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Summary of Contents for 8903E

Page 1: ...l service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE INSPECTION Remotely inspect equipment before purchasing with our interactive website at www instraview com LOOKING FOR MORE INFORMATION Visit us on the web at www artisantg com for more information on ...

Page 2: ... support your product This manual provides the best information we could find It may be incomplete or contain dated information and the scan quality may not be ideal If we find a better copy in the future we will add it to the Agilent website Support for Your Product Agilent no longer sells or supports this product You will find any other available product information on the Agilent Test Measureme...

Page 3: ...903E DistortionAnalyzer Operation and Calibration Manual a a e a e 0 e e a e 0 a e a e e 0 0 AgiIent TechnoIogies Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 4: ...out serial numbers see Instruments Covered by Manual in Section 1 First Edition HEWLET PACKARD COMPANY 1985 EAST 24001 MISSION AVENUE TAF C 34 SPOKANE WASHINGTON U S A 99220 Operation and Calibration Manual Part No 08903 90053 Operation and Calibration Manual Microfiche Part No 90069 Printed JULY 1985 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 5: ...1 Regulatory Information Updated March 1999 1 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 6: ...s power cord or supplied power cord set SAFETYSYMBOLS AIndicates instrument damage can occur if indicated operating limits are exceeded Indicates hazardous voltages Indicates earth ground terminal WARNING A WARNING note denotes a hazard It calls attentionto a procedure practice or the like which if not correctlyperformedor adhered to could result in personal injury Do not proceed beyond a WARNING ...

Page 7: ...ingto qualifiedpersonnel To prevent electrical shock do not remove covers Servicinginstructionsare for use by qualifiedpersonnel only To avoid electricalshock do not perform any servicingunlessyou are qualifiedto do so The opening of covers or removal of parts is likely to expose dangerousvoltages Disconnect the product from all voltage sources while it is being opened The power cord is connectedt...

Page 8: ...rature outsidethe cabinet must be less than the maximum operatingtemperature of the product by 4 C for every 100 watts dissipated in the cabinet If the total power dissipated in the cabinet is greater than 800 watts then forced convection must be used Product Markings CE the CE mark is a registered trademark of the European Community A CE mark accompanied by a year indicated the year the design wa...

Page 9: ...uct Do not proceed beyond a CAUTION sign until the indi cated conditions are fully understood and met Any interruption of the protective ground ing conductor inside or outside the instru ment or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury Ground ing one conductor of a two conductor outlet is not sufficient protection Whenever...

Page 10: ... tact separation of materials and normal motions of persons working with static sensitive devices When handling or servicing equipment containing static sensitive devices adequateprecautions must be taken toprevent device dam age or destruction Only those who are thoroughly familiar with industry accepted techniques for handling static sensitive devices should attempt to service circuitry with the...

Page 11: ...ion SINAD Signal Impurities 1 9 Page Section 2 INSTALLATION 2 1 2 1 Preparation for Use 2 1 Power Requirements 2 1 Line Voltage and Fuse Selection 2 1 Power Cables 2 1 HP IB Address Selection 2 2 Interconnections 2 4 Mating Connectors 2 4 Interface Connector 2 4 Coaxial Connectors 2 4 Operating Environment 2 4 Bench Operation 2 5 Rack Mounting 2 5 Storage and Shipment 2 5 Environment 2 5 Packaging...

Page 12: ...ding the Status Byte Message Sending the Status Bit Condition Receiving the Abort Message 3 27 HP IB Syntax and Characteristics Summary 3 29 Page DETAILED OPERATING INSTRUCTIONS 3 33 3 33 ion 3 35 Common Mode 3 36 DC Level 3 39 Default Conditions and Power up Detector Selection Display Level in Watts Distortion 3 43 3 45 Error Disable 3 47 Error Message Summary 3 48 Filters 3 51 3 55 nt 3 57 HP IB...

Page 13: ... 1 Related Adjustments 5 2 Internal Reference Frequency 5 3 ADJUSTMENTS 5 3 Input Flatness 5 4 Common Mode Rejection 5 8 Input DC Offset 5 9 400 Hz High Pass and Weighting Bandpass Filters 5 10 Notch Filter Tune and Balance 5 12 Voltmeter Using an HP IB 5 13 Voltmeter Not Requiring an HP IB 5 16 Controller Controller vii Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www...

Page 14: ...complete service manual the HP 89033 Service Supplement and the HP8903B Service Manual is supplied with the instrument order Copies of all volumes can be ordered through your nearest Hewlett Packard sales office The part num bers are listed on the title page of this manual Also listed on the title page of this manual below the manual part number is a microfiche part number This number may be used ...

Page 15: ...isplayed in V mV dBm into 600Q2 watts or as a ratio in ordB referenced to an entered or measured value Virtually all functions are remotely programmable through the Hewlett Packard Interface Bus HP IB Programming is easy and straightforward All meas urements are made through a single input This elimi nates the need to switch between multiple inputs under remote control and reduces software develop...

Page 16: ...is 8 ms reading 1 10 Systems The Distortion Analyzer features capabilities for gen eral systems applications The distortion measure ments are fully automatic programmable and fast The typical time to tune and return the first distortion measurement is 1 5 seconds with a measurement rate of 2 readingslsecond thereafter The residual distortion of the analyzer is typically 0 003 90 dB between 20Hz an...

Page 17: ... which combines both functions Order HP part number 5061 9683 1 14 HEWLETT PACKARD INTERFACE BUS HP 16 1 15 Compatibility The Distortion Analyzer is compatible with HP IB to the extent indicated by the following code SH1 AH1 T5 TEO L3 LEO SR1 RL1 PPO DC1 DT1 CO El The Distortion Analyzer interfaces with the bus via open collector TTL circuitry An explanation of the compatibility code can be found ...

Page 18: ... FRONT HANDLE COMBINATION KIT OPTION 907 FRONT HANDLE KIT OPTION 908 RACK FLANGE KIT NOTE Refer to ACCESSORIES SUPPLIED for more details Figure 1 2 HP Model 8903E Accessories Supplied and Options 907 908 and 909 1 5 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 19: ...ed for use in testing adjusting and servicing the Distortion Analyzer If any of the recommended equipment is unavailable instruments with equivalent minimum specifications may be substituted Table 1 3 also in cludes some alternate equipment listings 1 26 PRINCIPLES OF OPERATION FOR SIMPLIFIED BLOCK DIAGRAM The HP Model 89033 Distortion Analyzer combines two instruments into one a general purpose v...

Page 20: ...rtion level modes the frequency of the input signal is counted at the output of the internal plug in HP BP Filters When measuring SINAD distortion or distortion level the fundamental of the signal is removed by the Notch Filter The output from the filter is the distortion and noise of the signal In the ac level mode the Notch Filter is bypassed After amplifying and low pass filtering the output fr...

Page 21: ...ine if these parameters change with time or are stable and you can even make some quantitative measurements on it forexample peak level dc offset period risetime etc Many times however the pa rameter sought does not lend itself to easy visual analysis Thus the Distortion Analyzer was designed It combines into one instrument a series of general and specialized instruments under microprocessor contr...

Page 22: ...es or by running the active device into saturation or cutoff Often distortion can be reduced by reducing the signal level filtering or adding negative feedback According to Fourier mathematics the non linear terms in the circuit s transfer function give rise to harmonics of the signal Total harmonic distortion THD is usually defined as the ratio of the rms sum of the harmonics to the rms level of ...

Page 23: ...the harmonics of interest Sometimes it is desired to include hum and noise as part of the distortion measurement For this reason the measurement is often referred to as a THD N total harmonic distortion plus noise measurement 1 36 SINAD For most practical purposes the SINAD measurement as made by the Distortion Analyzer is equal to the reciprocal of the distortion measurement It is usually express...

Page 24: ...IN 2X SIN X 0 05 COS 2X SIN X AND 0 05 SIN 3X SIN X AND 0 05 COS 3X SIN X 0 05 SIN 3X SIN X 0 05 COS 3X Figure 1 4 Several Waveforms Each With 5 THD and the Signal Components Which Produced Them 1 11 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 25: ...B or 45 pV 65 dB or 45 pV 20 Hz to 100 kHz 0 001 to 100 21 dB e2 dB 50 rnV to 300V 99 99 to 0 dB 80 dB or 15 pV 70 dB or 45 pV 65 dB or 45 UV 300 0V 30 00V 3 000V 3000V 30 00 rnV 3 000 rnV 3000 mV 33 2 2 2 4 e4 300 0V 48 00V 16 00V 4 00V 33 e 1 O of reading e6 rnV Conditions 20 Hz to 20 kHz unfiltered or with low pass filters 20 kHz to 100 kHz 20 Hz to 20 kHz 80 kHz BW 20 Hz to 50 kHz 500 kHz BW 5...

Page 26: ...der response 18 dB octave or 60 dB decade 80 24 kHz 3rd order response 18 dB octave or 60 dB decade 400 240 Hz 7th order response 42 dB octave or 140 dB decade 20 2 dB 21 dB 2 dB 23 dB 0 1 dB 0 2 dB 20 4 dB 20 5 dB 1 0 dB 22 0 dB Conditions In ac level mode In distortion and SINAD modes Frequencies lo0 Hz Frequencies 4 0 0 Hz Distortion and SINAD modes only In ac level mode only CCllT Recommendati...

Page 27: ...dity At 1 kHz 60 Hz to 5 kHz X I R Recommendation 486 2 averaging responding meter 3olby Labs bulletin No 19 4 20 to 55OC 80 relative humidity At 6 3 kHz 6 3 kHz to 7 1 kHz 7 1 kHz to 10 kHz 200 H t to 6 3 kHz 31 5 Hz to 200 Hz 10 kHz to 20 kHz 20 kHz to 31 5 kHz IEC Recomendation 179 and ANSI 3 4 type 1 sound level meter 20 to 55OC 80 relative humidity At 1 kHz 20 Hz to 10 kHz 10 kHz to 20 kHz Fu...

Page 28: ... to reduce digit flickering with noisy signals Tuning notch filter is tuned to counted input frequency Time to Return First Measurement 1 5s typical Measurement Rate 2 0 readings s typical 3 dB Measurement Bandwidth 10 Hz to 500 kHz Detection true rms or rms calibrated average Displayed Resolution DISTORTION 0 0001 0 1 distortion 0 001YO 0 1YOto 3 distortion 0 01YO 3 to 30 distortion 0 1 10 30 o d...

Page 29: ...cy r l ppm Bandwidth 3 dB down 0 to 10 MHz Sensitivity 5 mV per division minimum Input Impedance 1 M Q Triggering Internal and External House Standard HP 1740A output to 215v HP 6215A Accuracy 50 1O O HP 0698 7497 AC Calibrator A C A T T P Audio Synthesizer Computing Controller DC Standard Digital Voltmeter Frequency Standard Oscilloscope Power Supply Resistor 100kQ Signature Analyzer Test Oscilla...

Page 30: ...X 15 2 required HP 08901 60084 HP 08901 60085 Foam Pad NOTE Conductive polyurethane foam 12 x 12 X 0 25 inches nonmagnetic HP 4208 0094 The performance tests adjustments and troubleshooting procedures are based on the assumption that the recommended test equipment is used Substituting alternate test equipment may require modification of some procedures 1 17 Artisan Technology Group Quality Instrum...

Page 31: ... greater than 66 Hz Leakage currents at these line settings may exceed 3 5 mA The Distortion Analyzer requires a power source of 100 120 220 or 240 Vac 5 to lo 48 to 66 Hz single phase or 100 120 Vac 5 to lo 48 to 440 Hz single phase Power consumption is 100 VA maximum This is a Safety Class I product that is provided with a protective earth terminal An uninterruptible safety earth ground must be ...

Page 32: ...p cover of the Distortion Analyzer must be removed a b Disconnect the line Mains power cable Remove any HP IB cables or connectors from the HP IB connector c Remove the Distortion Analyzer top cover 1 Remove the two plastic feet from the rear of the top cover by removing the panhead Pozi driv screw within each foot 2 Unscrew the Pozidriv screw at the center of the rear edge of the top cover This i...

Page 33: ...ica India unpolarized in many nations United States Canada Japan 1OOV or 200V Mexico Phillipines Taiwan I 125V Straight NEMA 15P 90 Straight NEMA5 15P Straight NEMA5 15P 90 Straight NEMA5 15P 80 80 36 80 80 36 Black Black Black Jade Gray Jade Gray Jade Gray fi Straight SEVl 011 Type 12 1959 24507 79 Gray Switzerland 250V Straight NEMA6 15P United States Canada 250v a n o I 220v Gray Gray Denmark I...

Page 34: ...tion e 0 1 1 0 0 L 12 13 0 1 1 0 1 M 0 1 1 1 0 N 1 4 Figure 2 3 The HP IB Address Switch Shown as Set by the Factory The Address Shown is 11100 in Binary with Both Talk Only and Listen Only Off Reinstall the top cover by reversing the procedure in step c above Connect the line Mains power cable to the Line Power Module and reconnect the HP IB cable to the HP IB connector h To confirm the setting r...

Page 35: ...re 55 C to 75 C Humidity 95 relative Altitude 15 300 meters 50 000 feet 2 15 Packaging Original Packaging Containers and materials identi cal to those used in factory packaging are available through Hewlett Packard offices If the instrument is being returned to Hewlett Packard for servicing please fill out one of the blue tags located at the end of this manual Include on the tag the type of servic...

Page 36: ... 0 Vdc to 0 4 Vdc and the false 0 state is 2 5 Vdc to 5 Vdc Programming and Output Data Format Refer to Section 3 Operation Mating Connector HP 1251 0293 Amphenol 57 30240 Mating Cables Available HP 10631A 1 meter 3 3 ft HP 10631B 2 meters 6 6 ft HP 10631C 4 meters 13 2 ft HP 10631D 0 5 meters 1 6 ft Cabling Restrictions 1 A Hewlett Packard Interface Bus system may contain no more than 2 meters 6 ...

Page 37: ...ted to it should be connected to a pro tective earth socket Any interruption of the protective earth grounding will cause a potential shock hazard that could result in personal injury In addition verify that a common ground exists between the unit under test and the Distortion Analyzer prior to energizing either unit For continued protection against fire haz ard replace the line fuse with a 250V t...

Page 38: ...e several other discussionsper tinent to the operating of the Distortion Analyzer to its fullest capabilities are contained in Section 1 of this manual Principles of Operation for a Simplified Block Diagram is a fundamental description of what the Distortion Analyzer is and how it works This information supplements the block diagrams given in the Detailed Operating Instructions and provides a basi...

Page 39: ... to 100 kHz 150 kHz AC Level Level O to 300V ac or dc Impedance 100 kQ except DC Level 101 kQ DC Level floating input can be selected AC LEVEL O to 300 Vac 20 Hz to 150 kHz Full range display from DC LEVEL 0to 300Vdc Fullrange display from 4 000V to 300 0V in four ranges SINAD 50 mV to 300V 20 Hz to 100 kHz Display range 0 to 99 99 dB DISTN 50 mV to 300V 20 Hz to 100 kHt Display range 99 99 to 0 d...

Page 40: ... PASS 30 kHz and 80 kHz filters reject high frequency noise 13 RIGHT MOST OPTIONAL PLUG IN FILTER key se lects the filter that is installed in the right most filter slot The C Message Weighting bandpass Filter Option 053 shown weights receiver testing accord ing to BSTM 41004 14 LEFT MOST OPTIONAL PLUG IN FILTER key selects the filter that is installed in the left most filter slot The CClR Weighti...

Page 41: ... LOW PASS 30 kHz filter press I 1 RATIO and LOG LIN RATIO To set the displayed measurement as the ratio reference press wno 0 LOG LIN To convert from linear to logarithmic or from logarithmic to linear measurement units press o Measurement I Mode 1 dBm into 600Q dBm into 600Q I AC LEVEL V or mV I I I I NOTE Duringpower up the Distortion Analyzer is initialized and set to automatic operation 3 5 Ar...

Page 42: ...play Level in Watts HP IB Error Disable 3 47 Hold Decimal Point HP IB controlled only 3 57 Hold Settings HP IB controlled only 3 58 HP IB Address 3 59 controlled only 3 61 HP IB controlled only 3 62 Notch Tune 3 67 HP IB controlled only 3 68 controlled only 3 75 controlled only 3 76 controlled only 3 80 controlled only 3 86 Input Level Range DC Level HP IB Input Level Range Except DC Level Post No...

Page 43: ...our numbers and letter comprise the prefix that denotes the in strument configuration The last five digits form the suffix that is unique to each instrument Line Power Module permits operation from 100 120 220 or 240 Vac The number visible in window indicates nominal tine voltage to which instrument must be connected see Fig ure 2 1 Center conductor is safety earth ground 1 3 7 Figure 3 2 Rear Pan...

Page 44: ...n mV In addition the measurement cycle annunciator in the upper left hand corner of the right display should be blinking and the AC LEVEL and LOW PASS 80 kHz keys should light 3 Connect the audio oscillator output to the INPUT of the Distortion Analyzer with a BNC to BNC cable Set the FLOAT switch to the ground position See Figure 3 3 4 Connect the oscilloscope to the MONITOR output See Figure 3 3...

Page 45: ...light should light Adjust the frequency but not the level of the audio oscillator to approximately 30 kHz until the right display reads 3 dB The left display should show between 26 and 34 kHz Press the LOW PASS 30 kHz key again to turn it off Set the audio oscillator to 100 kHz The right display should show between 1 and 1dB If the instrument has option 010 or 050 installed press 400 Hz HIGH PASS ...

Page 46: ...filters on the Distortion Analyzer off Press the LOW PASS 80 kHz key Press the DISTN key The DISTN key light should light Set the audio oscillator frequency to 1 kHz The right display should show 0 01 or less 16 SINAD Check 17 Press the S Shift SINAD keys The SINAD key light should light The right display should show 80 dB or more Press the Notch Tune key The NOTCH TUNE KEY light should light Set ...

Page 47: ...confirmed before attempting to service the instrument The select code of the controller s HP IB interface is assumed to be 7 The address of the Distortion Analyzer is assumed to be 28 its address as set at the factory This select code address combination that is 728 is not necessary for these checks to be valid However the program lines presented here would have to be modified for any other combin...

Page 48: ...Analyzer properly switches from local to remote control from remote to local control and whether the LCL key returns the instrument to local control This check assumes that the Distortion Analyzer is able to both handshake and recognize its own address Before beginning this check set the Distortion Analyzer s LINE switch to OFF then to ON Send the Remote message to the Distortion Analyzer rem 728 ...

Page 49: ... 00 HPL or 9009600000 BASIC Receiving the Data Message NOTE This check determines whether or not the Distortion Analyzer properly receives Data messages The Data messages sent also cause the 7 least significant HP IB data lines to be placed in both their true and false states This check assumes the Distortion Analyzer is able to handshake recognize its own address and properly make the remote loca...

Page 50: ...8 RESET 728 Check that both the Distortion Analyzer s REMOTE and ADDRESSED annunciators are on Press the Distortion Analyzer s LCL key Both its REMOTE and ADDRESSED annunciators should remain on Check that the Distortion Analyzer s REMOTE annunciator is off but its ADDRESSED annunciator is on This check determines whether or not the Distortion Analyzer properly responds to the Clear message This c...

Page 51: ...rtion Analyzer s REMOTE and ADDRESSED annunciators OPERATORS RESPONSE Check that the Distortion Analyzer s ADDRESSED annunciator is off Note that the BASIC ABORTIO statement sends both the Abort message and the Local message Thus if HPL is being used the Distortion Analyzer s REMOTE annunciator should remain on If BASIC is being used the Distortion Analyzer s REMOTE annunciator should turn off Sen...

Page 52: ...iving the Abort message Status Byte Message HPL BASIC rds 728 V STATUS 728 V dsp V PRINT V NOTE Send the Remote message This check determines whether or not the Distortion Analyzer sends the Status Byte message in both the local and remote modes This check assumes that the Distortion Analyzer is able to handshake recognize its own address and make the remote local changes Before beginning this che...

Page 53: ...f sufficient time is allowed Read the binary status o f the controller s HP IB interface and store the data in varia ble V in this step 7 is the interface s select code Display the value o f the SRQ bit in in this step 7 is the SRQ bit numbered from 0 HPL rem 7 wrt 728 22 4SP wait 2000 rds 7 V dsp SRQ bit 77V BASIC REMOTE 7 OUTPUT 728 22 4SP WAIT 2000 STATUS 7 V PRINT SRQ BIT V 7 OPERATORS RESPONS...

Page 54: ...riable V Display the value of V HPL rem 7 wrt 728 Tl trg 728 red 728 V dsp V REMOTE 7 OUTPUT 728 Tl TRIGGER 728 ENTER 728 V PRINT V OPERATORS RESPONSE Check that both the Distortion Analyzer s REMOTE and ADDRESSED annunciators are on The controller sdisplay should read 9009600000 00 HPL or 9009600000 BASIC OPERATOR S RESPONSE Check that the controller s run indicator is still on indicating that it...

Page 55: ...ot the Distortion Analyzer will respond to the Clear DCL Local Lockout Clear Lockout Set Local and Abort messages and in addition the Distortion Analyzer may issue the Require Service message Local to Remote Mode Changes The Distortion Analyzer switches to remote operation upon receipt of the Remote message The Remote message has two parts They are Remote enable bus control line REN set true Devic...

Page 56: ... all front panel keys except LCL are disabled and entries in progress are cleared REN RL1 Yes The Distortion Analyzer returns to local mode front panel control Responds equally to the GTL bus command and the front panel LCL key When entering local mode no in strument settings or functions are changed but entries in progress are cleared In local triggering is free run only GTL RL1 Yes Disables all ...

Page 57: ...Distortion Analyzer s LINE switch to OFF then back to ON However this technique has several disadvantages It defeats the purpose and advantages of local lockout that is the system control ler will lose control of a s y s t e m element There are several HP IB conditions that reset to default states at turn on 3 17 Data Messages The Distortion Analyzer communicates on the inter face bus primarily wi...

Page 58: ...codes Table 3 4 shows the Distortion Analyzer s response to various ASCII characters not used in its code set The characters in the upper table will be ignored Model 89033 unless they appear between two characters of a program code The characters in the lower table if received by the Distortion Analyzer will always cause Error 24 invalid HP IB code to be displayed and a Require Service message to ...

Page 59: ...ng local operation the Distortion Analyzer is allowed to free run outputting data to the display as each measurement is completed In remote three addi tional operating modes are allowed Hold Trigger Immediate and Trigger with Settling In addition the Clear Key Function can act as a manual trigger while the instrument is in remote The trigger modes and use of the Clear Key Function are described be...

Page 60: ...ot allow its measurement to be interrupted Indeed handshake of bus commands is inhibited until the measurement is complete Once the measurement is complete bus commands will be processed as discussed under Trig ger Immediate above with no loss of data Thus in an HP IB environment where many bus commands are present Trigger Immediate or Trigger with Set tling should be used for failsafe operation R...

Page 61: ... Table 3 5 Response to a Clear Message Parameter Operation Data Output Format DDDDDE NNCRLF Signed Mant r r L L Line Feed NOTE For the only exception to the above format refer to Rapid Frequency Count in the Detailed Operating Instructions When an error is output to the bus it follows the same twelve byteformat described above except most of the numeric digits have predetermined values as shown be...

Page 62: ... by disabling the Distortion Analyzer s front panel keys entirely using the Local Lockout message 3 24 Receiving the Local Lockout Message The Local Lockout message is the means by which the controller sends the Local Lockout LLO bus command If in remote the Distortion Analyzer re sponds to the Local Lockout Message by disabling the front panel LCL local key and the Clear Key Function In remote th...

Page 63: ...accordingto the enabled conditions describedabove under Sendingthe Require Service Message If one or more of the three condi tions described above are both enabled and present all the bits corresponding to the conditions and also bit 7 the RQS bit will be set true and the Require Service message is sent If one of the above condi tions occurs but has not been enabled by Special Function 22 neither ...

Page 64: ... UNTIL SRQ CAUSES INTERRUPT TO OTHER INSTRUMENT SERVICE ROUTINES INTERRUPT ON SRO T READ STATUS BYTE FROM 8903E SRQ FROM 8903E I 1 I TEST OTHER 8903E leNO 9 tntp DUE TO DATA SRQ CONDITIONS Y E S READ DATA I FROM 8903E I 4 Figure 3 4 Example Flow Chart for Driving the Distortion Analyzer Using the Require Service Message SRQ 3 28 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SO...

Page 65: ...rs Special Functions Log Lin Ratio Numeric Data Input Format Except in Rapid Source mode fDDDDDEkNN Exponent Magnitude Exponent Sign 5 DigitSigned Mantissa leadingdecimal not allowed Indicates Exponent Follows Output Formats Except in Rapid Frequency Count mode Data valid data output value always 4 X 109 and in fundamental units DDDDDE NNCRLF Signed M a n t i s s a rT I TTTLine Feed Exponent Sign ...

Page 66: ...ch is defined in Table 3 Program Code R1 RO LG LN TO T1 T2 T3 RL RR RF CL Model 89033 Program Code A0 A1 AU CL H O H1 H2 LG LN L O L1 L2 M1 M2 M3 N O N1 Table 3 7 Audio Analyzer HP IB Code to Parameter Summary Parameter 11 Program COG RMS Detector AVG Detector Automatic Operation Clear Key Function All Internal Plug in HP BP Filters off Left Plug in Filter on Right Plug in Filter on Log Linear All...

Page 67: ...P 6 0SP 6 1SP Special Function Error Disable All errors enabled Disabled Analyzer errors Errors 12 17 31 and 96 Disable External Source errors Error 19 Hold Settings Hold input level ranges post notch gain decimal point and notch tuning at present settings Re enter Ratio Mode Restore last RATIO reference Display RATIO reference Time Between Measurements Minimum time between Add 1s between measurem...

Page 68: ...8 59 60 61 62 63 Hexa decimal 00 01 02 03 04 05 06 07 08 09 OA OB oc OD O E O F 10 11 12 13 14 15 16 17 18 19 1A 1B 1c 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 28 2c 2D 2E 2F 3G 31 32 3 3 34 35 36 37 38 39 3A 38 3c 3D 3E 3F ASCII 0 A B C D E F G H I J K L M N 0 P R S T U v W X Y Z I a I A a b C d e f 9 h I k I m n I 0 P q r S t U v W X Y z i I DEL 01 000 000 01 000 001 01 000 010 01 000 011 01 00...

Page 69: ...el in linear units mV or V To obtain a display in dBm that is dI3 relative to 1 milliwatt into a 600 ohm load equivalent to dBre 0 775V press the LOG LIN key To return to linear simply press the LOG LIN key again If the ac level is to be displayed relative to a reference refer to Ratio and LOG LIN To measure the ac level of a signal at the INPUT connector LOCAL keystrokes Measurement7 AC iY progra...

Page 70: ...NPUT PROGRAMABLE PR GRAHAELE AMPLIFIER GAIN AMPLIFIER GAIN AMPLIFIER AC Level Measurement Block Diagram Comments The Distortion Analyzer powers up in the ac level measurement mode with the 80 kHz low pass filter activated The 80 kHz low pass filter reduces the measurement bandwidth from 750 kHz to 80 kHz Two ac level detectors are available true rms and average responding but rms calibrated See th...

Page 71: ...IB program code is entered the left and right displays blank the right display shows four dashes then both displays show the current measurement mode and input Comments The converse of the automatic operation mode is the Hold Settings Special prefixed9 Refer to Hold Settings For information on which specific Special Functions are turned off by the Automatic Operation mode refer to Special Function...

Page 72: ...UT connector when the FLOAT switch is in the FLOAT position Do not apply more than 300 Vrms either differential common mode or a combination to the INPUT connector s Common mode signal limitations exist because the instrument s ranging detector which determines the input voltage range is designed to read only the differentialsignal between the High and Low Inputs Thus the instrument can set an inc...

Page 73: ... Region For Valid Measurements graphs shown below indicate the maximum allowable common mode input voltages for a given differential input voltage Case 1 is for a single ended source with a common mode signal present on both input lines Case 2 is for a balanced source with common mode signals on both input lines To obtain the maximum common mode input voltage level from the graphs select the desir...

Page 74: ... 0 I L z w n 0 z 0 0 0 7 3 5 6V 300V VDIFF r m s D IOV DIFFERENTIAL INPUT VOLTAGE CASE 2 Balanced Source with Common Mode on Both Sides Related Sections AC Level DC Level 3 38 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 75: ... to linear simply press the LOG LIN again If the dc level is to be displayed relative to a reference level refer to RATIO and LOG LIN To measure the dc level at the INPUT connector Example Program Code Indications Measurement Technique Comments Related Sections When dc level is selected the LEDs within the DC LEVEL key and the S Shift key will light The right display shows the dc level with the ap...

Page 76: ...AC LEVEL DETECTOR RMS LP FILTER LOW PASS 80 kHz HPPeighting BP Filter Off RATIO Off Ratio Reference 0 LOG LIN LIN see RATIO and LOGILIN Detailed Operating Instruction Left Display Input Frequency Right Display Input AC Level Service Request Condition HP IB Code Error Only Trigger Mode Free Run Code TO Status Byte Cleared Special Functions All Special Functions off or in their zero suffix except Se...

Page 77: ... average detection or 5 3SP for slow average detection When 5 0SP or 5 1SP is entered the light in the AVG RMS key will go out if it is on When 5 2SP or 5 3SP is entered the light in the AVG RMS key will light indicating average detection has been selected When measuring complex waveforms or noise a true rms detector will provide a more accurate rms measurement than an average responding detector ...

Page 78: ...The load resistance in ohms must be an integer for example a resistance of 5 80 cannot be entered The decimal point has already been used when entering the Special Function An attempt to enter a second decimal point is ignored Remember that the instrument assumes that the input voltage is being developed across the specified external load resistance If an incorrect resistance is entered the readou...

Page 79: ...equency and distortion of the input signal are displayed and the appropriate annunciators are lighted see Description above In the distortion measurement mode the controller automatically sets the input attenuation and the gain settings of various amplifiers This is accomplished by measuring the input signal with the ranging rms detector This control ensures that the signal amplitude is within the...

Page 80: ...TECTOR StNtO INPUT AMPLIFIER u 1 I RANGING DETECTOR RMS u L Distortion Measurement Block Diagram Comments Distortion can be measured with either the true rms or average responding detector Most applications specify true rms detection Related Detector Selection Sections Distortion Level Filters Notch Tune RATIO and LOG LIN 3 44 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOUR...

Page 81: ...code for distortion level Indications When distortion level is selected the frequency and amplitude of the input signal are displayed and the appropriate annunciators and DISTN key light will light see Description above In the distortion level measurement mode the controller automatically sets the input attenua tion and the gain settings of various amplifiers This control ensures that the signal a...

Page 82: ...FT OISPLAY FREQUENCY FREQUENCY U RANGIN6 RWS DETECTOR 1 Distortion Level Measurement Block Diagram Related Sections Detector Selection Distortion Filters Monitor Notch tune RATIO and LOG LIN 3 46 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 83: ...is entered both displays will blank and the entered code will flash in the left display Both displays return to the display that is appropriate for the currently selected measurement mode Comments HP IB codes 8 1SP and 8 3SP perform the same function HP IBcode 8 2SP can be entered over the bus but is ignored The error messages can also be selectively disabled to prevent unwanted error interrupts t...

Page 84: ...ment Service Errors are discussed in the Service Section 8 of this manual HP IB Output The HP IB output format for errors is shown below 900DDE 05CRLF Fixed Data I J T L LLine Feed Fixed Exponent Format Error Code Carriage Return For example Error 10 is output to the HP IB as 90010E 05CRLF This format differs from normal data outputs since normal data outputs will never exceed 4 X 109 Once an erro...

Page 85: ...f the instrument the result of the calculation exceeds the display capabilities Enter new RATIOreference Referto RATIOand LOG LIN Adjust input frequency to within specified limits Refer to Table 1 1 This error code indicates that the input overload detector has tripped not in range hold This could be caused by too large an ac signal or too much ac on a dc signal NOTE Although error codes 17 and 19...

Page 86: ... This error code indication occurs when the input signal is changing too quickly for the Distortion Analyzer to make consistent measurements or when the common mode signal is too large for the Distortion Analyzer The I display indicates that the instrument is trying to make a measurement After nine unsuccessful tries Error 31 is displayed This error is sent on the HP IB when the I display is shown...

Page 87: ...ndpass or low pass filter off via HP IB use code H O or L O respectively or select the alternate filter in the pair To select the left high pass or bandpass filter and the 30 kHz low pass filter Indications Comments Program Program Code High Pass Bandpass Filter Code Low Pass Filter Both off 750 kHz low pass Low Pass 30 kHz Left High Pass or Bandpass Filter Right High Pass or Bandpass Filter H2 Lo...

Page 88: ...Hz The high pass or bandpass filters affect the signal being counted however the low pass filters do not Repeating the HP IB command to turn on a specific fdter has no effect that is the filters cannot be toggled on and off using the same HP IB command The individual filter characteristics are given in Table 1 1 Specifications and in Table 1 2 Supplemental Information The optional weighting bandpa...

Page 89: ... t5 0 5 10 15 20 25 30 35 40 45 50 55 10 FREOUENCY Hz CCIR and CCIRIARM Weighting Filter Plot m 0 W u z 0 n I n W a FREQUENCY HZ A Weighting and C Message Weighting Filter Plot 3 53 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 90: ...Related Sections Model 89033 Filters cont d High Pass Bandpass Low Pass AC Level Distortion Distortion Level SINAD 3 54 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 91: ...rom chassis ground In the single ended mode the FLOAT switch in the grounded position the outer conductor is connected directly to chassis ground The INPUT BNC connector allows the attachment of a shielded cable in the single ended mode which minimizes electromagneticinterference EMI This is important if the Distortion Analyzer is operated near a transmitter or in the presence of large RF signals ...

Page 92: ...und potential current will flow in the system common line Due to conductor resistance RC in the system common line the current causes a voltage drop This voltage drop a common mode voltage sums with the signal under measurement and can cause erroneous readings Grounding the system common line at a single point minimizes the effect of common mode voltages caused by ground loops Floating the Distort...

Page 93: ...e To hold the decimal point after the first digit of a mV Range D DDD mV Program Codes Indications Comments Related Sections program codes 4 7SP Code1 L Function For HP IB codes refer to Procedure above As the program code is entered both displays will blank and the entered code will flash in the left display The right display will show the amplitude with the decimal held in the position requested...

Page 94: ... following special functions through the HP IB bus l N Input Level Range Except DC Level 2 N Input Level Range DC Level Only 3 N Post Notch Gain 4 N Hold Decimal Point Right Display Only 6 1 Hold Notch Tuning For Special Functions 1 through 4 N is set equal to the currently selected value that the instrument is using for that function These values can be read by using the Special Special Display r...

Page 95: ...display the HP IB address in decimal Listen Decimal Address Equiva Char lent acter LOCAL keystrokes Assuming the same address the following will be displayed A list of the allowable addresses for the Distortion Analyzer is given below A5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 AddressSwitches A4 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 A3 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 A2 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 A1 0 1 0 ...

Page 96: ...ed To display the HP IB address via HP IB key in the appropriate HP IBprogram code as follows Display Format As the program code is entered it will appear on the left display When the HP IB code is entered the top row measurement key lights and annunciators will turn off If the 21 0 Special Function was entered the left display will show a binary number of the form AAAAA where AAAAA is the HP IB a...

Page 97: ...ash on the left display which then temporarily blanks out Note that for all measurement modes except dc level the left display will return to show the input signal frequency after the HP IB code is entered When the Distortion Analyzer powers up or when Automatic Operation is selected the input level range is placed in the automatic selection mode If the input level range is set such that the input...

Page 98: ...ure To set the input level range to a selected range or to re enter the automatic selection mode enter the corresponding HP IB program code Input Level Range Full Scale Program Code Automatic Selection 300V 189V 119v 75 4v 47 6V 30 0V 18 9V 11 9v 7 54v 4 76V 3 00V 1 89V 1 19v 0 754V 0 476V 0 300V 0 189V 0 119v 0 0754V 1 OSP 1 15p 1 25p 1 35p 1 45p 1 55p 1 65p 1 75p 1 85p 1 95p 1 1OSP 1 11SP 1 12SP...

Page 99: ... displayed For a complete listing of the error messages refer to Error Message Summary Manually selecting the gain of the input level circuitry can cause measurement error Measurement accuracy is not specified whenever the gain of the input level circuitry is manually selected because the selected gain setting may be less than optimum It is important to note that error messages indicating invalid ...

Page 100: ...s shown below The MONITOR output block diagram illustrates the signal path from the INPUT to the MONITOR output The diagram is that of a programmable gain amplifier with a tunable notch filter In ac level and dc level the notch filter is bypassed In SINAD distortion and distortion level the notch filter is switched into the signal path removing the fundamental frequency INPUT STAGE GAIN POST NOTCH...

Page 101: ...85 0 2512 0 3981 0 6310 1 00 1 58 2 51 3 98 6 31 10 00 15 85 25 12 39 81 I POST NOTCH GAIN I Special Special Display 3 N 3 1 3 2 3 3 3 4 The measurement system net gain equals the combined gain of the two stages To calculate the net gain use the following formulas Net Gain LOG Input Stage Gain LOG Post Notch Gain LOG or Net Gain LIN Input Stage Gain LIN X Post Notch Gain LIN In a c level the MONIT...

Page 102: ...n X Net Gain 100 Vout or For distortion level Vou Displayed Reading in volts X Net Gain or v 1ODisplayed Reading in dBm PO x Net Gain out For SINAD 100 Displayed Reading in x Vin X Net Gain v o u t or V 10 iDisplayed Reading in dB 1 20 x V x Net Gain out in In the above equations Voutis the MONITOR output level as measured with a true rms voltmeter and Vinis the input signal level The MONITOR outp...

Page 103: ...B program code 6 0SP or 6 1SP is entered the program code will flash on the left display The display blanks then shows the input signal frequency For HP IB program code 6 1SP the light within the NOTCH TUNE key will turn on The light will turn off for HP IB program code 6 0SP When the HP IB program codes N O or N1 are used there is no numeric code shown in the left display When the Distortion Anal...

Page 104: ...e mode program codes Code YT Function Program Codes For HP IB codes refer to the Procedure above Indications As the HP IB program code is entered it will flash on the left display with the display returning to show the input signal frequency When HP IBprogram code 5 2SP or 5 3SP is entered the LED within the AVG RMS key will light if not already on If the light is already on it will remain on When...

Page 105: ...is first powered up or when Automatic Operation is selected the Distortion Analyzer is placed in the automatic selection mode If the post notch gain is set such that the input signal level causes the post notch circuitry to be overdriven four dashes will be displayed on the right display If this overload condition is not corrected within nine measurement cycles Error 31 will be displayed Manually ...

Page 106: ... IB code for Rapid Frequency Count RF and then read the frequency data from the Distortion Analyzer The Distortion Analyzer does not send carnage return line feed or any other characters as delimiters The frequency data will be in the form shown below Procedure BYTE 1 BYTE 2 BBBB BBBB r BBBB BBBB I I I Jl 260 minus J number of Least significant clock Carries digit LSD of clock count Second least s...

Page 107: ...he Distortion Analyzer in the Rapid Frequency Count mode Steps 1 2 Establish a format suitable for reading four binary bytes from the Distortion Analyzer Take the readings and store the value in four r variables The value stored is the decimal equivalent of the binary word Shift various bytes around and weight their value by the proper amount in accordance with the routine given to obtain the numb...

Page 108: ...be taken in rapid sequence and stored in an array in the computing controller Then at a later time when operations do not require immediate controller attention the packed binary data can be converted into decimal frequency data This way the time required for the Distortion Analyzer to process the data into decimal frequency is eliminated This greatly increases its measurement speed for measuring ...

Page 109: ... to the previous measurement it is possible to re enter the ratio mode with the same factor as before using HP IB program code 11 0 Additionally the ratio reference can be displayed using HP IB program code 11 1 To use the RATIO key set the display to the desired reference value This can be done by adjusting the signal parameter being measured to a reference setting or by entering the numeric refe...

Page 110: ...upon the current value displayed entering either lOORl or 1R1 will cause an unscaled right display readout that is the numbers are correct but the decimal point may not be in the correct position However an extra digit of resolution is displayed for example if 1 58 was originally displayed the new display might indicate 1 576 Note that the units annunciator will change to and should be interpreted...

Page 111: ...ereturn line feed Bytes 9 and 10 Two digit exponent Byte 8 Sign of exponent or Byte 7 E exponent Bytes 2 6 DDDDD reading from display where Byte 6 correspondsto the least significant digit of the reading in the display Procedure To set the Distortion Analyzer to output data to the HP IB from either the left or right display enter the corresponding HP IB program code Display 1 Read Right 20 0SP orR...

Page 112: ...ted by the Distortion Analyzer or whenever a Controller Reset or Controller Clear Service Special Function is performed Automatic operation does not clear a Require Service message 1 2 4 Procedure To enable one or more conditions to cause the Distortion Analyzer to issue a Require Service message sum the weights of the conditions to be enabled from the table below This sum becomes the code suffix ...

Page 113: ...ion are set in the status byte and the SRQ control line on the HP IB will be set true The Distortion Analyzer s status byte is shown below for reference Comments For more information on HP IB operation serial polling and the Status Byte message refer to the HP IB discussiontitled HP IB Operationappearingearlier in Section 3 of this manual The HP IB Address Special Function provides a convenient me...

Page 114: ...robably be erroneous The following procedure will allow you to make stable SINAD measurements at any SINAD ratio Procedure First input a clean external source signal SINAD ratio greater than 20 dB with Notch Tune on automatic tuning NOTCH TUNE off Press S Shift SINAD This allows the Notch Filter to tune to the input frequency Freeze the notch filter by pressing the NOTCH TUNE key This locks the No...

Page 115: ...rogrammed gain and attenuation computes the ratio and displays the results in the appropriate units The frequency of the input signal is also measured and displayed COUNTER LEFT DISPLAY LFREQUENCY SINAD Measurement Block Diagram Comments During a SINAD measurement the output detector uses increased filtering to obtain more consistent readings in the presence of noise SINAD can be measured with eit...

Page 116: ...fixes 40 to 99 These are the Service Special Functions used to assist in troubleshooting an instrument fault The functions available are quite diverse special internal measurements software control and special service tests and configurations Most instrument safeguards are relinquished These Special Functions are discussed in detail in Section 8 If a Service Special Function is entered inadvertent...

Page 117: ...N N N N N N N N N N N N N N N Automatic Selection 300V range 64V range 16V range 4V range Y Y Y Y Input Level Range DC Level only 2 0SP 2 1SP 2 2SP 2 3SP 2 4SP N N N N Input Level Range DC Level only Post Notch Gain 3 0SP 3 1SP 3 2SP 3 3SP 3 4SP Automatic selection 0 dB gain 20 dB gain 40 dB gain 60 dB gain Y Y Y Y N N N N Post Notch Gain Hold Decimal Point right display only 4 0SP 4 1SP 4 2SP 4 3...

Page 118: ...ments 14 0 14 1 14 0SP 14 1SP Minimum time between measurements Add 1s between measurements Y Measurement _t SINAD SINAD Display Resolution 16 0 16 1 16 0SP 16 1SP 0 01 dB above 25 dB 0 5 dB below 25 dB 0 01 dB all ranges Y N l Display Level in T Display Level in Watts 19 0 19 NNN 19 OSP 19 NNNSP Display level as watts Display level as watts into 8Sl into NNNSl Y Y y I Read Display to HP IB 20 0 2...

Page 119: ... IB code SP The digit position noted beneath the displays corresponds to the special function prefix and the number displayed in that position corresponds to the special function suffix Special Special Display To determine the actual instrument settings of functions prefixed 1through 8 press the S Shift key and the NOTCH TUNE key once while Special Display is active or enter the HP IB code SS If t...

Page 120: ...ment settings are tabulated below SUFFIXES PREFIXES Code 1 17 2 1 3 4 4 6 5 0 6 1 8 1 1 2 3 4 5 6 7 8 Special Function Name Input Level Range Except DC Level Input Level Range DC Level only Post Notch Gain Hold Decimal Point Post Notch Detection Filtering Notch Tune Error Disable Actual Instrument Setting 0 189V range 300V range 60 dB Range DD DD mV range Fast RMS Detector Except in SINAD Hold not...

Page 121: ...yed the special function requested has not been executed Entry of invalid special function suffixes results in display of Error 23 For additional information on Direct Control Special Functions prefix 0 or Service Special Functions prefixes 40 to 99 refer to Section 8 Related Automatic Operation Sections Default Conditions and Power up Sequence Special Function Summary table under Description abov...

Page 122: ...o add or delete the one second time delay between measurements enter the corresponding HP IB program code Time Delay Between Measurements To set a one second time delay between measurements For HP IB codes refer to Procedure above As the program code is entered both displays will blank and the entered code will flash in the left display Both displays then return to the display that is appropriate ...

Page 123: ...n 1 of this manual Any equipment that satisfies the critical specifications in the table may be substituted for the recommended model s NOTE The perJormance tests arc ha 5t d on the asslimption that the rtx omrntwdcdk sf quip mcnf is used Siihstifitling altcmafc fesl cqiiipmcwf may reqirirr modgfication of sornc proccdirres 4 3 TEST RECORD Results of the performance tests may be tabulated on the T...

Page 124: ...rovides the most convenient method for setting level ranges However an alternate method not requiring a controller is also mentioned in the procedure Voltagcs iip f o 300 Vrms will be applied to fhcDistortion Analyzer s inpirf connmor EQUIPMENT AC Calibrator HP 754A and HP 746A Datron 4200 or Fluke 5200A and Fluke 5215A Audio Synthesizer HP 3336C Controller with HP IB HP 85B Opt 007 Dual Banana to...

Page 125: ...ild agree with the Special Firnction sigfjx of the controlkr command in the table For example the displayfor 1 2SPshoirld he 2 in posiiion I thepreceding digit hlank The displayfor 1 12SPshoirld he I with 2 in position I and I preceding it c Pre sAC LE VEL Compiite the ratio of fhe wading in the right display to ihe calibrator setfing The ratio shoiild he within the limits indicated in the tahk Co...

Page 126: ...0 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 Minimum 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 Ratio Limits Actual Maximum 102 102 102 104 104 102 102 102 102 102 102 104 104 102 102 102 102 102 102 104 104 102 102 ...

Page 127: ...mum 102 102 102 104 104 102 102 102 102 102 102 104 104 104 104 104 High Level Low Input AC Level Accuracy 4 On the Distortion Analyzer set the INPUT switch to FLOAT 5 Connect the equipment as shown in Figure 4 1 Note how the cable connects to the Distortion Analyzer s input through the two adapters The adapters reverse the outer and inner conductor connections to the cable 8903E DISTORTION ANALYZ...

Page 128: ...PUT 728 1 6SP 30R1 1 7SP 15R1 1 8SP 1OR1 1 9SP 7R1 1 1OSP 4 5R1 1 1 1SP 3R1 1 12SP 1 5R1 1 13SP 1R1 AC Calibrator Level Vrms 30 15 10 7 4 5 3 0 1 5 1 o Frequency Hz 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 Minimum 96 98 98 98 98 98 98 96 96 98 98 98...

Page 129: ... Low Level Low Input AC Level Accuracy 7 On the Distortion Analyzer press the LCL key and set RATIO off 8 Replace the ac calibrator with the audio synthesizer Leave the adapters as they are Set the audio 9 Set the audio synthesizer to the frequency indicated in the table below For each setting perform the a Press RATIO if it is on Set the audio synthesizer to 7 mVrms as read on the Distortion Anal...

Page 130: ... 03 and the corresponding reading of step 6 is 101 5 the computed result is Displayed Reading of Step b YO Minimum Limits of Computed Result YO Actual Maximum 4 81 5 21 4 81 5 21 4 81 5 21 4 81 5 21 5 03 x 101 5 5 11 o 100 Synthesizer Displayed Frequency Reading of H4 Step b YO 100 000 20 000 2 000 20 Limits of Computed Result YO Minimum Actual Maximum 4 81 5 21 4 81 5 21 4 81 5 21 4 81 5 21 4 8 A...

Page 131: ...plied to the ungrounded outer conductor DC Standard Voltage Vdc 300 30 3 0 4 0 04 Voitagcs rip to 300 Va c will be applitd to the DiftorfionAnalyztd inpuf connecfor DC Voltage Limits Vdc Minimum Actual Maximum 297 75 302 25 29 775 30 225 2 9775 3 0225 0 397 0 403 0 037 0 043 EQUIPMENT DC Standard HP 740B Datron 4000 or Fluke 893AR Low Input DC Level Accuracy 4 On the Distortion Analyzer set the IN...

Page 132: ... 397 0 403 2 9775 3 0225 29 775 30 225 DC STANDARD NOTE THE ORIENTATION OF THE QROUND TERYINAL QROUND INDICATOR 6 Set the dc standard to give the output voltage indicated below For each setting the right display on the Distortion Analyzer should read within the limits indicated 4 10 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 133: ... analyzer simultaneously If either instrument is out of specification a known good oscillator or analyzer can be substituted to determine which instrument is at fault EQUIPMENT Audio Oscillator HP 339A or HP 8903B PROCEDURE 1 Switch the Distortion Analyzer off then back on to initialize it Set the INPUT switch to ground Connect the output of the audio oscillator to the Distortion Analyzer s INPUT ...

Page 134: ...meter with a very flat frequency response then the level of the second oscillator is attenuated to obtain a precise ratio EQUIPMENT Audio Oscillator Low Distortion HP 339A or HP 8903B Audio Oscillator HP 3336C True RMS Voltmeter HP 3403C PROCEDURE 1 Switch the Distortion Analyzer OKthen back on to initialize it Set the Distortion Analyzer controls as follows INPUT switch ground MEASUREMENT DISTN L...

Page 135: ...put level as indicated d Set the low distortion oscillator level to 6V The display on the Distortion Analyzer should read cedure lator on the external voltmeter reading as in step a within the limits indicated Second Oscillator Frequency Hz 50 50 4 000 4 000 4 000 4 000 4 000 4 000 4 000 4 000 6 000 6 000 8 000 8 000 10 000 10 000 40 000 40 000 Atten dB 10 80 10 20 30 40 50 60 70 80 80 10 10 80 80...

Page 136: ...ON Characteristic FREQUENCY Measurement Range Accuracy Sensitivity Performance Limits 20 Hz to 150 kHz 20 Hz to 100 kHz f0 004 3tl digit 50 mV 5 mV Conditions AC level mode Distortion and SINAD modes Distortion and SINAD modes AC level mode DESCRIPTION The frequency of an audio synthesizer is measured at various levels with the Distortion Analyzer s counter EQUIPMENT Audio Synthesizer HP 3336C NOT...

Page 137: ...tions 20 to 55O 80 relative humidity 50 to 300 Hz 300 Hz to 3 kHz 800 Hz 3 to 3 5 kHz 3 5 to 5 kHz 20 to 55O 8O relative humidity 20 to 31 5 Hz 31 5 to 200 Hz 0 2to 6 3 kHz 6 3 kHt 6 3 to 7 1 kHz 7 1 to 10 kHz 10 to 20 kHz 20 to 31 5 kHz 20 to 55O 80 relative humidity 1 kHz 60 Hz to 5 kHz 20 to 55O 80 relative humidity 31 5 to 200 Hz 200 Hz to 6 3 kHz 6 3 kHz 6 3 to 7 1 kHz 7 1 to 10 kHz 10 to 20 ...

Page 138: ...nnect the HP IB controller to the Distortion Analyzer Key in and execute the following command OUTPUT 728 41 OSP LO to initialize the instrument and set the 80 kHz LOW PASS FILTER o f f 2 Set the Distortion Analyzer s INPUT switch to ground Connect the audio synthesizer to the Distortion Analyzer s INPUT Press the LCL key then set LOG LIN to LOG 3 Set the audio synthesizer s level to 2V into an op...

Page 139: ...cated below in the table appropriate for the installed weighting filter For each setting perform the following procedure a Set all filters o f f Set RATIO o f f b Set RATIO on Select the appropriate weighting filter The displayed ratio should be within the limits indicated Tahkfor CCITT Weighting Filter Option 011 or 051 Frequency Hz 50 100 200 300 500 800 1000 2000 3000 3500 5000 Ratio Limits d M...

Page 140: ... 000 6 300 7 100 8 000 9 000 10 000 12 500 1 4 000 16 000 20 000 3 1 500 Ratio Limits dB Minimum 30 9 24 9 20 8 14 3 8 3 2 4 0 5 5 1 8 5 10 0 11 2 12 1 11 8 11 0 9 7 7 7 1 o 6 3 1 2 7 23 2 44 7 22 9 1 8 8 1 3 3 7 3 1 4 0 5 6 1 9 5 11 0 12 2 12 3 12 2 11 8 10 5 8 5 1 o 4 3 1 0 7 21 2 40 7 4 18 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 141: ...000 2500 2800 3000 3300 3500 4000 4500 5000 Ratio Limits dB Minimum 56 7 43 5 26 0 17 5 1 2 4 8 5 5 7 3 7 2 5 1 6 0 1 1 2 1 5 2 0 2 3 2 3 2 4 2 9 3 5 6 2 8 6 15 5 22 5 29 5 Actual Maximum 54 7 41 5 24 0 15 5 1 0 4 6 5 3 7 1 7 0 5 0 4 0 1 0 8 0 5 0 0 0 3 0 3 0 4 0 9 1 5 4 2 6 6 13 5 20 5 27 5 4 19 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 142: ...7 100 8 000 9 000 10 000 12 500 14 000 16 000 20 000 31 500 Ratio Limits Minimum Actual 36 5 30 5 26 4 1 9 9 13 9 8 0 6 1 0 5 2 9 4 4 5 6 6 5 6 2 5 4 4 1 2 1 6 6 11 9 1 8 3 28 8 50 3 Maximum 34 5 28 5 24 4 1 8 9 12 9 7 0 5 1 0 5 3 9 5 4 6 6 6 7 6 6 6 2 4 9 2 9 4 6 9 9 1 6 3 26 8 46 3 4 20 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 143: ...0 16 000 Hz I Minimum 51 O 45 2 39 9 35 1 30 7 26 7 23 0 1 9 6 1 6 6 1 3 9 11 5 9 1 7 1 5 3 3 7 2 4 1 3 0 1 0 1 0 5 0 7 0 8 0 7 0 5 0 0 0 6 1 6 3 0 5 3 7 6 1 0 3 20 000 Actual Maximum 50 0 44 2 38 9 34 1 29 7 25 7 22 0 1 8 6 15 6 12 9 1 0 5 8 1 6 1 4 3 2 7 1 4 0 3 0 1 1 1 1 5 1 7 1 8 1 7 1 5 1 o 0 4 0 6 2 0 3 3 5 6 8 3 4 2 1 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE...

Page 144: ...apter HP 10110B Dual Banana to BNC Adapter HP 1251 2277 Resistor lOOkn HP 0698 7497 PROCEDURE 1 Switch the Distortion Analyzer off then back on to initialize it Set the INPUT switch to ground 2 Set the audio oscillator to 3 Vrms at 100 Hz Connect the audio oscillator s output to the Distortion Analyzer s INPUT Press RATIO 3 Insert the lOOkn resistor in series with the center conductor of the audio...

Page 145: ...nsert the lOOk0 resistor in series with the inner conductor of the audio oscillator s output The right display should read between 49 90 and 50 40 if the audio oscillator has 6000 output impedance or between 49 00 and 51 00 if the audio oscillator has 500 output impedance Display with 6000 Impedance 49 90 50 40 51 OO o Display with 500 Impedance 49 00 4 23 Artisan Technology Group Quality Instrume...

Page 146: ...ranges EQUIPMENT Audio Oscillator HP 8903B or HP 3336C Controller with HP IB HP 85B Opt 007 Dual Banana to BNC Adapter HP lOllOB 8903E DISTORTION ANALYZER I i I 1 OUTPUT AUDIO OSCILLATOR AUDIO CABLE 8903E INPUT SOURCE BNC CONNECTOR OUTPUT i STANDARD BNC MALE GROUND BRA IOED TERMINAL BIND I NG OUTER POST CONDUCTOR Figiirti 4 5 Common Mode Rqiection Ratio Tcw St icp PROCEDURE NOTE The Distortion Ana...

Page 147: ... The output impedance of the oscillator should be 600n 3 Connect the equipment as shown in Figure 4 5 Note the use of the dual banana to BNC adapters to tie the inner and outer conductors of the input connector together NOTE cables in place of the stripped RF coaxial cahltp dt siripd the connections can also he ma using a variely of adapkrs and jiimper 4 25 Artisan Technology Group Quality Instrum...

Page 148: ...000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 Minimum 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 Results Actual Maximum 102 102 102 104 104 102 102 1...

Page 149: ...0 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 Minimum 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 Results Actual Maximum 102 102 102 104 104 102 102 102 102 102 102 104 104 ...

Page 150: ...0 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 20 2 000 20 000 100 000 Hz Minimum 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 Results Actual Maximum 104 102 102 102 102 102 102 104 104 102 102 102 102 102 102 ...

Page 151: ... 100 000 20 000 2 000 20 20 2 000 20 000 100 000 100 000 20 000 2 000 20 Synthesizer Frequency Hz Displayed Reading of Step b O O Low level low lnp 20 2 000 20 000 100 000 AC level Accuracy I low Level High Input AC Level Accuracy 100 000 20 000 2 000 20 Minimum 96 98 98 98 98 98 98 96 96 98 98 98 98 98 98 96 96 98 98 98 96 96 96 96 96 96 96 96 Results Actual Maximum 104 102 102 102 102 102 102 10...

Page 152: ...z 20 1 000 1 000 1 000 1 000 20 000 50 000 50 000 100 000 100 000 3 0 3 0 2 5 1 9 0 3 3 0 3 0 0 3 3 0 2 5 1 9 LOW PASS FILTER 80 kHz 80 kHz 80 kHz 80 kHz 80 kHz 80 kHz Off Off Off Off Off Results Maximum Minimum Actual 297 75 Vdc 29 775 Vdc 2 9775 Vdc 0 397 Vdc 0 037 Vdc 0 054 Vdc 0 594 Vdc 2 9775 Vdc 29 775 Vdc 297 75 Vdc 302 25 Vdc 30 225 Vdc 3 0225 Vdc 0 403 Vdc 0 043 Vdc 0 043 Vdc 0 403 Vdc 3 ...

Page 153: ...000 2 000 2 000 2 000 2 000 2 000 20 000 20 000 Readings in step 4 200 000 200 000 300 000 300 000 10 60 60 10 100 000 100 000 100 000 100 000 Minimum 1 1 4 dB 81 0 dB 1 1 4dB 21 0 dB 31 0 dB 41 0 dB 51 0 dB 61 0 dB 71 0 dB 81 0 dB 81 0 dB 1 1 4dB 11 4 dB 81 0 dB 81 0 dB 1 1 4dB 1 1 4 dB 81 0 dB 12 4 dB 62 0 dB 62 0 dB 12 4 dB Results Actual Maximum 9 4 dB 79 0 dB 9 4 dB 19 0 dB 29 0 dB 39 0 dB 49...

Page 154: ...800 1 000 2000 3000 3500 5000 CClR Weighting Filter Option 012 or 052 31 5 63 100 200 400 800 1000 2000 3150 Minimum 19 99 19 99 99 895 99 895 149 980 360 Hz 28 000 Hz 76 000 Hz 65 0 dB 43 0 dB 23 0 dB 1 1 6 dB 4 6 dB 0 2 dB 0 0 dB 4 0 dB 6 6 dB 10 5 dB 39 0 dB 30 9 dB 24 9 dB 20 8 dB 14 3 dB 8 3 dB 2 4 dB 0 5 dB 5 1 dB 8 5 dB Results Actual Maximum 20 01 20 01 99 905 99 905 150 020 440 Hz 32 000 ...

Page 155: ...0 0 dB 11 2 dB 12 1 dB 11 8 dB 11 0 dB 9 7 dB 7 7 dB 1 0 dB 6 3 dB 12 7 dB 23 2 dB 44 7 dB 56 7 dB 43 5 dB 26 0 dB 17 5 dB 12 4 dB 8 5 dB 5 7 dB 3 7 dB 2 5 dB 1 6 dB 0 1 dB 1 2 dB 1 5 dB 2 0 dB 2 3 dB 2 3 dB 2 4 dB 2 9 dB 3 5 dB 6 2 dB 8 6 dB 15 5 dB 22 5 dB 29 5 dB 36 5 dB 30 5 dB 26 4 dB 19 9 dB 13 9 dB 8 0 dB 6 1 dB 11 O dB 12 2 dB 12 3 dB 12 2 dB 11 8 dB 10 5 dB 8 5 dB 1 0 dB 4 3 dB 10 7 dB 21...

Page 156: ...6 dB 6 5 dB 6 2 dB 5 4 dB 4 1 dB 2 1 dB 6 6 dB 11 9 dB 18 3 dB 28 8 dB 50 3 dB 51 0 dB 45 2 dB 39 9 dB 35 1 dB 30 7 dB 26 7 dB 23 0 dB 19 6 dB 16 6 dB 13 9 dB 11 5 dB 9 1 dB 7 1 dB 5 3 dB 3 7 dB 2 4 dB 1 3 dB 0 1 dB 0 1 dB 0 5 dB 0 7 dB 0 8 dB 0 7 dB 0 5 dB 0 0 dB 0 6 dB 1 6 dB 3 0 dB 5 3 dB 7 6 dB 10 3 dB 0 5dB 3 9 dB 5 4 dB 6 6 dB 6 7 dB 6 6 dB 6 2 dB C4 9 dB 2 9 dB 4 6 dB 9 9 dB 16 3 dB 26 8 dB...

Page 157: ...O COMMON MODE REJECTION RATIO PERFORMANCE TEST I Para No Test Description Minimum Oscillator Frequency Hz Controller Commands OUTPUT 728 SP 1 12 1 1 20 1 000 20 000 20 000 1 000 20 Results Actual Maximum 51 OO 51 00 1mV 1mV 10 0 mV 10 0 mV 3 2 mV 3 2 mV 4 35 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 158: ...test equipment refer to Table 1 3 in Section 1 of this manual for the minimum specifications It is important that the test equipment meet the critical specifications listed in the table if the Distortion Analyzer is to meet its performance requirements 5 4 FACTORY SELECTED COMPONENTS Factory selected components are identified on the schematics and parts list by an asterisk which follows the refere...

Page 159: ...tor Socket Assembly A12 Connector Filter Assembly A13 Power Supply and Mother Board Assembly Common Mode Rejection Ratio Performance Test 4 1 3 Input Flatness Adjustment 5 8 Common Mode RejectionAdjustment 5 9 400 Hz High Pass and Weighting Bandpass Filters Adjustment Distortion and Noise Performance Test Notch Filter Tune and Balance Adjustment AC Level Accuracy Performance Test 5 1 1 4 8 5 1 2 4...

Page 160: ...requency ofthe frequency standard is 5 or 10 MHz reverse the vertical input and external trigger connections on the oscilloscope 3 Set the oscilloscope s vertical sensitivity to view the Distortion Analyzer s time base reference or the frequency standard output Set the horizontal scale for 0 1 ps per division Set the oscilloscope to trigger externally 4 Adjust A8C27 for a waveform movement of 10 d...

Page 161: ...end tht assembly or probe its circiiilry whcn high volfagcis applied to tho inpiit Equipment AC Calibrator HP 745A o r Datron 4200 o r Fluke 5200A Dual Banana to BNC Adapter HP 10110B Dual Banana to BNC Adapter HP 1251 2277 Figlire 5 2 High Input Flatntw Adjirsrmenl Test Setiip Procedure High Input FlatnessAdjustment 1 Set the ac calibrator to 1 kHz at 4 Vrms 2 Connect the equipment as shown in Fi...

Page 162: ...100 kHz Adjust A2C10 for a reading between 99 50 and 100 5 Repeat steps 10 and 11 as often as needed until the flatness at 40 kHz and 100 kHz is within the limits given NOTE Uthejlatncss cannot hc adjiisted so that the 40 kHz and 100 kHz reading arc both within thc givcn limifs changc A2C9 as i llows IJ fhc100 kHz reading is highcv rhan af 40 kHz dt c reast A2C9 by approximuldy 1090 Iffhe40 kHz wa...

Page 163: ...the right display between 99 70 and 100 3 23 Set the ac calibrator frequency to 100 kHz Adjust A2C90 for a reading between 99 50 and 1O0So o Repeat steps 22 and 23 as often as needed until the flatness at 40 kHz and 100 kHz is within the limits given NOTE If the flatness cannot he adjirsted so that thc 40 kHz and 100 kHt readings arc both within Ihe given limits change AZCH9 as Jollow Ijthe 100 kH...

Page 164: ... off 30 Set the ac calibrator frequency to 1 kHz and level to 60 Vrms 31 The right display of the Distortion Analyzer should read between 58 8 and 61 2V Check that the input is on range 4 by pressing S Shift NOTCH TUNE S Shift NOTCH TUNE The first digit of the left display should be 4 Press AC LEVEL Press RATIO 32 Set the ac calibrator frequency to 40 kHz Adjust A2C110 HIGH 40 DB for a reading on ...

Page 165: ...D TERUI NAL BRAIDED BINDING OUTER POST CONDUCTOR Fig1I re 5 4 Common Mode Rcjt c lionA dji1slmcnl Tti TI StY I ip 1 Switch the Distortion Analyzer off then back on to initialize it Set the Distortion Analyzer s INPUT switch to FLOAT 2 Set the audio oscillator to 1V at 1 kHz The output impedance of the oscillator should be GOOR 3 Connect the equipment as shown in Figure 5 4 Note how the cable cente...

Page 166: ...quipment Feedthrough Termination 6000 HP 11095A Procedure 1 Switch the Distortion Analyzer off then back on to initialize it Set the INPUT switch to ground Set MEASUREMENT to DC LEVEL 2 Connect the 600a feedthrough or a short circuit or a 50fl load to the INPUT 3 Adjust A2R44 OFFSET for a steady reading of 0 OOV on the right display 5 9 Artisan Technology Group Quality Instrumentation Guaranteed 8...

Page 167: ...ollowing steps for each filter installed 400 Hz High Pass Filter Option 010 or 050 a Set the weighting filter o f f if on Set RATIO o f f Set the audio oscillator s frequency to 2 kHz Set RAT10 on b Press HIGH PASS 400 Hz Adjust A2AlR6 or A2A2R6 400 HZ for a reading between 99 60 and 99 80 on the right display c Set the audio oscillator s frequency to 1 kHz The right display should read between 99...

Page 168: ...n Set the audio oscillator s frequency to 6300 Hz Set RATIO o f f Set RATIO on b Press CCIR ARM WEIGHTING Adjust A2AlR7 or A2A2R7 CCIR for a steady reading of 213 8 6 6 dB on the right display A Weighting Filter Option 015 or 055 a Set HIGH PASS 400 Hz o r weighting filter o f fif on Set the audio oscillator s frequency to 1 kHz Set RATIO o f f Set RATIO on b Press A WEIGHTING Adjust A2AlR3 o r A2...

Page 169: ...ocedure 1 Switch the Distortion Analyzer off then back on to initialize it Set the INPUT switch to FLOAT Set MEASUREMENT to DISTN Set LOG LIN to LOG 2 Set the audio oscillator to 2 8V at 1 kHz Connect the equipment as shown in Figure 5 5 3 Set the oscilloscope to view the ac signal at the MONITOR output Set the oscilloscope s trigger to external 4 Adjust A3R62 TUNE OFFSET and A3R63 BAL OFFSET for ...

Page 170: ...litude display of the Distortion Analyzer agrees with the level measured by the external ac voltmeter at two different levels Since there are two ac to dc converters one true rms responding and one average responding two separate adjustments are made NOTE If an HP IB conlroller is no1 avuiluhk iisc he nexl udjirslmcnl procediire Voltmeter Adjustment Not Requiring an HP IB Controller Equipment Audi...

Page 171: ...e ac voltmeter within I mV See Service Sheet 6 Set the audio oscillator level to 150 mV On the Distortion Analyzer adjust A4R85 RMS OFFSET for a reading on the right display that is the same as the ac reading on the ac voltmeter within k0 5 mV See Service Sheet 6 If A4R85 does not have sufficient range add o r alter A4R143 or A4R144 as follows a Unsolder A4R143 or A4R144 if present b With a dc vol...

Page 172: ... the Distortion Analyzer adjust A4R149 AVGOFFSET for a reading on the right display that is the same as the reading on the ac voltmeter within O S mV See Service Sheet 6 12 Set AMPTD to 3V Repeat steps 10 through 12 until the right display of the Distortion Analyzer and the ac voltmeter are the same within the limits stated in steps 10 and 11 for b0t h 3V and 150 mV Artisan Technology Group Qualit...

Page 173: ...f an HP IB controllcr is availahkc this adjirs mc n can bc simpl fic d using adjI rs1mm1 procedI ire Vollmetcr A djitslmenI Using an HP IB Coniroller Audio Oscillator HP 8903B or HP 339A Digital Voltmeter A HP 3468A Digital Voltmeter B HP 3455A NOTE Voltmeter A is optional I f one volrrnrler i r iwd conn w it as rt qitirt d thc prcvio1r s hrlwtvn the poin1 s indiicarcd in hcproc c iirc and Figiirc...

Page 174: ...the voltage again which should be between 2 and 2 rnV dc Repeat the adjustment of A4R85 Set the audio oscillator amplitude to 3V Repeat steps 5 through 7 until the readings tor voltmeter A and voltmeter B agree within the limits stated for both 3V and 150 mV On the Distortion Analyzer select the averaging detector Set the audio oscillator amplitude to 2 5V and key in S Shift NOTCH TUNE S Shift NOT...

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HP 8903E, Operation And Calibration Manual

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