be fore and after the COM port number The program will proceed to download the new operating system to the Power Meter The program takes about eight minutes to complete the update during which time the Power Meter LCD screen will be dark CAUTION When the down loading i
42. lity information See Chapter 7 for specific module removal and replacement instructions The procedures in this chapter suggest the most likely remedies in a logical order of severity It is best to follow the steps as presented in order to prop erly isolate the fault Refer to the ML2430A Series Power Meter Operation Manual 10585 00001 for the specific operating instructions referred to in these procedures 6 1 FRONT PANEL 6 2 FRONT PANEL 6 2 Fault Recommended Action Fault Recommended Action Fault Recommended Action TROUBLESHOOTING The following procedures refer to possible faults with the power meter front panel No measurement display When External DC or line power is applied no measurement display is seen 1 Pressthefront panel ON OFF key If theunit now starts up but did not when line power was applied replace the PSU 2 Ifthe unit has recently been reprogrammed remove the top cover see Figure 3 1 page 3 3 and confirm that the jumper at J 501 has been re moved If not remove the jumper and reapply power 3 Iftheunit still does not start up remove the top cover and measure the voltage on the PSU connector PL1 pins 15 to 14 Confirm a reading of 45 25V 160 mV If no voltage is present replace the PSU 4 Ifthe 45V is present reprogram the power meter using the bootload method described in section 5 3 page 5 3 5 ftheunit still fails to start replace the front pa
43. menus are driven by five main system keys Each one of these keys produces a soft key menu on the LCD which can be accessed by the four soft menu keys directly below the display On the left of the display is a key pad used to enter numeric data The power meter may be switched to stand by mode by the white ON OFF key in the bottom left corner of the front panel ML2430A MM GPIB OPERATION 4 5 GPIB OPERATION 4 6 PRINTER 4 7 CASE CONSTRUCTION Front Panel Rear Panel Handle and Rack Mount 4 8 INTERNAL CONSTRUCTION Main PCB ML2430A MM The ML2430A Series Power Meter GPIB operation is provided by a fully inte grated National Instruments TNT 4882 Most power meter front panel functions are available by GPIB command The Anritsu Power Meter offers five modes of GPIB operation ML24XXA Native mode HP 436A emulation mode HP 437B mode HP 438A mode and ML4803 mode GPIB is not available when the unit is battery powered due to the high power requirement of the GPIB IC The ML2430A Series Power Meter is equipped with a standard parallel printer interface Compatible printers include the HP 340 Deskjet and most other 300 and 500 Series HP Deskjet printers and the Canon BJ C80 Many desk top Centronics printers are also compatible Data print outs are avail able in all measurement modes The ML2430A Series Power Meter has a dam shell case structure The top and bottom cov
44. mounted One common PCB is used for the ML2438A dual channel and ML2437A single channel units For the ML2437A components are omitted from the PCB The board is mounted on six pillars in the bottom case and secured by one centrally located screw 4 3 FRONT PANEL Power Supply Battery Compartment 4 9 FRONT PANEL LCD System Keys Soft Keys Data Entry Key Pad ON OFF Key 4 10 FRONT PANEL 4 4 CONNECTORS Signal Channel Inputs THEORY OF OPERATION The power supply unit is mounted on top of the main PCB on four nylon standoffs Connection to the main PCB is by two 20 pin connectors Line power is fed through an input filter module mounted on the rear panel The heat sink of the PSU has thermal conductive material that contacts a heat spreader mounted on the underside of the top case In thelower case is a compartment where the optional battery is installed The compartment has an access panel secured by two quarter turn fasteners The battery connects to five contacts mounted in the lower case which in turn make contact with five spring connectors mounted on the underside of the main PCB The battery is firmly secured in the compartment by foam pads This section describes the ML 2430A Series Power Meter front panel func tional description The large front panel Liquid Crystal Display presents measurements and op erations menus Ninety percent of the top section of the display is for meas urement readout
45. moval and Replacement Procedures 7 1 INTRODUCTION s a a 7 1 7 2 FRONT PANEL p s e e ai 7 2 7 3 POWER SUPPLY ai s ox cem mo we Rom ce 7 4 7 4 MAIN POB ee Ee AG 7 5 7 5 REAR PANEL iol pl og eddie vx 7 7 Chapter 8 Service Mode 8 1 INTRODUCTION E Re te deckt Boe a ec s a 8 1 8 2 ACCESSING SERVICE MODE eh x 8 1 8 3 SENSOR SERVICE MODE 4 amp 4 sm EURO SR 8 2 8 4 GPIB SERVICE COMMANDS ori ened ae Bae Rok es 8 4 Appendix A Connector Care and Handling A 1 INTRODUCTION gt le aca SG Ae ER a A 1 A 2 CONNECTOR CARE AND HANDLING A 1 Index ii ML2430A MM 1 1 SCOPE OF THIS MANUAL Chapter 1 General Information This manual provides general information performance verification cali bration theory and service information for the Anritsu ML 2430A Series Power Meter The ML 2430A Series Power Meters are shown below Fig ure 1 1 Figure 1 1 ML2430A Series Power Meters 1 2 INTRODUCTION 1 3 RELATED MANUALS ML2430A MM This chapter provides information on other related manuals the unit identification number instrument opt
46. nd the 34420A voltmeter Allow the units to warm up for 15 minutes before taking any measurements ML2430A MM 2 15 CALIBRATOR POWER LEVEL PERFORMANCE VERIFICATION 4 Onthe front panel of the 432A power meter set the mount resistance to 200 Q yas 4 INGE 4 Figure 2 18 432A Power 5 Onthefront panel of the 432A power meter set the calibration factor to 100 Figure 2 19 432A Power 6 After the 432A and 34420A have warmed up for 15 minutes perform a zero of the 432A power meter according tothe instructions listed in the 432A user manual 2 16 ML2430A MM PERFORMANCE VERIFICATION CALIBRATOR POWER LEVEL 7 Onthefront panel of the 432A power meter set the Range to 0 dBm Figure 2 20 432A Power 8 OntheML243xA set the RF Calibrator to RF OFF This can be done by pressing the Cal Zero hard key then the More soft key and then verify the left most soft key shows RF OFF If it shows RF ON then press it once to show RF OFF Figure 2 21 ML243xA Power M eter ML2430A MM 2 17 CALIBRATOR POWER LEVEL PERFORMANCE VERIFICATION 9 Connect the 8478B power sensor to the ML 243xA Calibrator Figure 2 22 ML243xA and 432A Power M ers and 34420A Volt M eer 10 Select DCV 1 2 on the Agilent 34420A Record the number shown in the display of the 34420A as V Figure 2 23 34420A Volt Meer 2 18 ML2430A MM PERFORMANCE VERIFICATION CALIB
47. nel assembly 6 Iftheunit still fails to start replace the main PCB Front Panel display is working but the buttons are not working The front panel LCD operates normally during start up and displays a nor mal measurement display but one or all of the front panel buttons do not work 1 Reprogram the power meter using the bootl oad method described in sec tion 5 3 on page 5 3 2 Replacethe front panel assembly 3 Replacethe main PCB assembly Measurement problems with Input A or Input B Problems are encountered when calibrating zeroing or making power meas urements with the Power Meter on Input A or B 1 Remove the top cover and confirm the two flexible cables are correctly seated 1 2 on the right hand side of the main PCB Note that to re seat these connectors correctly the main PCB must be removed from the lower case 2 Confirm that the flexible cable has not become disconnected from the front panel Input A and B connectors ML2430A MM TROUBLESHOOTING Fault Recommended ML2430A MM Action FRONT PANEL If the display indicates Sensor A or B are not fitted when sensors are con nected to the front panel Inputs A or B replace the front panel assembly induding theflexible signal channel cable Connect the sensor to another 0 dBm 50 MHz source and verify proper operation If both inputs A and B perform a sensor zero but will not per form a 0 dBm calibration see Fault RF Calibrator
48. ng this operation Apply power to the unit using the AC inlet on the rear panel and verify that the meter has completed the Power On Self Test POST Prior to making any precision measurements allow the Power Meter to warm up for a period of 15 minutes from power on If the power supply is interrupted for any reason allow a similar settling period Refer tothe Main PCB drawing Figure 3 2 page 3 4 for the location of test points and components ML2430A MM CALIBRATION PRE TEST SETUP BATTERY COMPARTMENT LOOSEN THESE SCREWS LOOSEN THESE SCREWS Figure 3 1 ML2430A Series Top Cover Removal ML2430A MM 3 3 PRE TEST SETUP
49. nition ML2430A MM Appendix A Connector Care and Handling This appendix provides information on the proper care and handling of RF sensor connectors ANRITSU Power Meters are high quality precision laboratory devices and should receive the care and respect normally afforded such de vices Follow the precautions listed below when handling or connecting these devices Complying with these precautions will guarantee longer component life and less equipment downtime due to connector or de vice failure Also such compliance will ensure that Power Meter fail ures are not due to misuse or abuse two failure modes not covered under the ANRITSU warranty Beware of Based on RF components returned for repair de Destructive structive pin depth of mating connectors is the ma Pin Depth of cause of failure in the field When a RF Mating component connector is mated with a connector hav Connectors ing a destructive pin depth damage will usually oc cur to the RF component connector A destructive pin depth is one that is too long in respect to the ref erence plane of the connector Figure A The center pin of a precision RF component connec tor has a precision tolerance measured in mils 1 1000 inch The mating connectors of various RF components may not be precision types Conse quently the center pins of these devices may not have the proper depth The pin depth of DUT con nectors should be measured to assure compatibilit
50. nsor cable to input A 2 Connect the DVM between 113 and TP 1 45 000V 3 Enter the ML 2430A Service Mode by pressing the front panel keys as fol lows Press System Press more Press more Press more Press the blank soft key tothe left of the back soft key Press the number 0 on the numeric keypad Press the blank soft key tothe left of the back soft key Press CONTROL Press DSP CAL Press the number 1 key on the numeric keypad Press Enter o N o vu Adjust pot R94 for a reading of 5 000V 2 mV on the DVM 3 5 CALIBRATOR FREQUENCY CALIBRATION 3 6 CALIBRATOR The following procedure is used to adjust the Calibrator output frequency of FREQUENCY the ML 2430A Series Power Meter Equipment Required Anritsu MF2412B Frequency Counter RF Cable with BNC male connection at one end and an N type male connection at other end a Adjustment tool NOTE When making adjustments to the reference calibrator output frequency make sure that the area where the following steps will be performed is ESD protected Procedure If the 50 MHz calibrator output frequency is outside the 10 kHz limit proceed as follows 1 Power down and disconnect the AC power cord from the ML 243xA 2 Remove the six screws from the bottom of the ML 243xA and remove the top cover 3 Power the ML 243xA on and allow 15 minutes for it to warm up 4 Adjust the inductor core L401 so the frequency counter rea
51. ove Pmeas Calculated from the Pmeas equation above 15 After 15 determined the next step is to calculate the expanded uncer tainty with coverage factor 2 This is done by using the equations be low to get a value for the Expanded Uncertainty K 2 Table 2 1 following page shows an uncertainty calculation of an ML243xA Reference Calibrator Power Level The table shows the result ing expanded uncertainty and each source of uncertainty 2 20 ML2430A MM PERFORMANCE VERIFICATION Calibrator Power Level Uncertainty CALIBRATOR POWER LEVEL The formula for standard uncertainty is Standard Uncertainty X ne x Uncertaint y x Sensitivity C Divisor The divisor of each source of uncertainty is determined by the type of proba bility distribution of each uncertainty source The uncertainty equations of Vy Vy and are obtained from the Agilent 33420A multimeter s accuracy specifications for 1 year 23 5 as stated in the product s datasheet The uncertainties of Vy Vi and vary model to model of the multimeter used The uncertainty of Effective Efficiency is obtained from the thermistor mount 8478B calibration data The uncertainty of Mismatch M is obtained by taking twice the product of the reflection coef ficient of the 8478B r and the reflection coefficient of the ML243XA Refer ence Calibrator The uncertainty of connector repeatability CR is set to 0 196 for e
52. r tables etc when powered off for more than two minutes Confirm the jumper is fitted to J 500 on the two pins nearest the on board Lithium battery the RUN position as silkscreened on the PCB 2 Measurethe DC voltage of the Lithium battery mounted to the center of the main PCB This battery should measure 3 7V If the voltage is less than 3 5V replace the battery or the main PCB The buzzer does not sound The noise generator does not make any sound or the sound is too low 1 Resettheunit tothe factory defaults and try again 2 Replacethe main PCB ML2430A MM 7 1 INTRODUCTION CAUTION The procedures in this chapter should be per formed by qualified techni cal personnel only These procedures may require access to internal components and care should be taken to avoid contact with potentially hazardous voltages or damage from static electricity ML2430A MM Chapter 7 Removal and Replacement Procedures It is strongly recommend that ML 2430A Series Power Meter repair be per formed by qualified technical personnel only The preferred ML2430A Series Power Meter service policy is the unit exchange program see section 1 6 page 1 3 as this policy ensures minimum down time for the customer Only when the unit exchange method is not possible should the removal and re placement procedures described in this chapter be used Always verify the need for a component replacement using the troubleshoot ing g
53. rocessor is used to control all signal processing induding meas urement timing triggering sensor interface internal channel calibration ze roing averaging and communication to the main processor The DSP receives a digital output from the signal channel ADC via a direct link At power on the main processor downloads the DSP operating program which runs a self test and confirms all hardwareis operational There are two available signal channels is standard and the second op tional Both channels areindependent allowing ratio measurements The sen sor output is fed via a linear amplifier chain tothe internal ADCs There are five amplifier ranges the top two ranges are DC and the bottom three ranges are AC AC modulation chopping is used on the lower ranges to give meas urement stability and noise immunity The signal channel automatically changes range as the level being measured varies This range changing is transparent The ML2430A Series Power Meter front panel has a large LCD unit 240 els wide by 64 pixels high used to show measurement readouts and display Soft key menus The intensity of the display can be varied from just visible to blooming by a contrast control menu A display backlight is permanently on when using AC or external DC power Under battery power the backlight can be turned off to extend battery life The display can be configured to show a single channel or a dual channel readout The operations
54. s The bottom 1096is a singletext line for the menus The operation of the ML 2430A Series Power Meter is controlled by five sys tem keys Sensor Channel Trigger System and Cal Zero Each of these keys generates a soft key menu on the bottom line of the display The four soft keys either apply functions directly or access second or third level menus Each key is related tothe text displayed directly above it The data entry key pad features the numbers 0 through 9 decimal point and dear keys These keys are used to enter numeric data such as a sensor cal factor frequency The soft ON OFF key is used toturn the unit on from standby mode The switch is a software control switch which indicates to the PSU control cir cuitry what state the unit should be in The power meter is in standby mode when either AC line power or external DC is applied This section describes the ML 2430A Series Power Meter front panel connectors On standard model ML 2430A Series Power Meters the signal channel A and B input connectors are mounted on the front panel The connectors are 12 pin Hirose type A sensor cable provided with the meter is used to connect Anritsu power sensor tothe signal channel The connectors are snap push fit and require the outer body to be pulled to enable removal The A and B signal channel connectors may optionally be fitted on the rear panel refer to section 1 5 page 1 2 ML2430A MM
55. s complete the Power Meter will reboot and be ready Do not interrupt the for normal use down loading pro cess as corruption of the EPROM pro gram may result see section 5 3 11 Verify that the new firmware version was successfully installed by press ing 10 Disconnect the serial interface cable from the computer and the Power Meter System more more more Identity The new firmware version will be displayed on the front panel 5 2 ML2430A MM FIRMWARE UPDATES BOOTLOAD MODE 5 3 BOOTLOAD MODE CAUTION The procedure in this sec tion should be performed by qualified technical per sonnel only This proce dure requires access to in ternal components and care should be taken to avoid contact with poten tially hazardous voltages ML2430A MM If power is lost during programming or the Power M eter EPROM has been corrupted in some other way the Power Meter can be forced into a special bootload mode and reprogrammed Refer tothe Main PCB drawing Figure 3 2 page 3 4 for the location of test points and components 1 With AC power disconnected open the unit by loosening the six captive screws on the underside see Figure 3 1 page 3 3 and separating the top half of the case from the base Ensure that the front and rear panels re main firmly in place during this step 2 Remove the optional Ni Mh battery if so equipped Refer to the ML 2430A Series Power Meter Operation Manual PN 10585
56. sitive component ponent across any surface areas where the floor or work surface cover ing is capable of generating a static charge ATTENTION Static Sensitive Devices Handie Only at Static Safe Work Stations Reusable Container Do Not Destroy 4 Wear a static discharge wristband when 5 Label all static sensitive devices 6 Keep component leads shorted together working with static sensitive components whenever possible 7 Handle PCBs only by their edges Do not 8 Lift amp handle solid state devices by 9 Transport and store PCBs and static sensi handle by the edge connectors their bodies never by their leads tive devices in static shielded containers ADDITIONAL PRECAUTIONS Keep workspaces clean and free of any objects capable of holding or storing a static charge Connect soldering tools to an earth ground Use only special anti static suction or wick type desoldering tools 1 4 ML2430A MM 2 1 INTRODUCTION 2 2 TEST CONDITIONS 2 3 INPUT RANGE ML2430A MM Chapter 2 Performance Verification Performance of the Anritsu ML2430A Series Power Meter can be verified us ing the procedures in this chapter The equipment is intended for use as calibration instruments and as such must be operated under controlled conditions of temperature and humidity in order to meet its specified precision and stability All tests must be performed at a temperature of 25 C 77 F 10 C anda relative humidi
57. supply and a 3A slow blow fuse provides fault protection Damage may ocaur if the input volt age level exceeds 428V Note this fuse can NOT be changed by the operator A ground stud provides a ground for External DC operation or an additional ground connection A PC standard 9 D connector provides connection to the serial port The serial port can be used to update the power meter operating firmware and to control operation of the power meter from a PC or terminal The hardware handshake lines RTS and CTS are used to control the flow of data Serial con trol and data output commands are entered using the same format as the GPIB interface Standard General Purpose I nterface Bus connector used to connect through GPIB to other test equipment and a host computer The ML 2430A Series is compatible with I EEE 488 1 2 requirements Refer to the ML2430A Series Power Meter Operation Manual for information on using GPIB There are four BNC connectors mounted on the rear panel Two are multi funcion outputs and two are inputs A PC standard 25 pin D connector provides an interface to a standard paral lel printer Compatible printers indude the HP 340 Deskjet and most other 300 and 500 Series HP Deskjet printers and the Canon BJ C80 Many desk top Centronics printers are also compatible Full data print outs are available in all measurement modes 4 5 POWER SUPPLY OPERATION THEORY OF OPERATION 4 12 POWER SUPPLY OPERATION Auto Seq
58. the dB Error Figurefor each level subtract the expected level from the measured level The meter should be accepted as PASSED if it meets the following conditions applied the error figures calculated by the above method Note that the x cel spreadsheet form provided with the ML 2419A Range Calibrator can also be used to determine pass fail status Range 1 and Range 3 Absolute Error and Linearity The calculated absolute errors for Range 1 Upper and Range 3 U pper should each be lt 0 021 dBm The calculated absolute error for Range 1 Lower should differ from the Range 1 U pper error by lt 0 021 dBm Q The calculated absolute error for Range Lower should differ from the Range Upper error by lt 0 021 dBm Ranges 2 4 and 5 Linearity Q For Ranges 2 and 4 the absolute error calculated as above for the range Lower L evel should differ from that range s U pper L evel error by 0 021 dBm 0 For Range 5 the absolute error calculated as above for the range Lower L evel should differ from the U pper L evel by lt 0 033 dB The Range Change Error is defined as the difference between the errors for thetwo dB levels at the overlap between any two ranges The maximum Range Change Error between ranges is specified below Range 1 Lower Range 2 U pper 0 021 dB Range 2 Lower Range 3 U pper 0 021 dB Range 3 Lower Range 4 U pper 0 021 dB Range 4 Lower Range 5 U pper 0 046 dB a a I
59. tput frequency FREQUENCY of the ML 2430A Series Power Meter Equipment Required Anritsu MF2412B Frequency Counter or equivalent RF Cable with BNC male connection at one end and an N type male connection at other end Procedure 1 Power on the ML243xA and MF2412B Allow to warm up for 15 minutes before taking any measurements 2 On the MF 2412B press the Preset key T em Figure 2 6 MF2412B ML2430A MM 2 7 CALIBRATOR FREQUENCY PERFORMANCE VERIFICATION 3 On the MF2412B press the Input key also the number 0 key Figure 2 7 MF2412B 4 OntheMF2412B press the Left Arrow key to highlight Input CH area Figure 2 8 MF2412B 2 8 ML2430A MM PERFORMANCE VERIFICATION CALIBRATOR FREQUENCY 5 On the MF2412B press the Enter key until Input 2 is selected Figure 2 9 MF2412B 6 On the MF2412B press the Right Arrow key to highlight the Impd2 area Figure 2 10 MF2412B ML2430A MM 2 9 CALIBRATOR FREQUENCY PERFORMANCE VERIFICATION 7 On the MF2412B press the Enter key until 500 is selected Figure 2 11 MF2412B 8 On the MF2412B press the Return to Meas key Figure 2 12 MF2412B 2 10 ML2430A MM PERFORMANCE VERIFICATION CALIBRATOR FREQUENCY 9 Connect an RF cable from Input 2 of the MF 2412B to the Calibrator output of the ML243xA Figure 2 13 MF2412B and ML243xA 10 On the ML243xA turn on the RF calibr
60. tud Rear Panel Ground Stud Figure 7 2 Front Pane Ground Wire Connection to Rear Panel Ground Stud 8 Disconnect the green yellow ground wire from J 607 on the main PCB 9 Gently pull straight up on the front panel assembly and remove Take care to pull the ground wire free of the back panel and under the main PCB Replacement is the opposite of removal ML2430A MM 7 3 POWER SUPPLY 7 3 POWER SUPPLY Tools Required Procedure Blue Wire Brown Wire REMOVAL AND REPLACEMENT The PSU is mounted on top of the main PCB on four nylon standoffs Connec tion to the main PCB is by two 20 pin connectors a Phillips screwdriver 1 Removethe AC or DC power cord and the battery if fitted 2 Removethe top cover see Figure 3 1 page 3 3 3 Disconnect the BLUE and BROWN wires connecting the AC input mod uletothe PSU Figure 7 3 Power Supply Unit Connections 7 4 4 Removethe four Phillips screws nylon washers securing the PSU to the Main PCB 5 Gently lift up on the PSU to disengage the through board connector pins at PL1and PL2 Take care not to damage the pins 6 Anglethe PSU soas to pull it up and away from the rear panel and re move Replacement is the opposite of removal ML2430A MM REMOVAL AND REPLACEMENT MAIN PCB 7 4 MAIN PCB The main PCB is mounted on six pillars in the bottom case and secured by one centrally located screw Removal of the ML2430A Series Power M eter main PC
61. ty of less than 7596 at 40 C 104 F non condensing Prior to making any precision measurements allow the equipment to warm up for the manufactures specified time period at least 15 minutes from power on for the ML 24304 or as indicated in the procedures If the power supply is interrupted for any reason allow a similar settling period The Anritsu ML2419A Range Calibrator is required for this procedure as it provides a traceable series of voltages to facilitate accuracy measurements for the power meter signal channels The voltages are produced by means of a precision voltage reference and a series of switchable attenuators operated by a microcontroller All voltages produced are accurate stable and low noise such that errors inherent in the Range Calibrator itself do not contribute sig nificantly to the error measurements of the signal channel The Range Calibrator is controlled remotely using the power meter menu sys tem via the sensor cable s On connection of a sensor cable the meter auto matically senses the presence of the Range Calibrator From this point the Range Calibrator is controlled using the ML2430A keyboard and displayed menus The performance of the ANRITSU ML2430A Series Power Meter s individual signal channel inputs are verified using the following procedure References in this procedure to sensor input B apply to model ML 2438A dual channel power meters onl y 1 Connect the Range Calibrator to the Power
62. uencing Supply Priority On Off Control 4 13 BATTERY OPERATION Battery Operating Time Intelligent Operation Fast Charge Battery Life Indicator 4 6 This section describes the ML 2430A Series Power Meter power supply operation The power supply automatically determines what types of power are avail able and then configures itself to use the most suitable This sensing is fully automatic and requires no action by the operator If more than one type of power is connected and the one being used is interrupted the PSU will auto matically switch tothe next available power source Early power meters will reset and restart when switching from line or external DC to battery power If the power is restored the PSU automatically stops using the battery The power meter will operate from supplied power in the following order of priority AC line power external DC and battery power There are three ways to control the operation of the ML 2430A Series Power Meter To turn the power meter on or off Connect or remove the AC line power cord external DC power cord or the battery Usethe soft ON OFF key on the front panel of theunit Usetheline power switch fitted on the early model power meter rear panels This section describes the ML 2430A Series Power Meter battery operation The battery used in the ML2430A Series Power Meter is the 3000 mAh Du racell DR36S 3500 mAh Energizer NJ 1020 The battery is
63. uidelines presented in Chapter 6 Repair or replacement in the field toa level beyond the subassemblies listed in this chapter is not recommended Refer to Chapter 1 section 1 7 page 1 3 for a listing of spare parts men tioned in this chapter Contact your nearest Anritsu Customer Service or Sales Center for price and availability information 7 1 FRONT PANEL 7 2 FRONT PANEL Tools Required Procedure Display Panel Ribbon Cable RF Calibrator Connector J400 Sensor Input A Connector J1 Sensor Input B Connector J2 REMOVAL AND REPLACEMENT The ML2430A Series Power Meter front panel removal instructions will vary depending upon the various connector options installed see section 1 5 page 1 2 Complete only those steps that apply to the specific unit under repair a Phillips screwdriver 3 16 nut driver 1 Removethe AC or DC power cord and the battery if fitted 2 Removethe top cover see Figure 3 1 page 3 3 Disconnect the Display Panel ribbon cable from J 510 on the main PCB Disconnect the Sensor Input A flex cable from 1 the main PCB Disconnect the Sensor Input B flex cable from J 2 on the main o PR W Disconnect the RF Calibrator cable assembly from J 400 on the main Figure 7 1 Front Pand Connections 7 2 ML2430A MM REMOVAL AND REPLACEMENT FRONT PANEL 7 On the inside of the rear panel remove the front panel ground wire green yellow from the ground s
64. word will not be reset when a RESET or FACTORY reset is se lected from the front panel System menu or through the GPIB commands RST or FRST Sensor Serial Number Cal Factor Edit Menu ML2430A MM SENSOR SERVICE MODE To edit the password 1 Select EDIT PASSWD 2 Enter the old password and press Enter 3 Enter the new password 1 to 4 digits and press Enter 4 Enter the new password again to confirm and press Enter The CLR key on the numeric keypad will clear the current entry The Abort softkey will abort the password changing process and exit this menu To edit the sensor serial number 1 Select EDIT A or EDIT B if appropriate Enter the new sensor serial number using the front panel numeric keypad Press Delete to delete entries Enter to accept the new serial number or Can cel to quit without changing the sensor serial number When Enter is pressed to accept the new serial number a warning message is displayed to remind the user not to remove the sensor while the serial num ber is being saved I gnoring this message and removing the sensor while pro gramming could corrupt the sensor data Pressing the more softkey will bring up the FACTOR A or FACTOR B softkeys With this selection cal factors but not frequencies can be changed in the factory cal factor tables stored in the sensor EEPROM To edit the fac tory cal factor tables 1 Select the FACTOR A or FACTOR B softkey 2 Usethe
65. xample 60 dB for precision connectors The sensitivity C of each source of uncertainty except for connector repeat ability CR is the first partial derivative of the P e equation with respect to the uncertainty source variable The equation below shows how the sensitiv ity of V and Crom IS obtained comp iVcomp 2xVoomp x V Vo Vg M 2x M V 4xRxEExM 4xRxEExM d d dv P oss dV comp comp Taking the partial first derivative of P with respect to the variable uncer tainty source needs to be done to obtain sensitivity for the rest of the sources of uncertainty except for connector repeatability CR which has a sensitivity set to 0 001 W Table2 1 Uncertainty Calculation of an ML243XA Reference Calibrator Output Power L evel Standard Standard Uncertainty Readings Uncertainty Units Divisor Sensitivity Units Uncertainty Uncertainty W uW Vcomp 51627784 1 949x10 V 1732 1950x10 2 194 x 10 9 0 0219 Vo 0 0009813 1 2756x10 V 1732 1300x10 2068x10 2 0680 2 0 0784392 2756x107 1732 1 280x10 2 037 x 1076 2 0369 R 0 200 1400x10 1732 4996x10 4038x10 8 0 0404 99 36 1700x10 1 000 1 006x10 w 1 7009x10 9 17094 M 9989345 9728x107
66. y before attempting to mate them with Power Meter or sensor connectors An ANRITSU Pin Depth Gauge Figure A or equivalent can be used for this purpose A 1 CONNECTOR AND HANDLING APPENDIX A f the measured connector is out of tolerance in the region of the outer scale the center pin is too long see Table A 1 Mating under this condition will likely damage the precision RF component con nector If the test device connector measures out of tolerance in the region the center pin is too short This should not cause damage but it will re sult in a poor connection and a consequent degrada tion in performance Table 1 Allowable M ating Connector Pin Depth Test Port Pin Depth PH Depth Connector Type Inches Reading Figure A 3 Pin Depth Gauge N Male 0 207 0 000 0 207 0 000 0 003 0 003 K Male 40 000 K Female 0 002 Same as V Male 0 000 Fin epit V Female 0 002 Avoid Over Over torquing connectors may damage the connec Torquing tor center pin Finger tight is usually sufficient for Connectors Type N connectors Always use a connector torque wrench 8 inch pounds when tightening K or V type connectors N ever use pliers to tighten connec tors Cleaning The precise geometry that makes possible the RF Connectors component s high performance can easily be dis A 2 turbed by dirt and other contamination adhering to the connector interf
67. y Assembly w power switch ND41358 Top Case Assembly ND41359 Bottom Case Assembly ND41401 Rear Panel Assembly no power switch ND41474 Rear Panel Assembly no power switch rear mounted A B and Cal ND41402 Power Supply Assembly no power switch ND44172 Front Panel Assembly ML2438A ND45354 Main PCB Assembly ML2437A ND45361 Rear Panel Assembly w power switch ND45365 Main PCB Assembly ML2438A ND45368 Front Panel Assembly ML2437A ND41469 Battery Cover with fasteners B41294 Feet green as used before Feb 1998 B41411 Feet green as used after Feb 1998 B41319 Non slip Pad Foot Insert Black B41256 RF Calibrator Cable Assembly and N Connector Front Panel B41257 RF Calibrator Cable Assembly and N Connector Rear Panel 551 577 Two pin jumper for use during firmware boot loading ML2430A MM 1 3 COMPONENT HANDLING GENERAL INFORMATION 1 8 COMPONENT HANDLING ML 2430A Series contains components that can be damaged by static electricity The following figures illustrate the precautions that should be followed when handling static sensitive subassemblies and components If followed these precautions will minimize the possibili ties of static shock damage to these items NOTE Use of a grounded wrist strap when removing and or re placing subassemblies or parts is strongly recommended 1 Do not touch exposed contacts on any static 2 Do not slide static sensitive com 3 Do not handle static sensitive components in sen

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