HP 8447A User's Manual
Contents
1. 1 Cable Assembly HP 11500A Tee BNC f UG 274B U 1 2 Model 84474 General Information Table 1 2 Recommended Test Equipment and Accessories contd Critical Specifications Recommended Model Use Note 1 Tee 2 50 ohms HP 11536A Type N connectors Adapter BNC male to Type N Female UG 349A U Low Pass Filter Cutoff Frequency 300 MHz Spectrum Analyzer Telonics TLP Series Frequency Range 0 5 400 MHz P Absolute Amplitude Calibration Dynamic Range 50 dB HP 140A Display Sec tion Model 8554L Spectrum Analyzer RF Section Model 8552A Spectrum Analyzer IF Section Noise Figure Meter Frequency Range 200 MHz HP 342A Noise Figure Range 0 to 15 dB Accuracy 0 5 dB VHF Noise Source Frequency Range 400 MHz HP 343A Excess Noise Ratio 6 3 dB 0 5 dB Noise Generator Temperature Limited Diode Frequency Range 600 MHz Output Level 10 dBm VHF Signal Generator E Frequency Input Output L R ports HP 10514A P 600 MHz X port 200 MHz Noise Performance 9 dB max Cable Assembly 2 BNC Male to BNC Male 9 long HP 105024 L P Performance Test A Adjustments j T Troubleshooting Double Balanced Mixer 1 3 1 4 Model 8447A Installation SECTION II INSTALLATION 2 1 INITIAL INSPECTION 2 2 Mechanical Check 2 3 If damage to the shipp2. 1 1 The 8447A provides 20 dB gain to signals in 50 ohm systems from 1 to 400 MHz 1 8 The Model 8447A amplifier can be used to make up resistive probe losses or improve sensitivi ty when used as a preamplifier to a spectrum analy zer or oscilloscope 1 9 OPTIONS 1 10 The Model 8447A 001 Dual Amplifier see Figure 1 2 is a two amplifier configuration which can be operated separately Each amplifier provides 20 dB gain or the amplifiers can be cascaded by a front panel patch cable to provide a total gain of 40 dB Table 1 1 Specifications Frequency Range 0 1 to 400 MHz Gain 20 dB 0 5 dB Gain Flatness 30 5 dB Noise Figure lt 5 dB 1 to 400 MHz Output Level point gt 7 dBm at 1 dB compression Distortion Harmonics at least 35 dB down at output levels up to 0 dBm Impedance 50Q both ports lo lt 0 26 VSWR lt 1 7 Power Requirements 115 or 230 Vac 10 50 to 400 Hz 15 Watts 27 VA max Weight Net 3 lbs 7 oz 1 56 kg shipping 5 lbs 1 oz 2 30 kg Dimensions 8 1 2 inches 216 mm by 5 1 8 inch 130 mm by 3 3 8 inches 85 8 mm Measured at 10 MHz 1 1 General Information Model 8447 A 1 11 EQUIPMENT SUPPLIED 1 12 The only equipment supplied with the Model 8447A Amplifier or the 8447A 001 Dual Amplifier is a 7 5 ft 2290 mm power cable 1 13 EQUIPMENT AVAILABLE SER 545 144 Table 1 2 and Table 1 3 list the test equip ment and test equipm
3. Table 6 3 Change HP Part Number 1820 0169 to HP Part Number 5086 7032 Check Digit 9 Change HP Part Number 1901 0159 to HP Part Number 1901 0743 Check Digit 1 DIODE PWR RECT IN4004 HOOVIA D 41 Change HP Part Number 08447 00001 to HP Part Number 08447 00054 Check Digit 5 PANEL FRONT STANDARD Add HP Part Number 08447 00055 Check Digit 6 PANEL FRONT OPTION 001 Change HP Part Number 1200 0043 to HP Part Number 0340 0664 Check Digit 4 INSULATOR XSTR TO 3 Page 8 9 Figure 8 3 Replace Figure 8 3 with the new Figure 8 3 included in this Manual Changes supplement Page 8 9 Figure 8 4 Change wire colors of power transformer primary windings as follows 90 top Winding to 902 904 to 905 and 905 to 904 Delete line connecting CR8 and C4 CHANGE 1 Page 6 4 Table 6 2 Change Cabinet Parts Lists to read as supplied in this Manual Changes supplement CHANGE 2 Page 1 1 Table 1 1 Change the following specifications Output Level gt 6 dBm at 1 dB compression point Distortion Harmonics at least 32 dB down at output levels up to 0 dBm Page 2 Paragraph 4 6 Change specification for Output Level Compression to gt 6 dBm at 1 dB compression point Page 4 3 Paragraph 5 6 Step 5 Change 7 dBm to 146 dBm in first line Page 4 8 Paragraph 4 8 Change specification to read Harmonics at least 32 dB down at output levels up to O dBm In step 3 change 35 dB to 32 dB two places Page 4 11 Para
4. attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met WARNING The CAUTION sign denotes a hazard It calls attention to an operating procedure practice or the like which if not correctly performed or adhered to could result in damage to or destruc tion of part or all of the product Do not proceed beyond a CAU TION sign until the indicated conditions are fully understood and met CAUTION 3 Model 8447A General Information i a SEE Figure 1 1 HP Model 8447A Amplifier Figure 1 2 HP Model 8447A 001 Dual Am ier plif 1 0 Model 8447 A General Information SECTION I GENERAL INFORMATION 1 1 INTRODUCTION 1 2 This manual contains all information re quired to install operate test adjust and service the Hewlett Packard Model 8447A Amplifier see Figure 1 1 This section contains instrument iden tification description options accessories specifi cations and other basic information 1 3 The various sections in this manual provide information as follows SECTION H INSTALLATION provides information relative to incoming inspec tion power requirements mounting pack ing and shipping etc SECTION HI OPERATION provides in formation relative to operating the instr
5. transformer primary is matched to the available line voltage the correct fuse is installed and Safety Precautions are taken see the following warnings In addition note the instrument s external markings which are described under Safety Symbols WARNINGS Servicing instructions are for use by service trained personnel only To avoid dangerous elec tric shock do not perform any servicing unless qualified to do so BEFORE SWITCHING ON THE INSTRUMENT the protective earth terminal of the instrument must be connected to the protective conductor of the mains power cord The mains plug shall only be inserted in a socket outlet provided with a pro tective earth contact The protective action must not be negated by the use of an extension cord power cable without a protective conductor grounding Grounding one conductor of a two conductor outlet provides no protection If this instrument is to be energized via an auto transformer for voltage reduction make sure the common terminal is connected to the neutrai termi nal of the power source Any interruption of the protective grounding conductor inside or outside the instrument or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury Whenever it is likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation Only fuses
6. with the required rated current voltage and specified type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard Do not operate the instrument in the presence of flammable gases or fumes Operation of any elec trical instrument in such an environment consti tutes a definite safety hazard Do not install substitute parts or perform any un authorized modification to the instrument 7 ih w gt Adjustments described in the manual are per formed with power supplied to the instrument while protective covers are removed Energy avail able at many points may if contacted result in personal injury Any adjustment maintenance and repair of the opened instrument under voltage should be avoided as much as possible and when inevitable should be carried out only by a skilled person who is aware of the hazard involved Capacitors inside the instrument may still be charged even if the instrument has been discon nected from its source of supply SAFETY SYMBOLS Instruction manual symbol the product will be marked with this symbol when it is necessary for the user to refer to the instruc tion manual in order to protect against damage to the product Indicates hazardous voltages Earth terminal sometimes used in manual to indicate circuit common connected to grounded chassis The WARNING sign denotes a hazard It calls
7. 7 20007 Check Digit O CABLE ASSEMBLY OUT BNC Change W4 to HP Part Number 08447 20008 Check Digit 1 CABLE ASSEMBLY IN BNC Change W5 to HP Part Number 08447 20009 Check Digit 2 CABLE ASSEMBLY OUT BNC Part Number 08447 00028 Check Digit 3 BRACKET SUPPORT AMPLIFIER OPTION Page 6 5 Table 6 3 Change HP Part Number 1820 0169 or 5086 7032 see errata to HP Part Number 5086 7356 Check Digit 0 Page 6 6 Table 6 3 Delete HP Part Number 08547 60003 Add W2 HP Part Number 08447 20006 Check Digit 9 CABLE ASSEMBLY IN BNC Add W3 HP Part Number 08447 20007 Check Digit 0 CABLE ASSEMBLY OUT BNC Add Wh HP Part Number 08447 20008 Check Digit 1 CABLE ASSEMBLY IN BNC Add W5 HP Part Number 08417 20009 Check Digit 2 CABLE ASSEMBLY OUT BNC Add A Part Number 08447 00028 Check Digit 3 BRACKET SUPPORT AMPLIFIER OPTION 001 CHANGE 7 Page 1 1 Table 1 1 Change the Gain specification for the instrument from 20 dB 0 5 dB to 20 dB 1 0 dB Page 4 2 Paragraph 4 6 At the top of page 4 2 change the specification for the Gain from 20 dB 0 5 dB to 20 dB 0 1 dB Page 4 3 Paragraph 4 6 Page 411 412 Table 4 1 In step 4 paragraph 4 6 change the tolerance for recording the data from 19 5 20 5 dB to 19 0 21 0 dB SAFETY CONSIDERATIONS GENERAL This is a Safety Class I instrument provided with terminal for protective earthing OPERATION BEFORE APPLYING POWER verify that the power
8. INSTRUCTIONS 3 9 Figure 3 2 thru 3 4 contain general applica tion information for the Model 8447A and the Model 8447 001 Dual Amplifiers 3 10 OPERATOR MAINTENANCE 3 11 Operator maintenance is limited to replace ment of the front panel LINE switch light the A1 power supply fuse and the rear panel fuse For any internal maintenance on the amplifiers see Section VII Maintenance 3 12 FUSES 3 13 To replace the rear panel fuse F1 remove the rear panel fuse knob and replace the fuse with 0 5 amp 250 V fuse 3 14 To replace the Al Power Supply A1F1 fuse turn the instrument on its top Lift tilt stand and remove the bottom cover Replace the fuse on the Al Power Supply board with 0 5 amp 250 V fuse 3 15 LAMP REPLACEMENT 3 16 To replace the front panel line switch lamp DS1 proceed as follows a Disconnect cord from rear panel recep tacle b Pull the white cover portion of this switch from the instrument and then remove the lamp from inside the cover Replace old lamp with a new lamp see Section VI for part number of DS1 d Place white cover into switch receptacle e Align tab on white cover with socket and push in j 3 1 Operation 3 2 Model 8447A FRONT AND REAR PANELS 1 LINE ON OFF Instrument power on off switch 2 INPUT 500 Connects input signal to amplifier CAUTION Do not apply more than 10 volts de to the input Maximum power that can be ap
9. OPERATING AND SERVICE MANUAL 8447A MPLIFIER DUAL AMPLIFIER 1 400MHz 21 Packaro O SENET OPERATING AND SERVICE MANUAL 8447A AMPLIFIER DUAL AMPLIFIER 1 400 MHz SERIAL PREFIX 955 This manual applies directly to HP Model 8447A Amplifier and Model 8447A 001 Dual Amplifier having serial prefix number 955 SERIAL PREFIXES NOT LISTED For serial prefixes above 955 a Manual Changes sheet is included with this manual OHEWLETT PACKARD COMPANY 1970 1400 FOUNTAIN GROVE PARKWAY SANTA ROSA CALIFORNIA 95404 U S A MANUAL PART NUMBER 08447 90003 Printed APRIL 1970 MANUAL CHANGES T MANUAL IDENTIFICATION Model Number 8447A Date Printed APRIL 1970 Part Number 08447 90003 This supplement contains important information for correcting manual errors and for adapting the manual to instruments containing improvements made after the printing of the manual To use this supplement Make all ERRATA corrections Make all appropriate serial number related changes indicated in the tables below Serial Prefix or Number 1145A00356A thru 1 01517 01566 and 01571 Make Manual Changes Make Manual Changes Serial Prefix or Number 1145401518 thru 01565 01567 thru 01570 01572 thru 01575 and 1529A prefix 1 21234 12 3 4 5 6 2123406657 and 2439A 1 2 3 4 5 6 7 p NEW ITEM NOTE Manual change supplements are revised as often as necessary to keep manuals as curre
10. ation address inquires to your nearest HP sales and service office 2 21 STORAGE AND SHIPMENT 2 22 Packaging 2 23 The following paragraphs contains a general guide to repackaging of the instrument for ship ment Refer to paragraph 2 25 if the original con tainer is to be used refer to paragraph 2 27 if it is not l 2 24 If the instrument is to be shipped to Hew lett Packard for service or repair attach a tag to the instrument identifying the owner and indica ting the service or repair required include the model number and full serial number of the instrument 2 1 Installation 2 25 Original Packaging 2 26 If original container is to be used proceed as follows a Place instrument in original container If itis not available a suitable container can be pur chased from your nearest HP sales and service office b Be sure the container is well sealed with strong tape or metal band 2 27 Other Packing Material 2 28 If original container is not used proceed as follows a Wrap instrument in heavy paper or plastic before placing in inner container O INSERT DIVIDER ENGAGING TABS IN TOP AND BOTTOM MOUNTING SLOTS TWIST DIVIDER TO VERTICAL POSITION O PUSH IN TO LIMIT SLIDE LATCH TO LOCK DIVIDER Model 8447A b Place packing material around all sides of the instrument and protect panel face with card board strips c Place instrument in a heav
11. ent accessories necessary to test align and service the Model 8447A Amplifier SERIAL NUMBER PREFIX SERIAL NUMBER 1 15 WARRANTY 1 16 Certification and warranty information for the Model 8447A Amplifier and Model 8447 A 001 Dual Amplifier appears on the inside front cover of this manual Figure 1 3 Instrument Identification Table 1 2 Recommended Test Equipment and Accessories Instrument Type Recommended Model Use Note 1 Critical Specifications Signal Generator Frequency Range 10 MHz to 400 MHz HP 608E F Output Level 10 dBm min Test Oscillator HP 651B Frequency Range 100 kHz to 10 MHz Output Flatness 12 Output 30 mV Vector Voltmeter Frequency Range 10 MHz to 400 MHz Bandwidth 1 kHz Sensitivity 10 mV to 1 Vrms Input Impedance 20 1 megohm HP 8405A Voltage Range 30 mV HP 400E P A T AC Voltmeter l Accuracy 1 Frequency Range 100 MHz to 400 MHz Coupling Attenuation 20 dB nominal Directivity Inc port 32 dB Refl port 30 dB Dual Directional HP 778D Coupler Frequency Range 500 kHz to 100 MHz HP 4815A Accuracy 2 Vector Impedance Meter Digital Voltmeter Range 50 V HP 3440A 3443A A T _ Accuracy 1 Ohmmeter Resistance Range 1 ohm to 100 megohm HP 412A Accuracy 10 Cable Assembly BNC Male to BNC Male 4 long HP 10503A
12. ge step 6 to read as follows To check flatness set the signal level at Channel A to 30 dBm Connect a 10 dB attenuator to each tee between the tee and the adapter Note the level difference between Channel A and Channel B as the generator frequency is tuned from 10 MHz to 400 MHz Keep the input level to the amplifier CHANNEL A constant and note the variation in Channel B Channel B should change gt 1 dB 4 0 5 dB Page 4 5 Paragraph 4 7 Under SPECIFICATION change parts to ports Page 4 10 PERFORMANCE TESTS Add performance test 4 10 Reverse Isolation supplied in this Manual Changes supplement Page 4 11 Table 4 1 y Add Reverse isolation information to Performance Test Record suppesed in this Manual Changes supplement Page 5 2 Paragraph 5 8 Change Figure 4 1 to Figure 5 1 in step 1 Page 6 2 Table 6 2 iu Change C2 to HP Part Number 0160 2049 Check Digit 1 CAPACITOR FDTHRU 5000PF 80 20 500V Change A CR1 to HP Part Number 1901 0743 Check Digit 1 DIODE PWR RECT INA4OO HOOVIA DO 1H1 Page 6 3 Table 6 2 Change U1 and U2 to HP Part Number 5086 7032 Check Digit 9 Change HP Part Number 1200 0043 to HP Part Number 0340 0664 Check Digit 4 INSULATOR XSTR TO 3 Page 6 4 Table 6 2 Change Reference Designation 8 to HP Part Number 08447 00054 Check Digit 3 PANEL FRONT STANDARD Add Reference Designation 3 HP Part Number 08447 00055 Check Digit 6 PANEL FRONT OPTION 001 Page 6 5
13. graph 4 8 Change limit under Min to 32 CHANGE 3 Page 6 2 Table 6 2 Change A1CR9 to HP Part Number 1884 0073 Check Digit 2 THYRISTOR SCR TO 5 VRRMz100 Add A1R13 HP Part Number 0757 0401 Check Digit 0 R FXD MET FLM 100 OHM 1 1 8W Page 8 9 Figure 8 4 Add R13 100 ohms from junction of CR8 anode CRO gate to ground CHANGE 4 Page 6 3 Table 6 2 Change S1 to HP Part Number 3101 2195 Check Digit 7 SWITCH PUSHBUTTON DPST recommended replacement Change XF1 to HP Part Number 2110 0470 Check Digit 5 FUSEHOLDER BODY Add the following HP Part Numbers and description 2110 0465 Check Digit 8 FUSEHOLDER CAP 2110 0467 Check Digit 0 FUSEHOLDER NUT HEX 1400 0090 Check Digit 9 WASHER FLAT NEOPRENE Delete HP Part Number 2950 0038 Page 6 4 Figure 6 1 Change Reference Designation 6 to HP Part Number 08447 00050 Check Digit 1 Page 8 9 Figure Bull Change S1 ON OFF switch as shown in the partial schematic supplied in this Manual Changes supplement CHANGE 5 Page 6 3 Table 6 2 Change XF1 HP Part Number to 2110 0564 Check Digit 8 Change FUSEHOLDER CAP HP Part Number to 2110 0565 Check Digit 9 Change FUSEHOLDER NUT HP Part Number to 2110 0569 Check Digit 3 Delete FUSEHOLDER WASHER entry CHANGE 6 Page 6 3 Table 6 2 Change U1 and U2 to HP Part Number 5086 7356 Check Digit 0 Change We to HP Part Number 08447 20006 Check Digit 9 CABLE ASSEMBLY IN BNC Change W3 to HP Part Number 0844
14. ing carton is evident ask the carrier s agent to be present when the in strument is unpacked Inspect the instrument for mechanical damage Also check the cushioning material for signs of severe stress 2 4 Performance Check 2 5 The electrical performance of the Model 8447A or Model 8447A 001 should be verified upon receipt Repeat each test on each amplifier in the Model 8447A 001 Dual Amplifier instrument Performance checks suitable for incoming inspec tion are given in Sections IV Performance Tests 2 6 Claims for Damage 2 7 If the instrument is mechanically damaged in transit notify the carrier and the nearest Hewlett Packard field office immediately A list of field offices is contained in the back of this man ual Retain the shipping carton and padding materi al for the carrier s inspection The field office will arrange for replacement or repair of your instru ment without delay for claim settlements against the carrier Before shipment this instrument was inspected and found free of mechanical and electri cal defects If there is any deficiency or if electri cal performance is not within specifications notify your nearest Hewlett Packard sales and service office 2 8 PREPARATION FOR USE 2 9 Power Requirements 2 10 The Model 8447A or Model 8447A 001 operates from 115 or 230 volts ac line voltage at any line frequency between 50 and 400 Hz A slide switch on the rear panel is set t
15. nt and accurate as possible Hewlett Packard recommends that you periodically request the latest edition of this supplement Free copies are available from all HP offices When requesting copies quote the manual identification information from your supplement or the model number and print date from the title page of the manual _ 10 FEBRUARY 1986 HEWLETT PACKARD Printed in U S A ERRATA Add to front of manual SAFETY CONSIDERATIONS supplied in this Manual Changes Supplement Page 1 1 Table 1 1 Add Reverse Isolation gt 30 dB Page 3 1 Paragraph 3 7 Add the following caution before the first sentence in step c CAUTION The input to the HP 8447A amplifier is very susceptible to damage from electrostatic discharge Before connecting any coaxial cable to the input jack of the amplifier make certain that static electricity buildup in the cable is completely discharged Page 4 1 Paragraph 4 5 Add the following caution CAUTION The input to the HP 8447A amplifier is very susceptible to damage from electrostatic discharge Before connecting any coaxial cable to the input jack of the amplifier make certain that static electricity buildup in the cable is completely discharged Page 4 2 Paragraph 46 Add 10 dB attenuator 2 required HP 8491 Opt 010 to the equipment list Change specification for Output Level Compression to gt 7 dBm at 1 dB compression point Page 4 3 Paragraph 4 6 Chan
16. o the correct posi tion for the line voltage available A 0 5 ampere line fuse is required for either 115 or 230 volt operation 2 11 Power Cable 2 12 To protect operating personnel the Nation Electrical Manufacturers Association NEMA recommends that the instrument panel and cabinet be grounded All Hewlett Packard in struments are equipped with a three conductor po wer cable which when plugged into the appropri ate receptical grounds the instrument The offset pin on the power cables three prong connector is the ground wire 2 13 To preserve the protection feature when operating the instrument from a 2 conductor out let use a three prong to two prong adapter and connector the green pigtail on the adapter to ground 2 14 The power cord or power input connector meet the specifications established by the Interna tional Electrotechnical Commission IEC 2 15 Operating Environment 2 16 The operating range of the Model 8447A or Model 8447 001 is from 0 C to 55 C The ampli fier can be stored in a temperature range of 40 C to 75 C 2 17 Bench Mounting 2 18 The Model 8447A is equipped with plastic feet and tilt stand in place ready for use as a bench instrument 2 19 Rack Mounting 2 20 The Model 8447A may be rack mounted by using an adapter frame The adapter frame is a rack frame that accepts any combination of sub modular units see Figure 2 1 For additional in form
17. plied to the input from a 50 ohm source is 1 Watt When con necting the amplifier to a low im pedance source a limiting resistor must be placed in series with the input port to limit the peak current to amaximum of 150 mA To com 3 pute limiting resistor assume that the input impedance can be as low 3 as 22 under overload conditions 3 OUTPUT 502 Connects amplifier output to load CAUTION Do not apply more than 30 volts de to output 4 SELECTOR Selects 115 volts ac or 230 volts ac primary power 5 Fuseholder Contains 0 5 ampere fuse for 115 or 230 volt operation 6 AC Power Connection Connects line po wer to the instrument 15 2304 110 f 458 440 ZIYA MAX Figure 3 1 Front and Rear Panel Controls and Connectors Model 8447A Operation INPUT OUTPUT 50 NN INPUT OUTPUT 502 502 AMPLIFIER AMPLIFIER INPUT INPUT CABLE OUTPUT Figure 3 2 General Application of Figure 3 3 Cascade Operation of 8447A 001 8447 A Amplifier Dual Amplifier OSCILLOSCOPE DUAL _CHANNEL AMP TIME BASE DEVICE UNDER TEST A CABLE ASSY RESISTIVE PROBE DUAL AMPLIFIER HP 8447A 001 Figure 3 4 Single Amplifier Operation of 8447A 001 Dual Amplifier 3 3 3 4
18. s are included in Figures 3 2 3 3 and 3 4 dia 3 6 OPERATOR CHECKS 3 7 Five steps should be taken by the operator to determine the operational condition of either the Model 8447A Amplifier or the Model 8447A 001 Dual Amplifier a Turn instrument on check to see if the front panel LINE light is on If the light is on proceed to step c If light is off proceed to step b b If the light is off remove the fuse from the rear panel Check to see if the fuse is good If _ the fuse is good proceed to step c If the fuse is bad replace the fuse and turn the instrument on If the fuse opens again see Section VIII Maintenance for repair c If the line fuse is good and the power switch is depressed connect a known signal 0 1 to 400 MHz to front panel INPUT Monitor the OUTPUT jack to see that the Model 84474 pro vides approximately 20 dB gain to the input signal If there is no gain go to step d d f the rear panel fuse is OK turn the in strument top side down and remove the bottom cover Check to see that the fuse on the A1 Power Supply board is good If the fuse is bad replace the fuse and turn the instrument back on If the fuse blows again see Section VIII Maintenance for repair e If the Model 8447A provides the proper gain and the front panel light is out replace the lamp see paragraph 3 10 Operator Maintenance NOTE Be sure to provide 502 source and load impedances 3 8 OPERATING
19. u ment SECTION IV PERFORMANCE TEST provides information required to verify that the instrument is performing in accor dance with published specifications SECTION V ADJUSTMENTS provides in formation required to properly adjust and align the instrument after repairs are made SECTION VI PARTS LIST provides or dering information for all replaceable parts and assemblies SECTION VII MANUAL CHANGES nor mally will contain no relavent information in the original issue of a manual This sec tion is reserved to provide back dated and up dated information in manual revision or reprints SECTION VII SERVICE includes infor mation necessary to efficiently service the instrument 1 4 INSTRUMENT COVERED BY MANUAL 1 5 Hewlett Packard instruments carry an 8 di git seria number prefix see Figure 1 3 on the back of the panel When the serial number prefix on the instrument serial number plate of your in strument is the same as one of the serial prefix numbers on the inside title page of this manual the manual applies directly to the instrument When the instrument serial number prefix is not listed on the inside title page manual changes sheets and manual updating information is provided Later ed itions or revisions to the manual contain the re quired change information in Section VII 1 6 DESCRIPTION 1 7 HP Model 8447A Amplifier is a general purpose low noise wideband amplifier see Figure
20. y carton or wooden box and seal with strong tape or metal band See Table 2 1 for the required shipping car ton test strengths d Mark shipping container DELICATE IN STRUMENT FRAGILE etc Table 2 1 Shipping Carton Test Strength Gross Weight Ibs Carton Test Strength Ibs upto 10 10 to 30 30 to 120 120 to 140 140 to 160 PUSH RETAINER DOWN TO RELEASE SLIDE INSTRUMENT A INTO CASE TO SET RETAINER BACK IN PLACE ENGAGE HOOKS FIRST ON ONE SIDE OF DIVIDER THEN ON OTHER PUSH RETAINER UP TO LOCK Figure 2 1 HP Model 1051A Combining Case Instrument Installation 2 2 Model 8447A Operation SECTION III OPERATION 3 1 INTRODUCTION 3 2 This section contains the basic information required to operate the Model 8447A Amplifier or the Model 8447A 001 Dual Amplifier 3 3 The Model 8447A and the Model 8447A 001 provide 20 or 40 dB gain cascaded amplifi ers respectively The amplifier can be used in 50 ohm systems to increase sensitivity make up for probe losses and general amplification of signals from 0 1 to 400 MHz The amplifier can also pro vide some amplification of signals up to 700 MHz 3 4 PANEL FEATURES 3 5 The Model 8447A and Model 8447 001 front and rear panel controls and connectors are explained in Figure 3 1 The descriptions are keyed to the corresponding items which are indicated on the figures Further information regarding the vari ous uses of the amplifier
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