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HP 3585A, Service Manual

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HP 3585A Service Manual Download Page 235

Backdating 

Model  3585A 

7-6 

b .   Set the -hp- 3585A to: 

FREQUENCY  SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  l kHz 
RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  300Hz 

dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  I dB 

A-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  on 

c.  Adjust  A13L6  so  that  the trace approximates a  straight,  horizontal  line.  (See Figure 

7-3 .) 

d.  Set the -hp- 3585A to: 

A-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  off 
FREQUENCY  SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50kHz 

dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10dB 

e.  Adjust A1 3C30 so that the trace is symmetrical  about the marker.  (See Figure  7-4.) 

f.  Place jumper A 1 3 J2 to  the  "OP"  position . 

7· 1 4.  Fifth  LC  Stage  Adjustment  (A1 3:  L5  and  R28) 

a.  Place jumper A 1 3J3  to the "T"  position. 

h. 

Set the  -hp- 3585A to: 

RES  BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  l kHz 
FREQUENCY  SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3 . 3kHz 
dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  IdB 
A-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  on 

c.  Adjust  A1 3L5  so  that  the trace approximates  a  straight,  horizontal  line.  (See  Figure 

7-3 .) 

d.  Set the -hp- 3585A to: 

A-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  off 
RES  BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30kHz 
OFFSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  on 

(allow one  complete  sweep) 

ENTER  OFFSET 
RES  BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  l kHz 

e.  Adjust  A13R28  for  a  .OOdB  marker  amplitude. 

f.  Place jumper A1 3J3 to  the  "OP"  position. 

7 · 1 5.  Fourth  LC Stage Adjustment  (A 1 3:  L4  and  R2D) 

a.  Place jumper A1 3J4 to  the  "T"  position. 

Scans by ARTEK MEDIA => 

Summary of Contents for 3585A

Page 1: ...General Information Installation Operation Overview Performance Test Adjustments Circuit Descriptions Backdating SERVICE MANUAL SPECTRUM ANALYZER Scans by ARTEK MEDIA 3585A VOLUME I r hO HEWLETT PACKARD ...

Page 2: ...Model 3585A VOLUME 11 TABLE OF CONTENTS Section VIII FAULT ISOLATION IX REPLACEABLE PARTS X SCHEMATICS VOLUME III TABLE OF CONTENTS Section XI SERVICE Scans byART EKMEDIA Table of Contents iii ...

Page 3: ...erational Verification Tests Overview 4 3 iv Section Page 4 6 Semi Automatic Performance Tests Overview 4 3 4 7 Operational Verification Tests 4 4 4 8 Synthesizer Reference Connections 4 4 4 9 Frequency Accuracy 4 5 4 10 Calibrator Test Optional 4 6 4 11 Cal Offset Test Optional 4 7 4 12 Range Calibration 4 8 4 13 Amplitude Linearity Test 4 9 4 14 Reference Level Accuracy 4 10 4 15 50 750 Frequenc...

Page 4: ...through Adjustment 5 68 5 45 Electrical Isolation Test 5 68 5 46 Tracking Generator Adjustment 5 69 5 47 HP IB Adjustment 5 69 5 48 X Y Plotter Adjustment 5 70 Section Page VI CIRCUIT FUNCTIONAL DESCRIPTIONS 6 1 6 1 Introduction 6 1 6 2 Circuitry Overview 6 1 Section Page 6 3 RF IF SG A 6 2 6 4 Local Oscillator SG B 6 2 6 5 Processor 110 and Keyboard SG C 6 2 6 6 Display SG D 6 3 6 4 6 7 HP IB SG ...

Page 5: ...se Detector 7 35 7 36 7 29 Applicable Serial Numbers 7 35 7 36 7 30 Affected Manual Areas 7 35 7 36 7 31 Description of Change 7 35 7 36 7 32 l4 Crystal Replacement Procedure 7 41 LIST OF TABLES Table Page 1 1 Specifications 1 5 1 2 Recommended Test Equipment 1 1111 12 4 1 Recommended Test Equipment 4 2 4 2 HP IB Error Definitions 4 32 4 3 HP IB Check Program Listing For The 9825A Calculator 4 33 ...

Page 6: ...g Display Driver Board A64 5 18 5 15 CRT Alphanumeric Adjustments 5 19 Figure Page 5 16 LO Control Board A34 5 20 5 17 Fraction N VTO A31 5 21 5 18 API Adjustment Waveforms 5 22 5 19 Step Loop VTO Board A23 5 23 5 20 Step Phase Detector Board A26 5 25 5 21 First LO VTO Board A22 5 26 5 22 A D Converter Board AI6 5 28 5 23 Video Filter Board AI5 5 28 5 24 Log Amp Board AI4 5 30 5 25 IF Adjustment D...

Page 7: ...6 17 Counter Block Diagram 6 45 6 46 6 18 X Y Plotter Block Diagram 6 47 6 48 6 19 Switching Power Supply Block 6 51 6 52 6 20 3585A Detailed Block Diagram 6 53 6 54 viii Figure Page 7 1 Symmetry Adjustment A13C41 7 3 7 2 Preliminary Adjustment 7 4 7 3 Symmetry Adjustment 7 4 7 4 Symmetry Adjustment 7 4 7 5 Reference Level Set up 7 5 Scans byART EKMEDIA ...

Page 8: ...ms for customer warranty Material Failure Report MFR credit and Heart System credit A CRT Failure Report form see reverse side of this page must be completely filled out and sent with the defective CRT to the following address HEWLETT PACKARD COMPANY 1900 Garden of the Gods Road Colorado Springs Colorado 80907 Attention Parcel Post Address P O Box 2197 Colorado Springs Colorado 80901 CRT Customer ...

Page 9: ... marked with this symbol must be connected to ground in the manner described in the installation operating manual and before operating the equipment Frame or chassis terminal A connection to the frame chassis of the equipment which normally includes all exposed metal struc tures Alternating current power line Direct current power line Alternating or direct current power line WARNING I The WARNING ...

Page 10: ... instrument covers Component replacement and internal adjustments must be made by qualified maintenance personnel Do not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power and discharge circuits before touching them DO NOT SERVICE OR ADJUST ALONE Do not attempt internal serv...

Page 11: ...facturing design or traceability to the U S National Bureau of Standards are included in Table 1 1 of this manual Specifications listed in this manual supersede all previous specifications for the Model 3585A 1 3 INSTRUMENT AND MANUAL IDENTIFICATION The instrument identification serial number is located on the rear panel Hewlett Packard uses a two section serial number consisting of a four digit p...

Page 12: ... feature to main tain the specified dynamic range Other microcomputer controlled features include coupl ing of Frequency Span Bandwidth and Sweep Time centering of signals moving signals to the Reference Level and storage and measurement of frequency and amplitude Offsets Microcomputer control further allows the operator to override the automatic features of the 3585A The 3585A s Local Oscillator ...

Page 13: ...manner the operator is not required to understand the calculator language only answer the questions on the 3585A display 1 5 OPTIONS The following options are available for use with the Model 3585A hp Part Number Option 907 Front Handle Kit 5061 0091 Option 908 Rack Mounting Kit 5061 0079 Option 909 Front Handle and Rack Mounting Kit 5061 0085 Option 910 Additional Set of Manuals Service Manual 03...

Page 14: ... by 9 pf b Balancing Transformers 1 11473A 75 0 to 600 0 WECO 310 2 11473B 75 0 to 600 0 Siemens 9 REL STP 6AC 3 11474A 75 0 WECO 241 4 11475A 75 0 to 150 0 Siemens 9 REL STP 6AC 5 11476A 75 0 to 124 0 WECO 408A c Preamplifiers 1 461A 20 dB or 40 dB gain 1 kHz to 150 MHz 2 465A 20 dB or 40 dB gain 5 Hz to 1 MHz d VHF Switch 1 59307A provides one pair of single throw 4 pole switches e Permanent Rec...

Page 15: ... 40 1 MHz Settable with 0 1 Hz resolution 1 0 Hz to 40 MHz in 1 2 5 steps Accuracy 0070 0 2 of Frequency Span setting Marker Readout Accuracy 0 2 of Frequency Span Resolution Bandwidth Counter Accuracy 0 3 Hz 1 x 1 0 7 month of counted frequency for a signal 20 dB greater than other signals and noise in the resolution bandwidth setting Manual Frequency Accuracy 0 1 Hz 1 x 1 0 7 month using the int...

Page 16: ...20 dB 50 dB 80 dB 9 5 dB I 0 3 dB I 0 6 dB I 1 0 dB I 2 0 dB Frequency Response referred to center of span Terminated 5 017 5 input 5 dB High Impedance 1 M input 20Hz 1 0 MHz 40 1 M Hz I 0 7 dB I 1 5 dB I Marker Amplitude Accuracy Center Frequency or Manual frequency at the Reference Level Use Reference Level accuracy from 30 dBm to 1 1 5 dBm add Amplitude Linearity below 1 1 5 dBm To Calculate Ma...

Page 17: ... Required frequency accuracy 5 x 1 0 6 When an external reference is used the 1 x 1 0 7Imonth specification on the Counter and Manual frequency accuracy is replaced by the accuracy of the external reference OUTPUT Tracking Generator Level o dBm to 1 1 dBm 50 with a single turn knob continously variable Frequency Accuracy 1 Hz relative to analyzer tuning Frequency Response 0 7 dB Impedance 50 1 4 d...

Page 18: ...e two signals Terminated 5017 50 input 80 dB except 2nd order IM with one or both of the input signals within the range of 1 0 MHz to 40 MHz 70 dB High Impedance 1 MO input 70 dB Residual Responses no signal at input 2 5 dBm Range 1 20 dBm Lo Feed Through 1 5 dB with respect to Range Average Noise Level 25 dBm Range 5017 50 input 90 100 110 20Hz 115dBml 100Hz 120 ml 130 140 AVERAGE NOISE LEVEL 113...

Page 19: ...oints are retained and displayed at the left hand data point This assures that no signal responses are missed SWEEP Modes Continuous Single or Manual Trigger Free Run Line or External Time Resolution 0 2 sec Minimum 0 2 sec Maximum Frequency Span minimum sweep rate limit The minimum sweep rate limit is 1 0 kHz Res BW 1 0 sec Hz of Frequency Span or 0 1 Hz sec 5 3 kHz Res BW 200 sec Hz of Frequency...

Page 20: ...p 3311A See Note 3 Square Wave 1OOns rise time de Offset 1V Hp IB x hp 10631 Interconnection Cables Hp IB Interface Cable hp 9B25A Comp _ atible x hp 9B034A Impedance Matching Frequency 0 1 to 40 MHz x x hp 85428 Network 501l to 751l VSWR 1 05 Minimum Loss Pad Mixer Double Frequency 0 1 40MHz x hp 10534 8alanced See Note 3 Oscilloscope Vertical Scale 5 mV Div x hp 1740A See Note 2 Horizontal Scale...

Page 21: ...incomplete or if the instrument does not pass the Performance Tests notify the nearest hp Sales and Service Office If the shipping container is damaged or the cushioning material shows signs of stress notify the carrier as well as the Hewlett Packard Office Keep the shipping materials for the carrier s inspection WARNING I To avoid the possibility of dangerous electrical shock do not apply ac line...

Page 22: ...E HP 8120 0684 CABLE HP 8120 0696 CABLE HP 8120 1703 CABLE HP 8120 0698 STO S 4195 fRev The number shown for the plug is the industry identifier for the plug onlv The number shown for the cabkt is an HP part number for a complete cable including the plug UL listed for use in the United States of America Figure 2 1 Power Cables 2 5 GROUNDING REQUIREMENTS q PLUG NEMA 5 15P CABLE HP 8120 1521 To prot...

Page 23: ... least once every 30 days To clean the fan filter simply flush it with soapy water rinse and then air dry 2 1 0 Thermal Cutout The 3585A is equipped with a thermal cutout switch which automatically disables the power supplies when the internal temperature exceeds 65 C external termperature approximate ly 55 C To reset the thermal cutout set the LINE switch to OFF allow time for the in strument to ...

Page 24: ...ge Front Handle Kit Option 909 hp Part Number 5061 85 d Install an Instrument Support Rail on each side of the instrument rack The Instru ment Support Rails used to support the weight of the instrument are included with hp rack mount cabinets WARNING I 1 The weight ofthe 3585A must be supportedby Instrument sup port Rails inside the instrument rack Do not under any cir cumstances attempt to rack m...

Page 25: ...s procedure c Attach a slide inner member bracket to each side of the 3585A d Attach the slide s outer members to the instrument rack according to the instructions included with the slides e If your instrument rack has extension legs on the front be sure that they are extended at this time WAR N I N G I 1 The weight of the 3585A can overturn your instrument rack when the mounting slides are fully ...

Page 26: ...is equipped with a three wirepower cord which when plugged into an appropriate receptacle grounds the instrument The of f set pin on the power plug is the ground connection To preserve this protection feature the power plug shall only be inserted in a three terminal receptacle having a pro tective earth ground contact The protective action must not be negated by the use of an extension cord or ada...

Page 27: ...t is flashing If any of the above conditions is not met turn the instrument off immediately and contact the nearest hp Sales and Service Office or a qualified service technician r f l 3 5A SP CTRLM ANAL YIER 2OHz 4CMtz H E _ L E f T P A C K A R O t tU t o OIaII _ 11 20 000 000 0111 IO dB D I V MHIE 1 0 Oda _ I aon If _ _ L _ _ COlTS 20 ODD OOO lIHz IIBI JO KHz rs8TAT _TE _ 8 T L I INN 40 000 000 0...

Page 28: ...ne on the left hand side of the CRT graticule REF 25 0 dBm MARKER 20 000 000 0 Hz 10 dB DIV RANGE 25 0 dB 97 1 dB CENTER 20 000 000 0 Hz SPAN 4 0 000 000 0 Hz RBW 30 KHz VBW 30 KHz ST 2 SEC Figure 2 4 Turn On Display j Press the front panel t key This will force an internal verification test and Automatic Calibration The CALIBRATING message will appear on the CRT screen If the beeper sounds and or...

Page 29: ...ng an HP IB system observe the following rules a The total cable length for the system must be less than or equai to 20 meters 65 feet b The total cable length for the system must be less than or equa to 2 meters 6 feet times the total number of devices connected to the bus PIN 1 2 3 4 13 1 4 15 16 5 1 7 6 7 8 9 10 1 1 1 2 18 19 20 21 22 23 24 LINE 0101 0102 0103 0104 0105 0106 0107 0108 EOI REN D...

Page 30: ...ped from the factory with an ASCII listen address of and a talk ad dress of K This corresponds to a Select Code of eleven You will probably want to leave the addresses as they are but they can be changed if the need arises The procedure is as follows WAR N I N G I Address changes require access to the interior of the instrument where hazardous vo tages arepresent and must there fore beper formed b...

Page 31: ... 1 0 0 1 1 0 1 1 1 0 0 1 0 0 1 0 1 1 1 0 1 1 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 0 0 1 0 1 0 0 1 0 0 1 1 0 1 1 1 0 0 1 0 0 1 0 1 1 0 1 1 1 0 1 1 0 1 1 1 A 1 0 1 U 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 NOTE When changing the HP IB address do not change the switches on the A45 board tab color yel owl green The HP IBAddress Switch is under the gray ribbon cable o Position Front of 3 58 5A...

Page 32: ...vice technician Also include your return address the instrument s model number andfullserial number In any correspondence identif y the instrument by model number and full serial number 2 22 Other Packaging The following general instructions should be used for repackaging with commerically available materials a Wrap the instrument in heavy paper or plastic If shipping to a Hewlett Packard of fice ...

Page 33: ...nd in the Operating Manual Contents of the overview are as follows Performance Summary Page 3 2 Turn On and Warmup Page 3 3 Front Panel Features Page 3 5 Rear Panel Features Page 3 23 I I _ _ 1 _ _ I I I I OFF OJON 4 g L I NE L TRACK I NG GENERATOR f EXT TR I GGER EJJ rn Q m rn m m i l QJJ QJ QJ JIJJ m o o s PROBE POWER The 3 585A Front Panel Auro Rj r LVl G S G r 1 EOANCE G on n MAX 42V Pk MAX I ...

Page 34: ...c distortion and third order intermodulation distortion 80 dB below signal 5 to the Range Setting Average Noise Level 137 dBm in the 3 Hz Resolution Band width Accuracy Best achievable accuracy over the measurement range is 0 4 dB to 1 3 dB depending on the level SWEEP Time 0 2 sec to 5 9 6 5 2 hrs INPUT Signal Inputs T e r m i n ated 5 0 1 7 5 0 r e t u r n l o s s 26 dB High Impedance 1 MO 3 shu...

Page 35: ...time the instrument is shipped from the factory or the reference frequency is adjusted using the procedure outlined in Volume One of the Service Manual The Oven Reference time coefficient is included in the Counter and Manual fre quency accuracy specifications To use the internal Oven Reference connect the BNC to BNC jumper supplied with the in strument between the rear panel OVEN REF OUT and EXTE...

Page 36: ...When the reference is initially connected the beeper will sound and the L O UNLOCKED message will appear on the screen The message will continue to be displayed until the master oscillator is pro perly phase locked to the external reference 3 6 Operational Verification The 3585A automatically performs an internal operational verification test and calibration during its turn on sequence and also wh...

Page 37: ...te its ap pearance you will quickly discover that the 3585A is very easy to operate It is actually easier to use than most oscilloscopes and almost as straightfor ward as an auto ranging digital voltmeter You will have no trouble learning to operate the 3585A regardless of your range of experience with spectrum analyzers By taking full advantage of the 3585A s automatic features the inexperienced ...

Page 38: ...ons d Optimizes the Reference Level coupling and the Bandwidth Sweep Time coupling e Activates the Terminated input and selects the 50 ohm IMPEDANCE setting f Initiates an internal test sequence and an Automatic Calibration Presetting does not destroy the trace that is stored in Trace Memory B and it does not erase the instrument state storage registers in which control settings may have previousl...

Page 39: ...ed The change in Center Frequency and or Resolution Bandwidth caused by pressing E Lfp initiates an Automatic Calibration THE BEEPER The 3585A communicates with the operator via alphanumeric messages that appear on the CRT screen To call the operator s attention to these messages it is equipped with an audi ble alerting device called the beeper which produces a gentle yet penetrating high pitched ...

Page 40: ...applied to the High Impedance input must not exceed 42 volts peak Activate Terminated input and select 500 or 750 dc coupled termination Also used to select 500 or 750 calibration impedance for dBm measurements at the High Impedance input Lights indicate that Terminated input is terminated in 500 or 750 and also indicate the calibration impedance Activates High Impedance input deactivates Terminat...

Page 41: ...I I t 1 000 000 0 ST 1 0 SEC t Sweep Time Hz Sweep Marker FreqUency Span Two digitally stored graphic traces read out of Trace Memories A and or B are written onto the CRT screen at a rapid flicker free rate Each trace is a point by point plot consisting of 1 001 equally spaced points connected by straight lines Trace Memory A containing the Current A or A B Trace is updated by the frequency sweep...

Page 42: ... Display Line appears on the OSPL L I NE CRT screen The Display Line amplitude can be adjusted with I 0 I 0 to measure the trace amplitude in dB relative to the Reference Level top graticule line d Measurement Data The Frequency Amplitude readout in the top right corner of the CRT screen displays the Marker Counter Manual or Offset frequency and amplitude or the Display Line amplitude depending on...

Page 43: ...isplays Current A or A B Trace stored in Trace Memory A Nondestructively transfers the Current Trace to Trace Memory B where it is safely kept until a different trace is stored or the instrument is turned off Displays trace that is stored in Trace Memory B Erases Trace Memory A Resets and automatically rearms Continuous sweep terminates Single sweep Subtracts B Trace from current A Trace and write...

Page 44: ...tries in the units that are the most convenient Entries that exceed the limits of a parameter or attempt to select unavailable settings are not accepted ENTRY ENTRY El1 8 ENTRY Step Keys The STEP keys increment Q or decre ment 2 the value of the prefaced parameter Each press of a STEP key produces a single step multiple step changes can be made without reprefacing Step sizes for all parameters exc...

Page 45: ...ee Operating Manual Auto Cal and beeper are automatically enabled by Instrument State Storage INSTR PRESE To save time when making a series of measurements requiring different control settings the SAVE key can be used to store the current operating parameters and states of the front panel functions in Register 1 2 or 3 The stored parameters and functions can then be recall ed at any time using the...

Page 46: ... Bandwidth Video Bandwidth Sweep Time b States of all front panel functions having LED indicators c Marker position d Display Line amplitude OFFSET e Offset reference frequency and amplitude whether or not iJ on Things That Are Not Saved a CRT traces b On states of momentary contact functions e g F I d Other RECAL I I on I Calibration disabled Beeper disabled Test modes Plotter functions e Preface...

Page 47: ...ing to RBW VBW and Frequency Span COUPLED RES The Gm function activates rr i deactivates r Li and optimizes the RBW VBW ST coupling Prevents the RBW and VBW from changing as a function of Frequency Span It also prevents RBW but not VBW from changing when the PRESET key is pressed Does not prevent Step or Numeric RBW VBW changes RES BW HOLD Restores optimum RBW VBW and Sweep Time settings If I 0 I ...

Page 48: ...onds Once the frequency parameters have been set the operator can freely adjust the RBW and or VBW settings to obtain the required resolution sensitivity and display smoothing With optimized Sweep Time coupling the Sweep Time is automatically adjusted to maintain the optimum sweep rate If desired the Sweep Time can be increased from the optimum setting to minimize the effects of sweep dynamics or ...

Page 49: ...e activated at a time It can be used with rED f REF LVL m Cf m t to position the tunable Marker for measurement of on screen responses to tune the Manual frequency to adjust the Reference Level to adjust the Center Frequency to adjust the Display Line amplitude See Operating Manual Chapter 8 for additional information MARKER ceNT I Nueus ENTRY MARKER COUNTER I 0 I I I 0 I f T i I OFf ON I i A IHi ...

Page 50: ...ion provides a direct real time reading of the rms random noise spectral density at the Marker or Manual frequency normalized to a 1 Hz noise power bandwidth All correction fac tors a re i n c l u d ed in the interna l n oise measurement routine Absolute noise level readings are displayed in dBm 1 Hz dBV 1 Hz or V Hz Relative Offset noise readings are displayed in dB 1 Hz Noise measurement times r...

Page 51: ... measure signal to noise ratio For example to measure the frequency and amplitude of a harmonic relative to the fun damental a b Set the Marker to the peak of the fundamental MARK 0 OFFSET response with I 0 I activate j 0 I and then press t Set the Marker to the peak of the harmonic r e s p o n s e w i t h 0 OFFSET reading o b s e rv e t h e Offset amplitude readings are displayed only in dB A sta...

Page 52: ...he Center Frequency point on the CRT trace To quickly move a response to the center of the screen set the Marker to the peak of the response with t f l 0 and then press f I Sets Reference Level equal to Marker amplitude To move a response to the top of the screen simply set the Marker to the peak of the response and press I J Sets Frequency Span equal to displayed Offset frequency Operates only wh...

Page 53: ...ep enabling a new sweep to be initiated by a sweep trigger MAN SWEEP ENTRY Selects Manual mode automatically activates I J sets Manual frequency IotANUAlJl equal to current Marker frequency prefaces Manual frequency enabling it to be changed by Step or Numeric Entry Trigger Functions G G G E X T TR I GGER Sweep automatically triggered after rearming Sweep internally triggered at power line frequen...

Page 54: ...T screen Returns the 3585A to Local and reenables all front panel functions An HP IB LOCALI Local Lockout will disable PAL until a remote Return To Local command is given or the LINE switch is turned off and then back on L I STEN o TALK o Pressing LocALI during an HP IB Local Lockout causes the beeper to sound and the message HP IB LOCAL LOCKOUT to appear on the CRT screen Lights to indicate that ...

Page 55: ...nstrument with the Hewlett Packard Interface Bus HP IB for remote operation Remote operation is described in the Operating Manual The OVEN REF OUT supplies a 10 MHz 1 x 10 7 per month sinusoidal frequency reference from an internal crystal oscillator located in a temperature controlled oven The output is ac coupled and the output impedance is 50 ohms The nominal output level is 10 dBm 50 ohms The ...

Page 56: ...85A s final IF filter The output signal is a 350 kHz nominal sine wave whose amplitude is linearily pro portional to the amplitude of the input signal component to which the 3585A is tuned The output is ac coupled and the output im pedance is approximately 450 ohms When the signal amplitude is equal to the Reference Level and the Reference Level is 10 dB to 56 dB relative to the Range setting the ...

Page 57: ...s proportional to the A Trace video amplitude on the CRT screen The Video Output is scaled to one volt per division and the nominal output level ranges from 10 0 Vdc at the Reference Level to 0 0 Vdc at ten divisions below the Reference Level The output resistance is 1 kilohm nominal The output is diode clamped to 15 Vdc and is internally fused at 62 mA N B The Video Output can be applied to an ex...

Page 58: ...the hp Model 13lOA Large Screen Display Output Level nominal OV to 1 Vdc Beam Off 0 5 Vdc Beam On 4 3 Vdc Output Resistance Protection nominal 1 kilohm diode clamped to 15 Vdc internally fused at 62 mA N B 47 ohms diode clamped to ground and 5 Vdc internally fused at 62 mA N B The Z output is strictly a beam off on function there is no intensity modulation ...

Page 59: ...B PLOTTER OUTPUT Z or pen down drive output supplies a polarized closure to ground outer shell through a silicon NPN tran sistor The output is TTL compatible and is also capable of directly driving penlift coils that require a closure to ground for pen down Pen Down Output 0 2 Vdc 225 mA into 42 Vdc maximum Pen Up Output 4 4 Vdc nominal The output is internally pulled up to 5 Vdc through an isola ...

Page 60: ...nts performance is tested or verified 4 3 PERFORMANCE TEST RECORD An Operational Verification Test Card is provided at the end of this section for your conve nience to record the performance of the 3585A during the Operational Verification Tests This card can be removed from the manual and used as a permanent record of the incoming inspection or of a routine performance verification The Operationa...

Page 61: ...hp 3 3 1 1 A See Note 3 Square Wave l OOns rise time dc Offset 1 V HP IB x hp 1 06 3 1 Interconnection Cables HP IB Interface Cable hp 9 8 2 5A Compatible x hp 98034A Impedance Matching Frequency 0 1 to 40 MHz x x hp 8 542B Network 5 00 to 7 50 VSWR 1 05 Minimum Loss Padl Mixer Double Frequency 0 1 40MHz x hp 1 0 534 Balanced See Note 3 Oscilloscope Vertical Scale 5 mV Div x hp 1 740A See Note 2 H...

Page 62: ... is to free the operator from the time consuming data gathering and documentation normally associated with Performance Tests Semi Automatic Performance Tests will check all of the specifications and do so in a much more detailed manner than the Operational Verification Tests The Semi Automatic Performance Tests give you a confidence level of 99 and take approximately 2 114 hours to complete The Se...

Page 63: ...nput Impedance Test 4 18 Marker Accuracy Test 4 19 Noise Test 4 20 Zero Response Test 4 21 Low Frequency Responses Test 4 22 Local Oscillator Sidebands Test 4 23 Residual Spurs Test 4 24 Harmonic Distortion Test 4 25 Intermodulation Distortion Test 4 26 Bandwidth Tests 4 27 Fractional N API Spur Test 4 28 Tracking Generator Flatness Test 4 29 HP IB Check Optional 4 30 4 8 Synthesizer Reference Con...

Page 64: ...T MANUAL ENTRY 9 MHz COUNTER on c Set the synthesizer controls for FREQUENCY 9 MHz AMPLITUDE 0 dBM d Using a BNC T connector connect 500 output of the synthesizer to the frequency counter and the 50 ohm input of the 3585A NOTE Be sure that the synthesizer and the 3585A are operating on their own internal references Disconnect any reference connection common to both instruments e Record the frequen...

Page 65: ...IV 1 dB CENTER FREQUENCY 100 kHz MANUAL SWEEP on b Set the synthesizer for FREQUENCY 100 kHz AMPLITUDE 25 dBm c Connect the 50n output of the synthesizer to the 50n input of the 3585A d The marker amplitude reading should be 25 dBm 0 25 dB to verify proper operation of the calibrator e Set the 3585A controls for OFFSET on ENTER OFFSET CENTER FREQUENCY 40 MHz f Set the synthesizer controls for FREQ...

Page 66: ...2 kHz 500 Hz 200 Hz 50 Hz 20 Hz 7 Hz Freq Test Limit 3 5 kHz 3 5 kHz 3 5 kHz 3 kHz 900 Hz 300 Hz 90 Hz 30 Hz 1 5 Hz Amplitude Test Limit 3 5 dB 3 5 d B 3 5 dB 3 5 dB 3 5 dB 3 5 dB 3 5 dB 3 5 dB 3 5 dB Equipment Required Frequency Synthesizer hp 3335A Procedure a Set the 3585A controls for RECALL 602 INSTRUMENT PRESET RES BW HOLD on CENTER FREQUENCY 10 MHz FREQUENCY SPAN 50 kHz REFERENCE LEVEL 22 d...

Page 67: ...uracy O 4dB for a 25dBm signal plus the Amplitude Linearity spec 0 3dB for a signal 5dB below the Reference Level Equipment Required Frequency Synthesizer hp 3335A Procedure a Set the 3585A controls for INSTRUMENT PRESET CENTER FREQUENCY 150 kHz REFERENCE LEVEL 20 dBm 1 dB DIV RES BW 10 Hz MANUAL SWEEP on REF LEVEL TRACK off b Set the synthesizer controls for FREQUENCY 150 kHz AMPLITUDE 25 dBm c C...

Page 68: ...output to the input of the attenuator Connect the output of the attenuator to the 500 input of the 3585A d Adjust the AMPLITUDE of the 3585A Tracking Generator so that the marker amlitude reads 0 dBm e Set the Variable Attenuator for one of the settings listed in Column A of the Amplitude Linearity Test portion of the Operational Verification Test Form f Add the Correction Factor Column B to the I...

Page 69: ...MPLITUDE INCR to dBm 90dB 1 5dB I c Connect the 500 output of the synthesizer to the 500 input of the 3585A d Using the Reference Level Accuracy Test portion of the Operational Verification Test Card enter the marker amplitude reading into Column C Subtract the value in Column C from that in Column A and enter this value in Column D The value in Column D should not exceed the Test Tolerance of Col...

Page 70: ... STOP FREQUENCY 40 1 MHz REFERENCE LEVEL 20 dBm dB DIV l dB REF LVL TRACK off RANGE 25 dBm VIDEO BW 300Hz b Press the SINGLE SWEEP button on the 3585A c Wait until the sweep is completed The trace you now see is the flatness of the 500 input d Move the marker to the center of the trace e Set the 3585A controls for OFFSET on and ENTER OFFSET f Using the marker find the point on the trace which give...

Page 71: ...equired 500 Feed Thru Termination hp 1 l048C Procedure a Set the 3585A controls for INSTRUMENT PRESET STOP FREQUENCY 1O MHz dB DIV l dB RANGE 0 dBm RES BW 3 kHz RES BW HOLD on RECALL 4 b Connect the 3585A Tracking Generator output to the 3585A 500 input c Adjust the Tracking Generator Amplitude control for the center of its range d Allow one complete sweep to occur Press the STORE A B key of the 3...

Page 72: ...erformance Test Card as the 1 MO unflatness for the 10 MHz to 40 MHz band The marker amplitude reading should be less than I S dB to verify the specification 4 1 7 Return Loss Tests These tests verify that the 3S8SA meets the Return Loss specification for the son 7S0 and Terminated inputs Specification Return Loss SOO or 7S0 Terminated Input 26 dB SOO or 7S0 Dummy Load 14 dB Optional Equipment Req...

Page 73: ... j 1 J J J J J _ 1 J m 0 0 0 0 0 o L J L J SYNTHES I ZER 11 50 HII OUTPUT FEEDTHRU TERM I NAT I ON OSC I LLOSCOPE Figure 4 1 500 Return Loss Test Operational Verification e Check the waveform amplitude displayed on the scope The amplitude displayed should equal 0 35 V p p Adjust the synthesizer as necessary to obtain this amplitude f Remove the shorting connection from the Load port of the Return ...

Page 74: ...eps e thru i for the values in parenthesis n Change the synthesizer frequency to 15 MHz o Set the 3585A controls for MANUAL SWEEP 15 MHz p Repeat Steps c thru m q This completes the Return Loss Tests Disconnect the test equipment 11 h p 3585A SPECTRUM ANALYZER 1iI j jjjj Ej 5 j J J 0 J J J J _L J J J iJ j J F l l l l l l e l l l l l l l l l l l m e o e o 0 0 0 0 L I SYNTHES I ZER 11 15 OHM OUTPUT ...

Page 75: ...ct the synthesizer output to the termination input c Set the synthesizer controls for FREQUENCY 1 kHz AMPLITUDE 0 dBm d Set the 3585A controls for OFFSET on Allow time for the marker reading to stablize then press the ENTER OFFSET button e Using short clip leads insert the 1 MO resistor between the output of the termination and the 3585A 1 MO input as shown in Figure 4 3 1M Ohm Input Impedance Tes...

Page 76: ...n 0 2 70 of frequency span Resolution Bandwidth Setting Procedure a Set the 3585A controls for INSTRUMENT PRESET b Set the synthesizer controls for FREQUENCY 20 8 MHz AMPLITUDE 25 dBm c Connect the 500 output of the synthesizer to the 500 input of the 3585A d Put the marker at the peak of the response shown on the 3585A CRT e The marker frequency should read between 20 00 MHz and 20 16 MHz thereby...

Page 77: ...NCE LEVEL 75 dBm RES BW 30 kHz VIDEO BW 30 Hz MANUAL SWEEP on c Read the marker amplitude Take an average of the readings displayed This average value should be below the test tolerance shown by the specifications listed d Record the average noise reading across from the BW displayed on the Operational Verification Test Card e Set the 3585A controls for RES BW 2JJ f Repeat Steps c thru e until all...

Page 78: ...s which may be picked up by the sensitive analog circuits These frequencies include 60 Hz Power Line 5 kHz AID clock 20 kHz approx Power Supply Switching Oscillator 25 kHz approx CRT High Voltage Oscillator 100 kHz Fractional N Clock 1 MHz Fractional N Step Loop Clock 10 MHz Internal Reference or other power line frequency These frequencies and their harmonics will be used to verify that all Low F...

Page 79: ...ic presently being measured g Repeat Steps e and f until the fifth harmonic of the frequency entered in Step c has been measured h Repeat Steps c thru g until all frequencies on the test card have been checked i Set the 3585A controls for INSTRUMENT PRESET CENTER FREQUENCY 20 kHz FREQUENCY SPAN 2 kHz AUTO RANGE off RANGE 25 dBm INPUT IMPEDANCE 1 MO j Connect a coaxial cable between the EXT TRIGGER...

Page 80: ... INSTRUMENT PRESET CENTER FREQUENCY 28 kHz FREQUENCY SPAN 15 kHz AUTO RANGE off RANGE 25 dBm INPUT IMPEDANCE 1 Mn u Disconnect the cable from the EXT TRIGGER input and hold the end of the cable on the CRT display You are now observing the CRT High Voltage Oscillator Frequency v Set the marker on the most positive point of the response w Repeat Steps I thru s 4 23 Local Oscillator Sidebands The OVE...

Page 81: ...itude Enter this number on the Opera tional Verification Test Card under the correct sideband frequency h Repeat Steps f and g two more times i Press the STEP UP key four times This puts the marker on the first upper sideband frequency 1 j Take an average reading of the marker amplitude Enter this number on the Opera tional Verification Test Card under the correct sideband harmonic frequency k Pre...

Page 82: ...rker reading when placed on the most positive point should be less than 120 dBm verifying that the 3585A meets its Residual Spur specification Record all resultant measurements on the test card 4 25 Harmonic Distortion This test verifies that the harmonic distortion produced by the 3585A is less than 80 dB below signal The filter shown for this test removes the harmonic distortion of the sources T...

Page 83: ...r CENTER FREQUENCY UP Read the marker amplitude and record it on the Performance Test Card i Repeat Step h until the fourth harmonic has been checked All values should be less than 80 dB verifying that the instrument meets its Harmonic Distortion specification j Disconnect the synthesizer and filter from the 3585A k Set the 3585A controls for OFFSET off RANGE 20 dBm REFERENCE LEVEL 20 dBm CENTER F...

Page 84: ...two signals 100 Hz apart at the input of the 3585A The second and third order IM products are then checked against the specification Specification Intermodulation Distortion For two signals each at least 6 dB below the RANGE setting and separated in frequency by at least 100 Hz referred to the larger in frequency of the two signals 80 dB except 2nd order IM with one or both of the input signals wi...

Page 85: ... the 500 input of the 3585A Set the attenuators for 0 dB of attenua tion See Figure 4 20 for the Summer Schematic S Y N T H E S I Z ER h p 3335 h p 3 585A SPECTRUM ANAL Y Z E R SYNTHES I ZER h p 3330 1 0OB STEP I dB STEP Figura 4 5 Intarmodulation Distortion Tast c Set the controls of synthesizer 1 for FREQUENCY 1 6 kHz AMPLITUDE 25 dBm d Set the controls of synthesizer 2 for FREQUENCY 1 7 kHz AMP...

Page 86: ...d be less than 80 dB to verify that the 3585A meets its Intermodulation Distortion specification j Move the marker until the offset frequency reads 200 Hz 1 Hz k The marker amplitude reading should be less than 80 dB to verify that the 3585A meets its Intermodulation Distortion specification 1 Set the 3585A controls for MARKER CF MANUAL SWEEP CLEAR A CENTER FREQUENCY 100 Hz m The marker reading is...

Page 87: ... specifica tions Specification Resolution Bandwidth Accuracy 3 dB Bandwidth 20 of BW setting at the 3dB points Selectivity Shape Factor 1 1 1 Procedure a Set the 3585A controls for RECALL 602 INSTRUMENT PRESET CENTER FREQUENCY 10 MHz FREQUENCY SPAN 10 Hz REFERENCE LEVEL 24 5 dBm dB DIV 1 dB RES BW 3 Hz RES BW HOLD on h Initially this test checks the 3 dB points of each Resolution Bandwidth therefo...

Page 88: ...The value obtained should be within 20070 of the chosen bandwidth j Record the OFFSET value in the 3 dB 60 dB column across from the appropriate bandwidth on the Operational Verification Test Card k Set the 3585A controls for OFFSET off RES BW FREQUENCY SPAN Next value on test card 1 Repeat Steps c thru k until all the 3 dB 60 dB all bandwidth measurements listed on the test card have been complet...

Page 89: ...ENCE LEVEL 30 dBm RANGE 0 dBm VIDEO BW 10 Hz b Set the synthesizer controls for FREQUENCY 37 648 955 Hz AMPLITUDE 10 dBm c Connect the 500 output of the synthesizer to the 500 input of the 3585A d Allow one complete sweep to occur e All points on the display should read less than 80 dB verifying that the 3585A passes this Fractional N API Spur test 4 29 Tracking Generator Flatness Test This test c...

Page 90: ...erator output to the 3585A 50n input d Adjust the Tracking Generator Amplitude control so that the displayed trace is in the middle of the CRT display e Turn the A B function on f Move the marker to the most negative point on the trace g Set the 3585A controls for OFFSET on ENTER OFFSET h Move the marker to the most positive point on the trace The marker amplitude should read less than 1 5 dB ther...

Page 91: ...P N 03585 10001 If an error is detected in the HP IB interface of the 3585A an error number will be printed out The error definitions are con tained in Table 4 2 and may be used to help locate problems on the 3585A HP IB board To run the HP IB check with the hp 9825A calculator insert the Semi Automatic Perfor mance Test tape in the calculator tape slot and press the following keys m When the lazy...

Page 92: ... R l g s b E RRII 2 7 r d s 7 1 1 A 2 8 r e d 7 1 1 9 5 29 O R i b ee p i e nt Ta l k Li g h t o n co nt i o f f 1 con t R i i f R 1 i g sb E RR 3 0 wr t 7 11 3 1 1c 1 7 i 1 0 8 3 2 0 R i b e eP i e nt L i s te n Li 9 h t on co n t i 0 f f 1 co n t 11 R i i f R 1 i 9 s b il E RR 3 3 r em 7 3 4 wr t 7 11 3 5 c 1 i 7 1 1 8 3 6 O R b e ep i e n t Remo t e Lig h t on co n t i o f f 1 co n t R i i f R ...

Page 93: ...THE CONTROLLER TO ANSWER THE D I S PLAYED QUEST I ON READ THE 3585 STATUS BYTE I NTO CONTROLLER VAR I ABL A D I SPLAY ON THE CONTROLLER TALK L I GHT ON CONT I NU E OFF I CONT I NUE ENTER A VALUE FOR VAR I ABLE R ON THE CONTROLLER TO ANSWER THE D I S PLAYED QUEST I ON D I SPLAY ON THE CONTROLLER L I STEN L I GHT ON a CONT I NUE OFF I CONT I NUE ENTER A VALUE FOR VAR I ABLE R ON THE CONTROLLER TO AN...

Page 94: ...the applicable instrume t Service Manual Table 4 4 Hp IB Address Switch Settings HP IB Listen Address Instrument IS Bit Decimal Code hp 3 5 8 5 A Spectrum Analyzer 1 1 hp 9 8 7 1 A Impact Printer Opt 0 1 1 hp 3 3 3 5A Frequency Synthesizer 5 hp 3330B Frequency Synthesizer 4 hp 3455A Digital Voltmeter 2 2 WAR N I N G I HP IB Address switches which require access to the interior of the instru ment s...

Page 95: ...atness 50 ohm no cal 1 0 Hz to 40 M 9 Flatness 1 M 20 Hz to 40 MHz 1 0 RETURN LOSS 1 1 Noise vs BANDWIDTH 1 2 1 M Input Noise open circuit 1 3 Marker Accuracy 1 4 Low Freq Response LO sidebands 1 5 Residual Spurs 1 6 Conv lnput Spurs and Image 1 7 IF Harmonic Distortion 1 8 Harmonic Distortion 1 9 IM Distortion 20 BW M EAS 2 1 Tracking Generator Flatness 2 2 Step IF Fraction N Spurs 2 3 API Spurs ...

Page 96: ...utions The included Semi Automatic Performance Test software is designed to be used with the calculator printer and frequency synthesizers listed under Recommended Test Equipment Table 4 6 Other HP IB compatible controllers and instruments may be used for the tests however the user must write his own software to be compatible with his particular equip ment Substitute test equipment must meet the c...

Page 97: ...reference connection com mon to both instruments e Record the frequency difference between the frequency counter and the 3585A counter reading Difference frequency equals Hz f The 3585A frequency accuracy is specified in terms of frequency drift therefore if the frequency accuracy derived from this test is not in accordance with your requirements turn to Section 5 of this manual for the Reference ...

Page 98: ...z AMPLITUDE 0 dBm c Connect the 500 termination to the 3585A 1 MO input Connect the synthesizer output to the termination input d Set the 3585A controls for OFFSET on Allow time for the marker reading to stablize and press the ENTER OFFSET button e Using short clip leads insert the 1 MO resistor between tne output of the termination and the 3585A 1 MO input as shown in Figure 4 9 f The 3585A marke...

Page 99: ...emain so for all of the performance tests unless otherwise noted Some test require special equipment and equipment set ups See Table 4 7 Equipment Set up for a reference Table 4 7 Equipment Set up Semi Automatic Performance Tests Equipment Set up Figure Numbar Master Test Set up Figure 4 1 0 Thermal Converter Output Calibration Figure 4 1 1 Measurement of Frequency Synthesizer for Calibration Data...

Page 100: ...S CABLE h p 3 3 3 5A FREO S Y N THES I ZER HP IB CABL NOTE Cabling is critical to meet distortion specification Use shortest possible cables Figure 4 1 D Semi Automatic Performance Test Equipment Set up POWER SUPPI Y D I G I TAL VOL TME TER I J I J2 R I 499 R2 MUST BE 0 1 5 RES I STOR JiI Figure 4 1 1 Thermal Converter Output Calibration Performance Tests h p 3455A THERMAL CONVERTER iI I85A iIiI 4...

Page 101: ... Synthesizer For Calibration Data h p 3 5 8 5 A S P E C T R U M ANAL Y Z E R J J J J J J J J J J J J J J J J J J r i J J J J J J J J J J J J J J J J J J J lJ O 0 0 0 0 O DO NOT USE A CABLE CONNECT RETURN LOSS BR I OGE TO I NPUT I OdB STEP OSC I L LATOR 11 I 2 k H z SQUARE WAVE DV TO I V Figure 4 1 3 5 0 ohm Return Loss Test Automatic Tests Model 3585A 11 ...

Page 102: ...1 Figure 4 1 4 75 ohm Return Loss Test Automatic Tests h p 3 5 8 5A SPECTRUM ANAL Y Z E R Qjjjjj J B J31 J J 0 J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J J 0 8 0 0 0 0 0 CD Performance Tests OSC I L LA T O R 11 I 2 k H z SQUARE WAVE OV TO I V OSC I L LATOR D O NOT USE A CABLE CONNECT RETURN LOSS BR I DGE D I RECTLY TO OUTPUT 11 Figure 4 1 5 Tracking...

Page 103: ... I DGE TO I NPUT I OdB STEP 75 OH FEE DTHRU TERM I N T I O M I N LOSS PAD 50 7 5 f i OHM OHM h p 3 5 8 5 A S P E C T R U M ANAL Y Z E R C J j jjjj Q u 8 J d J J 0 J J J J J J J J E J J J J J J J J J J J J J J J J J J J J J J J J J o CD 0 0 0 0 0 3 5B5A 1 9 DO NOT USE A ___ CABLE CONNECT RETURN LOSS BR I DGE TO I NPUT I OdB STEP 50 OHM FEEDTHRU TERM I NAT I ON 35B5A 20 Figure 4 1 6 Terminated Input...

Page 104: ...1 1 1 1 J 1 1 1 1 1 1 J 1 J J J J CD G 0 G o 0 0 0 o G 4 L J Lf J J 2 LOW PASS F I LTER SEE FIGURE 4 21 Figure 4 1 7 Harmonic Distortion Test S Y N T H E S I Z E R h p 3335 h p 3 585A SPECTRUM ANAL Y Z E R J3 I SUMMER 1 I SEE FIG 4 2ol JI lJ S Y N T H E S I Z E R h p 3330 1 0DB STEP I dB STEP Figure 4 1 B Intermodulation Distortion Test 4 45 ...

Page 105: ...t it on 7 d Turn the calculator printer synthesizer and spectrum analyzer power on e Load the supplied performance test cassette tape Part Number 03585 10001 into the cassette tape slot f Press 8 G on the calculator keyboard g Press jJ h After the run light has gone out press 8 on the calculator keyboard i From this point on the calculator will give instructions for what to do next The manual does...

Page 106: ...Using the Performance Test title or the previous test title go to Table 4 5 and find the file number for the program that you are trying to run d Enter these commands on the 9825A calculator 8 I 11808 8 File No From Step c U e Press RUN 4 4 1 Running Individual Semi Automatic Performance Tests To run one of the individual programs shown in Table 4 5 the following command sequence should be entered...

Page 107: ...racy optional Range Calibration Amplitude Linearity Ref Level Set Accuracy Flatness 50 ohm no cal 1 0Hz to 40M Flatness 1 M 20Hz to 40MHz RETU RN LOSS Noise vs BAN DWI DTH 1 M Input Noise open circuit Marker Accuracy Low Freq Response LO sidebands Residual Spurs Convllnput Spurs and I mage IF Harmonic Distortion armonic Distortion I M Distortion BW M EAS Tracking Generator Flatness Step IF Fractio...

Page 108: ... 9 9 C 3 430pf 5 300V 0 1 60 0 9 3 9 C 4 1 00pf 5 300V 0 1 60 2 204 C5 1 30pf 5 300V 0 1 40 0 9 8 5 L 1 2 1 H adjustable 1 0 9 1 00 3 3 1 2 Adjust L 1 and L2 until the approximate filter response shown below is acquired REF 5 0 dBm MARKER 9 000 000 0 Hz 1 0 dB D I Y RANGE 5 0 dBm 5 0 dBm J Vi CENT ER 20 000 000 0 Hz SPAN 40 000 000 0 Hz RBW 30 KHz YBW 30 KHz ST 2 SEC Approximate Filter Response Fi...

Page 109: ... kHz 500 Hz 200 Hz 50 Hz 20 Hz 7 Hz CAL OFFSET TEST 35B5A Offset 35B5A Frequency Frequency Amplitude Reading Test Limit Reading Hz 3 5 kHz __ dB Hz 3 5 kHz __ dB Hz 3 5 kHz __ dB Hz 3 kHz __ dB Hz 900 Hz Hz 300 Hz __ dB Hz 90 Hz __ dB Hz 30 Hz __ dB Hz 1 5 Hz __ dB RANGE CALIBRATION TEST Test Limit 7 dB Range 25 dBm 20 dBm 1 5 dBm 1 0 dBm 5 dBm o dBm 5 dBm 1 0 dBm 1 5 dBm 20 dBm 25 dBm 30 dBm Mark...

Page 110: ... 20 dBm 30 dBm 40 dBm 50 dBm 60 dBm 70 dBm 80 dBm REFERENCE LEVEL ACCURACY TESTS B C D 3585A 3585A Synthesizer Level Reference Marker Minus The 3585A Level Reading Marker Reading 1 0 dBm dBm o dBm dBm 1 0 dBm dBm 20 dBm dBm 30 dBm dBm 40 dBm dBm 50 dBm dBm 60 dBm dBm 70 dBm dBm 80 dBm dBm 50n FREQUENCY RESPONSE TEST Test Limit 5 dB Range 2 5 dBm 20 dBm 1 5 dBm 1 0 dBm 5 dBm o dBm 5 dBm 1 0 dBm 1 5...

Page 111: ...dB 0 7 dB 1 0 MHz to 40 MHz dB 1 5 dB RETURN LOSS TESTS Test Limit 1 7 5 mV p p Input 40 MHz 1 5 MHz Test Limit 500 Terminated 50 7 50 Terminated 7 5 1 MO INPUT IMPEDANCE TEST 1 7 5 mV 70 mV 1 7 5 mV 70 mV Frequency 3585A Reading Test Limit o kHz dB 5 56 to 6 44 dB 1 0 kHz dB 2 to 3 dB MARKER ACCURACY TEST Test Limit 0 2OJo Of Span Ideal Reading 3585A Reading Test Limit 20 08 MHz _ _ MHz 20 20 1 6...

Page 112: ...z dBm 1 27 1 0 Hz dBm 1 32 3 Hz dBm 1 37 ZERO RESPONSE TEST Test Limit 1 5 dB Below Range 3585A reading _____ dB LOW FREQUENCY RESPONSES Frequency 60 Hz 5 kHz 1 2 Harmonics 3 Fractional N Clock 1 00 kHz Step Loop Clock 1 MHz Internal Reference 1 0 MHz Power Supply CRT Oscillator Frequency Power Supply CRT Oscillator LOCAL OSCILLATOR SIDEBANDS Test Limit 80 dB Down From Signal 60 Hz 5 kHz 1 00 kHz ...

Page 113: ...dBm 1 4 7375 MHz dBm 9 5625 MHz dBm 37 2375 MHz dBm 32 0625 MHz dBm 9 72 MHz dBm 5 58 MHz dBm 2 7 7 2 MHz dBm HARMONIC DISTORTION TEST Test Limit 80 dB Down From Signal Fundamental Frequency 2 Harmonics 3 4 1 kHz 9 MHz _ dB _ dB _ dB _ dB _ dB _ dB INTERMODULATlON DISTORTION TEST 1 00 Hz Below 200 Hz Above Frequency Shown Frequency Shown 2F1 Fz 2Fz F1 dB dB dB dB 1 00 Hz Fz F1 __ dB __ dB 5 ...

Page 114: ...30 Hz 1 00 Hz Hz 30 Hz 6 Hz 500 Hz Hz 1 00 Hz 200 Hz Hz 1 00 Hz 20 Hz 2 KHz Hz 300 Hz 1 KHz Hz 300 Hz 60 Hz 5 KHz __ KHz 1 KHz 2 KHz __ KHz 1 KHz 200 Hz 20 KHz __ KHz 3 KHz 1 0 KHz __ KHz 3 KHz 600 Hz 50 KHz __ KHz 1 0 KHz 20 KHz __ KHz 1 0 KHz 2 KHz 1 00 KHz __ KHz 30 KHz 1 00 KHz __ KHz 30 KHz 6 KHz 500 KHz __ KHz FRACTIONAL N API SPUR TEST Maximum Point On Displayed Trace _ _ _ _ _ dB TRACKING ...

Page 115: ... Oscillator A8 1 5 8 A8 1 R2 8 1 Oven Output Shutdown 5 9 A8 1 R9 8 1 CRT Control and High Voltage 5 1 0 A67R46 R6 R 1 05 R 1 1 6 D 2 4 Power Supply A63 65 67 A 6 5 R 1 3 A 6 3 R 4 R 1 6 R38 CRT Graphics A64 67 5 1 1 A6 7 R 5 9 R8 5 R 54 R80 D 4 R3 R2 R 1 CRT Alphanumerics A64 5 1 2 A64R7 2 C23 R48 R62 D 3 R 1 4 R 1 6 R1 Fractional N A3 1 34 5 1 3 A34R32 A3 1 L3 8 4 5 A32R49 R56 L O Step Loop A23 ...

Page 116: ...justments A 1 7 5 3 1 A 1 7 C27 C37 C22 C28 A 3 C39 R26 R28 R30 R32 R34 1 6dB Amplifiers A 1 8 5 32 A 1 8R77 R7 1 R65 A 3 Conversion Section 5 33 A 2 C 3 L 7 L 8 L 1 1 L 1 2 A 2 A 3 L 1 L 3 L 5 L 7 C 8 A4L7 C2 C3 A5L1 6 T3 T4 Input Section 5 34 A 1 Calibrator Symmetry 5 35 A 1 R52 A 1 Flatness 5 36 A 1 R 1 3 1 C 8 3 L 1 8 C86 L 1 9 C89 L2 1 C92 Range Up Detector 5 37 A 1 R 1 73 Range Down Detector...

Page 117: ...iv Horizontal Range 50nsec div to 1 00msec div High Voltage Probe Accuracy s 1 hp 3440A K05 Input Impedance 1 09 Ohms Measurement Range 6kV Frequency Counter Frequency Range 1 0Hz to 1 50MHz hp 5382A Accuracy 1 count time base error Resolution 0 1 Hz Frequency Synthesizer Frequency Range 200Hz to 40MHz hp 3335A Amplitude Accuracy 0 27dB Attenuator 1 dB Step Attenuation Range 0 to 1 2dB hp 355C Acc...

Page 118: ...ments are needed we recommend that you perform all adjustments for any particular instrument section i e input LO IF There are three exceptions to this rule 1 The display section and 2 Oven Oscillator may be done independent of all other adjustments 3 the IF Filter adjustments are very time consuming and may be omitted if the instrument passes the Bandwidth Measurement Test The Final IF Adjustment...

Page 119: ...ower Supply Adjustment Locations A 7 5TP2 20kHz h Using a 10 1 probe connect an oscilloscope to A75TP2 Set the Oscilloscope controls as follows VERTICAL 0 2V Div HORIZONTAL 10psec Div INPUT DC coupled i Verify that the observed waveform is within 10OJo of that shown in Figure 5 2 Figure 5 2 Power Supply Clock Output 5 5 ...

Page 120: ...low to verify that the various power sup plies are working properly A74TP1 A73bTP1 A73aTP1 A71TP1 18V 0 9V 18V 0 9V 12V 0 6V 7 7V 0 6V r Disconnect the DVM Replace the PC board Hold down bar and the plastic cover for the power supplies This completes the Low Voltage Power Supply Adjustments 5 7 90MHz Reference Board Adjustments A21 NOTE The samefrequency counter and re ference should be usedfor al...

Page 121: ... on 7 dBm off 35dBm f Adjust A81R9 one eighth turn counter clockwise g Replace the jumper between the OVEN REF OUT and the EXT REF IN h Disconnect all inputs to the counter and the 3585A Connect the 3585A lOMHz Ref Output to the 3335 40 N Ref Input i This completes the Reference Oscillator Adjustments 5 9 1 DMHz Oven Oscillator Adjustments This adjustment sets the frequency of the 3585A oven oscil...

Page 122: ...requency counter from A2U Reconnect the proper cable to A2U h Set the synthesizer for FREQUENCY 9MHz AMPLITUDE OdBm i Set the 3585A controls for INSTRUMENT PRESET CENTER FREQUENCY 9MHz COUNTER on MANUAL SWEEP on j Using a BNC Tee connect the synthesizer output to the 3585A 500 input and the ex ternal Frequency Counter input k Adjust the fine frequency adjustment A8IR2 and the course frequency adju...

Page 123: ...tion and disconnect A67J6 e Set the oscilloscope controls for R3 VERTICAL 1VIDiv DC coupled HORIZONTAL lO s Div R 5 9 X and Y Inputs HI ei J J C C29 I I R60 R 86 RIOI lE 0 1 RIIZ RI IO I J IO xz R70 l CZ4 C35 I RI04 I Y o o a C45 R3 Q RI I 3 I N R I I I 33 e R67 Q31 I I Y I T i t J CZ5 RI03 PATTERN R65 R63 x 8 R98 R66 C49 Q I N Q24 C66 C51 Z7 C38 C33 C70 GND R8Z C5Z 25 C44 C54 R9Z R91 J7 XI CRZZ t...

Page 124: ...or Output h Turn the front panel intensity control fully off and verify that the A67TP1 output is 1 8V DC i Disconnect the scope probe j Connect a DVM 200V range to the l00V A67TP2 Adjust A67R38 for a reading of l00V 0 25V k Turn the 3585A power off Disconnect DVM WAR N I N G I The voltages present inside the high voltage power supply box can cause serious injury or death Never place an uninsulate...

Page 125: ...he High Voltage board A65 even when the instrument is turned of f Injury or death may result if an uninsulated tool or object is placed on the board tu r Ill n Connect the calibrated high voltage probe to A65TP l plated through hole in PC board WAR N I N G I 4kV will be measured when the instrument is turned on USE EX TREME CA UTION to avoid serious injury or death o Turn the 3585A power on p Adju...

Page 126: ... clock position t Adjust the focus limit pot A65RI3 for the smallest most symmetrical round dot on the 3585A CRT u Turn the 3585A power off Replace the high voltage cover and the instruments bottom cover Set the 3585A back in a normal upright position v Remove the shorts from the Xin and Yin inputs on the A67 board Reconnect the proper cables to these inputs w Move the test jumper A63J3 to the T p...

Page 127: ...AOO976 and greater will not have this adjustment bb Connect a 10 1 scope probe to A63TP3 and adjust A63R16 for a pulse width of 250 nsec between the centers of the rising and falling edges See Figure 5 10 NOTE If no pulse is observed on the oscilloscope move A63Jl to the HT position for a moment and then back to the HN position 90 Level 1 00 0 Level o to 70 nsec Figure 5 9 Display Processor Clock ...

Page 128: ...he reading V gg Connect the DVM to A67TP5 Record the reading V hh Subtract the reading in step ff from those taken in step gg The difference should be 8V or greater If the difference is less than 8V turn A67R6 slightly C C W and continue at step ff Typically the voltage difference will be 20V or greater NOTE When A67R6 is ad justedproperly the display will blank out when the front panel intensity ...

Page 129: ... DVM to A64TP8 Adjust A64R72 for 5 00Vdc OO5V Disconnect DVM c Move the test jumper A63J3 to the T position d The display should now appear roughly similar to Figure 5 12 foldout NOTE Re fer to Figure 5 12 and 5 13 foldout forpictures ofthe ef fect of each Graphic Ad justment e Adjust A67R59 X position A67R85 Y position A67R54 X gain and A67R80 Y gain so that the displayed pattern is vertically an...

Page 130: ...r and lower lines of the displayed pattern see Figure 5 12 r Replace the A67 board Replace the screws that hold the board to the chassis and the protective plastic cover over the board No Overshoot Of Vertical Line At This Point R e t r a c e L i n e A n d B o t t o m Line Should Be Straight Corners Do Nbt O v e r s h o o t Graticule Properly Adjusted CRT Display F o r L i n e Vertical Alignment W...

Page 131: ...n I Pattern Control A 6 7 R 3 X Gain A 6 7 R 54 Line Drawer Gain A64R 6 2 O rthogonality Control A67R2 V Position A67RB5 V Gain A67R BO X Alignment A 6 7 R 1 Overshoot U n dershoot Proper Adjustment X Position A 6 7 R 5 9 L i n e D rawer Offset A64R4B ...

Page 132: ... 2003 2005 X Gain A 6 7 R54 Y Position A 6 7 R 8 5 Overshoot Proper Adjustment line D rawer Offset A64R48 Overshoot Cond ition line Drawer Gain A64R 6 2 Y Gain A 6 7 R 8 0 Undershoot Figure 5 1 3 Graphics Adjustments 5 1 7 ...

Page 133: ...e f fect of Alphanumeric Ad justment Line Drawer Gain R 6 2 b Adjust A64R14 A OFS so that the second line of alphanumeric characters is about 114 of one character height above the top graticule line c Adjust A64R16 Y gain so that the third line of alphanumeric characters is 114 of one character height below the bottom graticule line d Adjust A64Rl X gain so that the last alphanumeric character is ...

Page 134: ...Model 3585A Adjustments Alpha Offset A64R1 4 V Gain A64R1 6 X Gain A64R1 Figure 5 1 5 CRT Alphanumeric Adjustments 5 19 ...

Page 135: ...ENT PRESET RES BW 3KHz RES BW HOLD on START FREQUENCY 0 4MHz STOP FREQUENCy 1 65MHz MANUAL ENTRy 0 4MHz f Connect the DVM to A3 1TP l and adjust A3 1 L3 for 7 70Vdc 0 05V 5 3Vdc O 05V R32 1 5 0Vdc O 8V UUU UUO UOOU UOOO OOU I N U I UI U4 U5 U6 1 5 0Vdc O 8V CI7 8 0 CI S J C 3 CI4 I I 8 I I v I UI8 I U9 I U I 2 I I I _ R2S_ U I4 I UI5 I I U IO R25 Cl 1 RI7 UI I I CRI I RIS L _ RI9 RIS 6 C9 R23 e CR...

Page 136: ...000000 35B5A 5 11 Figure 5 1 7 Fractional N VTD A3 j g Disconnect the DVM h Turn the 3585A power off Return the A3 1 board to its proper place in the card nest Turn the 3585A power on i Set the 3585A controls for RECALL 601 INSTRUMENT PRESET RES BW 3KHz MANUAL ENTRy IMHz CF STEP SIZE 500Hz MANUAL FREQUENCy Q j Verify that the MANUAL frequency reads I OOO 500Hz on the CRT display k Set your oscillo...

Page 137: ...f a Spectrum Analyzer is not available these steps may be omitted b Set the 3585A controls as follows RECALL 601 INSTRUMENT PRESET CENTER FREQUENCy OHz FREQUENCY SPAN OHz CF STEP SIZE 40MHz RES BW 3KHz RES BW HOLD ON c Disconnect the cable at A23J2 Connect a spectrum analyzer to A23J2 and verify that the signal 98MHz level is approximately 6dBm or greater typically 4dBm d Remove the test spectrum ...

Page 138: ...5A controls for MANUAL FREQUENCy CF STEP SIZE 50Hz MANUAL FREQUENCY Q p Verify that the MANUAL frequency now reads 1 000 050 Hz on the CRT display q Adjust A32R56 API2 see Figure 5 46 for a minimum amount of ripple on the scope waveform See Figure 5 1 8 r Disconnect the oscilloscope connections This completes the Fractional N adjustments 5 1 4 L O Step Loop Adjustments a Turn the 3585A power off P...

Page 139: ...2 The frequency reading should be 98MHz 10Hz n Enter Center Frequency JJ o The Frequency Counter reading should be 138MHz 10Hz p Disconnect the cable at A23Jl If the frequency counter now reads 144MHz 0 5MHz continue at step u q If the frequency counter reading is not within the limits of 144MHz 0 5MHz turn the 3585A power off Place the Step Phase Detector board A26 on a PC extender Turn the 3585A...

Page 140: ...trols for INSTRUMENT PRESET RES BW 3KHz SWEEP TIME 36 sec z Verify that the frequency counter is now changing in IMHz increments from 98MHz to 138MHz aa Reconnect the proper cable to A23J2 A23J2 to A25J3 This completes the L O Step Loop Adjustments 5 1 5 First L O VTO And Sum Loop Adjustments a Turn the 3585A power off Place the First L O VTO A22 on a PC extender board and turn the power back on b...

Page 141: ... N I I i If Figure 5 2 1 First LO VTO Board A22 c Connect a frequency counter to A2211 d Verify that the frequency counter now reads 100 35MHz e Using a DVM check that the voltage at A22TP1 measures 5 0Vdc O lV f Adjust the voltage at A22TP2 by squeezing or expanding oscillator coil A22Ll The voltage reading should be 2 0Vdc O lV Be sure to remove any tools from A22L1 before making your voltage re...

Page 142: ...0 1 probe q Set the 3585A controls for START FREQUENCy 0Hz STOP FREQUENCY 40MHz r Adjust A27R2 offset so that the waveform of the small band displayed on the scope varies less than 1 5OmVp p s Verify that the FRN and SUM lights on the A34 board are blinking t Verify that the SUM light on the A34 board stays on when the cable connected to A23J2 is removed u Reconnect the proper cable to A23J2 A23J2...

Page 143: ...U6 r 7T 7TT T fi IIn N U I a U I I O I I I fl I l a Y I 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 I o Figure 5 22 AID Converter Board A1 6 Reference Voltage R4 TP1 Q 1 tB n e I I I I I I U8 B e I Offset Adj R 7 jr R9 f 7f f R4 I I I I I I I I I B I i I I I I 0 B Offset Gain R9 U7 nr r n i f LJ UI I TP3 B B G 1 1 B I r U2 UI I 1 1 1 rl l 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Figure 5 23 Video Filter Board A1 5 Model...

Page 144: ...QUENCY SPAN 100KHz RES BW 30KHz dB DIV IdB MANUAL SWEEP on d Terminate the Tracking Generator output with a 500 feedthrough termination Using the BNC to Sealectro adapter cable connect the termination output to A17J1 e Adjust the Tracking Generator Amplitude control so that the peak of the trace is near the top of the screen f Turn the 3585A COUNTER on Once the Counter reading has stabilized press...

Page 145: ...ain Adj R 5 7 TP3 0 7 I I tQ Q I I I I I I I ION VCDIO Q CDID I I I J I J r69 CDCDCDCD 1010 0 IOfi Q 1 1 9 1 TPs e I I ii TPI 1 a a a C9 I I I elP3 30kHz Filter L7 30kHz Filter L5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Figure 5 24 Log Amp Board A1 4 j Set the 3S8SA controls for RECALL 601 INSTRUMENT PRESET CENTER FREQUENCY 3S0KHz RANGE 2SdBm AUTORANGE off REFERENCE LEVEL 28dBm dB DIV SdB MANUAL SWEEP on CL...

Page 146: ... R14 R21 R26 4 Replace the A14 board 5 Repeat until the required reading is obtained b Set the 3585A controls for RECALL 601 INSTRUMENT PRESET CENTER FREQUENCY 350KHz RANGE 30dBm REFERENCE LEVEL 27dBm dB DIV 5dB MANUAL SWEEP on Set the synthesizer controls for FREQUENCY 350KHz AMPLITUDE 20 0dBm c Connect the 500 output of the Synthesizer to a 10dB step attenuator Connect the out put of the attenua...

Page 147: ... attenuation n Adjust A14R17 for the correction factor calculated in step 1 o Repeat steps e thru n until the 3585A marker amplitude readings are 30dB O 05dB when the attenuator is set for 30dB and lOdB 0 02dB when the attenuator is set for 10dB p Set the attenuator for 0 dB of attenuation q Turn the 3585A OFFSET function off Table 5 3 Log Amplifier Adjustments A 8 C 0 E Variable Correction Ideal ...

Page 148: ...mplitude reading of 50 0dB O l dB Turn CCW for increase y Set the external attenuator for 20dB of attenuation z Adjust A14R14 for a 3585A marker amplitude reading of 70 0dB O l dB Turn CCW for decrease aa Set the external attenuator for 40dB of attenuation bb Adjust A14R21 for a 3585A marker amplitude reading of 90 0dB O l dB Turn CCW for decrease cc Set the external attenuator for 50dB of attenua...

Page 149: ... 27dBm c Using short clip leads short A14TP4 to ground d Set the 3585A controls for RECALL 601 INSTRUMENT PRESENT CENTER FREQUENCY 350KHz RANGE 30dBm REFERENCE LEVEL 25dBm SAVE 1 REFERENCE LEVEL 24dBm SAVE 2 e Using a DVM measure the dc voltage at AI5TP5 Record the voltage reading __V f Enter RECALL 1 on the 3585A keyboard g Measure the dc voltage at AI5TP5 Record the reading __V h Subtract the fi...

Page 150: ...s b Place the A19 board on a PC extender Restore power to the 3585A c Move the test jumper A1911 to the T position NOTE The component locatorsjor the IF boards A17 A19 are contain ed on Figure 5 34 d Set the synthesizer for a Frequency of 350KHz and an Amplitude of 2 0dBm e Remove the cable from the A1711 connector f Set the 3585A controls for RECALL 609 INSTRUMENT PRESET CENTER FREQUENCY 350KHz C...

Page 151: ...1 Set the 3585A controls for FREQUENCY SPAN 50KHz RES BW 300Hz SWEEP cont dB DIV 10dB B TRACE OFF m Move the marker to the peak of the trace and press MKR CF n Adjust Al9C41 so that the displayed trace is symmetrical about the marker o Using the STEP keys start narrowing the FREQUENCY SPAN As you narrow the span the peak of the response will move to the left or the right When this occurs move the ...

Page 152: ...he reference trace for the rest of the I F Filter adjustments 5 2 1 Fifth Crystal Stage Adjustment a DO NOT TURN THE 3585A POWER OFF Remove the PC extender and place the A19 board in the card nest b Make the following keyboard entries on the 3585A RES BW 300Hz RES BW HOLD on FREQUENCY SPAN 1KHz c Both the A and B traces should now be displayed as in Figure 5 27 REF 27 2 dBm MARKER 350 273 4 Hz 1 d...

Page 153: ...350 273 4 Hz RBW 300 Hz VBW 1 KHz SPAN 1 000 0 Hz ST 8 SEC Figure 5 28 Off Center IF Stage A a Mode e Set the 3585A controls for MARKER on A B on SWEEP cont dB DIV IdB f Adjust A19C67 so that the A trace approximates a straight horizontal line REF 27 2 dB MARKER 350 273 4 Hz 1 dB DIV RANGE 25 0 dB 62 dB v v CENTER 350 273 4 Hz RBW 300 Hz VBW 1 KHz SPAN 1 000 0 Hz ST 8 SEC Figure 5 29 Correctly Adj...

Page 154: ...E 25 0 dBm 28 5 dBm Ir I I V 0 r 0 0 0 0 0 0 0 V 0 0 7 CENTER 350 273 4 Hz RBW 300 Hz VBW 1 KHz SPAN 50 000 0 Hz ST 4 8 SEC Figure 5 31 Symmetrical IF Display 5 22 Fourth Crystal Stage Adjustment a DO NOT TURN THE 3585A POWER OFF Remove the A19 board Move test jumper A1911 to the OP position and test jumper A19J2 to the T position Reinstall A19 Board in instrument b Set the 3585A controls for FREQ...

Page 155: ...ition c Enter the following 3585A keyboard settings RES BW IKHz FREQUENCY SPAN 3 3KHz dB DIy IdB A B on d Adjust A19L5 so that the A trace approximates a straight horizontal line e Set the 3585A controls for A B off RES BW 30KHz OFFSET on f Allow a complete sweep to occur then press ENTER OFFSET REF 25 2 dBm OFFSET 0 Hz 1 dB OI V RANGE 25 0 dBm 00 dEI V i CENTER 350 289 6 Hz_ RBW 30 KHz VBW 30 KHz...

Page 156: ... that the A trace approximates a straight horizontal line d Set the 3585A controls for A B off RES BW 30KHz OFFSET on e Allow a complete sweep to occur then press ENTER OFFSET f Set the 3585A controls for a RES BW of 1KHz g Adjust A19R20 for a marker amplitude reading of OOdB h Move test jumper A19J4 to the OP position 5 25 Third Crystal Stage Adjustment a DO NOT TURN THE 3585A POWER OFF The store...

Page 157: ...fth Crystal Filter Adjustment This will re establish your reference trace You may then continue at the Third Crystal Stage Adjustment g Enter the following 3585A keyboard settings OFFSET off CF STEP SIZE 1 2Hz RES BW Q 2J RES BW 300Hz FREQUENCY SPAN 1KHz dB DIY ldB h Adjust A18L6 for the maximum possible marker amplitude reading i Enter the following 3585A keyboard setting A B on j Adjust A18L4 so...

Page 158: ...heck that the B trace is still intact The A trace may have glitches on it but this does not cause a problem If the B trace information is good procede with the adjustments If it has been lost or altered go back to the beginning of the I F Filter Adjustments and com plete all the adjustments up to the Fifth Crystal Stage Adjustment This will re establish your reference trace You may then continue a...

Page 159: ... B on c Adjust A17C70 so that the A trace approximates a straight horizontal line d Set the 3585A controls for A B off FREQUENCY SPAN 50KHz dB DIV 10dB e Adjust A17C29 for the best possible trace symmetry 5 29 Second LC Stage Adjustment a DO NOT TURN THE 3585A POWER OFF Remove the A17 board and place it on a PC extender Move test jumper A17J5 to the OP positon and test jumper A17J2 to the T positi...

Page 160: ...ntal line d Set the 3585A controls for A B off RES BW 30KHz OFFSET on e Allow a complete sweep to occur then enter ENTER OFFSET RES BW 1KHz f Adjust A17R12 for a marker amplitude reading of OOdB g Move test jumper A1713 to the OP position Check that all test jumpers on the A17 board are in the OP position h Turn the 3585A power off Remove the A17 board from the PC extender and replace it in the ca...

Page 161: ...djust A17C27 for the maximum possible marker amplitude reading Adjust the REF LEVEL as necessary to keep the marker below the top of the screen e Adjust A17C37 for the maximum possible marker amplitude reading f Set the 3585A controls for CF STEP SIZE 1 2Hz RES BW Ql g Adjust A18C22 for the maximum possible marker amplitude reading h Set the 3585A controls for CF STEP SIZE 1 3Hz RES BW Q i Adjust ...

Page 162: ...Generator output to a lOdES step attenuator Connect the lOdB step attenuator to a 1dB step attenuator and place a SOD termination on the output of the 1dB step attenuator Connect the output of the termination to the A1711 connector c Set the 3585A controls for RECALL 601 INSTRUMENT PRESET CENTER FREQUENCY 350KHz FREQUENCY SPAN 100KHz RES BW 10KHz dB DIV 2dB MANUAL SWEEP on RANGE 25dBm REFERENCE LE...

Page 163: ...dBm k Adjust A18R71 for an offset marker amplitude readilng of 32 00dBm 1 Set the external attenuators for 48dB of attenuation m Set the 3585A REFERENCE LEVEL to 76dBm n Adjust A18R65 for an offset marker amplitude reading of 48 00dB o Disconnect the Tracking Generator from A17J 1 Reconnect the cable from A6CJ1 to A17J 1 ...

Page 164: ...CI Q L UU L u uo a a u 1 1 I 1 1 1 RI IO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 eTP7 C61 A I AI5 A 1 7 C 2 2 Center Frequency XTAL Stage 3 R20 I nsertion Loss LC Stage 2 L6 Amplitude XTAL Stage 3 C 2 4 Symmetry Stage 3 _ _ _ _ _ _ _ _ _ _ _ _ _ _ l __ _ _ _ _ f _ _ _ C 8 3 Center Frequency X TA L Stage 3 c R65 I m l 1 1 1 cl J 1 05 _I l I 1 J 2 r R64 TP6e 1 1 a a a e L6 N C22 11 C24 C83 7 I 1 6 R67 I I I I...

Page 165: ...1 1 Qifli 8 6 HH 8 J1 8ID fX 1 I I ya I I I I I Cu I I J a a a a a a a a I I I If vln D I I I I _ Jfr D I I I I I I I I R23 tl rl tl71 irrm 3u J4 I I I I I J3 Tt 1 J XTAL Stage 5 Bypass LC Stage 4 Bypass LC Stage 5 Bypass I 1a 1l 4 a a a uu N CI2 B l I L_ l l o LQ R 1O I NRT3 1 I I I I I U8 I I I I I I I L5 I f I C4 I I L5 Center Frequency LC Stage 5 RIOI R 95 R28 R20 C61 TP4 u Center Frequency LC...

Page 166: ...ed as a support for the Input Conversion Section e Place the stack of books in the position shown in Figure 5 35 Be careful not to touch the high voltage section f Remove the seven screws which hold the Input Conv rsion Section in the instrument g Carefully remove the input section by moving it toward the rear of the instrument until the input connectors clear the front panel Ensure that the BNC c...

Page 167: ...he 750 Impedance key on the 3585 v The Ohmmeter should now read 750 20 w Press the IMO Impedance key This action terminates the input with a 750 load x The Ohmmeter should now read 750 20 This reading should be slightly different then the previous 750 reading y Set the 3585A controls for RECALL 601 INSTRUMENT PRESET MANUAL ENTRy 9MHz dB DIV IdB SAVE 1 z Set the synthesizer controls for FREQUENCy 9...

Page 168: ...a marker amplitude reading less than 95dBm gg Using RECALL I repeat step dd and using RECALL 2 repeat step ff Repeat until no further improvements can be made hh Set the 3585A controls for PRESET RBW VBW ST MANUAL FREQUENCY 9MHz RANGE OdBm dB DIV IdB CLEAR A ii Adjust the 350kHz filter using A5T3 and T4 Adjust for a maximum marker amplitude reading jj Move test jumper A2J5 to the TEST position kk ...

Page 169: ... ob tained If necessary adjust the Reference Level to keep th marker on screen uu Using RECALL 1 repeat step qq using RECAL 2 repeat step tt Repeat until no further improvements can be made NOTE Do not ad just A4C2 and C3 steps tt thru xx unless repairs have been made on the A4 board vv Using a 20 1 lKU resistive probe hp l0020A and a Spectrum Analyzer place the probe tip on the exposed portion of...

Page 170: ...Scans by ARTEKMEDI I 2003 2005 Book Placement Conversion Section In Position For Adjustment Figure 5 35 Removal Of The Input Conversion Section 5 55 5 56 ...

Page 171: ...t Conversion Sec tion turn the Input box on its side so that the bottom Input Section Al board is accessable see Figure 5 36 Figure 5 36 Input Conversion Box Positioning For Adjustment 5 35 Calibrator Symmetry Adjustment a Set the 3585A controls for RECALL 605 INSTRUMENT PRESET RANGE 25dBm AUTORANGE off CENTER FREQUENCY 20 IMHz b Remove the cable from All3 c Slowly replace the cable until a displa...

Page 172: ... is not atfault should you per form thefollowing steps f Using the results of the Calibrator Accuracy Test determine if the 40MHz point is higher or lower than the lOMHz point g Select a new Al C50 from the list below Choose a s maller value to raise the 40MHz point and a larger value to lower the 40MHz point This capacitor affects the Calibrator s frequency response above 20MHz Capacitor Value IO...

Page 173: ...Continuous Entry control adjust the REF LVL so that the trace is centered on the CRT d The 3585A is now in its 0 2dB DIV mode This allows very fine adjustment of the in struments flatness e Adjust the input flatness with the following components in the order shown A1R131 C83 L18 C86 L19 C89 L21 C92 The input flatness of the instrument should resemble Figure 5 39 when completely adjusted The effect...

Page 174: ... Model 3585A 5 60 REF 2 9 dBm MARKER 20 1 00 000 0 Hz 2 dB D I V RANGE 25 0 dBm 38 38 dBm 0 r CENTER 20 100 000 0 Hz SPAN 40 lOO 000 0 Hz RBW 30 KHz VBW 30 KHz ST 2 SEC Figure 5 39 Properly Adjusted Input Flatness ...

Page 175: ... ST 2 SEC L C86 REF 27 9 dBm MARKER 20 1 00 000 0 Hz 2 dB D I V RANGE 25 0 dBm 28 dB i o I V I 10 V I V CENTER 20 1 00 000 0 Hz SPAN 40 1 00 000 0 Hz RBW 30 KHz VBW 30 KHz ST 2 SEC REF 27 9 dBm MARKER 20 1 00 000 0 Hz 2 dB D I Y RANGE 25 0 dBm 1 64 dB J CENTER 20 1 00 000 0 Hz SPAN 40 1 00 000 0 Hz RBW 30 KHz YBW 30 KHz 5T 2 SEC L 1 9 J REF 27 9 dBm MARKER 20 1 00 000 0 Hz 2 dB D I V RANGE 25 0 dB...

Page 176: ...it Now adjust AIR173 so that the OVERLOAD light just goes out 5 38 Range Down Detector Adjustment a Set the 3585A to the OdBm RANGE b Set the synthesizer for an AMPLITUDE of 6dBm c Connect a dc voltmeter lOV range to the Digital motherboard pin A45B19 or A40TP2 L RNGD This is accessable from the bottom of the instrument as shown in Figure 5 41 A 7 6 W I I o GND TI 3 I ftNGU p 0 L D _ _ _ _ _ ltti_...

Page 177: ...1 on the 3585A 5 40 Calibrator Level Adjustment NOTE It is important that the amplitude accuracy of the source usedfor this ad justment is excellent The amplitude accuracy of the 3585A depends on the amplitude accuracy of this source a Set the 3585A control for INSTRUMENT PRESET RECALL 1 same settings as in top of Screen Amplitude Adjustments b Adjust AIR39 so that the marker amplitude reads exact...

Page 178: ...the Tracking Generator Amplitude control fully clockwise d Set the 3585A controls for INSTRUMENT PRESET IMO IMPEDANCE START FREQUENCy lkHz STOP FREQUENCy 100kHz RANGE 25dBm AUTORANGE off dB DIV 2dB e Move test jumper A15Wl to the TEST position f Using the Continuous Entry Control adjust the REF LVL so that the trace is centered on the display g Press STORE A B on the 3585A h Set the 3585A to the 5...

Page 179: ...N 99 000 0 Hz RBW 300 Hz VBW 1 KHz ST 2 2 SEC Properly Adjusted C2 1 REF 6 0 dBm MARKER 50 500 0 Hz 2 dB D I V RANGE 1 5 0 dBm 1 4 86 dBm f CENTE R 5 0 SOO O H z RBW 30 H z VBW 1 KHz SPAN 99 000 0 Hz ST 2 2 SEC Properly Adjusted C 2 7 Figure 5 42 1MO Low Frequency Flatmlss Adjustment 5 43 1 MO Input Capacitance Adjustment a Using the same connections as before set the external attenuator for 40dB ...

Page 180: ...dju itment Set Up c Set the 3585A controls for RANGE 25dBm START FREQUENCy 100Hz STOP FREQUENCY IMHz dB DIV IdB d Using the Continuous entry Control adjust the REF LVL so that the trace is centered on the display e Press the STORE A B key on the 3585A f Set the 3585A for a RANGE of 5dBm g Adjust the attenuator for 20dB h Adjust AIC18 so that the A trace overlaps the B trace as closely as possible ...

Page 181: ...minimum LO feedthrough Verify that the marker reads 5 15dBm 5 45 Electrical Isolation Test a Turn the 3585A power off b Carefully replace the Input Conversion Section in the 3585A mainframe Replace and tighten the seven mounting screws c Connect all the coaxial cables to the Input Conversion Section d Before connecting the power supply cable connect an ohmmett r between the 3585A frame and the scr...

Page 182: ...nerator Amplitude control fully dockwise to the detent position OdBm f Enter INSTRUMENT PRESET RANGE OdBm dB DIV IdB REFERENCE LEVEL 2dBm g Adjust A52C16 for the flattest amplitude response of the Tracking Generator output h Enter REFERENCE LEVEL 0dBm RECALL 4 1 Adjust A52R68 for a marker reading of OOdBm j Disconnect the cable connecting the Tracking Generator to the input This completes the Trac...

Page 183: ...9 see Figure 5 46 for the voltage stamped on A44U16 0 2V h Disconnect the DVM This completes the HP IB Adjustments 5 48 X Y Plotter Adjustment a Connect a DVM to A62TPl REF Set the DVM to the 20Vdc range Model 3585A b Adjust A62R4 see Figure 5 46 for a dc voltage reading of 1O 24Vdc 0 02V c Disconnect the DVM This completes the X Y Plotter Adjustments 5 70 ...

Page 184: ...PUT o I 0 I A4 SECOND IXER LZ 0 OL1 L3 0 Lll 1 0 35 Hz STDPBIIND PIISSBIIND 0 0 I nput Side A 1 I C I 8 INPUT CIIPIIC I TIINCE o ClI o lOclB IITTENUIITOR I Cl1 ZOdB ATTEMU TOR Z o o o o RI08 HIGH U PEOAHCE LEVEL IITCHING o R 1 1 D BIIIS OJUST 116B JI ORANGE TO 1150 Jl 9O Hz La INPUT I o o 0 0 OR 1 3 1 0 C9l C83 0 0 LlI 0 L18 0 C89 0 C86 L 1 9 o 0 FLIITNESS R173 0R17 RANGE UP RANGE DOWN THRESHOLD T...

Page 185: ...7 R 5 9 A 2 1 R 1 2 5 A 5 2 R6 8 A 6 7 R 3 A 6 7 R 2 A 6 7 R l A4 5 Test Switch 0 A44R 9 A 7 2 A 7 0 A 3 4 A 3 3 A 3 2 A 3 1 A 2 7 A 2 5 A 2 4 A 1 9 A 3 2 R49 API 1 A 3 2 R 5 6 API 2 A 1 5R4 A 1 4 R 2 6 A 1 4R 1 7 A 1 9C66 A 1 9C30 A 1 7C2 7 A 1 7 C 2 9 A 1 7 C 70 Figure 5 46 Top Of Instrument Adjustment Locations 5 73 5 74 ...

Page 186: ...tationary intermediate frequency IF filter and to sweep the input signal past the filter by mixing the input with a sweeping voltage controlled oscillator This process is exactly what the hp 3585A Spectrum Analyzer does 6 2 CIRCUITRY OVERVIEW Figure 6 1 is a circuit functional block diagram of the hp 3585A Spectrum Analyzer Each block shown represents a group of circuity known as a Service Group S...

Page 187: ... the display Finally the completely processed input signal is analog to digital AID converted and sent to the processor for processing and subsequent display 6 4 Local Oscillator 8G 8 The Local Oscillator section is centered around a very stable 10 MHz temperature controlled crystal oscillator reference and a Fractional N Synthesizer The synthesizer loop operation is a function of resolution bandw...

Page 188: ...s the signal that goes into the calibrator circuitry of the RF IF section The signal to the calibrator is either a 10 MHz reference signal or the Tracking Generator output 6 8 Hp IB SG F The instrument central processor is interfaced to the outside world via the HP IB section The HP IB section has its own processor and is directly connected to the instrument main processor via the IOD bus An HP IB...

Page 189: ...s selected on the front panel or via HP IB programming Attenuator selection is made in accordance with the range setting Attenuator control is from the processor via a series of opto isolators to the relay coils For example A Range set ting of 25 dBm removes all attenuators from the signal path A Range setting of 20 dBm at tenuates the input signal by 5 dBm In the 1 MO signal path the attenuators ...

Page 190: ...35 MHz second IF frequency is then ba ndpass filtered before going to the third mixer stage A 9 65 MHz notch filter eliminates any 9 65 MHz signal being generated by the second mixer stage The A5 Third Mixer board provides the final phase of conversion A 10 MHz LO signal enters the A5 board and is filtered and limited before reaching the final mixer The 10 MHz LO signal and the 10 35 MHz second IF...

Page 191: ...n This set of amplifiers and attenuators deter mine the reference level relative to the range To help in understanding the attenuator and amplifier operation on the A18 board consider the following RANGE REF LVL input signal 25 dBm This condition will result in the signal appearing at the top of the display screen Looking at the graph in Figure 6 2 you can see that there is 8 dB of attenuation swi...

Page 192: ...o the IF Output on the rear panel of the in strument and the ac log signal goes to the A46 Counter board 6 1 7 Video Filter lA1 5 The A15 Video Filter board performs three functions adds required dc offset provides video filtering and generates dB DIV amplification as needed Before discussing the circuitry of this board an explanation of dc offset is needed If you will recall the gain and attenuat...

Page 193: ...nverter uses a successive approximation technique for the conversion The out put of the AID converter is a lO bit approximation of the input analog signal to the AID converter The digital data goes to the A45 110 board and from there to the instrument central processor Each AID conversion cycle begins when the JADC initiate AID conversion line goes low Each conversion cycle takes approximately 200...

Page 194: ...wing Number CROSS REFERENCE Circuit Board Designator Schematic Drawing Number A 1 A2 A3 A4 A5 A 1 4 A 1 5 A 1 6 A 1 7 A 1 8 A 1 9 A 1 a A 1 b A 2 A 2 A 2 A 2 A 4 A 5 A 6 A 3a A 3b A 3c See Volume Two for schematic drawings Scans byART EKMEDIA ...

Page 195: ... 3 0KHz 0 0 I 2 LC 1 F I LTERS 0 Y TO T CONVERTOR l 3 1 0KHz 90MHz A2 l BUFFER O 4 3 l 2 dB SUFFER B d B j T F STEP 1 1 IITTENUATOR SWI TC4 CONTROL A 5 ITHIRD MIXER 1 0 35MHz 9 6 5MHz 1 T H I RD M I XER 350KHz Yl1 Y OMHZ HdB 1 0MHz A2 1 l BUFFER A 1 9 IF FILTER N o 2 O 4 8 l d B 1 OVERDRIVE ATTENUATOR o __ J _ __ _ _ _ f4J L O G AMPLIF I ER e B U F FE R TO COUNTER I vOLTAGE tA46 l AMPLIFIER TPl J ...

Page 196: ... V 1F STEP 1 6 dB 1 O 4 B l l d B 1 OVERDRIVE ATTENUATOR L INTER l 3 1 0 KHz V TO 1 2 XTAL l I TO V F I LTERS CONVERTOR 3 3 0 0H2 CONVERTOR l I J mE FILT ER I r G REFERENCE T P l I VlDEO TP3 BII __ _ 4__ L D C OFFSET DIA t FROM dB D I V AMPLIFIER TPS ATTENUATOR SIII TCH CONTROL BUFFER r l Xl _ _ _ VIDEO P EAK DETECTOR CONVERTER SAMPLE AND HOLD liD MS _ _ _ L _ TP _ _ _ _ _ _ _ __ J _ _ _ AID TO 1 ...

Page 197: ...tor operates in the single loop SL mode For all other resolution bandwidths the local oscillator operates in the multiple loop ML mode The reason for this is that there is more noise on the LO signal in the single loop mode and while this is allowable for the large resolution bandwidths it is too much noise for the smaller res9lution bandwidths The multiple loop is constructed such that the local ...

Page 198: ...more fully later For now think of FRAC N as a high resolution N PLL With these concepts in mind let s examine the block diagrams of the two operating modes of the local oscillator Single loop operation of the LO is shown in Figure 6 6 Single Loop Block Diagram As you can see it is fairly simple and conforms to the basic N type phase lock loop Again this simple loop is capable of generating all the...

Page 199: ...O output to form the dc tuning voltage to control the First LO VCO Figure 6 8 Multiple Loop Block Diagram detailed shows all the loops involved in greater detail The three PLL s shown in the two figures comprise three of the groups into which we will split the local oscillator Sum Loop Step Loop and Fractional N Loop The discussions that follow will be concerned with the three individual loops rat...

Page 200: ... _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ J r r PHA S E D E T E C T O R I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I F R C I N L O O P 2 0 0 N 3 5 0 S N S G O O F RA C N V C O 3 5 6 0 M H z D C CONTROL V O L T A G E F RA C N P HA S E D E T E C T O R 1 0 0 KHz I _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ...

Page 201: ...of the A22 board which is the first LO VCO during single loop operation A22 begins with an oscillator whose frequency is determined by the First LO VTO Tune In This tuning voltage determines the value of the vari caps which in turn determine the fre quency of the oscillation The oscillator output then goes through a gain amplifier approx imately 7 dB and through two buffers One output then goes to...

Page 202: ...ard in the Sum Loop The only difference is some biasing A23 is an oscillator gain amplifier and a pair of buffered outputs One output goes to the Sum Loop and the other goes to the next board in the Step Loop A26 Step Phase Detector The A26 Step Phase Detector board has three inputs One is from the A23 board 98 to 138 MHz a second from the A21 Reference board 90 MHz These two inputs are buf fered ...

Page 203: ...kHz at the phase detector input Figure 6 10 shows a PLL with a sample and hold circuit added The circuit operation is as follows 1 The phase detector comparator output is a current source which charges up the in tegrator s capacitor for a specific amount of time 2 The sample hold switch transfers the integrator voltage to the sample hold circuit 3 This voltage is stored on the sample hold capacito...

Page 204: ...CO OUTPUT D C CORRE C T I O N V O L TAGE PULSE REMOVE COMMAND B I A S CURRENT CONTROL 0 1 REfERENCE 1 0 0KH2 PHA S E COMPARATOR PH CURRENT 1 00KH7 REF l O OKH Z PHASE COMP INPUT yea FREQUENCY 45 025MHz N F 45 02 5 5 0 h O h 25 5 0 75 1 00 25 5 0 75 1 0 0 25 r nn mnnn V INTEGRATOR WAVEFORM SAMPLE HOLD 3585 6 10 A SINGLE VCO PULSE I S REMOVED AFTER EVERY FOUR CYCLES OF THE 1 00KHz REFERENC E 3585A 6...

Page 205: ... the overflow is used to con trol the pulse remove command Example Let the output frequency equal 40 04 MHz and the phase detector input is 100 kHz therefore the N fractional must be 40 04 MHz divided by 100 kHz or 400 4 Ph ase Accumulation Register 0000 4000 4000 4000 8000 4000 1 2000 4000 6000 4000 1 0000 4000 4000 initially set to zero first cycle 10 usec second cycle 20 usec third cycle 30 use...

Page 206: ... bias and API currents are summed and form the current that discharges C9 in the integrator ready ing it for the next phase detector current pulse The rest of this board is timing and switching for the various currents and the sample hold The Frac N VTO tune voltage from A32 enters A31 and is buffered gain 1 5 and then low pass filtered From this point the Frac N Error voltage goes to the Sum Loop...

Page 207: ...CROSS REFERENCE Circuit Board Designator Schematic Drawing Number A2 1 A 2 2 A 2 3 A 2 4 A 2 5 A26 A27 A28 A 3 1 A32 A33 A34 A 8 1 8 1 a 8 2a 8 3a 8 2 b 8 2c 8 3b 8 2d 8 2e 8 4a 8 4b 8 4c 8 5 8 1 6 See Volume Two for schematic drawings Scans byART EKMEDIA ...

Page 208: ..._ __ __ __ __ __ __ __ __ __ __ 1 l C iA45 tH I I rro n_ F R ACTI ONAL N FREC liNO CONTROL F RA C T I ONAL N L O O P L O C O N T R O L DC CONTROL VOLTAGt FRAC N CONTROL 1 1 IP I DATA I F I RST LO HO TUNE F RST L O VTii 1 S U M L O OP 1 0 0KHz FROM REF ERENCE 112 1 ____ J _ _ _ _ _ BUFFER T O F I RST tlIXER 11 2 A24 1FIRST LO BUFFER 1 BUFFER BUFFER BUFFER BUFFER T O TRACKING CENERATOR 0 5 SUr1 LOOP...

Page 209: ...NERATOR 52 SUH COOP MI XER I I BUFFER lIMP LOOP MODE 31 V T O AND OIVDERS I SUI1 l O OP OUTPUT 100 35 140 35HH2 SUM LOO P PHAS E D E T E C T O R L________ _ _ __ __ __ fR C I ERROR FIR3T LO V T O CaNTROl I SUI1 l O OP ERROR I I BUFFER L EVEL S H I F T ER DC 25 TO 3 I1H2 SL 0 2 0 I I ___ _ _ J 1 75 3MHzl fRAC N OUTPUT FRACT I O NAL N CONTROL L l N E S S I N G L E L O OP I1UL T IP L E L O OP ML MUL ...

Page 210: ...AM and transfer the required information through the central processor through the I O interface and to the Display Processor much faster than would normally be possible the entire process takes about 2 5 usec The A D interrupts the Central Processor and gives it information every 200 usec 5000 times second One final note of general information most of the buses in this section are Low True A41 is...

Page 211: ...Designator To Schematic Drawing Number CROSS REFERENCE Circuit Board Designator Schematic Drawing Number A 4 1 A 4 2 A 4 3 A 4 5 A 4 7 C 1 C 2 C 3 C 4 C 5 C 6 See Volume Two for schematic drawings Scans byARTEKMEDIA ...

Page 212: ...RO T E C T I O N STATU S L l G I N L R N G U I GA T I N G L m I f V I D E O f I L T E R AND L O CAL O S C L LA T O R C O N T R O L S I G NAL S LRN G D L T R I P mAC K I N G G E N ERA T O R AND I N PUT SE C T I O N C O N T R O L L I N E S ANAL O G T O D I G I TAL C O N V E R T ER DATA TRAC K I N G G E N ERAT OR AND I N P U T S E C T I ON DATA L l 003 L l RH L F L G C E N T RAL P R O C f S S O R 1 0...

Page 213: ... 1 00 BUS 1 0 STATUS BUS I I CENTRAL PROCESSOR U13 I r 1J I O STATUS BUFFER RESET _1 RESET CIRCUI TRY LDCLR rop 01 02 1 l DUAL PHASE 12MHz CLOCK I __ __ __ __ __ r SELF TEST CIRCUIT U18 16 12 lOA BUS IIEHORY CONTROL BUS I FOR I MEMORY CONTROt MH OUTPUT lRI STATE CONTROL lOA BUS r LOW I I ORDER 1 __ __ __ __ I DDRESS t l V LATCH L U33 34 r I ORDER 1 r I 6 LlNES ODRES 1 _ 1 _ _ _ __ _ __ __ _ __ 1 I...

Page 214: ...supply the appropriate control logic to the programmable amplifier on the A64 board is controlled by the line length controller This board also generates external plot ter controls control signals for sampling sweeping and ramping The A64 board is the Analog Display Driver This board takes the digital data from the A63 board and converts it into analog signals usable by the display Consider the gr...

Page 215: ...er supply pro vides voltage necessary for the deflection amplifiers The x axis and y axis amplifiers are identical A differiential circuit provides complementary outputs which are amplified to levels necessary for the CRT deflection plates Since the line intensity is controlled on the A64 board the z axis signal is an on off signal That is blanking occurs during retraces and between dots of the ma...

Page 216: ...Dasignator To Schematic Drawing Number CROSS REFERENCE Circuit Board Dasignator Schematic Drawing Number A 6 1 A63 A64 A65 A66 A67 0 1 0 2 0 3 0 4b 0 4b 0 4a See Volume Two for schematic drawings Scans byART EKMEDIA ...

Page 217: ...R E N C E A2 1 Scansby ARTEKIIED 2003 2005 A 5 1 1C L O CK G E N E RA T O R L I M I T ER f 1 0 I I 1 2 P L L I I 8 P L L J I 2 I I I I II I I 35 85 6 1 4 r r r 1 0 M H z A 4 6 1 2 M H z A 4 1 8 M H z A6 3 4 M H z A 4 4 ...

Page 218: ...I C S P RO C E S S I N G RAM P C O NT R O L I I I I f DAC I I RAM P G E N E RA T O R L I NE D RAW E R __ _SW I T C H lilll I I X D E F L E C T I O N A M P L I F I E R C RT I _ _ _ _ __ I _ _ _ Iv _ _ _ t n Y D E F L E C T I O N AM P l I F I E ij L V I A y I H I G H V O L TA G E 0 r H I GH VO L T A G E O S C I llAT O R MU L T I P L I ER Z B LANK AM P L I F I E R I Z B LA N K I I CO NTROL L l _ _ _ ...

Page 219: ...ion cycle the bits of the two DACs are set one at a time until the Tracking Generator is matched up with the IF peak A 100 circuit causes the actual fine tune signal path The DAC output voltages are summed to control the frequency of oscillation of the 10 35 MHz VCXO A 90 MHz signal from A21 and a 100 35 MHz signal from A52 are mixed to produce a 10 35 MHz signal The two 10 35 MHz signals are then...

Page 220: ...rcuit Board Designator To Schematic Drawing Number CROSS REFERENCE Circuit Board Designator Schematic Drawing Number A 5 1 A 5 2 A 5 3 E 1 E 2 E 2 See Volume Two for schematic drawings Scans byART EKMEDIA ...

Page 221: ...0 M H z 1 00 35MHz T RACKI NG GENERATOR AMPLITUDE ADJUST A53 1 1 0 0 35MHz VCO D C CONTROL ADJUSTED FOR CAL OFFSET IN CAL CYCLE FROM L O A24J4 1 0 0 35MHz U4 1 0 0 35 T O 1 40 35MHz 40MHz CURRENT L I H I T 0 4aMH 1 0MHz FROM REFERENCE A2 1 J3 HCAl ____ _ _ J 85 8 E 1 TRACKING GEN ERATOR OUTPUT TO CAL I BRATOR Al l Figure 6 15 Tracking Generator Block Diagram 6 37 6 38 ...

Page 222: ...uts The HP IB board communicates with the Central Processor using an interrupt scheme The Central Processor A41 controls the HP IB board by entering com mands through the command register TO C E N TRAL P R O C E S S O R f R O M 100 BUS DATA B U F F E R AND LATCH N O T E S C HEMAT I C DRAII I N G N U M B ER f O R T H E A44 B OARD I S f A N D CAN BE f O UND IN V O L U M E TIIO R O M S T A R T UP Fig...

Page 223: ...f data latches The remaining circuits on this board are for the control logic and for signal conditioning 3 5 0 KHz I F l O M H z R E F E R E N C E 4 I N P U T N O T E S C H E MA T I C DRAW I N G N U M B E R F O R T H E M6 B OARD I S C AND CAN B E F OU N D IN V O L U M E TWO F R OM 1 0 B OARD elK __ l ClR 24 B I T C O U N T E R DATA LAT C H E S LPSIID _ _ _ _ _ _ _ _ _ _ _ _ lsellD Figure 6 1 7 Co...

Page 224: ...ting a 10 bit cascade counter and therefore the X axis plotter output DWN X similarly decrements the counter LOAD X loads the counter causing an output that would move the pen to the far right CLR X resets the counter causing an output that would move the pen to the far left The output of the counter is converted to analog signal and is the low pass filtered A 6 2 B L O C K D I AG RAM 1 0 1 0 B I ...

Page 225: ...lete current cutoff and no power is dissipated by the device With this in mind it can be easily realized that any prolonged delay in switching between the two states will result in high power dissipation and failure of the device Therefore the switching drive current and voltages must be of the proper magnitude to assure complete state change of the switching regulator The drive signals to the swi...

Page 226: ...I NPU T C O M PARA T O R TURNS O F F I J C O M PARATOR W H E N GROU N D E D C O M PA RA T O R 5 V C U RRE N T L I M I T Y E L L O W 10 elK PR 5 V 5 V v V O L TA G E I N D I CA T O R T r GR E E N 17 85A 8 1 2 Figure 6 19 Switching Power Supply Block Diagram 6 47 6 48 Scans byARTEKMEDIA ...

Page 227: ...ic Drawing Number CROSS REFERENCE Circuit Board Designator Schematic Drawing Number A70 A7 1 A72 A 7 3 A 7 4 A 7 5 A 7 6 1 1 a I 2a I 2b I 2c I 2d 1 2a 1 2b 1 2c 1 2d 1 1 a 1 1 b See Volume Two for schematic drawings Scans byARTEKM EDIA ...

Page 228: ...z 3HHz I HL __ t f I 100 35HHz TO 140 35HHz _ _ _ __ _ __ _ __ J____ __ _ __ _ SL i i I I I DC CONTROL 98 TO 138HHz _ __ ______ _ S __ _________ __ _ __ _ __ _ ___ SUH LOOP ERROR r REFERENCE 1 1 i itI RE i 9 z j 8il 1 j 10HHz i CON I T _ Rg _ _ I tI I i F I L L I A3z I PRE TUNE I I L_______________ __________J STEP L OOP I 311 fRIIC N ERROR HL SL LOOP HOOE i i i I L_____________ J i r t O CONTROL ...

Page 229: ... _ I E NOI ONE I c o I o t _ _ i m M I HSLSCN I I i 8IAS CURRENT I SOURCE 25 TO 35 HHz L N LOOP r PROCESSOR 90HHz fROH r l1rl SG 8US l A451 f ARD l HAIN I I O TRACKING IOEN I JJ JJ B TO INPUT l f L____ J PROCESSOR r A44 A46 i 5l g ERTER L _ I I L__ COUNTER PLOTTER D J 1 J 63 j s G Hl SG G DISPLAY PROCESSOR HP I8 L _ r _ J CONNECTOR _ P 64 D s pLL Y ll Ig h I A61 1 I L DR VER _J CLOCK 80NlO 1 1 r 6...

Page 230: ... numbers listed above have no adjustments for the 2nd Mixer Board A 4 90MHz Filter Circuit Schematic Drawing 7 1 and Replaceable Parts Table 7 1 show the cir cuit and part differences respectively Schematics and parts tables are located at the end of this manual section 7 6 l2 IF FILTER CIRCUITS 7 7 Applicable Serial Numbers ___ and below 7 8 Affected Manual Areas IF Filter Adjustments Paragraphs ...

Page 231: ...o NOT turn the instrument power of f during IF Filter Ad just ment procedures To do so will cause the ad justment re ference to be lost The preliminary procedures must be performed prior to adjusting any IF stage a Turn the hp 3585A power off and remove the A l l A 12 and A 13 aluminum cover Place the A 13 Board on a PC Extender b Turn the hp 3585A power on c Place jumper A13J1 to the T position N...

Page 232: ...e and press MKR CF n Adjust Al 3C41 so that the trace is symmetrical about the marker Figure 7 1 Symmetry Adjustment A1 3C4 1 o Narrow the FREQUENCY SPAN to 10Hz by using the STEP keys As you narrow the span the peak of the trace will move to the left or right When this occurs move the marker to the peak of the trace and press the MKR CF key p Set the hp 3585A to dB DIV I dB SWEEP TIME 9 6 sec B T...

Page 233: ...e stored trace in B serves as a re f erence f or the remaining IF Filter Ad justments Do NOT turn the hp 3585A power of f unless told to do so NOTE Figures 7 3 and 7 4 will be re ferred to throughout the remaining I F Ad justment procedures out of adjustment properly adjusted Figure 7 3 Symmetry Adjustment out of adjustment properly adjusted Figure 7 4 Symmetry Adjustment Scans byARTEKMEDIA ...

Page 234: ...igure 7 5 Reference Level Set up c Set the hp 3585A to B TRACE off MARKER on A B on SWEEP cont dB DIV I dB d Adjust A13L7 so that the trace approximates a straight horizontal line See Figure 7 3 e Set the hp 3585A to A B off FREQUENCY 50kHz dB DIV lOdB f Adjust A1 3C41 so that the trace is symmetrical about the marker See Figure 7 4 g Place jumper A13Jl to the OP position 7 1 3 Fourth Crystal Stag...

Page 235: ...the OP position 7 14 Fifth LC Stage Adjustment A1 3 L5 and R28 a Place jumper A13J3 to the T position h Set the hp 3585A to RES BW l kHz FREQUENCY SPAN 3 3kHz dB DIV IdB A B on c Adjust A13L5 so that the trace approximates a straight horizontal line See Figure 7 3 d Set the hp 3585A to A B off RES BW 30kHz OFFSET on allow one complete sweep ENTER OFFSET RES BW lkHz e Adjust A13R28 for a OOdB marke...

Page 236: ...POWER OFF Remove the A 13 Board and the PC Extender Install the A 13 Board into the card nest 7 1 6 Third Crystal Stage Adjustment A 1 2 L6 L4 and C24 a DO NOT TURN POWER OFF Place th A 1 2 board on PC Extender NOTE I f the B trace has been lost or altered repeat the Preliminary Ad justment procedures to re establish the reference trace b Check that the B trace is still intact c Set the hp 3585A t...

Page 237: ...traight horizontal line See Figure 7 3 c Set the hp 3585A to A B off RES BW 30kHz OFFSET on allow one complete sweep ENTER OFFSET RES BW l kHz d Adjust A12R15 for a OOdB marker amplitude e DO NOT TURN POWER OFF Remove the A 12 Board and PC Extender Install the A 12 board into the card nest 7 1 8 Second Crystal Stage Adjustment A 1 1 L7 C39 and L8 a DO NOT TURN POWER OFF Place the A l l Board on a ...

Page 238: ...B DIy IdB FREQUENCY SPAN lkHz i Adjust Al lL8 for a maximum marker amplitude j Place jumper A I I J4 to the OP position 7 1 9 First Crystal Stage Adjustment IA 1 1 L6 and C29 a DO NOT TURN POWER OFF Place jumper AI IJ5 to the T position b Set the hp 3585A to FREQUENCY SPAN l kHz dB DIy IdB A B on c Adjust AI IL6 so that the trace approximates a straight horizontal line See Figure 7 3 d Set the hp ...

Page 239: ...z OFFSET on allow one complete sweep ENTER OFFSET RES BW l kHz e Adjust AI IR20 for a OOdB marker amplitude f Place jumper AI I J2 to the OP position 7 21 First LC Stage Adjustment IA 1 1 L4 and R1 2 a Place jumper A I I J3 to the T position b Set the hp 3585A to OFFSET off FREQUENCY SPAN 3 3kHz dB DIV IdB A B on c Adjust AI IJ4 so that the trace approximates a straight horizontal line See Figure ...

Page 240: ...PLITUDE 2 0dBm d Connect the synthesizer output through a 50n termination to AI lJl NOTE Disregard any calibration error messages e Turn the hp 3585A power on f Set the hp 3585A to RECALL 609 INSTRUMENT PRESET CF STEP SIZE 1 I Hz RES BW 3Hz MANUAL SWEEP on dB DIV IdB REF LEVEL 35dBm CLEAR A g Adjust AI IC27 for a maximum marker amplitude If necessary set the REF LEVEL so that the marker remains wi...

Page 241: ... for a OOdB marker reading s Set the hp 3585A to RES BW t Adjust AI IR30 for a 00dB marker reading u Set the hp 3585A to RES BW 2 v Adjust AI IR32 for a 00dB marker reading w Set the hp 3585A to RES BW 2 x Adjust AI IR34 for a 00dB marker reading y Disconnect the synthesizer from connector AI l J1 7 23 1 6dB Amplifier Adjustment a Connect the Tracking Generator output to a lOdB step attenuator Con...

Page 242: ... attenuators for 16dB of attenuation f Set the hp 3585A to REFERENCE LEVEL 44dBm g Adjust A12R77 for an offset marker amplitude of 16 00dBm h Set the external attenuators for 32dB of attenuations i Set the hp 3585A to REFERENCE LEVEL 60dBm j Adjust A12R71 for an offset marker amplitude of 32 00dBm k Set the external attenuators for 48dB of attenuation 1 Set the hp 3585A to REFERENCE LEVEL 76dBm m ...

Page 243: ...Description Code 0 1 60 369 1 1 C FXD 7 5 pF 1 00V 0 1 60 0 1 4 5 1 C FXD 8 2 pF 1 00V 0 1 60 0 9 5 2 1 C FXD 220 pF 300V none trace on circuit board none trace on circuit board I 9 0 M H z F I LTER Cl C2 PF Lt L _ 2 o _ 8 1 2 r r C3 220pF Drawing 7 1 A 1 90MHz Filter plo Schematic A 2 Scans byARTEKM EDIA Model 3585A Mfr Part Number ...

Page 244: ...2 I1 X 1 0 0 V D C C r R C A P A C I T O R _ F X D I IJF 8 0 2 0 l o o V DC C E R C A P A C I T O R F le D t U F t 8 0 2 0 l 1 0 l V O C C E R C A P A C I T O R Fle D 2 0 0 l F 5 3 0 0 V D C M I C A C A P A C I T O R r x n I U F 8 0 2 0 l O O V o C C E C A p A C I T O R ll x D I U F 8 o o x I ll o V D C C E R C A P A C I T O R _ F X D I U F 8 o 2 X O o J O C C E R C A P A C I T O R _ F X D I U F e...

Page 245: ... A N S I ST Q R N P N S I T O 8 P D a 3 b l l w T Fl A N S I S T O R N P N S I P O a l O O F T _ O O M H l T Fl A 1 8 I S T O R N P N S I P D 3 0 0 F T 2 n n z T R A N S I S T O R N P N S I P D 3 0 o F T 2 0 0 M H Z T R A N S I S T O R P N P S I T o e P O _ l t o lll T R HJ S I S T O R N P N S I P D _ l 5 0 v F T o r M Z T R A N S I S T O R N P N i I P O 3 5 n v ll F T J o u H Z T lr A N S I S T O...

Page 246: ... K 5 2 S w F e T C a _ 4 0 0 t O O RE S I S T O R 1 2 K s z s w F e T C a _ 4 O t 7 0 0 RE S I S T O R l O O 5x 5 W C T C a _ u O J t 5 0 0 R E S I S T O R 3 K 5 i 5 F C T C U O O t 7 11 0 R f S T S T O I K 5x 5 F e T C _ o O u t 8 0 0 R E S I S T U R b b l I X 1 5 F T C a O _ l o n R E I S T O R Q O Q K I X t 2 S w F T C O t _ I 0 0 R f S I S T O R QS 3 K I X I S F T C O t l 0 0 R E S I S T O R 3...

Page 247: ... 1 C 2 S F e T C 0 0 7 0 0 R F S I S T O P T R M R 5 1 1 0 C S I DE A D J I T R N R E S I S T O R b 1 1 1 I X 1 2 5 F T e O l o n Pf S I S T O 1 1 7 S X F C T C I I O 5 0 P E S I S T O R l O O S x S F C T C II tl O O 5 0 0 RE S I S T O R 4 7 5 X C F C T C 1 I 0 0 5 0 0 R E S I S T O 1 0 0 5 X S 1 I F e T C I I l 5 l R E S I S T O R 1 0 0 5 2 5 FC T C 1 I 0 0 5 n R E S S T O R l o o 5 p 5 FC TC 1 l...

Page 248: ...l n n V D C C E 2 b b S a C A P A C I T O P F le D I Ll F S O u X I O O V O C C E R b b 5 1 1 C A P A C J T O R F X Cl I Ll F 8 0 2 l X I C o V O C C E R 2 b b llj U C A P A C l T O P _ F X D I U II ll o o X l l o v D C C f R i b b S II C A P A C I T O R F X t U F 8 0 2 o x I O fJ V DC C E R 2 b b S U C A P A C I T O R F X O t U F e n 2 0 t I r n Y DC C E R 2 0 5 4 C A P A C I T O P _ x O I U F 8 ...

Page 249: ...N S I S T O R N P f T P D 3 0 F T a 2 0 MHZ R E S I S T O lol 7 3 8 5 U 1 2 S F T C a tl r R E S I S T l R 4 0 h I X 2 F T C O lS R E S I S T O R 2 Q l l U t 2S F T C a C 2 S R E S I S T O R 5 0 2 1 I t 2S F T C o l 5 R E S I S T O R 825 I 2 1i F T C a n I O O RE S I S T O P 1 3 1 I 1 2 S F T C u I O O RE S I S T D R 1 0 0 5 5 w F C T C a o n 5 0 0 R E S I S T O R 1 0 0 5 2 S F C T C 4 D O 5 u n R...

Page 250: ...O O 5 0 0 R S I S T O R 1 0 0 5 2 5 F e T C 4 0 0 5 0 0 E S I S T O P 1 0 0 5 2 5 0 1 F C T C 1 I 0 0 5 0 R E S I S T O R 2 7 K I t I C F T C 1 0 0 R E S I S T R l O O K 5 2 5 F C T e U o O O O R E S I S T O R 5 1 1 15 2 5 F e T C 4 0 0 7 0 0 R E S I S T O R I o n 5 S F e T C o O O S o o Rf S I S T O R 1 0 0 5 t S F C T C 4 n O 5 0 o R E S I S T O R 2 0 7 a t 2 5 v F T C _ O I O O RE S I S T N T R...

Page 251: ... I T C H F F T T L F F T H F F T T L F F T T L A N L G Q U A D 1 8 T 9 q A N L G Q U A D A N L G Q U A D A N L G Q U A D A N L G Q U A D w B T O _ Cl S T O 9 q R T l 9 Q A N L G J U A D A N L G Q U A D L S D T Y P E L S I T Y PE L9 D _ y P E L S O _ T V E F F T T L L S O _ T Y P E t b O I P P l b O I P P l b D I p P I b D I P l b O I P I b O I P I b D l O S _ E D G h T R I G P O S _ E DG E T R I G...

Page 252: ... V O C C E R 2 b 5 4 C A P A C I T O R _ F X D l lJ F O 2 0 X I O O V O C C F P 2 b b S 4 C A P A C I T O R _ F X D I U F 8 0 i 0 1 0 0 V O C C E R 2 b 0 5 1 1 C A P A C I T O R _ F X rJ I U F A O 2 0 X 1 0 l V D C C E R 2 b 5 4 C A P A C I T O R F X O 1 U F 8 n 2 0 x 1 0 0 V O C C E R 2 b b 5 4 C A A C I T J P F X D I UF 8 n o X 1 0 0 V D C C E R 2 b 0 5 4 C A P A C l T R _ F D 1 U F 8 0 O X 1 0 ...

Page 253: ... 2 5 vi F T C O l o 0 R E S I S T O w 31 1 0 a 1 2 5 F T C a Ci I O R E S I S T O R T R R I 1 0 C T O P A D J I T R N E S I S T O R 2 K I 1 2 5 F T C II O I O l R E S I S T O 3 3 1 5 2 S F C T C a u o 7 n o R E S r S T O R 1 0 0 5 2 5 1 1 F C T C a u o O I S n lj R e S I S T 1 t o O 5 I S fi F C T C a IJ O 1 I 5 o o R E S I S T O R 7 P I I X I 2 r 1 F T C _ o t n o R E S I S T O R J 5 71oC 1 1 2 5...

Page 254: ... R E S Y S T O P 1 0 0 S t 2 5 F C T C a IJ O O I O 1 R E S I S T O R 1 0 0 5 25 J F e T C l O t I 5 R E S I S T G 1 K 5 Il F C T C _ jJ 0 n I b I n 1 R E S I S T O R 4 7 0 1 5 5 F e T C a I CI 1 l Ii E S I S T n 3 K s 25 F e T C a II I1 7 1 O I P S I S T O R 4 1 0 5 5 F C T C a U O O b l l I P E S I S T O R 1 1 I X 1 2 5 011 F r C O I o O 1 R E S I S T O r b K S t 2 C w F C T C l I o n 7 1 0 R E ...

Page 255: ...C D e D R T T L a _ T o a L I N E I P I C F F T T L L 9 D T y p f P O S E DG E T R I G C O M I C S W I T C H A N L CI Q U A D t D I P P I C Sw I T C H A NI G Q U A D t D I P P I C H I T C H A N L G Q U A D l O I P P I C s w I T C H A N L G Q U A D t b O I P P I C S I i I T C H A L G Q U A D l b D l p P N O T A S S I G N f D P A P T O F A T C H E S E T S f E A l l P A R T S L I S T P U t T OF A T C...

Page 256: ...R3 R33 ID 1 1 1 ITI I I 1 r r r T I I 1 tI I I R38 tI C R9 tIC CI9 R24 Sl OH U tI CR4 J C53 f I RIO D A j I I R39 0 I I RI I 0 I f_c0 2r R4 O oo tI A I I C26 r l I I I RI8 ti f n al RI9 f I I C61 0U RI7 0 tI tI C54 I 1 I CI3 gk I U U C56 C C CID I oC CR5 R45 tI A tI r a Ol5l N CR6 R46 UIU1 tI N U1 Ou J I t CR7 R47 1 1 Cf I iT I I CR8 R48 0 11 G55 8 1 I I C22 R44 1 N C25 C30 O C50 C45 I m ti T _ b ...

Page 257: ... R l 0 3 j 0 4 K3 2K 5K 3K 1 5K U2e 1 0KHz C 3 1 f J IF INPUT 1 S V 3 1 SV 3 RB LEVEL 2 0 K 0 1 S l K Z80 VMS 15 V fOA FULL SCALE 1 5 V 3 C57 l u C5B D 1 U2A R93 R92 lK 1 K C65 0 1 FET SWITCH CONTROL r ADDRESS LATCH AND DECODE I F D m CXW S ooa 7 7 CRl S I D l Cl K 14 A S NC CLJ 10KHz D I U8 r I U7 4 NC D 5 3KHz CR14 D D rL l c 3Hz 1 4 Cl A 1I t NC D 15 1 0Hz 3 1 D lID 7 30Hz r i 0 LATa DATA it 10...

Page 258: ... Z D Q V l D D C 6 SECOND STAGEC59 4t U6C cz R96 tt Q LJ t R97 It 11 f J T 150pF CZ8 L7 C36 R61 C38 1 L8 C44 fR76 7 68pf lDVDC hH 14Dpf 68pF R73 loH 180pf 57 6K R86 CZ CRYSTAL A ____ _ C3 ysrAL OD lK CSD D l I C PDWER SUPPLY CD_ IoN 300Hz RZ6 b 15V 10K I R66 RZ5 lDK C15 0 1 1KHz 10KHz 13Hz 300Hz O tvDC RZ8 b R3D b 5K ZK RZ7 RZ9 100Hz 5 6K 30Hz ZK CRI C16 0 1 R35 IDO R36 100 CRZ R3Z b R34 ZK R31 ZK...

Page 259: ...g f R82 cb 1 I ii ii J I R_tt c 2 I C46 O u R98 I 1 800 I I I I R45 R41 X I I I I R97 t D I I Y I RS4 CI8 CR5 rt Q och R99 6 C5 I m RI 13 C68 J CRS R44 R40 I V oort C50 I I I U 0 1 0 D B CI7 CR4 1 I 0 I C52 6 D I I I U4 0 TPG R43 R39 X I I I I D I m Cl I R38 0 Z q C loY l J 0 I I R50 6 R37 I C RI4 mmmcbooPicb m I UI4 _ R1 14 C69 U5 6 R49 R35 t CRI3 f IITf z frO RI I t Y b RI08 I I p c J I I I I 4 ...

Page 260: ...81 R41 ZK R4Z 40Z l czo 1 R l tllCRS 4t 19cR7 R45 TnT nI J l _ oR TI I t MD 1 11 Lt lit CRYITAL It TMT TNEY Me lAm 1IlTM J eATIIII at 1 HI YAUD IIUI MY lE rAllIED 1I TMl CItYITAI 50KHz PATH V l L _ C58 tu 1 ZOK lK I 10 1f lI hC59 R S i l lK Id fillED I IIIN AlPLIf UIlt I 1 100 C7 i 20K _ 4 I DO 15Y RN IK nm l v 1 11 LATCH LMC 1 11 11 MC T _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ CRYSTAL IW SElECTDR__ __ ...

Page 261: ...0 1 l IY IK CSl 1 C51 1 rA A1 lo oTAIII LIIC NOTH ID r OJ51 5 lD ISV I 15 15 1 CI4 1 15Y C66 1 lSV CII 1 15Y4 C70 1 lIV cn 1 15Y C7 1 15 7 ClI 1 ISV A 3c RlOO CU lOO 1 15V OUTPUT 1Ulnll 15Y 15Y1 CIO 1 e GNO U I 4 U3 4 15 CZI 1 U 4 4 U I 4 US 4 15 ClS 1 UIO 4 U I I 4 U 2 8 15Y4 CI7 1 UI3 8 UI4 8 U 5 8 15 10 CU U 6 8 1 U 7 8 15 C71 1 15 C75 1 lV 5 V 1 5VI 03 lV2 13 1 lV 3 3 1 lV4 13 l5V I l 3 l5V S ...

Page 262: ...R9 RI I R69 C33 C27 C49 R2 c R68 RS C5Q R3 I RS7 R44 R 7 C51 R4 RS6 R45 R6 I I C62 RI02 R49 CR3 C5 I c _Rg2 t RS2 ID C 4 R47 R51 CR5 CRI 1 C25 R4S r R74 J 6 CRS c R9I I r RS4 C56 I R92 E _ _RC5 I J R C 12 0 C52 Ri I I C64 R90 C 4 J u R53 00 R9S C54 I I 0 R22 R5 3 g I 0 6 f I R56 I I RIS C32 R55 0 C66 R I7 V I I C61 RIS D J R62 l C34 CR7 8 C3 ffi 5 c r N I R64 R60 L3 R25 D C36 CR9 J u R2S R65 RSI C...

Page 263: ... HEWLETT CMRO C O P N Y OVERDRIVE TTENU TOR TPI C5 o R6 7 f J OdB 738 5 I dB R7 vf J 466 8dB 1D 1 11 vf J R8 29 12dB 15 14 V R9 502 7 hC 51 t0 1 h C50 t0 1 hC 9 to 1 C 8 to 1 R R3 RI R2 IK IK IK IK TCH F M TCHE r 14 r f 14 t f f P 11 I 1 QJ D D D D D U3 a D HEX Da LATCK la D I CUI J SYp 1 tU D D D UI D D Hl X I LA 14 14 D QJ 5V I I1K D D D U2 D I HEX 0 1 I DI urrtH 01 10 4dB 15 8d8 11 12dB f NC f ...

Page 264: ......

Page 265: ...ent First Mixer limiter circuit than shown in the main schematics of this manual Drawing 7 3 shows the limiter schematic and Table 7 3 shows the parts list for instruments with the above listed serial numbers Jii 1 L IHlTER 7 IIYDC R 4 160 t 4 C9 Rl R3 01 T ZZO ZZO 1 1 C l l 01 1 R9 C I 2 k3 RI I R I 9 4 _ R I 2 Lu J G RI8 R7 R I 6 R8 R I7 C I CI I L I L6 R8 lZ0 A2 0358 5 66 502 C R I o iR1S 47 C1...

Page 266: ...D 0 1 U F 8 0 2 0 1 0 0 V D C C E R 2 8 4 8 0 1 R E S I S T O R 2 2 0 5 2 5 W 0 1 1 2 1 1 R E S I S T O R 1 6 0 5 2 5 W 0 1 1 2 1 2 R E S I S T O R 4 7 5 2 5W 0 1 1 2 1 1 R E S I S T O R 3 3 5 2 5W 0 1 1 2 1 1 R E S I S T O R 1 2 0 5 5 W 0 1 1 2 1 1 R E S I S T O R 2 2 0 5 2 5 W 0 1 1 2 1 4 R E S I S T O R 1 0 0 5 2 5W 0 1 1 2 1 R E S I S T O R 1 K 5 2 5W 0 1 1 2 1 1 TRA N S I S T O R ARRAY S P E ...

Page 267: ...ble Parts Table 6 3 7 3 1 Description of Change Backdating Models with serial numbers listed above have several circuits different from the Phase Detec tor shown in the main schematics of this manual Drawing 7 4 shows the Phase Detector schematic and Table 7 4 shows the parts list for instruments with the above listed serial numbers 7 35 7 36 SCllns byARTEKMEDIA ...

Page 268: ..._ CR4 _ R I5 C 27 R I 4 Q _ C R2 _ C26 R2 3 R I O RI 9 R 3 2 L 7 C25 C2 9 R37 R 35 C 5 Q YI R9 L 3 8 R 31 R 3 0 RI 2 L 2 R I 3 R6 I _ i_ J 7 1 U 2 C 6 C 19 L I C 20 R27 R 24 C2 2 R 25 R28 i C 2 3 C 1 4 R 2 9 L l I R 53 C8 R4 R I R5 U I C I R7 R2 R 8 O D D 0 0 0 O D D 0 0 0 O D D A 5 1 0 3 5 8 5 66 5 5 1 C53 C 52 C 5 1 C 50 L6 C 1 8 C 2 U4 J III J 11 Scans byARTEKM EDIA ...

Page 269: ...__ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ O 1 5 V 1 I1 Z I L __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ 8 8 I i 10 L luH L _ 1 15V o r 5V L C3 1 o y 18V LCl 1 51 51 CIo 1 1C6 1 t i t 1 18V I K II U12 C13 1 fC50 I y 1 i w 33 p I kr c IC5 1 I L 6 15V i 1 100uH W 15V1 RB 4 02K RZ 69 8K 15V I 10 35HHz VcXO 15V Rl l r1 15K CR5 TP1 5V 7 TO 8VOt C9 CR4 R3 RZ...

Page 270: ... 51 K 0 ZV L D 1VP P 7 B5 B8 Jl C2B R33 O ZV R36 r 51 LIa5 1 1 3V L o zvp p 2 R40 33 R42 33 D ZV a6 U 3V C30 01 qf 01 51 11 v 0_ 1 1 11 V R34 O ZVP P o ZVP P R39 620 1 VI T 1978 BY HEwL nor pKtKMO tOHpA LB luH 1 51 R3B 620 VI C29 01 R s i 3 D Ul0 2 10 ZV 05VP P I R4B R47 R45 51 51 240 15n R37 J R49 330 15V2 4 7K R35 l3K 1 1 10 35HHz VcXO 15V Rll 15K CR5 C9 750pF C10 75pF Cl 5V R23 3 9K L5 R21 3uH ...

Page 271: ...0 o I OOE v v C 2 9PF t O X C Cl 5 I a5 8 v R a l O V 0 1 1 7 1 1 O l OOE v v C 2 QPF t O X C 1 C 2 S _ M I NaS B v R a o v 0 4 7 1 3 D I ODE s w I T C H I N G 3 0 V 5 0M 2 N S 00 15 2 8 1 1 8 0 C O N Nt C T OR RF 5MB M PC 5 0 O HM l 8 1 8 0 CO N N E C T OR R F 5MB M P C 5 0 OHM 2 8 4 8 0 C O I L M L O 1 0 0 U H 5X g a 5 0 1 550 X 1 7 5 L G _ N O M 2 8 4 8 0 3 C O I L M L O il lUH 5 X ga eto 1 5S ...

Page 272: ...5 1 5X 2 5 F C T C 0 0 1 5 0 0 R E S I S T O R 5 1 5 X 2 5 w F C T C 4 0 0 1 5 0 0 E S I 8T O R 1 3 0 5 1 l 5 Fe T C a 4 0 0 0 0 0 RE S I S T O R l 4 5X lSW F C T C 4 0 0 7 0 0 R E S I S T O R 4 7 K S X lSw F C T C 4 0 0 7 0 0 R E S I S T OR S I 5 X lS W F C T C 4 0 0 5 0 0 RE S I S T O R l K 5 X lS W F C T C 4 0 0 1 tl O O T A N SFO R M E R tI T UR N S C O NE C T O R SaL C O N T P I N 0 S I N 8 S...

Page 273: ...all numbered sticker on the crystal body This number corresponds with the XTAL Number column in Figure 8 A 3 4 d Select a crystal from the new set Using the sheet which you received with your crystal set find the listed value of resistance required for that crystal Table 8 A 3 5 lists the hp part numbers for the padding resistors used for the crystals Table 8 A 3 5 Crystal Padding Resistors Resist...

Page 274: ...value capacitor from the padding list see Table 8 A 3 7for symmetry capacitor padding lists Table 8 A 3 7 Symmetry Capactor Padding List Board Number Component Number Component Value hp Part Number A 1 1 C70 3 9pF 0 1 60 2247 5 1 pF 0 1 60 2 2 50 A 1 1 C7 1 5 1 pF 0 1 60 2 2 5 0 6 2 pF 0 1 60 2 2 5 2 7 5pF 0 1 60 2 2 54 A 1 2 C83 3 9pF 0 1 60 2247 5 1 pF 0 1 60 2 2 50 A 1 3 C66 C67 3 9 pF 0 1 60 2...

Page 275: ...anner by selecting the correct CF Step Size 1 2Hz for the A12 board 1 3Hz for the A13 board and the ap propriate jumper When you find the crystal stage whose Shape Factor is too large go to Table 8 A 3 8 and select the next smaller resistor from the padding list One resistor is used per stage per bandwidth to determine the bandwidth see Figure 8 A 3 5 3 0 0 H z tC E N T E R F R E O 1 41 T 0 3 H z ...

Page 276: ... R47 R60 R48 R61 8 6 6 k 3 2 4k 6 9 8 k 2k 402 90 9k 34k 7 5 k 2 1 k 4 2 2 9 5 3k 3 6 5 k 8 2 5 k 2 2 6 k 442 3 8 3k 2 4 3 k 4 6 4 4 8 7 5 1 1 Part Numbers for Padding Resistors Value Part No Value Part No Value Part No 402 0698 44 53 1 8 7 k 0698 44 2 9 9 09k 0 7 5 7 0 2 8 8 4 2 2 0698 3447 2k 0 7 5 7 0 2 8 3 1 0 2 k 0698 44 7 6 442 0698 3488 2 0 5 k 0698 44 3 1 2 1 5k 07 57 0 1 9 9 4 6 4 0698 00...

Page 277: ..._ _ _ _ _ _ _ _ _ _ _ _ _ _ 2 Hewlett Packard Instrument Serial No _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 3 Defective CRT Serial No __________Part No _ _ _ _ _ _ _ _ _ _ 4 Replacement New CRT Serial No _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 5 Please describe the failure and if possible show the trouble on the appropriate CRT face below 6 Is a warranty claim being made _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _...

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