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HP 3335A User's Manual

1. 3 3 PANEL FEATURES 3 4 Figure 3 2 illustrates and describes the function of all front and rear panel controls connectors and in dicators Items requiring additional description are referenced to paragraphs in the operating instructions 3 5 OPERATOR S MAINTENANCE 3 6 Operators maintenance of the hp Model 3335A Synthesizer Level Generator is limited to rear panel power line fuse replacement When replacing fuses always verify the replace ment fuse is of the correct amperage and is FAST BLO 3 7 POWER WARM UP 3 8 The Model 3335A Synthesizer Level Generator requires a pow r source of 100 120 220 or 240 V ac 5 10 48 to 66 Hz single phase The selection of line voltage and input power fuse is described in Section H Paragraph 2 5 PREPARATION FOR USE 3 9 The 3335A has a two position power switch STBY and ON It is important that the instrument remain con nected to the power source in the STBY mode when not in use This supplies power to the crystal oven maintaining a constant oven temperature thus eliminating the need for a long warm up period When the STBY mode is not used and power is disconnected from the instrument allow 30 minutes from the application of external power in the ON mode for the instrument to warm up INSTRUCTIONS 3 10 Modes of Operation 3 11 There are two manual modes of operation and an automatic sweep mode of operation for the Model 3335A Synthesizer Level Generator
2. HEWLETT PACKARD OPERATING AND SERVICE MANUAL 3335A SYNTHESIZER LEVEL GENERATOR Serial Numbers 1640400286 and Greater IMPORTANT NOTICE This ioase leaf mahual does not normally require a change sheet Ali major change information has been integrated into the manual by page revision in cases where only minor changes are required a change sheet may be supplied If the Serial Number of your instrument is lower than the one on this title page the manual contains revisions that do not apply to your instrument Backdating information given in the manual adapts it to earlier instruments Where practical backdating information is integrated into the text parts fist and schematic diagrams Backdating changes are denoted by a delta sign An open delta A or lettered delta Ag on a given page refers to the corresponding backdating note on that page Backdating changes not integrated into the manual are denoted by a numbered delta 44 which refers to the corresponding change in the Backdating section Section VII WARNING To prevent potential fire or shock hazard do not expose equipment to rain or moisture Manual Part Number 03335 90003 Microfiche Part Number 03335 90051 Copyright Hewlett Packard Company 1977 P O Box 301 Loveland Colorado 80537 U S A Printed August 1978 PACKARD O HEWLETT CERTIFICATION Hewlett Packard Company certifies that this produc
3. This HP IB command sets the attenuator to the straight through posi tion and the impedance to the 50 ohm mode A change of amplitude cannot be programmed but the digits 1 through 7 will introduce the attenuator pad corresponding to the AT line associated with the programmed digit ie programming the digit 4 causes the AT4 line to go low and introduce the 10 dB pad associated with line AT4 Pro gramming a O sets the attenuator straight through again once a pad has been introduced The digit 8 programs the 50 ohm output while the digit 9 programs the 75 ohm out put To return to normal amplitude control the code C CLEAR must be programmed to exit the special operating condition A summary of the T special operating codes and their function is shown in Table 3 6 3 85 The 3335A will respond to programming codes only when it is addressed to listen in the remote mode Front panel key instructions can be entered in any order desired by the programmer The function key instruction must pre face a data entry for that function An entry instruction must follow the data to complete programming of the func tion changing that particular operating parameter The key instruction sequence of a program is identical to the key activation sequence when operated manually Examples of program data messages using a 9830A and 9825A calculator 3 86 Examples illustrating complete programs using a 9830A and 9825A calculator to program various
4. FLAK 4 QUTPUT 1asta sigeas 5 END EXAMPLE 4 Programming a frequency to be entered from the calculator keyboard 9830A PROGRAM J Model 3335A 9825A PROGRAM 9825A PROGRAM 9825A PROGRAM 9825A PROGRAM Figure 3 4 9830A4 9825A Program Examples 3 16 Rev A Modej 3335A Section HI EXAMPLE 5 Programming an amplitude to be entered from the calculator keyboard 9830A PROGRAM 9825A PROGRAM Ls ent Hamelitude Cin dee aA CIH Tero ss ef fet ga RK Fb wt aes E K 13 CER EEG SOIREE EEEE NOTE The dBm programming code is used for both a negative and positive amplitude entry since the 3335A will recognize a negative sign entered by the calculator EXAMPLE 6 Programming a frequency sweep all parameters entered from the calculator keyboard 9830A PROGRAM 9825A PROGRAM F Le FORME i ei HoH eo 4 ALTEN i l SP O S T p i th ee SP iH HS i a TMPUT wis df fet EMD FORMAT ye Fep Laa IT LET teg WAIT T rE HEST F A PLUTERLT ciga gaapi 4 EHH NOTE if you prefer to enter center frequency and sweep width rather than start and stop fre quencies make the following changes to the respective fines of the Example 6 programs 98304 PROGRAM CHANGES 9825A PROGRAM CHANGES IW PHZ 1 Freauenigy Cir MHz ea A TR ARS et Widtir tim MHz oF rE Figure 3 4 9830A4 9825A Program Examples Cont d 3 17 Section IH EXAMPLE 7 Pr
5. t 0 40 dB 0 30 dB 0 70 dB 70 0 na 3 10 kHz 50 kHz 10 MHz Q gga Tt 0 60 dB 0 35dB Sea 7874 0 65 dB 0 40 dB a y t 1 1 dB t 0 85 dB 6 70 0 135 Q 5 10 kHz 2 MHz gt ah Te 0 35 dB a5 2 was 0 40 dB m Q porn 5 B t 0 85 dB 70 0 Output Balance 124 135 N 360 dB Levels to 88 74 dBm can be selected but accuracies are unspecified due to the spurious noise floor of 100 dBm 4a Section I Mode 3335A Tabie 1 1 Specifications Cont d OPTION 063 FREQUENCY Range 75 Q 200 Hz to 80 999 999 999 MHz 150 Q 10 kHz to 2 MHz Stability i Long Term 41x 107 per day 1x 107 per month See STANDARD OPTION 001 table for Option 001 stability Spectral Purity Harmonic Distortion All harmonically related signals will be less than the follow ing levels relative to the fundamental at full output Freg Range Harmonic Levei 200 Hz to 10 MHz 45 dB 10 MHz to 80 MHz 40 dB integrated Phase Noise 30 kHz Band excluding 1 Hz centered on the carrier 9 9 MHz lt 63 dB 20 MHz lt 70 dB 40 MHz lt 64 dB 80 MHz lt 58 dB Spurious 25 C 10 C impedance AH non harmonically related signals whichever is greater 759 125 dBm or 75 dBe 150 Q 100 dBm or 75 dBc AMPLITUDE Range 75 Q 150 Q 11 25 dBm to 88 74 dBm Absolute Level Accuracy Maximum Output at 100 kHz 10 C to 35 C 75 Q 0 05 dB 150 Q 0 10 dB Flatness rel
6. DATA c INCR d FREQUENCY 3 14 FUNCTION Keys 3 15 The FUNCTION keys control which operating para meter is displayed Within the FUNCTION group is a sub group called PRESET This subgroup controls ten storage S00 O OO OG ADUBE SSEG 4 amp BEWOTE POWER Switch A two position switch ON and STBY for controlling line power In the STBY position power is applied to the internal temperature stabilized crystal oven to maintain the operating temperature This eliminates the need for long warm up periods when the instrument is turned on Additionally unregulated 8 V is present on the Controller and Attenuator Driver Assemblies in the STBY mode LOCAL Switch Returns the instrument to local control when operated remotely and Local Lockout command has not been issued HP 1B Annunciators Indicates when the instrument is under remote control and if it is addressed to listen FUNCTION Keys Used to display a particular operating parameter or preface 4 data entry PRESET Keys Provide access to ten storage registers each capable of storing ail operating parameters of the FUNC TION group Annunciator Group 1 Indicates the operating parameter being displayed Annunciators consist of CENTER FREQUENCY SWP WIDTH AMPLITUDE and INCR DATA Keys Used to make data entries DATA ENTRY Keys Used to complete a data entry INCR Keys Used to initiate a frequency amplitude or phase increment Model 3335A regi
7. SWEEP OUTPUT located in the FREQUENCY group The output connectors provide the programmed output The SWEEP OUTPUT provides a de voltage between O and 2 V proportional to the sweep when the Synthesizer is in the sweep mode When not in the sweep mode the SWEEP OUTPUT is 1 V During the sweep the SWEEP OUTPUT is proportional to the frequency and can be used to drive the horizontal sweep of a plotter or an oscilloscope 3 58 Rear Panel BNC Connectors 3 59 40 N Input This is the input for the reference fre quency that essentially determines the frequency accuracy and stability of the hp 3335A As the name of the input suggests the reference frequency must be an integral sub multiple of 40 MHz ie 40 20 13 333 10 etc The 40 MHz master oscillator in the hp 3335A is phase locked to this signal Lock will occur with 40 N INPUT levels as low as 7 dBm When an external frequency reference is not used the 10 MHz REFerence OVEN OUTPUT is coupled to this input with the BNC to BNC adapter 3 60 10 MHz REFerence OVEN OUTPUT This is a refer ence frequency that is coupled to the 40 N INPUT when ever an externa frequency reference is not used When it is used its accuracy and stability determine the accuracy and stability of the hp 3335A output frequency The para meters of this output are described in Table 1 1 They depend on the Option selected 3 61 10 MHz OUTPUT This output is used to lock the phase of other synth
8. capability causes the display to flash indicating an illegal sweep A description of the keys and the sweep width display indicators follows KEYS SWEEP WIDTH Key Preface key for entering sweep width When pressed the front panel displays the present sweep width and the controller is enabled to accept new sweep width data DATA Keys These keys are used to enter the desired sweep width Model 3335A DATA ENTRY Keys Used to finalize the sweep width entry DISPLAY INDICATORS SWEEP WIDTH Indicator Indicates the front panel is dis playing the present sweep width or a sweep width entry ENTRY Indicator Indicates the display holds a sweep width entry not yet finalized by a data entry key The numeric display indicates the sweep width program med Example Program a sweep width of 580 34 kHz Display Result 580 34 kHz 3 49 Manual Frequency Tune 3 50 The frequency can be manually altered in the manual tune mode The frequency change is controlled by a front panel frequency knob The 3335A can be put in the manual tune mode by the MANUAL TUNE ON OFF key When the manual tune key is activated an annunciator above the key is illuminated 3 51 In addition to the ON OFF key the MANUAL TUNE controls include two digit keys a left arrow and a right arrow These keys are used to select the sensitivity of the manual tune knob When the manual tune mode is first activated the fourth digit from the right flashes The
9. is simply a copy of the first three sections of this manual This supplement should be kept with the instrument for use by the operator Additional copies of the Operating Information Supplement or the Operating and Service Manual can be ordered through your nearest Hewlett Packard Sales and Service Office a list of these offices is provided at the end of this manual The part numbers are listed on the title page of this manual 1 4 Also listed on the title page of this manual following the Operating and Service Manual and Operating Informa tion Supplement part numbers are Microfiche part numbers for these publications These numbers can be used to order 4 x 6 inch microfilm transparencies of these publications The Microfiche package includes the latest Manual Changes supplement and all pertinent Service Notes 1 5 The manual is divided into eight sections each covering a particular topic for the operating and service of the Synthesizer Level Generator The topics by section number are Section Topic General Information II Installation fil Operation IV Performance Tests V Adjustments VI Replacement Parts VII Manual Changes Vill Service 1 6 This section contains general information about the Model 3335A Synthesizer Level Generator The informa tion includes an instrument description specifications option and accessory information and instrument and manual identification 1 7 DESCRIPTION 1 8 The Model 3335A Sy
10. of 12500 Hz Display Result 12 500 0 Hz Display present frequency by pressing FREQUENCY FUNCTION key Display Result Present frequency is displayed NOTE This step can be omitted and the frequency incremented by pressing an INCR key even though FREQ INCR is displayed Section HI Increment the frequency by pressing the INCR down arrow Display Result Present frequency is decreased by 12 500 0 Hz Return to initial frequency by pressing the INCR up arrow Display Result Initial frequency is displayed NOTE If the front panel is displaying frequency incre ment it is not necessary to preface a frequency increment entry with the FREQ INCR key 3 30 Amplitude Entry 3 31 The 3335A Amplitude limits are determined by the output impedance selected In the standard instrument a 50 ohm or 75 ohm output impedance can be chosen With a 50 ohm output the amplitude range is 86 98 dBm to 13 01 dBm For a 75 ohm output the amplitude range is 88 74 dBm to 11 25 dBm Any amplitude within the range can be programmed with 0 01 dBm resolution For option 002 003 or 004 instrument amplitude ranges refer to Table 1 2 General Information 3 32 The desired output amplitude is programmed by activating the AMPLITUDE FUNCTION key DATA keys 0 through 9 and a DATA ENTRY key dBm or dBm A description of these keys and the amplitude display indi cators follows KEYS AMPLITUDE Key Preface key for entering amplitu
11. on this instrument be sure it is set for the line voltage of the power source Also ensure the line power cord is connected to a protective earth contact 2 9 Line voltage and fuse selection instructions are pro vided on the rear panel above the ac line connector The line voltage is selected by the position of the two rear panel line voltage selection switches NOTE The correct fuse rating for the line voltage selected is located on the rear panel between the fuse location and line voltage selection switch The line voltage and fuse are factory installed for 120 V operation WARNING o To maintain operator safety the following precautions must be followed before the instru ment power cable is connected a Before the power cable is connected to a power source the protective earth terminal of the instrument must be connected to earth ground This is accomplished by ensuring that the instrument s ac line input connector earth terminal is correctly connected to the instru ment s chassis and that the power cord ground conductor has continuity from end to end b Note that the protection provided by grounding the instrument cabinet will be lost if a power cable not containing a ground con ductor like the type supplied is used to connect the ac line voltage to the instrument c The power cable plug must be inserted into a socket outlet provided with a protective earth contact The protection of the grounded ins
12. para meters and functions of the 3335A are shown in Figure 3 4 3 87 Programming the Increment Functions Special attention to the programming of the amplitude frequency and phase increment functions is required because the same instruction ASCH character I for increment is used The increment parameter programmed depends on the instru ment s operating function prior to the I instruction If Mode 3335A the 3335A is in the frequency mode prior to the I instruction FREQ INCR is programmed if in the ampli tude function prior to the T instruction AMPTD INCR is programmed if in the phase mode INCR is programmed If the instrument is not in the frequency amplitude or phase mode an P instruction is ignored To ensure the increment is properly programmed in either frequency or amplitude it is recommended the increment instruction D be preceded by the amplitude or frequency function instruction A or F Section IH NOTE INCR can be programmed directly by the ASCH character P The instruction PI is legal but can be performed by just P to program INCR see Table 3 5 The two left most 9830A and 9825A examples in Figure 3 3 illustrate fre quency programmed immediately preceding the increment instruction P and an FI instruction is not required Table 3 6 Special Attenuator Program Codes AT AT6 ATS AT4 AT3 AT2 ATI ATG Code 40 dB 20 dB 20 dB 19 dB 4 dB 2dB 2d8 50
13. 2 75 Q T 1 1 1 1 1 1 1 1 G P E la a ee scat ah e e OF 2 S wm woo wos OF HOON AHAB WH a t Straight Through Pad Introduced Same As Previous State RE eat QS Rat Ow be ee H wk e ee ee 1 aE HH ff T omh m d d CZ oe id k x a ak a et we et ee RETURNS TO NORMAL AMPLITUDE OPERATION Table 3 7 Attenuation Actuated 50 Ohm Output Level Pads Attenuation Actuated dB 20 20 2 2 20 20 4 2 20 20 4 2 2 Pads Actuated d8 20 20 10 20 20 10 2 20 20 10 2 2 20 20 10 4 2 20 20 10 4 2 2 40 20 40 20 2 40 20 2 2 40 20 4 2 40 20 4 2 2 40 20 10 40 20 10 2 40 20 10 2 2 40 20 10 4 2 40 20 10 4 2 2 40 20 20 40 20 20 2 40 20 20 2 2 40 20 20 4 2 40 20 20 4 2 2 40 20 20 10 40 20 20 10 2 40 20 20 10 2 2 40 20 20 10 4 2 40 20 20 10 4 2 2 Rev A 3 14a Section IIT 3 88 Programming Amplitude to Maximize Attenuator Life The attenuator assembly of the 3335A introduces an attenuator pad by use of an electro mechanical mechanism As with any mechanical system the more it is used the greater the wear on the system A programmer can mini mize the mechanical wear on the 3335A attenuator by carefully selecting amplitudes which require minimum oper ation of the attenuator Table 3 7 indicates the 50 ohm out put level the attenuation introduced by the attenuator and which pads are actuated to accomp
14. 9 Hz with resolution of 0 001 Hz The desired output frequency is programmed by activating the FREQUENCY FUNCTION key DATA keys 0 through 9 and a DATA ENTRY key Hz kHz or MHz A description of these keys and the frequency display indicators follows NOTE For the following Operating Instructions refer to Figure 3 1 FREQUENCY Key Preface key for entering frequency When pressed the front panel displays the present output frequency and the controller is enabled to accept new fre quency data 3 4 Rev A Model 3335A DATA Keys These keys are used to enter the desired fre quency Notice that when data is entered the digits enter the display from right to left Holding a digit key down causes that digit to be entered respectively If a wrong digit is entered press the BACK SPACE key and the right most digit of the display the last digit entered will be deleted Continue with the correct entry DATA ENTRY Keys If an entry is completely in error the CLEAR key can be used to reset the display entry to zero The correct entry can then be made An entry is finalized by pressing one of the three range keys The display changes to indicate the new output frequency If an illegal entry has been finalized the output frequency does not change and the display flashes DISPLAY INDICATORS FREQUENCY Indicator Indicates the front panel is dis playing the output frequency or a frequency entry ENTRY Indicator Indicates the front
15. L levels and are low true The logic levels are Low digital ground or 0 V to 0 4 V de High open or 2 5 V de to 5 V de 3 67 isolation The 3335A is located from the HP IB by optical couplers The components located on the HP IB side of the optical couplers are powered by a separate 5 V power supply deriving power from an ungrounded secondary transformer winding This provides isolation of the instrument from the bus 3 68 Capability The capability of a device connected to the HP IB is specified by its interface functions The inter face functions of the 3335A are listed in Table 3 2 and indi cate the particular capability of that function as defined in Appendix C of IEEE Std 488 1975 The interface func tions indicate what activity a device will respond to or that which it is capable of initiating Each item indicating a device capability appears on the rear panel next to the HP IB connector 3 69 The instrument will recognize a preset listen address and accept bit parallel word byte serial ASCH coded data All data is received through the Data Input Output DIO lines of the HP IB The data transfer is con trolled by handshake lines DAV NRFD and NDAC Figure 3 2 illustrates the handshake sequence of events and describes each event during the transfer of data More detailed information is obtainable by ordering a copy of Condensed Description of the Hewlett Packard Interface Bus hp Pa
16. One manual mode is manual tune operation allowing the user to manually tune any fre quency in the 3335A s range The other manual mode is the manual sweep mode which allows the user to manually sweep the frequency between predetermined end points The automatic sweep mode allows the user to initiate a single sweep or a continuous sweeping output The auto matic sweep modes are remotely programmable through the HP IB 3 12 OPERATING INSTRUCTIONS 3 13 Operating the Model 3335A Synthesizer Level Generator requires programming the operating parameters by use of front panel keys These keys are contained in four major groupings From left to right across the front panel the groups are Table 3 1 Operating Information Index Operating item Paragraph Frequency Entry Frequency increment Entry Amplitude Entry Amplitude Increment Entry Phase Increment Entry Phase Phase Increment Displays Preset Entries Merging Data into a Preset Register Recalling Data from a Preset Register Display Last Entry Sweep Width Entry Manual Frequency Tune Sweep Mode HP IB Indicators and LOCAL Key Front Panel Output Connectors Rear Panel BNC Connectors Remote Programming HP 1B Remote Operation Changing the Listen Address HP IB Bus Commands Programming Programming the Increment Functions Unaddressed or Local Operation when connected to the HP IB Communications Features 3 1 Section IH a FUNCTION b
17. R WITH PIN 7 P O TWISTED PAIR WITH PIN 8 P O TWISTED PAIR WITH PIN 9 P O TWISTED PAIR WITH PIN 10 P O TWISTED PAIR WITH PIN 11 ISOLATED DIGITAL GROUND THESE PINS ARE INTERNALLY GROUNDED CAUTION The 3335A contains metric threaded HP 1B cable mounting studs as opposed to English threads Metric threaded hp 10631A B or C HP IB cable lockscrews must be used to secure the cable to the instrument Identification of the two types of mounting studs and lockscrews is made by their color English threaded fasteners are colored silver and metric threaded fasteners are colored black DO NOT mate silver and black fasteners to each other or the threads of either or both will be destroyed Metric threaded HP IB cable hard ware illustrations and part numbers follow LOCKSCREW 1390 03560 LONG MOUNTING STUD 0380 0643 SHORT MOUNTING STUD O380 0644 Figure 2 2 HP IB Connector 2 2 Rev A Mode 3335A designated 5 1 which are used to select the listen address Instructions for changing the listen address are provided in Section III of this manual along with 3335A programming codes 2 17 HP IB Descriptions 2 18 A description of the HP IB is provided in Section IH of this manual A study of this information is necessary if you are not familiar with the HP IB concept Additional information concerning the design criteria and operation of the bus is available in IEEE Standard 488 1975 titled IEEE Standard Digita
18. REF OVEN OUTPUT Connector Provides the out put from the temperature stabilized crystal oscillator it is coupled to the 40 N MHz INPUT connector item 24 to supply the reference signal when an external standard is not used EXT LEVEL INPUT Connector Provides a means of controli ing amplitude by use of an external amplitude reference LEVELING Switch Activates the EXT LEVEL INPUT when in the top position When in the INTERNAL LEVEL position leveling is controlied by the instrument TELECOMMUNICATIONS SWEEP Switch In Track posi tion alters the AUTO sweep by slowing it to 4 sec per step and blanking the amplitude during frequency changes Options 002 003 and 004 only Option 003 the frequency amplitude or phase whichever function is displayed by the increment parameter programmed from the FUNCTION group The key pressed determines the direction the increment is made 3 20 FREQUENCY Keys 3 21 The FREQUENCY keys are divided into two sub Rev A 3 3 Section HH groups MANUAL TUNE and SWEEP Below the MANUAL TUNE keys is a tuning knob When the MANUAL TUNE function is selected a flashing digit appears on the display The left and right arrow digit keys can be used to select any digit to be the flashing digit Turning the knob changes the frequency by the resolution of the flashing digit 3 22 The SWEEP subgroup allows the frequency to automatically sweep a programmed set of frequenc
19. TA ENTRY Key Used to initialize the phase increment entry If an increment is entered exceeding 360 degrees the display flashes when the ENTRY key is pressed DISPLAY INDICATORS INCR Indicator Indicates the front panel is displaying the present phase increment or a phase increment entry Model 3335A Indicator Indicates the phase difference introduced with respect to the initial phase of the present frequency This indicator appears when an INCR key is pressed when INCR is displayed ENTRY Indicator Indicates the display holds a phase incre ment entry not yet finalized by a data entry key The display indicates the phase increment programmed Example Program a phase increment of 45 0 degrees Display Result 45 0 deg Press the INCR up arrow two 2 times Display Result Display annunciator shows and display shows 90 0 deg NOTE If an INCR key is held the output is phase incremented continuously 3 37 Phase Phase Increment Displays 3 38 When the display indicates the difference intro duced by the phase increment and a new phase increment entry is made which is not prefaced by the INCR key the display automatically reverts to a INCR display The entry can be finalized like any other phase increment entry Therefore if the display is indicating phase a phase incre ment entry need not be prefaced by the INCR key 3 39 Preset Entries 3 40 All operating parameters of the FUNCTION gr
20. TART 6 i 107 71 47 FREQ START 10 SEC x 130 88 58 SINGLE START 50 SEC Y 131 89 59 SINGLE START AUTO z 132 90 5A STOP Q 121 31 51 sg 055 45 2D See Paragraph 3 81 T 124 84 54 3 14 Model 3335A These messages are composed of two parts the address command and the program information The address com mand contains the talk and listen addresses of the devices involved here the controller talk address and the 3335A listen address The program information contains the codes of the 3335A keys to be programmed Syntax of the address command portion of the data message is dependent on the controller used see manual of the system controller Syntax for the program information portion is comprised of the program codes listed in Table 3 5 3 83 Each programming code is a single 7 bit word or byte Table 3 5 lists each front panel key that is program mable and lists the programming code by ASCII character and corresponding octal decimal and hexidecimal equiva lant The last two entries of the table and T are codes programmable but do not represent front panel keys The _ allows for ease in programming amplitudes since nega tive amplitudes can be preceded by the minus sign and all amplitudes finalized with the dBm key K from the HP IB The character T is discussed in the following para graph 3 84 A special operating condition is obtainable by using the programming code ASCII character T
21. There must of course be a Model 3335A path from the calculator or other controller to every device operating on the bus As a practical matter avoid stacking more than three or four cables on any one connec tor If the stack gets too large the force on the stack pro duces great leverage which can damage the connector mounting Be sure that each connector is firmly screwed in place to keep it from working loose during use see CAUTION of Figure 2 2 2 14 Cable Length Restrictions To achieve design per formance with the HP IB proper voltage levels and timing relationships must be maintained If the system cable is too long the lines cannot be driven properly and the system will fail to perform Therefore when interconnecting an HP IB system it is important to observe the following rules a The total cable length for the system must be less than or equal to 20 meters 65 feet b The total cable length for the system must be less than or equal to 2 meters 6 feet times the total number of devices connected to the bus 2 15 3335A Listen Address 2 16 The 3335A contains a rear panel HP IB Instrument listen address selection switch There are five switches PIN LINE 1 DI91 2 DIG2 3 DIO3 4 D104 13 DIOS 14 DIG 15 DIO7 16 DIO8 5 EO 17 REN 6 DAV 7 NRFD 8 NDAC 9 IFC 10 SRQ 11 ATN 12 18 19 20 21 22 23 24 SHIELD CHASSIS GROUND P O TWISTED PAIR WITH PIN 6 P O TWISTED PAI
22. UAL 10 SEC and 50 SEC sweeps the sweep contains 1000 steps NOTE Whenever the hp 3335 sweeps through either 20 MHz or 40 MHz the amplitude of the output will drop severely for approximately 5 msec Other much less drastic amplitude discontinuities may be observed When the instrument sweeps through 10 MHz 14 MHz 28 MHz and 56 MHz KEYS GO TO START FREQ Key This key is used to display and output the starting frequency of the sweep The starting frequency is determined by the center frequency and the sweep width Half the sweep determined by the sweep width is below the center frequency establishing the start frequency START SINGLE 10 SEC Key This key is used to initiate a single sweep beginning at the start frequency below the center frequency The time for the sweep to go from start to finish is approximately 10 seconds and consists of 1000 steps When the sweep is in this mode an annunciator above the key is illuminated The sweep rate can be changed during the sweep by pressing the 50 SEC key or can be stopped by pressing the STOP key Pressing the AUTO key will put the sweep into auto sweep During any sweep depressing a key outside the frequency sweep group has no effect on operation START SINGLE 50 SEC Key This key is used to initiate a single sweep which requires approximately 50 seconds to complete and consists of 1000 steps START AUTO Key This key is used to initiate the sweep which sweeps continuously
23. VALENT i SAME AS THE 9830A APPLICATION Section IH NOTE The single sweep operating modes should not be used while the telecommunications sweep is implemented While the frequencies of the single sweeps are correct the amplitude is higher than the level displayed and somewhat unpredictable 9825A Calculator program data message to establish an auto gweep with SWEEP WIDTH of 1 5 kHz centered on 58 MHz OUTPUT START AUTO KEY TO BUS UNCLUOES THE UNLISTEN CMD AND CALCULATOR TALK ADDRESS THE GUTPUT CODE 7 CAN BE OTHER O1G TS MHz ENTRY KEY FREQUENCY ENTRY FREQUENCY FUNCTION kHz ENTRY KEY 32354 LISTEN ADDRESS DECIMAL EQUIVALENT won SWEEP WIDTH ENTRY SWEEP WIDTH FUNCTION 9825A Caiculator program data message to end sweep mode operation and reprogram frequency to 25 kHz amplitude to 9 dBm WRT 704 oben eek dBm ENTRY KEY ADDRESS eee momen AMPLITUDE ENTRY COMMANDS AMPLITUDE FUNCTION kHz ENTRY KEY wm FREQUENCY ENTRY rome FREQUENCY FUNCTION STOPS SWEEP MODE T OPERATION Figure 3 3 9830A 9825A Program Data Messages Rev A 3 15 Section HI EXAMPLE 1 Programming a fixed frequency e g 12 384 MHz 9830A PROGRAM SUES F 4G OUTPUT 131011024 Programming a fixed amplitude e g 40 01 dBm 9830A PROGRAM EXAMPLE 2 EXAMPLE 3 Programming a fixed frequency increment e g 4 kHz 9830A PROGRAM if FORMAT B 26 OUTFUT 13 18 Fees 30 EMD FUE
24. al to the frequency and can be used to drive the horizontal axis of a plotter or an oscilloscope When the instrument is not in the sweep mode the SWEEP OUTPUT is 1 V dc When GO TO START FREQ is pressed the instrument displays the start frequency of the sweep and the SWEEP OUTPUT is 0 V After a single sweep is complete and the upper limit is displayed the SWEEP OUTPUT is 2 V dc These points can be used to adjust the plotter end points DISPLAY INDICATORS NOTE In any sweep mode the frequency display is in hertz CENTER FREQUENCY Indicator Indicates the front panel is displaying the center frequency of the sweep When the frequency passes through the center frequency during a sweep the CENTER annunciator flashes SWEEPING Indicator Indicates the instrument is in the SWEEP mode If the instrument is not in an active single sweep or in auto sweep i e if it is in manual at start frequency or at the end of a single sweep pressing any key on the keyboard out of the sweep group will take the instrument out of the sweep mode Example Program the Synthesizer to sweep a 500 kHz band centered on 12 500 kHz Program the center frequency by programming a frequency of 12 500 kHz Display Result 12500 0 kHz Program the sweep width by pressing SWEEP WIDTH 500 kHz Display Result 500 0 kHz Check START FREQ by pressing GO TO START FREQ Display Result 12 250 000 0 Hz SWEEPING annunciator on Initiate a single 10
25. ative to 100 kHz Full Amplitude 75 Q 1 kHz 25 MHz 0 07 dB 200 Hz 80 MHz 0 15 dB 760 Q 10 kHz 2 MHz 0 18 dB Amplitude Accuracy includes the effects of flatness and attenuator 75 Q 200 Fiz 1 kHz 25 MHz 80 MHz 0 25 dB 0 15 dB amp 0 35 dB t 0 30 dB 0 20 dB 4 0 45 dB 41 25 8 74 759 Output Level dBm 48 74 0 40 dB 0 30 dB z 0 70 dB 88 74 10 kHz 2 MHz ie S 411 25 g 3 8 74 a see 0 85 0B Zo 7008 pa a Oo Levels to 88 74 dBm can he selected but accuracies are unspecified due to the spurious noise floor of 100 dBm 1 4b Model 3335A Section E Table 1 2 General Information Output Impedance Selected by a front panel switch Standard 50 ohms or 75 ohms Option 002 604 75 ohms unbalanced 124 ohms balanced and 135 ohms balanced Option 003 75 ohms unbalanced and 150 ohms batanced Frequency Range Standard 50 Q 200 Hz to 80 099 999 999 Hz 75 Q 200 Hz to 86 099 998 999 Hz Option 002 004 75 Q 200 Hz to 86 099 999 999 Hz 124 Q 10 kHz to 10 MHz 135 Q 10 kHz to 2 MHz Option 003 75 Q 200 Hz to 80 099 999 999 Hz 150 10 kHz to 2 MHz Frequency Resolution 0 001 Hz Frequency Display 17 digits Frequency Settling Time lt 20 msec to within 90 of final phase Frequency Sweep Mode Auto 8 sweeps sec 100 steps sweep Manual single 10 sec and 50 sec sweep 1000 steps sweep Amplitude Range Standard 50 ohms 13 01 dB
26. ceding paragraph The difference is the function key corresponding to the parameter to be merged is pressed prior to the register number key Several examples of merg ing data follow EXAMPLE Recall from the previous examples that all parameters in PRESET register 2 contain two s and those in PRESET register 3 contain three s Change the frequency in PRESET register 2 to 4 MHz and the amplitude increment of register 3 to 0 6 dBm by pres sing FREQUENCY 4 MHz STORE FREQUENCY 2 an and AMPTD INCR 0 6 dBm STORE AMPTD INCR 3 Verify these parameters have been merged by displaying each parameter after recalling registers 2 and 3 3 43 Recalling Data From a Preset Register 3 44 Any operating parameter stored in a PRESET register can be recalled individually without recalling the entire parameter set This allows the user to change an output 3 8 Model 3335A parameter by recalling only that parameter from one of the ten PRESET registers This is done like the merging of data The function key corresponding to the parameter to be recalled is pressed prior to the register number key Several examples of recalling a single parameter follow EXAMPLE Press RECALL 5 Display Result Display indicates a frequency of 1 MHz and all operating parameters are initial conditions Recall the frequency increment of PRESET register 2 by pressing RECALL FREQ INCR 2 Display Result Display indicates a frequency incremen
27. de When pressed the display indicates the present output amp litude and the controller is enabled to accept new ampli tude data DATA Keys These keys are used to enter the desired amp litude DATA ENTRY Keys Used to finalize the amplitude entry If an amplitude is programmed which exceeds the range of the instrument the output amplitude does not change and the display flashes DISPLAY INDICATORS AMPLITUDE Indicator Indicates the front panel is dis playing the present output amplitude or an amplitude entry ENTRY Indicator Indicates the display holds an amplitude entry not yet finalized by a data entry key The numeric display indicates the amplitude programmed 3 5 Section HI Example Program an amplitude of 23 45 dBm Display Result 23 45 dBm NOTE I It is normal to hear relay operation when the attenuator changes attenuator pads 2 If the front panel is displaying amplitude it is not necessary to preface and amplitude entry with the AMPLITUDE key 3 With a negative amplitude displayed depres sing the BACK SPACE key will cause an ENTRY preceded by a negative sign With this type of amplitude entry displayed the dBm and tdBm entry keys will both finalize a negative amplitude 3 33 Amplitude Increment Entry 3 34 Amplitude increment is used when it is desired to manually change the amplitude by specific increments The desired amplitude increment is programmed by activatin
28. ectrum Analyzer Spectrum Analyzer Wave Analyzer Amplifier Quartz Frequency Standard Universal Counter Power Meter Power Sensor 1 MHz LPF Synthesizer Power Supply 2 Cables 2 Cables 2 Cables Active Probe Table 1 3 Recommended Test Equipment Required Characteristics Frequency Range 1 kHz 1 25 GHz Amplitude Accuracy 6 dB Response 0 5 dB Frequency Range 5 Hz to 50 kHz Amplitude Accuracy 0 5 dB Response 3 Battery operation Frequency Range 15 Hz 50 kHz Accuracy 3 Hz Amplitude Range 150 dBm 30 dBm Accuracy 0 5 dB Recorder Output 0 5 V 2 5 Frequency Range 0 1 80 MHz Gain 20 dB 0 5 dB at 10 MHz Response 0 5 dB Noise Figure lt 5 dB Harmonic Distortion 32 dB for 0 dBm output Impedance 50 Q Output 5 MHz 1 V rms into 60 Q Short Term Stability 5 parts in 10 for 1 sec averaging time 12 Frequency 200 Hz 80 MHz Sensitivity 56 mV rms Impedance 1 MQ lt 50 pF Power Range 13 5 dB Frequency Range 100 kHz to 80 MHz Accuracy 0 05 Power Range 0 3 uW to 100 mW impedance 50 Qor 75 Q Freq Range 100 KHz 80 MHz Cut Off Freq 1 MHz Stopband Attn 50 dB by 4 MHz Stopband Freq 4 MHz 80 MHz Frequency Range 10 MHz 80 MHz Amplitude Range 10 dBm to 10 dBm Accuracy 0 05 dB Phase Noise 30 kHz Integrated 9 9 MHz lt 63 dB 20 MHz lt 70 dB 40 MHz lt 64 dB 80 MHz lt 58 dB Ou
29. erm 1 x 10 per day 1x 10 per month See STANDARD OPTION 001 table for Option 001 stability Spectral Purity Harmonic Distortion All harmonically related signals wil be less than the follow ing levels relative to the fundamental at full output 75 Q O dBm 124 Q 135 Q impedance Freq Range Harmonic Level 759 200 Hz to 10 MHz 45 dB 10 MHz to 80 MHz 40 dB 124 9 10 kHz to 10 MHz 45 dB 135 Q 10 kHz to 2 MHz 45 dB Integrated Phase Noise 30 kHz band excluding 1 Hz centered on the carrier 9 9 MHz lt 63 dB 20 MHz lt 70 dB 40 MHz lt 64d8 80 MHz lt 58 daB Spurious 25 C 10 C All non harmonically related signals Impedance whichever is greater 75 Q 425 dBm or 75 dBc 124 2 97 dBm or 75 dBc de to 260 MHz 135 0 100 dBm or 75 dBc dc to 10 MHz 68 dBm or 75 dBe 10 MHz 200 MHz AMPLITUBE Range 759 124 Q P 11 25 dBm to 88 74 dBm 135 Q Absolute Level Accuracy Maximum output at 100 kHz 10 C to 35 C 75 Q 2 0 05 dB 124 135 Q 0 1 dB Flatness Relative to 100 kHz Full Amplitude 759 1 kHz 25 MHz 07 dB 200 Hz 80 MHz 15 dB 124 Q 50 kHz 10 MHz 15dB 10 kHz 10 MHz 4dB 135 2 10 kHz 2 MHz 18 dB Amplitude Accuracy includes effects of flatness and attenuator 750 5 200 Hz 1 kHz 25 MHz 50 MHz 3 71 25 ele ae 0 25 dB 0 15 dB 0 35 dB ie gam 8 0 30 dB 0 20dB 0 45 dB at _439 74 E
30. es the option as either equipment or accessory For an equipment option the first digit is a zero and for an accessory option the first digit is a nine The following is a list of equipment and accessory options available with the 3335A Option Description 001 High stability crystal oven 10544A 002 75 Q Unbalanced Output Connector Com mercial equivalent of WECO type 477B Accepts WECO plug 358A 124 Q Balanced Output Connectors Com mercial equivalent of WECO type 477B Accepts WECO plug 372A 135 Q Balanced Output Connectors Com mercial equivalent of WECO type 223A Accepts WECO plug 241A 003 75 2 Unbalanced Output Connector BNC 150 Q Balanced Output Connectors BNC pair 004 75 Q Unbalanced Output Connector Com mercial equivalent of WECO type 560A Accepts WECO plug 439A or 440A 124 9 Balanced Output Connectors Com mercial equivalent of WECO type 562A Accepts WECO plug 443A 135 Q Balanced Output Connectors Com mercial equivalent of WECO type 223A Accepts WECO plug 241A 907 Front Handle Assembly 908 Rack Mount Flange Kit 909 Rack Mount Flange Kit Front Handle Assembly 910 Additional Operating and Service Manual 1 18 For more information concerning these options refer to Table 1 2 General Information or contact your local hp Sales and Service Office A list of the hp Sales and Service Offices is provided at the end of this manual 1 19 ACCESSORIES SUPPLIED 1 20 The following is a li
31. esizers to the phase of the hp 3335A Its output level and output impedance are typically around 0 dBm and 50 ohms 3 62 EXTernal LEVEL INPUT This input is selected using the INTERNAL LEVEL EXT LEVEL INPUT switch located on the rear panel When it is selected the dc level on this input determines the output amplitude The sensi tivity is non linear however it is typically about 5 V rms output per de volt input With O volts dc on this input the maximum output amplitude of the hp 3335A is nominally 5 volts rms into 50 ohms or 75 ohms An UN Section HI LEVELED annunciator on the front panel will light whenever this input is selected 3 63 Remote Programming 3 64 This part of Section HI contains a brief description of the HP IB operation and includes programming infor mation for operating the Model 3335A on the HP IB H also includes information on the HP IB connector HP IB logic levels and programming codes 3 65 The HP iB The HP IB is a carefully defined instru mentation interface which simplifies the integration of instruments calculators and computers into systems The 3335A is a fully programmable instrument interfacing with the HP IB by means of a rear panel HP IB connector see Figure 3 1 The HP IB connector is directly compatible with the mating connectors on the hp 10631 A B or HP IB Cable Assemblies 3 66 HP IB Logic Levels The 3335A HP IB lines use standard TT
32. frequency is reached Further CCW rotation of knob will not lower the frequency NOTE The same result occurs at the upper limit of the sweep Return the instrument to full keyboard control by pres sing the STOP key This will result in returning to the center frequency NOTE The single sweep speed of a sweep in progress can be changed by depressing the other single sweep key To go from the single sweep mode to the auto sweep mode it is recommended the STOP key be used to terminate the single sweep prior to activating the auto sweep mode 3 54 HP IB Indicators and LOCAL key 3 55 The keyboard contains two HP IB annunciators REMOTE and ADDRESSED One indicates when the 3335A is under remote control the other indicates when the 3335A is addressed to listen by the HP IB controller Model 3335A If the 3335A is under remote control it can be returned to local control control by keyboard inputs by activating the LOCAL key providing a local lockout command has not been sent by the HP IB system controller 3 56 Front Panel Output Connectors A RGSS The output of the hp 3335A is directly coupled Do not allow external dc currents to develop more than S volts across the output terminals For Option 002 004 and Option 003 the de voltage across the output should not be greater than 10 volts 3 57 The front panel contains the instrument output con nectors located in the right most group labeled OUTPUT and the
33. frequency can be changed with the sensitivity of the flashing digit by turning the frequency knob For more or less sensitivity the flashing digit can be moved using the left and right digit arrows Holding an arrow key down causes the flashing digit to step successively to the end digit When in the MANUAL TUNE mode the frequency can be incremented by the frequency increment using the INCR keys and all operating parameters can be checked using the FUNCTION keys A description of the MANUAL TUNE controls follows KEYS MANUAL TUNE ON OFF This key activates the manual tune mode When on an annunciator above the key is illuminated LEFT ARROW Digit Key Steps flashing digit to the left RIGHT ARROW Digit Key Steps flashing digit to the right Frequency manual tune knob Used to change the fre quency with the sensitivity of the flashing digit 3 52 Sweep Mode 3 53 The sweep mode can be used to sweep the output frequency over a specified center frequency This mode of operation is controlled by the FREQUENCY SWEEP keys which include GO TO START FREQ START SINGLE 10 SEC START SINGLE 50 SEC MANUAL START AUTO and STOP A SWEEP OUTPUT connector below the Section IH keys provides an output proportional to the sweep fre quency for use with a plotter The frequencies of a fre quency sweep are determined by the sweep width and center frequency The sweep rate in AUTO is approxi mately 8 sweeps second 100 steps sweep In MAN
34. from the start frequency to the upper limit The sweep resets to the start frequency when the upper limit is reached and again sweeps up in frequency at a rate of approximately 8 sweeps second and 100 steps sweep The frequency is only swept in the increasing fre quency direction in both the single sweep or auto sweep modes When the instrument is in the auto sweep mode the display is blank except for the SWEEPING annunciator The STOP key must be used to exit an auto sweep MANUAL key This key is used to put the sweep into a manual sweep mode When activated an annunciator is illuminated to the left of the MANUAL key The frequency sweep between the start frequency and upper limit can be manually controlled by the frequency knob making 1000 steps between the two limits When either the upper limit or start frequency is reached the manual sweep stops When the frequency knob is rotated changing the fre quency the display segments and annunciators may dim slightly 3 9 Section IH STOP Key This key is used to stop a single sweep before it is complete or to halt an auto sweep and return to key board control When pressed the frequency is returned to the center frequency which was the frequency of operation prior to activating the sweep mode SWEEP OUTPUT The sweep output provides a dc voltage from 0 to 2 V O V de corresponds to the start frequency of the sweep and 2 V the upper limit During the sweep the output is proportion
35. g the AMPTD INCR FUNCTION key DATA keys 0 through 9 and a DATA ENTRY key dBm or dBm If an ampli tude increment greater than 99 99 dBm is programmed the display flashes indicating an illegal entry A description of the keys and amplitude increment display indicators follows KEYS AMPTD INCR Key Preface key for entering amplitude increment When pressed the front panel displays the pres ent amplitude increment and the controller is enabled to accept new amplitude increment data DATA Keys These keys are used to enter the desired amp litude increment DATA ENTRY Keys Used to finalize the amplitude incre ment entry If an increment is programmed that exceeds the maximum the display flashes indicating an illegal entry INCR Keys These keys are used to change the output amp litude by the programmed increment By holding an INCR key activated the amplitude can be stepped through an amplitude sweep DISPLAY INDICATORS AMPLITUDE INCR Indicator Indicates the front panel is displaying the present amplitude increment or an amplitude increment entry ENTRY Indicator Indicates the display holds an amplitude increment entry not yet finalized by a data entry key 3 6 Model 3335A The numeric display indicates the amplitude increment pro grammed NOTE Amplitude increment is actually in dB but the dBm annunciator is used Example Program an amplitude increment of 2 75 dBm Display Result 2 75 dBm D
36. ies determined by the frequency of operation center frequency and the SWEEP WIDTH programmed from the FUNCTION group A manual sweep mode allows the user to manually sweep the programmed set of frequencies To return to keyboard operation of the other key groups the STOP key in the SWEEP subgroup must be pressed 3 23 Turn On Operating Parameters 3 24 When the Model 3335A is turned on the output parameters of the FUNCTION group initially are Frequency 1 000 000 0 Hz Amplitude 86 98 dBm 50 Q 88 74 dBm 75 2 FREQ INCR 1 0 Hz AMPTD INCR 1 0dB Note For AMPTD INCR display the annuncia tor dBm is used for dB INCR 1 0 deg SWEEP WIDTH 100 0 Hz 3 25 The 3335A turns on with the frequency displayed To check the initial conditions of the other operating parameters press the key in the FUNCTION group of the parameter of interest The display should indicate the initial conditions stated in the preceding paragraph If the instru ment was not previously connected to a power source and in STBY the out of lock annunciator UNLOCKED will be displayed until the reference oven temperature stabilizes lt 20 minutes If UNLOCKED is still displayed after twenty minutes check to be sure the BNC to BNC adapter from the 10 MHz REF OVEN OUTPUT connector to the 40 N MHz Ref Input has been installed see Figure 6 2 Item 25 3 26 Frequency Entry 3 27 The 3335A has a frequency range of 200 Hz to 80 099 999 99
37. ing attach a tag indicating the type of service required return address model number and full serial number Also mark the container FRAGILE to assure careful handling In any correspondence refer to the instrument by model number and full serial number 2 35 Other Packaging The following general instructions should be used for repackaging with commercially available materials a Wrap the instrument in heavy paper or plastic If shipping to a Hewlett Packard office or service center attach a tag indicating the type of service required return address model number and full serial number b Use a strong shipping container A doublewall carton made of 250 pound test material is adequate c Use enough shock absorbing material 3 to 4 inch layer around all sides of the instrument to provide firm cushion and prevent movement inside the container Pro tect the control panel with cardboard d Seal the shipping container securely e Mark the shipping container FRAGILE to assure careful handling Model 3335A Section Il SECTION Hi OPERATING 3 1 INTRODUCTION 3 2 This section contains operating and programming instructions for the hp Model 3335A Synthesizer Level Generator Included is a description of controls connectors and indicators operating instructions and operator s main tenance A list of operating features is tabulated in Table 3 1 which can be used as an index to locate operating infor mation
38. ing information is provided in Section IH Programmability Ail FUNCTION keys except DISPLAY ail DATA keys including the ENTRY keys all INCR keys and all FRE QUENCY keys except the MANUAL TUNE keys and MAN UAL SWEEP key are programmable The POWER key and the impedance selection switch are not programmable HP IB Connector The rear panei HP IB connector provides ati tines for remote control and digital output using the HP 18 Fhe connector is compatible with the hp 10631 A B or C HP IB cables and contains metric threaded cable mounting studs Maximum HP IB Cable Length 2 meters 6 56 feet per device 20 meters 65 6 feet total accumulation per system HP 1B Lines The 3335A uses all of the HP IB lines except EOI End or Identify SRQ Service Request and the data line DIO 8 Data input Output All data is received through the HP IB Data Input Output DIO lines Data Transfer Timing Timing of data transfer is controlled by handshake lines DAV NRFD and NDAC HPB Logic Levels TTL compatible low true true state digital ground or 0 V to 0 4 V de false state open or 2 5 V de to 5 V do isolation The HP IB lines and 3335A are optical coupled Listen Address Code The 3335A is shipped from the factory with an ASCII listen address of octal 044 Instructions for changing the listen address are provided in Section HE HP IB Bus Commands The 3335A will respond to certain Unaddress Universa
39. instru ments equipped with Options 002 003 and 004 the communications sweep is implemented by moving the TRACK NORM switch located on the rear panel to the TRACK position On standard instruments it is implement ed by modifying the instrument internally Only qualified service personnel can do the modification safely Hazardous voltages are exposed when the top cover is removed The procedure for implementing this feature is presented on the apron page of Figure Group D Model 3335A Only qualified service personnel should imple ment the special sweep Hazardous voltages are exposed when the top cover is removed 9830A Calculator program data message to establish an output frequency of 12 kHz and frequency increment of 500 Hz 33354 ADDRESS PROGRAM COMMAND INFGRMATION presses pinansin reee armoon CMD U F12K1500 8 OUTPUT __ L Hz ENTRY KEY TO BUS FREQ INCR ENTRY UNLISTEN OF S00 COMMAND FREQ INCR NOTE F WAS PROGRAMMED PRECEDING THE CONTROLLER __ TALK ADDRESS 3338A LISTEN ADDRESS kHz ENTRY KEY FREO ENTRY OF 12 PUTS INSTRUMENT IN THE FREQUENCY FUNCTION 9825A Calculator program data message to establish an output frequency of 12 kHz and frequency increment of 500 Hz 3335A ADDRESS PROGRAM pei ee Ur EEEN OUTPUT TO BUS INCLUDES THE UNLISTEN COM MAND AND CALCULATOR TALK ADDRESS THE OUT PUT CODE 7 CAN BE OFHER DIGITS 3335A LISTEN ADDRESS DECIMAL EQUI
40. isplay present amplitude press AMPLITUDE FUNC TION key Display Result Present Amplitude display Increment amplitude by pressing the INCR up arrow Display Result Present amplitude is incremented by 2 75 dBm 3 35 Phase Increment Entry 3 36 The phase increment can be used to change the out put phase relationship with respect to another signal by a fixed phase increment As an example the 10 MHz rear panel output and the front panel output signal have a certain phase difference at turn on By phase incrementing the output the output signal will increase or decrease the initial phase difference by the magnitude of the phase incre ment programmed An example of using the phase incre ment function is illustrated in the integrated phase noise test of Section V The desired phase increment is program med by activating the INCR FUNCTION key DATA keys O through 9 and the deg DATA ENTRY key An incre ment range of 0 degree to 360 degrees is obtainable with a resolution of 0 1 degree Any increment attempted greater than 360 degrees causes the display to flash indicating an illegal entry A description of the keys and the and 9 increment displays follows KEYS INCR Key Preface key for entering phase increment When pressed the front panel displays the present phase increment and the controller is enabled to accept new phase increment data DATA Keys These keys are used to enter the desired phase increment DA
41. l Interface for Programmable Instru mentation 2 19 OPERATING ENVIRONMENT WARNING To prevent potential electrical or fire hazard do not expose equipment to rain or moisture 2 20 Operating and Storage Temperature 2 21 In order for the 3335A to meet the specifications listed in Table 1 1 the operating environment must be within the following limits Temperature 4 4 eae ed es 0 to 55 C Humidity aaau oe cee eae oo lt 85 relative Altitude wo we Sodreth aes ltacs lt 15 000 feet 2 22 Cooling System 2 23 A forced air cooling system is used to maintain the operating temperature required by the instrument The cooling fan is located on the right side of the instrument drawing air through the filtered side panel When operating the instrument choose a location that provides at least three inches of clearance at the rear and at least one inch for each side Failure to provide adequate air clearance will result in excessive internal temperature reducing instrument reliability The clearances provided by the plastic feet in bench stacking and the filler strip in rack mounting allow air passage across the top and bottom cabinet surfaces NOTE Rack Mount side slide assemblies cannot be used with the 3335A These assemblies block air passage to the fan and will cause overheat ing 2 24 Thermal Cuteut Switch 2 25 The 3335A is equipped with a thermal cutout switch which automatically removes line vo
42. l and Addressed Commands see information on Remote Program ming in Section HH Telecommunications Features Amplitude blanking of the output signal at each change of output frequency is obtainable except in the manual tune and manual sweep modes Special sweep feature allows each frequency step to be held for four seconds and also includes amplitude blanking General o 3 Operating Temperature 0c to 55 C Storage Temperature 40 Cto 75 C Power Requirements 100 V 120 V 220 V or 240 V ac 5 10 48 Hz to 66 Hz 200 VA Maximum Dimensions Dimensions in millimeters and inches Height 133 4 5 1 4 Width 425 5 16 3 4 Depth 507 7 19 3 4 Weight Weight in kilograms and pounds 19 05 42 Rev A 1 5 Section I Equipment 3335A Service Kit Consists of 2 Extender Boards 1 Extender Board 1 Extender Board 1 Service Cable 1 Service Cable 4 SMA to BNC Terminations 50 Q Feedthru 75 Q Feedthru Adapters BNC TEE Conn Adapter 2 BNC Maie to Male 2 Type N f to BNC m 2 Type N m to BNC 4 2 BNC f to dual banana plug Thermal Converter Double Balanced Mixer Attenuator Attenuator Attenuator Attenuator Digital Voltmeter AC Voltmeter Oscilloscope Tracking Generator Table 1 3 Recommended Test Equipment Required Characteristics Supplied with the instrument impedance 50 or 75 Q Frequency Range 200 Hz 10 MHz Frequency Re
43. lish it Note that the attenuator attenuates in 2 dB steps while amplitude changes from 01 dB to 1 99 dB are realized electronically by the leveling loop circuit A6 Assembly Section VII Service Group M Programming amplitudes within the 1 99 dB capability of the leveling loop and or selecting amplitudes that minimize pad actuations will increase attenuator life Table 8 N 1 in Section VIH Service Group N provides a detailed indication of the attenuator pads selected for a particular programmed amplitude for both 50 ohm and 75 ohm output impedances 3 89 Unaddressed or Local Operation When Connected To the HP IB 3 90 If the 3335A is connected to the HP IB and operated locally or operated in remote but not addressed to listen interruption of the display keyboard scan and the sweep mode function can occur The instrument is controlled by one microprocessor The processor must service the instru ment function and also handle the HP IB lines When the ATN line is true or when the 3335A is addressed to listen microprocessor responds to every DAV handshake As each data byte is placed on the bus DAV is pulled true which activates the 3335A HP IB interrupt request line IRQ to the controller section This causes the controller to inter rupt the scan and sweep operation and service the interrupt request before returning to local operation of the 3335A functions If a long data string is sent on the HP IB a data byte rate can be achie
44. ltage when the internal temperature becomes excessive The switch resets auto Section I matically when the instrument cools If a thermal cutout occurs check for an inoperative fan clogged fan parts or filter and other conditions that could obstruct air flow To clean the fan filter the side panel filter assembly must be removed Flush the filter with soapy water rinse clean and air dry 2 26 Bench Operation 2 27 The instrument has plastic feet attached to the bottom panel The front feet contain foldaway tilt stands for convenience in bench operation The tilt stand raises the front of the instrument for easier viewing of the control panel The plastic feet are shaped to make full width modu lar instruments self align when they are stacked A front handle kit hp Part No 5060 9899 Option 907 can be installed for ease of handling the instrument on the bench see Figure 2 3 The kit is shipped with the instrument if Option 907 is also ordered Otherwise the front handle kit is available separately by its hp part number 2 28 Rack Mounting 2 29 The 3335A can be rack mounted in a rack having an EIA standard width of 482 6 mm 19 inches The instru a TRIM HANDLE KIT BENCH OPERATION bee sA OPTION 908 RACK MOUNT FLANGE FRONT HANDLE KIT Figure 2 3 Rack Mount and Handle Kits 2 3 Section I ment can be rack mounted with or without a handle kit by use of the following items a Rack m
45. m to 86 98 dBm 75 ohms 11 25 dBm to 88 74 dBm Option 002 75 ohms unbalanced 124 ohms balanced 135 ohms balanced Option 003 75 ohms unbalanced 11 25 dBm to 88 74 dBm 450 ohms balanced Option 004 Same as Option 002 Amplitude Settling Time lt 500 msec to within 0 02 dB of final value 11 25 dBm to 88 74 dBm Internal Frequency Reference Frequency stability is obtained by use of a 10 MHz crystal oscillator in a temperature stabilized oven A high stability 10 MHz temperature stabilized crystal oscillator is provided by Option 001 The master 40 MHz oscillator of the instru ment reference section is capable of operating open loop no oven or external reference but the frequency stability is not specified External Frequency Reference The 40 MHz master oscillator of the reference section can be phase locked to an external reference through a rear panel BNC connector The amplitude and frequency requirements of the external signal are 7 dBm to 7 dBm 0 4 V to 0 5 V with frequency being a sub harmonic of 40 MHz and 1 MHz Remote Programming The 3335A is a fully programmable instrument designed for systems interfacing with the Hewlett Packard Interface Bus HP IB It will recognize a preset listen address and accept bit paratlel word byte serial ASCII coded instructions The address is preset by five rear panel listen address switches A brief description of the HP IB with address and programm
46. ning refer to the Operating and Service Manual This symbol appears in this section of the manual flagging operating instruction information Figure 3 1 Front and Rear Panels Model 3335A e 7 Poeg Gd a Se amp 9 0 osteta eces AC Line input Connector AC Line Fuse Line Voltage Selection Switches Used to sefect the ac line input for the voltage of the power source HP IB Connector Used to interface the instrument with the HP B for remote operation HP iB Listen Address Selection Switches Used to set the instrument listen address 10 MHz OUTPUT Connector Provides a 10 MHz external reference signal generated by the instrument s reference section amp 40 N MHz REF INPUT Connector Provides the input to the reference section sampling detector to phase iock the master oscillator The notation 40 N MHz means this input must be a subharmonic of 40 MHz The input can be the in Option 002 004 Front Panel Figure 3 1 Front and Rear Panels Cont d keys are used to complete a data entry or to clear an entry made in error The FUNCTION and DATA groups together are used to program the operating parameters 3 18 INCR Keys 3 19 There are two keys in the INCR group an arrow up and an arrow down These keys are used to increment Section IH ternal 10 MHz crystal oscillator from the REF OUTPUT item 25 or an external standard 10 MHz
47. nthesizer Level Generator is a wide range source operating over the range of 200 Hz to 80 MHz with output resolution of 001 Hz The Synthe sizer Level Generator is capable of making a step frequency sweep both automatically or manually under operator control from the keyboard Output amplitude is selectable over the range of 13 01 dBm to 86 98 dBm for the 50 ohm output and 11 25 dBm to 88 74 dBm for the 75 ohm output 1 9 The 3335A Synthesizer Level Generator provides three communications oriented options in addition to the standard 50 ohm and 75 ohm output impedance Options 002 and 004 provide output impedance of 75 ohms un balanced 124 ohms balanced and 135 ohms balanced each terminated in equivalent WECO output connectors Option 004 contains miniature connectors Option 003 provides a 75 ohm unbalanced BNC output and a 150 ohm balanced BNC pair output Refer to Table 1 2 General Information for the amplitude range of the Options 1 10 The Synthesizer Level Generator develops the output signal by an indirect synthesis technique This technique uses voltage controlled oscillators which are phase locked to reference signals generated by a 40 MHz master oscillator in the reference section The master oscillator is phase locked to an internal temperature stabilized oscillator or can be phase locked to an external reference signal A 10 MHz signal derived from the master oscillator is available at a rear panel connector for
48. ntrol address lines Al through A5 Table 3 4 lists the listen addresses obtainable and the switch positions required to set each address The addresses are provided in ASCII Octal Decimal and Hex adecimal codes The upper position of the switch corres ponds to 1 the lower position to 0 These positions correspond to the one s and zero s of Table 3 4 When changing the listen address verify that the new address does not conflict with that of another instrument on the bus Table 3 4 Listen Addresses HP 18 instrument Listen Address Switches 43 2 instrument Listen Address asci SP 32 20 040 041 t 042 043 044 045 OPoOONoeoQ0 coco oeoO em RP eRe BKB OOo oS Ba DOmm OO OmOnmO o 4 0 0 0 0 Q 0 0 0 tt md A OOOO 2002300 AOl2O070 0 w e eococ0cooo 2a 22 OO00 SAO Ooo O 0 0 70 NWOORWN e OM SS d i a d m ad ab ab b ok gt 0000 m O Omm OO O moO 0m0 POSITION O POSITION 3 79 Unaddressing Once the 3335A is addressed to listen it will remain addressed until it is unaddressed or cleared by the system controller There are several ways to clear an address a By giving the Unlisten comand UNL 077 Octal ASCH this command must be given in the HP IB com mand mode ATN line low 3 13 Section IH b By pulling the IFC interface Clear line low This asynchronously clears all instruments on the bus c By gi
49. ogramming a log sweep all parameters entered from the calculator keyboard 9830A PROGRAM CIM MHE2 3 START THPLIT A 1 DISP STOP FREQ lt TH MHZ3 6a THPUT B Pe DISP OF STEPS HEXT I SH OUTRUT olds lasted EXAMPLE 8 Model 3335A 9825A PROGRAM Programming an amplitude sweep all parameters entered from the calculator keyboard 9830A PROGRAM izaiki Gray 9825A PROGRAM Finekitude Cin dBeag Taf tltude Cir dim F s B ryt tr 4 Ti Figure 3 4 9830A 9825A Program Examples Cont d
50. ounting without handles use Rack Mount Flange Kit hp Part No 5061 0077 Option 908 b Rack mounting with handles use the combination Rack Mount Flange Front Handle Kit hp Part No 5061 0083 Option 909 NOTE The Rack Mount Flange Kit of item a will not provide the space requirement for rack mount ing when used with the bench handle assembly hp Part No 5060 9899 Option 907 To rack mount with handles the combination kit of item b Option 909 must be used see Figure 2 3 If either Option 908 or 909 is ordered the corresponding kit is shipped with the instru ment Otherwise both kits are available sep arately by their hp part numbers CAUTION If instrument is to be rack mounted do not install standard slide kit Use of a slide kit blocks air passage to the side mounted fan and will cause excessive heating to occur within the instrument 2 30 STORAGE AND SHIPMENT 2 31 Environment 2 32 The instrument should be stored in a clean dry environment The following environmental limitations apply to both storage and shipment 2 4 Model 3335A Temperature 40 C to 75 C Humidity Scien g Gat Ae hee lt 95 relative Altitude 566754 c ds eee S lt 25 000 feet 2 33 Packaging 2 34 Original Packaging Containers and materials equiva lent to that used in factory packaging are available through Hewlett Packard offices If the instrument is being returned to Hewlett Packard for servic
51. oup can be stored in one of ten PRESET registers The ten registers are numbered O through 9 and are capable of storing ten different sets of the operating parameter s frequency amplitude frequency increment amplitude increment phase increment and sweep width At turn on all registers contain the turn on operating parameters The PRESET keys which control the registers are STORE DISPLAY and RECALL A description of the PRESET keys follows KEYS STORE Key Used to store the operating parameters of the front panel output The digit key of the register to store the parameters must be pressed following the STORE key This stores the operating parameters frequency amplitude fre quency increment amplitude increment phase increment sweep width and the state of the manual tune control with out affecting the output signal RECALL Key Used to recall the operating parameters of a particular register The digit key of the register containing Section IH the operating parameters desired must be pressed following the RECALL key This changes the amplitude and fre quency of the output signal to that stored in the register It also changes all other FUNCTION parameters to that stored in the register e g AMPTD INCR FREQ INCR INCR and SWEEP WIDTH DISPLAY keys Used to display a particular operating parameter stored in a register Displaying a parameter does not change the output signal but is displayed as an entry This entr
52. panel is not display ing the output frequency but holding a frequency entry that has not yet been finalized by a data entry key The numeric display indicates the output frequency pro grammed The digits are entered from right to left as fre quency digits are keyed in The frequency can be displayed in Hz kHz or MHz dependent on which range key is pressed The units of the display can be changed at any time by pressing the desired range key Example Program a frequency of 12345678 901 Hz Display Result 12 345 678 901 Hz Change units to kHz Press kHz ENTRY key Display Result 12 345 678 901 kHz Change units to MHz Press MHz ENTRY key Display Result 12 345 678 901 MHz NOTE If the front panel is displaying frequency it is not necessary to preface a frequency entry with the FREQUENCY key 3 28 Frequency Increment Entry 3 29 Frequency increment is used when it is desired to manually change the frequency by a specified increment The desired frequency increment is programmed by activating the FREQ INCR FUNCTION key DATA keys 0 through 9 and a DATA ENTRY key Hz kHz or MHz just as the frequency was programmed A frequency increment of zero no increment can be programmed while the maxi Model 3335A mum increment programmable is the maximum output fre quency of 80 099 999 999 Hz Trying to program an in crement greater than the maximum results in a flashing dis play indicating an illegal entry To change the ou
53. pondence with Hewlett Packard concerning this instru ment should include the complete serial number 1 27 H the serial number of your instrument is lower than the serial number on the title page of this manual you must modify your manual for agreement with your instrument Refer to Section VII MANUAL CHANGES for the infor mation that will adapt this manual to your instrument 1 28 SAFETY CONSIDERATIONS 1 29 The Synthesizer Level Generator is a Safety Class I instrument and kas been designed according to internation al safety standards To ensure safe operation and to retain the instrument in a safe condition this Operating Manual contains information cautions and warnings which must be adhered to by the user 1 30 The 3335A s front panel contains a A symbol which is an international symbol meaning refer to the Rev A 1 3 Section I Operating Manual The symbol flags important operating instructions located in Section HI required to prevent damage to the instrument To retain the operating condi tion of the instrument these instructions must be adhered to Model 3335A 1 31 RECOMMENDED TEST EQUIPMENT 1 32 Equipment required to maintain the Model 3335A is listed in Table 1 3 Other equipment can be substituted if it meets or exceeds the critical specifications listed in the table Table 1 1 Specifications STANDARD OPTION 001 FREQUENCY Range 50 3 Stability Standard Long Term 1x 10 pe
54. r day 41x 10 per month Stability Option 0014 Long Term lt 5 X 10 day after 24 hour warmup and oscillator off time fess than 24 for continuous aperation Spectral Purity Harmonie Distortion hours lt 1 X 10 year Ail harmonically related signals will be less than the follow ing tevels relative to the fundamental at full output Freq Range 200 Hz to 10 MHz 10 MHz to 80 MHz integrated Phase Noise Harmonic Leve 45 dB 40 dB 30 kHz band excluding 1 Hz centered on the carrier 99 MHz lt 63 dB 20 MHz lt 70 dB 40 MHz lt 64 gB 80 MHz lt 58 dB Spurious 25 C 10 C Ail non harmonically related signals are gt 75 dB below the carrier or 125 dBm whichever is greater AMPLITUDE Range 50 2 13 01 dBm to 86 98 dBm 75 Q 11 25 dBm to 88 74 dBm Absolute Level Accuracy Maximum output at 100 kHz 10 C to 35 C 0 05 dB Flatness Relative to 100 kHz Full Amplitude 50 0 75 Q 1 kHz 25 MHz 07 dB 200 Hz 80 MHz 316dB Attenuator Accuracy Relative to Full Output 100 kHz in 2 dB Steps impedance Attenuation dB 0 to 18 20 to 58 60 to 98 1 4 Rev A Accuracy 200 Hz 25 MHz 80 MHz 0 04 dB 0 20 dB Model 3335A Section Table 1 1 Specifications Cont d OPTION 002 004 peda 75 amp 200 Hz to 80 999 999 999 MHz 124 2 10 kHz to 10 MHz 135 Q 16 kHz to 2 MHz Stability Long T
55. rranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED HEWLETT PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES HEWLETT PACKARD SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSE QUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE Product maintenance agreements and other customer assistance agreements are available Jor Hewlett Packard products For any assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are provided at the back of this manual 16 1 79 Model 3335A Section I SECTION GENERAL INFORMATION 1 1 INTRODUCTION 1 2 This Operating and Service Manual contains informa tion relative to the installation operation performance testing adjustment and maintenance of the Hewlett Packard Model 3335A Synthesizer Level Generator Figure 1 1 shows the Synthesizer Level Generator and the acces sories supplied with the instrument 1 3 Packaged with this manual is an Operating Informa tion Supplement This
56. rt No 59401 90030 Microfiche Part No 59401 90090 Table 3 2 Interface Functions Identification Description SHG No source handshake capability AH Acceptor handshake capability T No talker capability i L2 Basic listener SRE No service request capability Remote Local capability No paralle poll capability Device clear capability No device trigger capability No controler capability ovo zs aug a EE A Section III FALSE DIOI DIO8 TRUE FALSE DAV TRUE FALSE NRFOD TRUE FALSE NDAC TRUE A and B NOTE Events O through o Note HP IB logic is iow true Comment The interval between A and B indicates when one byte of information is on the data lines DIOt through DIO8 NOTE For the remainder of this explana tion the term data refers to one byte of information fone seven bit ASCH character Listener indicates he is ready to receive data Source recognizes listener is ready for data places a new character on theDIO lines and indicates to the listener the data on the DIO lines is valid Listener recognizes the data is valid and indicates to the source he is not ready for any new data The listener accepts the data on the DIO fines to store internal ly after NRFD goes true The listener indicates to the source that he has stored internal ly the data on the DIO lines When the data is stored internal processing begins Source recognizes tha
57. second sweep by pressing START SINGLE 10 SEC key Display Result Annunciator above key illuminates display shows frequency sweep which stops at 12 750 000 0 Hz Sweep time is 10 seconds Initiate single 50 second sweep by pressing START SINGLE 50 SEC key 3 10 Model 3335A Display Result Annunciator above key illuminates display shows frequency sweep which stops at 12 750 000 0 Hz Sweep time is 50 seconds Initiate an Auto Sweep by pressing START AUTO key Display Result Display blanks except for SWEEPING annunciator Instrument is continuously sweeping from start frequency to the upper limit Stop Auto Sweep by pressing STOP key Display Result Instrument returns to the center fre quency Display indicates 12 500 0 kHz SWEEPING annunciator extinguishes Initiate MANUAL Sweep by pressing MANUAL key Display Result SWEEPING annunciator illuminates again Annunciator next to MANUAL key illuminates Manually Sweep Frequency Rotate frequency knob Display Result Frequency increases and decreases with CW and CCW rotation of knob CENTER annunciator flashes when sweep passes through 12 500 0 kHz the center fre quency Press GO TO START FREQ key Display Result 12 250 0 kHz Press MANUAL key of SWEEP group Display Result No change in display Rotate frequency knob CW Display Result Frequency increases Rotate frequency knob CCW Display Result Frequency decreases until 12 250 0 kHz start
58. shipment should be as shown in Figure 1 1 This instrument was carefully inspected both mechanically and electrically before shipment It should be free of mars or scratches and in perfect electrical order upon receipt Procedures for checking electrical performance are given in Section IV If the contents are incomplete if there is mechanical damage or defect or if the instrument does not pass the electrical performance test notify the nearest Hewlett Packard 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 The warranty statement is located at the front of this manual 2 5 PREPARATION FOR USE 2 5 a Reference Frequency 2 5 b A stable frequency reference must be connected to the 40 N MHz REFerence INPUT located on the rear panel If the internal 10 MHz reference is to be used the BNC to BNC Adapter see Figure 6 2 Item 25 must be connected from the 10 MHz REFerence OVEN output also located on the rear panel to the 40 N M Hz REFerence INPUT The BNC to BNC Adapter is packed with the accessories 2 6 Power Requirements 2 7 The Model 3335A Synthesizer Level Generator requires a power source of 100 120 220 or 240 V ac 5 10 48 to 66 Hz single phase Power consumption is 200 VA maximum 2 8 Line Voltage Selection Before switching
59. sponse 0 05 dB 200 Hz 10 MHz Input Voltage 1 V rms Impedance 60 Q Frequency Range 50 kHz to 80 MHz Certified See Note 1 Range 0 12 dB Steps t dB Certified See Note 1 Range 0 120 dB Steps 10 dB Fixed 3 dB Accuracy 0 3 dB Fixed 6 dB Accuracy 0 3 dB AC Function Full Scale Ranges t V 10 V Freq Range 200 Hz 100 kHz Accuracy 0 5 Resolution 0 1 mV Input Impedance gt 1 mO lt 90 pF DC Function Full Scate Ranges 100 mV 20 V Accuracy 0 45 Resolution 5 digits input Resistance gt 1 MQ Full Scale Ranges 0 1 1 V Frequency Range 200 Hz to 4 MHz Accuracy 10 Input Impedance 10 MQ lt 25 pF Vertical Sensitivity 0 005 V div to 2 V div Sweep 0 05 us div to 0 1 sec div input Impedance 1 MQ lt 20 pF input Coupline ac de Freq Range 100 kHz to 110 MHz Amplitude Range 0 to 10 dB z wn Adj xXx KKK KKK X X Model 3335A Recommended Model hp 03335 87901 hp 5061 0775 hp 03335 66518 hp 03335 66520 hp 03335 61602 hp 03335 61627 hp 1250 1548 hp 11048C hp 11094B hp 1250 0781 hp 1250 0501 hp 1250 0216 hp 1250 0077 hp 1250 0780 hp 1251 2277 hp 11050A 50 Q or hp 11050A HO1 75 Q hp 10534A hp 355C hp 355D hp 8491A Option 003 hp 8491A Option 006 hp 3455A hp 400F L hp 180C D 18054 1825A hp 8443A Model 3335A Equipment Sp
60. st of accessories supplied with the Model 3335A This list comprises the 3335A service kit hp Part No 03335 87901 Accessory Qty hp Part No Extender Board 2 5061 0775 Extender Board 2 03335 66518 Section Accessory Qty hp Part No Service Cable l 03335 61602 Service Cable 1 03335 61627 SMA to BNC l 1250 1548 Adapter BNC to BNC Adapter l 1250 1499 1 21 ACCESSORIES AVAILABLE 1 22 The following is a list of Hewlett Packard accessories available for use with the Model 3335A Accessory hp Modei No 50 Q2 Feedthrough 11048C 75 Q Feedthrough 11094C 1 23 HP IB INTERFACING AND PROGRAMMING INFORMATION 1 24 Section H of this manual contains instructions for interfacing the Model 3335A with the HP IB A brief description of the sequence of events comprising the transfer of data by the HP IB is provided in Section III followed by programming information Information con cerning the design criteria of the bus is available in IEEE Standard 488 1975 titled IEEE Standard Digital Interface for Programmable Instrumentation 1 25 INSTRUMENT AND MANUAL IDENTIFICATION 1 26 The instrument serial number is located on the rear panel Hewlett Packard uses a two section serial number consisting of a four digit prefix and a five digit suffix A letter between the prefix and suffix identifies the country in which the instument was manufactured A USA G West Germany J Japan U United Kingdom AH cor res
61. sters each capable of storing all of the operating para meters of the FUNCTION group This is useful for recalling a particular set of operating parameters without having to enter each one 3 16 DATA Keys 3 17 The DATA keys are used to enter a new operating parameter which is selected by the FUNCTION keys This group contains a subgroup called ENTRY The ENTRY Numeric Display indicates the magnitude and polarity if applicable of the parameter being displayed Annunciator Group 2 Indicates the units of the operating parameter displayed MHz kHz Hz dBm or deg Also contains the annunciators ENTRY UNLOCKED SWEEP ING and UNLEVELED Manual Tune Keys initiates the manual tune frequency mode and establishes the degree of resolution of the manual tuning Frequency Tune Knob Used to manually alter the fre quency when in the manual tune or manual sweep mode Sweep Keys Initiates and controls the frequency sweep mode of operation Output Connectors Provides the programmed output at the output impedance selected by the front panel imped ance switch Impedance Switch Used to select the desired output impedance This switch determines which output connec tor litem 15 is active 0000 00 SWEEP OUTPUT Connector Provides a 0 to 2 V de sweep ramp for use in driving external equipment oscil loscope X Y recorder etc when in the sweep mode AN Symbol This symbol is an international symbol mea
62. t met its published specifications at the time of shipment from the Jactory Hewlett Packard further certifies that its calibration measurements are traceable to the United States Na tional Bureau of Standards to the extent allowed by the Bureau s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Hewlett Packard product is warranted against defects in material and workmanship for a period of one year from date of shipment except that in the case of certain components listed in Section I of this manual the warranty shall be for the specified period During the warranty period Hewlett Packard Company will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by hp Buyer shall prepay shipping charges to hp and hp shall pay shipping charges to return the product to Buyer However Buyer _ Shall pay all shipping charges duties and taxes for products returned to hp from another country Hewlett Packard warrants that its software and firmware designated by hp for use with an instrument will execute its programming instructions when properly installed on that instrument Hewlett Packard does not warrant that the operation of the instrument or software or firmware will be uninterrupted or error free _ LIMITATION OF WARRANTY The foregoing wa
63. t of 200 Hz All other parameters are still initial conditions Recall the amplitude of PRESET register 3 by pressing RECALL AMPLITUDE 3 Display Result Display indicates amplitude of 3 dBm All other parameters except frequency increment are initial conditions Frequency increment is 200 Hz 3 45 Display Last Entry 3 46 The DISPLAY LAST ENTRY KEY of the FUNC TION group is used to recall to the display the last entry made It will not recall the function the entry was made in but only the digits If an operating parameter from one of the ten storage registers is displayed as an entry by acti vating the DISPLAY key of the PRESET FUNCTION keys it becomes the last entry Conversely when the CLEAR key is pressed the display shows an entry of zero but this does not constitute a last entry This is because a display entry cleared in error can be recalled by pressing the DIS PLAY LAST ENTRY key 3 47 Sweep Width Entry 3 48 In the sweep mode the 3335A frequency can be swept over a specific range The operating frequency before the sweep mode is the center frequency of the sweep The starting point of the sweep is determined by the sweep width programmed Half the sweep occurs below the center frequency and half above the center frequency The sweep width is programmed by activating the SWEEP WIDTH FUNCTION key DATA keys 0 through 9 and a DATA ENTRY key Hz kHz or MHz Programming a sweep width greater than the instrument s
64. t the listener has accepted and stored internally the data on the DIO lines Source removes the data valid indication by setting DAV false in prepara tion for placing the next byte of information on the DIO Hnes Listener recognizes that the source has acknowledged its acceptance of the data and removes the data accepted indi cation Listener continues to process the internally stored data When the listener completes pro cessing the internally stored data the listener sets NRFD false which indicates he jis ready to receive the next byte of informa tion Q must occur for each byte of information iransferred between devices on the HP iB Figure 3 2 HP IB Handshake Sequence of Events 3 12 Model 3335A Table 3 3 Bus Messages Device Data Transfers device dependent infor Cammunications mation from one device to one or more devices on the Bus Trigger Causes a group of selected devices to simultaneousty initiate a set of device dependent actions Clear Causes an instrument to be set to a predefined state a certain range function etc Remote Permits selected devices to be set to remote operation allowing parameters and device characteris Device tics to be controlled by Bus Control Messages Local Causes selected devices to return to local front panel operation Local Disables local front panel Lockout controls of selected devices Clear Returns all devices
65. te which a given instrument recognizes and responds to 3 76 When addressing instruments the system controller pulls the ATN line low to get the attention of all instru ments on the bus It then gives the ASCU coded address for one of the instruments on the bus When the addressed instrument acknowledges receipt of the address by the handshake sequence the controller clears the address code and addresses another instrument if more than one is to receive the same data When the last addressed instru ment acknowledges receipt of its address the controller releases the ATN line and clears the last address code With the ATN line released the HP IB is in the data mode The addressed instruments respond by accepting data placed on the bus using the handshake sequence This data programs the functions of the instruments 3 77 The 3335A functions only as a listener on the HP IB It accepts instructions from the controller and responds by establishing the output parameters programmed The 3335A can be addressed or unaddressed in either the LOCAL or REMOTE control mode Note that the 3335A will not go to Remote unless it is addressed to listen and the REN line is low 3 78 Changing the Listen Address The 3335A is shipped from the factory with a listen address of ASCII character octal code 044 This address can be changed by changing the positions of the rear panel listen address Section HI switches 1 through 5 which co
66. the instrument internally Only qualified service personnel can do the modification safely Hazardous voltages are exposed when the top cover is removed The procedure for implementing this feature is presented on the apron page of Figure 8 D 1 in Service Group D WARNING Since access to the Amplitude Blanking Switch requires removal of the top cover this feature should be implemented oniy by qualified ser vice personnel Hazardous voltage are exposed when the top cover is removed 3 94 Telecommunications Sweep This sweep is really a modification of the AUTO sweep The amplitude is blanked for 20 msec after each step and the duration of each step is extended so that the time duration of the step plus the 20 msecs blanking equals 4 seconds Since the AUTO sweep consists of 100 steps the total sweep time is extended to 400 seconds or 6 7 minutes Blanking the amplitude pre vents the hp 3335A from outputting spurious signals while it is changing frequencies The long time duration allows certain Selective Level Measuring Instruments to track the hp 3335A output frequency in an open loop test configuration e g see see Operating Manual for the hp 3745A B Selective Level Measuring Set If the output is displayed on an oscilloscope a slight overshoot will be observed at the beginning of each frequency step This is normal and will cause no problems in the tracking applica tion for which this operating mode was designed On
67. ther operating parameters in register 2 by pres sing their respective FUNCTION key The display should indicate the quantities previously programmed Recall the operating parameters of register 3 by pressing RECALL 3 Result Display indicates INCR of 3 0 deg INCR was the parameter displayed when STORE 3 was initiated Check other operating parameters in register 3 as previously done for register 2 Display the frequency of register 2 without changing the output frequency by pressing DISPLAY FREQUENCY 2 Display Result FREQUENCY 2 000 000 0 ENTRY This frecuency can be initiated by activating a DATA ENTRY key Initiate by pressing the Hz DATA ENTRY key Display result 2 000 000 0 Hz Recall the operating parameters of register 4 by pressing RECALL 4 Result FREQUENCY 1 000 000 0 Hz This is an initial turn on condition The other operating parameters stored in register 4 are also initial conditions When a register containing initial conditions is recalled FREQUENCY is displayed 3 41 Merging Data Into a Preset Register 3 42 Any operating parameter stored in a PRESET register can be changed by merging the new parameter into the register without changing the other parameters of the stored sets This allows the user to change a parameter in a PRESET register and only be concerned with the para meter being changed Merging a parameter is done much like storing a complete parameter set as described in the pre
68. to locat fromt Lockout panel control and simultaneously amp Local clears the Local Lockout Message Require indicates a device s need for inter Service action with the controller Status Presents status information of a Byte particular device one bit indicates whether or not the device current f Interrupt ly requires service the other 7 and bits optional are used to indi Device cate the type of service required Status A single bit of device dependent status information which may be logically combined with status bit information from other devices by the controller Passing Control Pass Control Passes bus controller responsibili ties from the current controller to a device which can assume the Bus supervisory role Bail Abort Out Unconditionaliy terminates Bus communications and returns con trol to the system controller 3 70 Messages are the means by which devices communi cate on the HP IB Table 3 3 lists the Bus Messages by Bus function and provides a description of each 3 71 HP iB Remote Operation 3 72 The HP IB Remote Enable REN line controls the instrument s mode of operation LOCAL or REMOTE With no input on the REN line it is held high by an internal puilup maintaining the 3335A in the LOCAL mode of operation When the 3335A listen address is transmitted the REN line is pulled low causing it to go into the remote control mode The REN lines does not ha
69. tput 15 V Input Impedance 100 kf shunted by 3 pfds NOTE 1 Attenuators of known accuracy are required Certification is obtainable from Hewlett Packard Contact your nearest Hewlett Packard Safes and Service Office A list of offices is provided at the back of this manual Section Adj Recommended Model hp 141T 85528 8553B 8554B X hp 3580A Option 001 hp 3581A OB 306 O Bit Corp P O Box 2208 Melbourne FL 32901 x hp 105A B x hp 5328A hp 436A hp 8482A 50 Q or hp 8483A 75 Q J903 TT Electronics ine 2214 S Barry Ave Los Angeles CA 90064 hp 3335A hp 8215A hp 11170A hp 111708 hp 11170C x hp 1120A 1 7 Model 3335A SECTION Section H INSTALLATION 2 1 INTRODUCTION 2 2 This section contains instructions for installing and interfacing the Model 3335A Synthesizer Level Generator Included are initial inspection procedures power and grounding requirements line voltage selection environ mental requirements installation instructions HP IB con nection procedure and instructions for repackaging for shipment 2 3 INITIAL INSPECTION 2 4 Inspect the shipping container for damage If the ship ping container or cushioning material is damaged it should be kept until the contents of the shipment have been checked for completeness and the instrument has been checked mechanically and electrically The contents of the
70. tput fre quency by the programmed increment the INCR keys are activated incrementing the frequency either up or down A description of the keys and frequency step display indi cators follows KEYS FREQ INCR Key Preface key for entering frequency increment When pressed the front panel displays the pres ent frequency increment and the controller is enabled to accept new frequency increment data DATA Keys Used to enter the desired frequency incre ment DATA ENTRY Keys Used to finalize the frequency incre ment entry If an increment is programmed that exceeds the maximum the display flashes indicating an illegal entry INCR Keys These keys are used to change the output fre quency by the programmed increment The frequency can be incremented either up or down dependent upon the INCR key activated If an INCR key is held activated the frequency continues to be incremented providing a step fre quency sweep The magnitude of each step is determined by the frequency increment programmed DISPLAY INDICATORS FREQUENCY INCR Indicator Indicates the front panel is displaying the present frequency increment or a frequency increment entry ENTRY INDICATOR Indicates the display holds a fre quency increment entry not yet finalized by a data entry key The numeric display indicates the frequency increment pro grammed Can be displayed in kHz or MHz by pressing the desired range key Example Program a frequency increment
71. tru ment cabinet must not be negated by the use of an extension cord without a protective ground conductor d If this instrument is to be energized via an auto transformer to reduce or increase the line voltage make sure that the common terminal is connected to the earthed pole of the power SOUFCE 2 10 Power Cable 2 11 In accordance with international safety standards this instrument is equipped with a three wire power cable When connected to an appropriate power line outlet this cable grounds the instrument cabinet The type of power cable plug shipped with each instrument depends on the country of destination Refer to Figure 2 1 for the part numbers of the power cable plugs available Rev A 2 1 Section H 8120 1369 8120 1689 8120 0698 7 STS B 4195 GE LISTED FOR USE IN TRE UNITED STATES OF AMERICA Figure 2 1 Power Cables 2 12 HP 1B Connections 2 13 Interconnection data concerning the rear panel HP IB connector is provided in Figure 2 2 This connector is com patible with the hp 10631 A B or C HP IB Cables With the HP IB system you can interconnect up to fourteen including the controller HP IB compatible instruments The HP IB Cables have identical piggyback connectors on both ends so that several cables can be connected to a single source without special adapters or switch boxes You can interconnect system components and devices in virtually any configuration you desire
72. use as a reference signal for other equipment 1 11 Frequency and amplitude can be selected manually from the keyboard or externally when connected to the Hewlett Packard Interface Bus HP IB A programmable device such as a programmable calculator is capable of re motely controlling the Synth sizer Level Generator from the HP IB When operated in this mode keyboard inputs are disabled 1 12 SPECIFICATIONS 1 13 Table 1 1 is a complete list of the Model 3335A critical specifications that are controlled by tolerances Any changes in specifications due to manufacturing design or traceability to the U S National Bureau of Standards are included in Table 1 L of this manual Specifications listed in this manual supersede all previous specifications for the Model 3335A 1 14 GENERAL OPERATING INFORMATION 1 15 Table 1 2 contains general information describing the major operating characteristics of the 3335A This informa tion does not constitute specifications but is supplemental operating information 1 1 Model 3335A Section I os es CO sA Ze EGU Oe SHG eee BESET ee ee iS ss Figure 1 1 hp 3335A With Supplied Accessories Les 1 2 Model 3335A 1 16 OPTIONS 1 17 There are both equipment options and accessory options available with the 3335A Synthesizer Level Gener ator All options are designated by a three digit number The first digit of the option number identifi
73. ve internal storage and must be held in the low state as long as remote opera tion is required Once the 3335A has been put into the Model 3335A REMOTE mode of operation it can be unaddressed and it will remain in REMOTE operation until the REN line is released or the LOCAL key is pressed 3 73 When the REN line is low and the 3335A is addressed the instrument goes into the REMOTE mode and the following things take place a The front panel REMOTE annunciator lights b The front panel controls ex ept POWER and the impedance switch are disabled When addressed to listen the 3335A will accept REMOTE instructions c The output parameters established by keyboard con trol in the LOCAL mode are retained in the REMOTE mode until remotely changed 3 74 When the HP IB system controller releases the REN line the following things take place a The front panel REMOTE annunciator goes out and the 3335A output parameters remain as last programmed in the REMOTE mode of operation b The 3335A will no longer respond to remote instruc tions It will respond to its listen address and the unlisten command 3 75 Addressing to Listen All instruments using the HP 1B share a common set of data and control lines because they are connected in parallel Since the system controller must be able to communicate with individual instruments on the bus each instrument is given a unique address The address is a 7 bit ASCII character by
74. ved when the 3335A controller has only time to service the interrupt requests At this point the 3335A controller cannot properly service the basic instrument The following symptoms can occur display completely or partially blanks a keyboard entry is not recognized sweep output is not linear and the auto single 10 or 50 second sweep in the sweep mode exceeds the time interval 3 91 Telecommunications 3 92 There is an amplitude blanking feature and a special sweep feature which make the hp 3335A especially suit able for applications in the telecommunications industry These features are standard and appear on all instruments On instruments equipped with Options 002 003 or 004 the special sweep is switch selectable Each feature is de scribed separately in the paragraphs that follow 3 146 Rev A Model 3335A NOTE No instrument with a serial number below 1604A00376 is equipped with a TELECOM MUNICATIONS SWEEP Switch 3 93 Amplitude Blanking This feature causes the output amplitude to be blanked for 20 msec whenever a new fre quency is entered or whenever the INCREMENT or DE CREMENT controls are actuated Since the amplitude is blanked no signal will appear at the output during the time that the frequency is changing This allows the instrument to be stepped from one channel to another without gener ating spurious signals that might interfere with operating channels Amplitude Blanking is implemented by modifing
75. ving the GO TO LOCAL command GTL 001 Octal ASCII SOH d By turning the instrument off 3 80 HP IB Bus Commands The Bus Commands are divided into three categories a Unaddress Commands UNL and UNT b Universal Commands LLO DCL SPE ete c Addressed Commands SDC GTL GET etc The 3335A will not respond to all of the bus commands Its operation is unaffected by a command it does not recog nize The commands it will respond to are UNL Unlisten LLO Local Lockout DCL Device Clear SDC Selective Device Clear and GTL Go To Local Each of these com mands is listed above following its respective command category 3 81 PROGRAMMING 3 82 Programming of the 3335A functions is by means of data messages sent by the system controller over the HP IB Table 3 5 Programming Codes ASCII Octa Decimal Hexadecimal KEY Character Code Code Code 83 53 STORE S 123 RECALL R 122 82 52 FREQUENCY F 106 70 46 FREQ INCR l 111 73 49 AMPLITUDE A 101 65 41 AMPTD INCR l 111 73 49 G INCR p 120 80 50 SWEEP WIOTH w 127 87 57 DISPLAY LAST L 114 76 4c ENTRY o o 060 48 30 1 1 061 49 31 2 2 062 s0 32 3 3 063 51 33 i 4 4 064 52 34 5 5 065 53 35 6 6 066 54 36 7 7 067 55 37 8 8 070 56 38 9 3 071 57 i 39 056 46 2E BACK SPACE B 102 66 42 CLEAR C 103 67 8 MHz dBm M 115 7 40 kHz dBm K 113 75 4B Hz deg H 1100 72 48 INCR U 125 85 55 INCR 4 D 104 68 44 GOTO S
76. y can be finalized by pressing a DATA ENTRY key Example Preset the following operating parameters in storage register 2 FREQUENCY 2 MHz AMPLITUDE 2 dBm FREQ INCR 200 Hz AMPTD INCR 0 2 dBm INCR 2 degrees SWEEP WIDTH 2 kHz Preset the following operating parameters in storage register 3 FREQUENCY 3 MHz AMPLITUDE 3 dBm FREQ INCR 300 Hz AMPTD INCR 0 3 dBm INCR 3 deg SWEEP WIDTH 3 kHz First program all parameters then press STORE 2 NOTE In the examples for STORE 2 and STORE 3 different parameters are displayed when the STORE key is pressed to preset the register SWEEP WIDTH is displayed when STORE 2 is pressed 6 INCR is displayed when STORE 3 is displayed In the next two examples the RECALL function is illustrated When data is recalled from a preset register the parameter displayed when that register was preset is the parameter returned to the display In the case of RECALL 2 SWEEP WIDTH will be returned to the display All other parameters will be changed to that preset in register 2 For the RECALL 3 case INCR will be returned to the display All other parameters will be changed to that preset in register 3 Recall parameters of register 2 by pressing RECALL 2 Result Display indicates SWEEP WIDTH of 2 0 kHz When this set of parameters was stored SWEEP WIDTH was last displayed When recalled the parameter last displayed at STORE is returned to the display 3 7 Section I Check the o

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