HP 3330A User's Manual
Contents
1. OPERATING AND SERVICE MANUAL MODEL 3330A B AUTOMATIC SYNTHESIZER 3330A Serial No 1301400203 and Greater 3330B Serial No 1313 A01161 and Greater IMPORTANT NOTICE Any changes made in instruments with serial numbers greater than those stated on this title page will be noted on a change sheet supplied with this manual If the serial number of your instrument is lower than that stated above the manual can contain revisions that do not apply to your instrument Backdating information located in Section VIII adapts this manual to these instruments WARNING To help minimize the possibility of electrical fire or shock hazards do not expose this instrument to rain or excessive moisture Manual Part No 03330 90002 Microfiche Part No 03330 90052 Copyright Hewlett Packard Company 1972 P O Box 301 Loveland Colorado 80537 U S A Printed December 1976 HEWLETT ili PACKARD CERTIFICATION Hewlett Packard Company certifies that this instrument met its published specifications at the time of shipment from the factory Hewlett Packard Company further certifies that its calibration measurements are traceable to the United States National 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 AND ASSISTANCE This Hewlett Packard product is warranted against defects in materials and workmanship f2. Display is always in Hz When range key is pressed the decimal point is automatically placed for a Hz readout Any digit below the tenth Hz digit is automatically rejected by the 3330A B Model 3330A B Example Program a frequency of 5 MHz and a frequency step of 1 MHz Press FREQ Press 5 digit Press MHz Press FREQ STEP Press 1 digit Press MHz Section HI 3 11 Amplitude 3 12 In the 3330A a OdBm to 13 dBm front panel potentiometer is used to select the desired amplitude level In the 3330B the front panel keyboard is used to select any amplitude level from 86 55 dBm to 13 44 dBm with a resolution of 0 01 dB The controls used to program a desired amplitude in the sequence they are selected are AMPL 0 through 9 digit keys and dBm or dBm A LEVELING switch is provided to control the flatness of the amplitude A description of each control and indicator follows Controls 3330B only Amplitude level control The frequency re EEL Na sponse of the 3330B is controlled by a Pi ret thermopile in the amplitude section The Q thermopile will respond to the peaks of the output sinewave if the programmed fre quency is less than 10 Hz To prevent this the LEVELING control should be in the OFF position This position removes the thermopile from the leveling loop For fre quencies between 10 Hz and 1 kHz addi tional filtering is added to eliminate the thermopile from reacting to the peaks of t
3. 3 32 The transients encountered in the 3330A B output as 0MHz Reference Oscillator 20MHz 0 014 244kHz f 100 Det ctor f f 0 01f 1 4 0 014 23 344MHz Summing Loop 3 SL3 100kHz Digital Inputs From Controfler 3 9 011 0 00014 gt 100 Model 3330A B a result of freguency switching freguency step or sweep for example are related to the freguency changes in the N and Summation Loop circuits The severity and dura tion of the transients are a function of the magnitude and significance of the digits being switched The simplified block diagram in Figure 3 7 shows how the frequency digits are added in each loop to obtain the final output fre quency From this it can be seen that the transients of phase lock loop 1 and summation loop 1 translate directly to the output while transients resulting in the other loops are reduced in proportion to the frequency division Figure 3 8 shows three examples of frequency switching transients 3 33 Amplitude Switching 3 34 The nature of transients introduced by amplitude switching depends on whether or not the step attenuator is involved For example when stepping from 3 44 to 3 45 dBm during an amplitude sweep the step attenuator goes from 10 to 0 dB while the leveling loop electronic attenuator goes from 0 00 to 9 99 dB The resulting behav ior is shown in Figure 3 10 3 35 An open loop reset signal enables the electronic attenuator t
4. C 50H ae gt 86 55 dBm Where A frequency or amplitude B SWEEP STEPS C frequency step or amplitude step When sweeping frequency 1 2 the total sweep width formula i formula 2 cannot exceed 10 MHz or the 3330A B will OUT OF RANGE A description of the controls used to program a desired sweep and the indicators used for sweep follows Model 3330A B Controls TIME STEP MIN MAX GER EREGUENSY Function switch selects function of sweep Direction switch Selects the direction of sweep Used in conjunction with FIRST POINT to find the minimum and maximum frequency or amplitude When in UP posi tion sweep starts at minimum frequency or amplitude and sweeps to maximum fre quency or amplitude When in DOWN posi tion sweep starts at maximum frequency or amplitude and sweeps to minimum fre quency or amplitude When in BOTH posi tion sweep starts at minimum frequency or amplitude sweeps to maximum and back to minimum SWEEP TIME STEP Selects time for each step when sweeping or modifying frequency or amplitude Can be changed during sweep SWEEP STEPS Selects number of steps in each sweep Must be considered when select ing frequency step or amplitude step Convenience key This key when used in conjunction with the SWEEP direction switch causes the 3330A B to display and output the starting point of the sweep selected If the SWEEP direction switch is in the UP or BOTH position the d
5. are in a seven bit parallel ASCII code Each control has an ASCI code assigned to it Timing Maximum of 310 usec per digit to enter digits of frequency or amplitude Maximum of 1 msec to enter and initiate program control codes Maximum of 2 5 msec to enter and initiate sweep or calculate and output FIRST POINT input Control Lines 7 program data lines t remote enable line 1 data valid line Output Controt Lines 1 not ready for data tine 1 data not accepted fine i isolation Isolation of the input and output control line grounds with respect to the 3330A B output signal ground is available with Option 004 Logic Level Requirements State Low Logical 1 High Logical 0 Requirements OVto04 V 5 mA max or contact closure to ground through lt 80 ohms 24 V to 5 V or removal of contact closure to ground Outputs Rear panel output Rerouting of internal cable from front panel output to rear panel ALT OUTPUT female TRIAX connector yields rear panel output No degradation of performance for rear panei output Auxiliary Output 20 to 33 MHz tracking output that is always 20 MHz above front panei output available at rear panei female BNC connector Voltage is gt 100 mV rms 50 ohms 1 MHz sine wave reference output is available at rear panel female BNC connector Voltage is gt 220 mV rms 50 ohms Digital Output Digital signals available at rear of instrument to i
6. given 1 3 SPECIFICATIONS 1 4 Table 1 1 is a complete list of the Model 3330A B critical specifications that are controlied by tolerances Table 1 2 contains general information that describes the operating characteristics of the 3330A B 1 5 Any change in the specifications due to manufactur ing design or traceability to the U S National Bureau of Standards will be covered by a manual change sheet This manual and manual change sheet supersede all previous information concerning specifications of the 3330A B 1 6 DESCRIPTION 1 7 The hp Model 3330A B Automatic Synthesizer provides accurate and stable frequencies from 0 1 Hz to 13 000 999 9 Hz with a resolution of 0 1 Hz Digital sweeping of frequency is standard on both the 3330A and 3330B Selection of frequency and frequency sweep is accomplished by a front panel keyboard 1 8 With the 3330A the output amplitude is selected by a 0 13 dBm potentiometer Maximum output voltage for both the 3330A and 3330B is 1 V rms into 50 ohms The 3330B output amplitude is selected by the front panel keyboard Output amplitude capability is 13 44 dBm to 86 55 dBm with a resolution of 0 01 dB Digital sweeping of amplitude is also available on the 3330B 1 8 OPTIONS 1 10 The following options are available with the 3330A B Synthesizer Option 001 75 ohm 1 V rms output 002 High stability Crystal Oven 003 Deletion of Crystal Oven 004 Isolated Digital Input 005 5
7. 00 0 Hz Set SWEEP direction to desired position Press AMPL Press 1 3 4 4 digits Press dBm Press START CONT for continuous sweep or START SINGLE for single sweep 3 17 Inputs and Outputs 3 18 The 3330A B front and rear panel inputs and outputs include front panel SWEEP OUTPUT and 5002 OUTPUT rear panel BCD OUTPUTS optional ALT OUTPUT RF 420 MHZ OUT 1 MHZ OUT REF TUNE IN EXT REF IN AM IN REMOTE CONTROL Explana tions of these inputs and outputs are as follows ak jl Naa OUTPUT Ka Boc courier AMIR ALT OGTPUT 3 20 33MHr OUT 1 saths OUT SEE MANGUN FOR AN RICT INS GEENREIKG REST REF TUNE iN 2 EXT RES IN 00 6 SPEC ihi CONNECTiCNS REMOTE CONTROL REF OSC mop 3330A B Controller which sets the 3330A B frequency and amplitude is available at this connector There are 33 lines of frequency information and 16 lines of amplitude infor mation plus 1 ground line See Section IV for information concerning BCD signals This output available by request only Amplitude Modulation Input An external anan signal can be applied to this connector to sain RSENS amplitude modulate the 3330A B signal PST bitaw Model 3330A B 3330A A dc to 100 kHz signal may be used to amplitude modulate the 3330A signal Percent of modualtion is pro portional to the AMIN voltage 0 95 V rms for 95 modu lation 0 01 V rms for 1 modulation The 3330A front panel amplitude contr
8. 0A B Section III SECTION il OPERATING 3 1 INTRODUCTION 3 2 This section contains information and instructions necessary for operation of the hp Model 3330A B Automatic Synthesizer Included is power and warm up information functional identification of all indicators controls and connectors front panel programming informa tion remote programming information and special applica tions information 3 3 POWER WARM UP 3 4 The 3330A B can be operated from any source of 115 V 10 or 230V 10 at 48 to 66 Hz The power receptacle on the rear panel contains the switch for selecting 115 V or 230 V and the input power fuse The instrument leaves the manufacturer with the switch in the 115 V position It is necessary to set the 115 V 230 V switch to the 230 V position when operating from a 230 V source The 3330A B has a two position standby and on power control on the front panel The instrument takes lt 15 seconds to reach full specification from the STBY position to the ON position The instrument takes lt 20 minutes to reach 1 x 10 of full frequency specifications from the application of external power to the ON position Controls oes Preface key for entering frequency The ro FREQ key can be pressed at any time to s recall the previous freguency entry KOT kale mma 080 Digit keys These keys are used to enter the m desired freguency digits INSTRUCTIONS 3 5 OPERATION 3 6 Fr
9. 14 V peak to peak 5 V rms for Option 005 The broken line curve of Figure 3 1 can be used to deter mine the carrier level out of the 3330B for a given percent of modulation The vertical axis labeled K represents the dB loss in carrier level due to the modulating voltage Subtract this reading from the 3330B front panel amplitude setting to find the output carrier level ALT OUTPUT 3330A B rear panel triaxial output jack Reguires internal cable change from front panel output jack Holes for special purpose jacks See Para graph 3 24 Output from Freguency Generating section of 3330A B Tracks front panel output with a 20 MHz offset Output voltage gt 100 mV rms 50 ohms O 20 33M2 OUT 1 MHz output from 20 MHz VCXO Refer ence Output Voltage gt 220 mV rms 50 ohms REF TUNE IN INTO ERT AEF TUNE A sO EKT REF iN REMOTE CONTROL i Section IH Reference input for tuning Reference Oscill ator and Internal Reference Oscillator Ad just With rear panel REF TUNE control in INT position position 3330A B 5 Vdc changes freguency a maximum of 0 5 to 1 x 1077 of frequency at O Vde 5 Vdc changes freguency a maximum of 0 7 to 1 5x 107 of freguency at 0 Vdc With rear panel REF OSC in EXT position standard 3330A B and no external reference applied 5 Vdc changes frequency a nominal 4x 10 of frequency at O Vdc With REF OSC in INT position the REF TUNE IN is applied to
10. 60 STEP READY 10 2 Ot M 400 4 i i 13G STEP INHIBIT K lt _ 0 jak NOPEA i oi BOO 5 z LC f s REMOTE ENABLE 6 ro dal ARE LOW oy 18 00 6 REMOTE DATA INPUT BIT 4 oo a 10 SWEEP Ji t NOT READY FOR DATA H lo OSS al S 20 PAP AMETER INPUTS ae A E OUTPUTS NOT DATA ACCEPTED 7 paaa Pa i Oh Tm P mm AO 5 5 ES DATA INPUT BIT 3 3 sence la 13 e BO bo DATA INPUT BIT 2 B PP AL i oy 6nd i 6 DATA INPUT BIT 1 2 LAAL aaa aa 12 t 3 DATA INPUT BIT 5 4 lt eo Ca aaa AP e 2 3 4 2 DATA INPUT BIT 6D E p gt s 4 4 i i Ti DATA INPUT BIT 7 5 Eo Gui T T S o B tus l I NG DATA VALID FC nl Cs Ba 3330 8 2888 Figure 3 2 HP IB Remote input programmed from the front panel If more than one instru l Tabie 3 2 Addressing Codes ment is paralleled on the same HP IB it is necessary to clear the line before addressing another instrument The code for clearing the HP IB is given in Table 3 1 A timing diagram for the output control lines is shown in Figure 3 4 A brief explanation of the timing functions is included with the figure 3 24 Special Connectors 3 25 The 3330A B has been designed with several special interfacing possibilities available These special connections allow interfacing with complementary equipment to in crease the flexibility of the 3330A B The connections include an output from the 20 MHz VCXO an output from N4 loop VTO an input to the SL3 loop Phase D
11. OW Switching Command b The switch from 10 099 MHz to 10 000 MHz a full range tran sition for the second N has a transient that lasts for well under one millisecond Switching Command c The switch from 100 005 kHz to 12 999 999 5 MHz repre sents worst case transient in volving near maximum transition for all loops In a and b 10 MHz has been subtracted from the output so that the transients can be more readily seen and in c 12 999 999 5 MHz was subtracted from the output In all examples the oscilloscope sweep speed was 0 2 ms cm Figure 3 8 Frequency Switching Transients 1 Transients This display shows a 10 step amplitude sweep centered at 3 45 dBm where the 10 dB step attenuator switches and introduces amplitude transients The amplitude steps are 0 2 dB 100 ms each Oscilloscope sweep speed 200 ms cm Figure 3 9 Amplitude Switching Transients 3 13
12. V rms into 50 ohm Output Power Amplifier 908 Rack Mounting Kit 910 Additional Operating and Service Manual 1 11 For more information concerning these options contact your local hp Sales and Service Office listed in Appendix B of this manual Table 1 1 Specifications 3330A B FREQUENCY SECTION Frequency Stability Longterm 1x 108 per day 21x10 per month Temperature 20 C to 30 C 1 x 198 of frequency at 25 C 00C to 55 C 1x 10 of frequency at 25 C Signal to phase noise integrated gt 50 dB down in a 30 kHz band excluding 1 Hz centered on carrier Harmonic Distortion With full output amplitude any harmonically related signal will be fess than the following specified levels 60 dB with output from 5 Hz to 100 kHz 50 dB with output from 100 kHz to 1 MHz 40 dB with output from 1 MHz to 13 MHz Spurious 3330A gt 70 dB below selected output 3330B gt 70dB below selected output or less than 110 dBm 50 2 whichever is greater 3330A AMPLITUDE SECTION Amplitude Maximum 2 Vrms 10 open circuit Maximum 1 Vrms 10 into 50 ohms Frequency Response 10 kHz Reference 0 5 dB over total range 3330B AMPLITUDE SECTION Amplitude 10 kHz Reference 25 C 45 C 13 44 dBm 2 1 V rms open circuit 0 5 0 05 dB 1 05 V rms into 50 ohms 0 5 0 05 dB Attenuator Accuracy 10 kHz Reference 0 02 dB 10 dB step Sweep Output Stepped dc voltage proportional to
13. dicates the instrument has spent the prescribed time on one step and is ready to go to the next step A step inhibit line is also availabie When this line is grounded the instrument will stop sweeping on that step Figure 3 2 shows the input output connector pin numbers and signal inputs outputs for remote input and sweep output 3 7 Model 3330A B Section HI NOLYINGOWG 1682 8 Voeee 0 Fb ta Sang Palit ARTE Lip 97 HH ann lt z 8 AHEHE F FHH AEAT 2H BEE BERR NOLYINGON JO 6341534 maluho Y HOS OBYINOBY ONLL13S 9P AHL i a a Si SIHL S1VOST1Nd MOTIS 8P ti 7 t mh JHL AINISAYdIN SIAHNOI ANIT Ol p Fli pamang NI WY py nae Figure 3 1 AMIN 3 8 Model 3330A B Indicates instrument is in remote pro gramming mode 3 19 Remote Hewlett Packard Interface Bus HP IB Programming 3 20 The 3330A B can be remotely programmed using a seven bit ASCII character format An octal code is used to identify each HP IB programming instruction Table 3 1 lists the inst
14. directly to right are amplitude step f AMPLITUDE Indicates selected amplitude step digits Digits are entered from right as amplitude digit keys are pressed 3 4 Model 3330A B AMPLITUDE STEP Example Program an amplitude of 30 00 dBm and an amplitude step of 5 00 dBm Press AMPL Press 3 0 digits Press dBm Press AMPL STEP Press 5 digit Press dBm or dBm 3 15 Frequency and Amplitude Sweep 3 16 The 3330A B frequency and the 3330B amplitude can be swept over a specific range The sweep is a digital sweep which steps the frequency or amplitude to each point The sweep controls include the function switch FREQ AMPL direction switch UP DOWN BOTH SWEEP TIME STEP switch SWEEP STEPS FIRST POINT START SINGLE and START CONT To use the sweep mode a frequency and a frequency step or an amplitude and an amplitude step must be programmed In choosing the frequency or amplitude and the size of the frequency step or amplitude step the frequency and amplitude limits of the 3330A B should be considered along with the position of the SWEEP STEPS control The number of steps chosen will be divided evenly on either side of the frequency or amplitude If the frequency step or amplitude step is too large the 3330A B will OUT OF RANGE and the sweep will stop Use the following formula to determine if the settings chosen will OUT OF RANGE the 3330A B 1 A BRE S 13 0009999 MHz 2 lt 13 44 dBm y ko BE
15. ected the decimal point is automatically placed for a Hz readout Any digit below the tenth Hz digit is automatically rejected by the 3330A B Error indicator Indicates a programming ror has been made Selected program is out of range of the 3330A B OUT OF RANGE indicator also applies to frequency step amplitude and amplitude step The 3330A B will sweep although the OUT OF RANGE indicator is lit if the sweep starts from an in range position When the sweep reaches the out of range limit the sweep holds until the last step of the sweep OUT OF RANGE Model 3330A B Example Program a frequency of 12345678 9 Hz Press FREQ Press 1 2 3 4 5 6 7 8 9 digits Press Hz 3 9 Frequency Step 3 10 The frequency step function is used when it is desired to sweep a certain range of frequencies or when it is desired to manualiy change the frequency by a specific amount The controls used to program a frequency step in the sequence they are selected are FREQ STEP O through 9 digit keys and Hz KHz or MHz range keys There are also six modifier keys which can be used to modify the programmed frequency or the programmed frequency step A description of each control and indicator follows Controls Preface key for entering frequency step The FREQ STEP key can be pressed at any time to recall the previous frequency step entry Ng Digit keys These keys are used to enter the desired frequency ste
16. etector and an input to the Mixer in the Output Section 3 26 The special 20 MHz output when connected will 3330A 65 2882 A6 Figure 3 3 Addressing Jumpers 3 10 Model 3330A B Section III ATN Attention data lines address data program data DAV DATA VALID From Comp Indicates to 3330 that da Indicates to 3336 that da ta is available ta is available iNRFD NOT READY FOR DATA indicates 3330 is busy and indicates 3330 is busy and indicates 3336 will accept will net accept any mare Indicates 3330 will accept will not accept any more more data data more data data i From 3339 initiated by data valid NDA indicates 3330 is finished indicates 3330 is pro Indicates 3330 is finished Indicates 3330 is pro NOT DATA ACCEPTED processing data cessing data processing data cessing data 33304 B 2883 Figure 3 4 HP IB Timing Diagram AUTOMATIC SYNTHESIZER hp 3330B hp 10534 SWEEPING SIGNAL GENERATOR SPECIAL NAVTO OUTPUT CONNECTOR ESE MARKER SPECIAL SLI INPUT CONNECTOR TTL 2 3MHz 2N 3904 3223GAR 8 298G Figure 3 5 Special N4 Loop and SL3 Loop Connectors AUTOMATIC SYNTHESIZER FREQUENCY SYNTHESIZER hp 3330B hp 3320B 20 33MHz OUT A a Esos OUTPUT SPECIAL RANGE DIVIDER INPUT CONNECTO SPECIAL MIXER INPUT CONNECTOR N RANGED 33304 B _ ALTERNATE OUTPUT SIGNAL f Figure 3 6 Special Mixer Input Connector 3 11 Section HI supply the 20 MH
17. followed by the address of the instrument to be programmed Once the instrument has been addressed it can be programmed by issuing the proper Table 3 1 3330A B HP IB Programming Codes Key Switch ASCH Octal Key Switch ASCII Octal Position Character Code Position Character Code Ampl A 116 Ampi Step 117 Address Freg F Freg Step dBm 073 dBm 074 2t A 0 0 Leveling Off 137 1 1 Leveling Slow 135 2 2 Leveling Fast 4 136 3 3 4 4 Ampl Step X10 i 042 5 5 Amp Step 10 043 6 6 Ampl Step X 2 amp 046 7 7 Amp Step 2 i 047 8 8 Ampl 4 051 9 9 Ampi 050 Ampl Sweep Mode Cc 103 Hz 1 ms Step P 120 kHz 3 ms Step a 121 MHz 10 ms Step R 122 30 ms Step S 123 Freg Step X10 100 ms Step T 124 Freq Step 7 10 300 ms Step U 125 Freq Step X2 1000 ms Step V 126 Freq Step 2 3000 ms Step W 127 Freg 4 Stop xX 130 Freq y Start Cont Y 131 Freg Sweep Mode Start Single 133 First Point Z 132 Sweep U kk Cigar 077 Sweep Down Ha ae Address and clear must be accompanied by teps an ATN On 3260A Card Reader ATN 100 Steps SWP 200 address 244 Clear 277 1000 Steps SWP given an individual address which only that instrument commands in the same manner as the instrument is 3 9 Section IH Model 3330A B REMOTE INPUT OUTPUT A34 03330 86529 12 ot ATTENTION 8 kumaha Oln N 100 SWEEP 1 Ko 1 i oi P 2 2
18. h 9 digit keys and dBm or dBm There are also six modifier keys which can be used to modify the programmed amplitude or the programmed amplitude step A description of each control and indicator follows 3 3 Section III Controls Preface key for entering amplitude step The AMPL STEP key can be pressed at any time to recall the previous amplitude step entry Digit keys These keys are used to enter the desired amplitude step digits If the ampli tude step is used in conjunction with the Sweep function it is necessary to consider the position of the SWEEP STEPS control in relation to the size of the amplitude step see Paragraph 3 15 agg Amplitude polarity keys The polarity keys complete the programming of amplitude step Amplitude modifier keys These keys can be used to modify the amplitude or the ampli tude step To modify the amplitude press the AMPLt or AMPL key The ampli tude will change by the amount of the amplitude step If the AMPLf or the AMPL t is pressed and held the amplitude wil change at the rate of the TIME STEP Paragraph 3 15 until the key is released To modify the amplitude step press the AMPL STEP x 2 AMPL STEPx 10 AMPL STEP 2 or AMPL STEP 10 key Modification of the amplitude or the amplitude step can be made at any time If made during the sweep mode the modification will occur at the end of each sweep cycle indicators Indicates that the digits displayed
19. he output amplitude For frequencies above 1 kHz the additional filtering is removed to decrease the settling time of the output amplitude Do not use the FAST gt 1 kHz position for frequencies less than 1 kHz or the SLOW gt 10 Hz position for frequencies less than 10 Hz or the 3330B flatness and distortion specifications may be degraded Preface key for entering amplitude The AMPL key can be pressed at any time to recall the previous amplitude entry GG OM keys These keys are used to enter the MM pex amplitude digits LEVELING A ORE P19 g PEN BY TART Obtainable only with Option 5 instrument Amplitude polarity keys These keys com plete the programming of an amplitude The amplitude desired is displayed and applied to the 3330B output Indicators 3330B only Indicates that the digits displayed directly to right of indicator are amplitude Indicates selected amplitude digits Digits are entered from right as amplitude digit keys are pressed Example Program an amplitude of 12 34 dBm Press AMPL Press 1 2 3 4 digits Press dBm 3 13 Amplitude Step 3330B only 3 14 The amplitude step function is used when it is desired to sweep a certain range of amplitude or when it is desired to manually change the programmed amplitude by a specific amount The controls used to program an ampli tude step in the sequence they are selected are AMPL STEP O throug
20. icated by an arrow Only one arrow will be illuminated Program a continuous frequency sweep from 0 Hz to 25 kHz Use maximum steps allowed Set amplitude for 13 44 dBm Steps are divided equally on either side of frequency therefore frequency 25 kHz 2 12 5 kHz Maximum SWEEP STEPS 1000 therefore Frequency Step 25 kHz 1000 25 Hz To insure the sweep end points MIN MAX FREQUENCY are not OUT OF RANGE A me 1000 x 25 Hz _ 12 5 kHz 5 3 5 Section III 12 5 kHz 12 5 kHz 25 kHz MAX FREQUENCY A S 195 kHz A 25 Hz _ 12 5 kHz 12 5 kHz 0 Hz MIN FREQUENCY Set LEVELING to OFF Press FREQ Press 1 2 5 digits Press kHz Press FREO STEP Press 2 5 digits Press Hz Set SWEEP mode to FREQ Set SWEEP STEPS to 1000 Set SWEEP TIME STEP to desired time step Set SWEEP direction to UP Press FIRST POINT Display should indicate a MIN SWEEP OUTPUT oTOucy Provides a stepped de output from 0 Vdc to 10 Vde Number of steps and time for each step are controlled by the SWEEP STEPS control and the SWEEP TIME STEP control respectively Each step represents the same step in the frequency or amplitude sweep OLTELT Hat o 3330A B front panel output i n A Special BCD output The BCD freguency and amplitude information from the Model 3330A B FREQUENCY of 0 Hz Set SWEEP direction to DOWN Press FIRST POINT Display should indicate a MAX FREQUENCY of 250
21. ion at the factory Refer to Figure 2 1 for the procedure to change your instrument for operation on 230 V STO B 4732 2 7 GROUNDING REQUIREMENTS 2 8 To protect operating personnel the National Electrical Manufacturers Association NEMA recommends that the instrument panel and cabinet be grounded The Model 3330A B is equipped with a three conductor power cable which when plugged into an appropriate receptacle grounds the instrument The offset pin on the power cable is the ground wire Your instrument is equipped with a power cord which grounds it when connected to a 3 con tact grounded receptacle Do not attempt to defeat this feature 2 9 ENVIRONMENTAL REQUIREMENTS 2 10 The 3330A B is equipped with a cooling fan mounted on the rear panel The instrument should not be mounted in any manner which would obstruct the flow of air through the instrument The filter for the cooling fan can be removed and cleaned by flushing with soapy water The 3330A B should not be operated where the ambient temperature exceeds 0 C to 55 C 32 F to 131 F or stored where the ambient temperature exceeds 40 C to 70 C 40 F to 158 F Operating voltage is shown in module window SELECTION OF OPERATING VOLTAGE 1 Open cover door and rotate fuse pull to left 2 Select operating voltage by orienting PC board to posi tion desired voltage on top left side Push board firmly into module slot 3 Rotate fuse puli back i
22. isplay and 3330A B output will go to the minimum starting point frequency or amplitude in the sweep range If the SWEEP direction switch is in the DOWN position the display and 3330A B output will go to the maxi mum starting point frequency or ampli tude in the sweep range If FIRST POINT key is pressed while the sweep is in progress the sweep will stop Display and 3330A B output will go to the starting point of the sweep range 8 a ial Indicators CTR MIN MAX Example Section III MIN MAX SWEESING CER AMPLITUDE SWEEP scenery Start key for single sweep When pressed 3330A B will make one complete sweep Start key for continuous sweep When pressed instrument will sweep the par ameters selected until stopped Stop sweep key Stops sweep and returns instrument display and output to center frequency or amplitude Indicates that the digits displayed directly to the right of CTR FREQUENCY indicator or CTR AMPLITUDE indicator are the fre quency or amplitude digits selected This indicator operates only when continuous sweep is in progress and the FREQ key or AMPL key has been pressed Indicates that the digits displayed directly to right of MIN or MAX FREQUENCY or MIN or MAX AMPLITUDE indicators are starting point digits of sweep Display is dependent on SWEEP direction control and FIRST POINT key Indicates sweep is in operation Function swept frequency or amplitude is ind
23. ndicate various frequency or amplitude sweep parameters inciudes Step Count O to 1000 count on 12 BCD 8 4 2 1 lines to indicate sweep position e g count of 500 indicates center frequency or ampiitude Sweep Status One line to indicate when instrument is sweeping Step Ready One iine indicates the instrument has spent the selected time per step and is ready to go to the next step Step Inhibit One line which when grounded stops sweep on that step Sweep Digita sweeping of both frequency and amplitude in the 3330B and freguency in the 3330A When sweeping frequency automat icaliy the total sweep width may be as large as the entire frequency range or as smali as 1 Hz When sweeping amplitude automatically the total sweep width may be as large as the entire amplitude range or as small as 0 1 dB When sweeping frequency each step of the frequency has the same stability as the frequency reference GENERAL Operating Temperature O C to 55 C Storage Temperature 40 C to 70 C Turn on Time Application of power to On lt 20 min to within t 1 x 107 of the finat frequency Standby to On lt 15 seconds to full specifications Power requirements 115 V or 230 V 10 48 Hz to 66 Hz 400 Hz line frequency operation on special basis lt 20 W standby lt 200 Won Weight 3330A 49 Ib 22 1 kg shipping 58 lb 26 4 kg 33308 53 ib 24 0 kg shipping 63 Ib 28 6 kg Dimen
24. ng material around all sides of instrument and protect panel face with cardboard strips Model 3330A B c Place instrument and inner container in a heavy carton or wooden box and seal with strong tape or metal bands 2 15 POWER CORDS AND RECEPTACLES 2 16 Figure 2 2 illustrates the standard power cord config urations that are used throughout the United States and in other countries The hp part number shown directly below each drawing is the part number for a 3330A B power cord equipped with the appropriate mating plug for that recep tacle If the appropriate power cord is not included with the instrument notify the nearest hp Sales and Service Office and a replacement cord will be provided The 3330A B power cord power input receptacle and mating connectors meet the safety standards set forth by the Inter national Electrotechnical Commission IEC 125 V 6A 250 V GA UL LISTED FOR USE IN THE UNITED STATES OF AMERICA Figure 2 2 Power Cords 2 17 INTERFACING 2 18 The 3330A B can be remotely programmed by any ASCH coded source Section HI Paragraph 3 19 describes the remote input connector and signal requirements Logic level requirements are listed in Table 1 2 General Infor mation Several HP IB programmable units can be paral leled together on the same HP IB lines with the use of the 11236B interface cable or an HP IB adapter 11235A used with an HP IB cable 10631A B or C Model 333
25. nto normal position and re insert fuse in holders using caution to select correct fuse value 115 V 3 0 Amp NB 2110 0003 230 V 1 5 Amp NB 2110 0043 Figure 2 1 Voltage Selection Section I WHEN MOUNTING THE 3330A B IN AN INSTRUMENT RACK CARE SHOULD BE TAKEN TO SUPPORT THE REAR OF THE INSTRUMENT FAILURE TO DO SO MAY CAUSE DAMAGE TO THE INSTRUMENT 2 11 REPACKAGING FOR SHIPMENT 2 12 The following paragraphs contain a general guide for repackaging the instrument for shipment Refer to Para graph 2 13 if the original container is to be used 2 14 if it is not If you have any questions contact your nearest hp Sales and Service Office see Appendix B for office loca tions NOTE If the instrument is to be shipped to Hewlett Packard for service or repair attach a tag to the instrument identifying the owner and indicating the service or repair to be accomplished Include the model number and full serial number of the instrument In any correspon dence identify the instrument by model number and full serial number 2 13 Place instrument in original container with appro priate packing material and seal well with strong tape or metal bands If origina container is not available one can be purchased from your nearest hp Sales and Service Office 2 14 If original container is not to be used proceed as follows a Wrap instrument in heavy paper or plastic before placing in an inner container b Place packi
26. o switch to about 20 of final value within a few milliseconds The remaining part of the transient is governed by the closed loop time constant and is about 35 ms with the front panel LEVELING switch set for FAST or about 350 ms in SLOW The slow response is provided to permit leveling at output frequencies as low as 10 Hz 3 36 When the 3330B is turned on with the LEVELING contro in the OFF or FAST position and subsequently changed to SLOW there will be no output for a period of about six seconds after changing to SLOW It is therefore recommended that when remotely programming the first External Leveli p tist Modulation Circuit 9 011 0 00011 0 00000114 233 44kHz 222 3344kHz fd PER 771 o 12 1223344MHz 22 23344MHz 3 4223344MHz ta 111 1 4 0 014 0 00011 0 000001 20MHz Figure 3 7 Simplified Block Diagram of Frequency Generating Circuits 3 12 Mode 3330A B change to SLOW after turn on a wait of at least six seconds be included in the program This situation does not exist if the control is in the SLOW position when the instrument is Switching Command a A small transient results when switching from 10 000 99 MHz to a full range 10 000 00 MHz transition for the third TN Section IH first turned on nor does it occur after the first change to SLOW Also output is continuous if the instrument is turned on in OFF or FAST and is not changed to SL
27. ol can be varied to adjust the level of the carrier signal without changing the modulation per centage 3330B When an amplitude modulating signal is applied the output power level is a combination of the carrier power and sideband power The 3330B output is monitored by a thermal detector circuit which is a constant power device Therefore when the amplitude modulating signal is applied the carrier level is decreased to maintain a constant power level Conversely if the 3330B front panel amplitude control settings are changed to increase or decrease the car rier level the sideband levels are decreased or increased accordingly It is recommended that an oscilloscope be used at the 3330B output to observe the modulated signal and determine the percent of modulation Because the char acteristics of each instrument are slightly different the curves shown in Figure 3 1 are an approximation of the AM voltage input needed in a standard instrument for the per cent of modulation desired The dB figure of each solid line curve represents the dB level below the highest output of each 10 dB step of the output attenuator For example the 4 dB curve would apply for a front panel amplitude set ting of 9 44 dB 0 56 dB 10 56 dB etc NOTE If the level of the modulated output signal ex ceeds 2 97 V peak to peak as observed on an oscilloscope 1 05 V rms the signal will be degraded because of excessive limiting in the instrument 14
28. ont panel operation of the 3330A B requires select ing keyboard and slide switch controls in various sequences for desired modes of operation The following explanations divide the controls into their functional descriptions fre quency frequency step amplitude amplitude step sweep and their programming sequence When the 3330A B is initially turned on the conditions set on the display and at the output are Prequeney asine bs kasa 0 0 Hz Amplitude icc luisa 86 55 dBm Std Instr Only Frequency Step mutak ee kaa 0 0 Hz Amplitude Step sata 0 00 dBm SWEEP tapa E eee EAE A off Sweep parameters are as set on sweep slide switches 3 7 Frequency 3 8 The frequency range of the 3330A B is OHz to 13000999 9 Hz with a 0 1 Hz resolution The controls used to program a desired frequency in the sequence they are selected are FREQ 0 through 9 digit keys and Hz KHz or MHz range keys A description of each control and indicator follows i OUT OF RANGE Range keys Three ranges are available MHz KHz and Hz These keys complete the programming of a frequency The frequency desired is displayed and applied to the 3330A B output Indicators Indicates that the digits displayed directly to right of indicator are frequency FREQUENCY 3 1 Section HI Indicates the desired frequency selected Digits are entered from right as frequency digit keys are pressed Display is always in Hz When Range key is sel
29. or a period of one year from the date of shipment except that in the case of certain components if any listed in Section I of this operating manual the warranty shall be for the specified period Hewlett Packard will at its option repair or replace products which prove to be defective during the warranty period provided they are returned to Hewlett Packard and provided the proper preventive maintenance procedures as listed in this manual are followed Repairs necessitated by misuse of the product are not covered by this warranty NO OTHER WARRANTIES ARE EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE HEWLETT PACKARD IS NOT LIABLE FOR CONSEQUENTIAL DAMAGES If this product is sold as part of a Hewlett Packard integrated instrument system the above warranty shall not be applicable and this product shall be covered only by the system warranty Service contracts or customer assistance agreements are available for Hewlett Packard products For any assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are provided at the back of this manual poe Model 3330A B Section I SECTION GENERAL INFORMATION 1 1 INTRODUCTION 1 2 This section contains general information about the hp Model 3330A B Automatic Synthesizer A general description plus information on specifications accessories and instrument identification is
30. p digits If the fre quency step is used in conjunction with the Sweep function it is necessary to consider the position of the SWEEP STEPS control in relation to the size of the frequency step see Paragraph 3 15 TT Range keys Three ranges are available Hz KHz and MHz These keys complete the programming of the frequency step Frequency and frequency step modifier keys These keys can be used to modify the frequency or frequency step To modify the frequency press the FREQ 4 or FREQY key The frequency will be changed up or down by the amount of the frequency step If the FREQ or FREQ 4 key is pressed and as PREG rea STEP STEP Ka 210 4 Armani Naman j FREQ all tra Palitan Y ee 3 2 FREQUENCY STER held the freguency will continue to change at the rate of the TIME STEP Paragraph 3 15 until the key is released To modify the frequency step press the FREQ STEP x 2 FREQ STEP x 10 FREQ STEP 2 or FREQ STEP 10 key The frequency step will be changed by the respective amount Modification of frequency or fre guency step can be made at any time If made during the Sweep function modifica tion will occur at the end of each sweep Indicators FREQUENCY Indicates that the digits displayed directly to right of indicator are frequency step Indicates the desired frequency step selected Digits are entered from right as frequency step digit keys are pressed
31. rough 10MHz i e 1 MHz 2 MHz 2 5 MHz 5 MHz 10 MHz BNC femate connector Freguency switching and settling time the time reguired for fre quency switching and settiing is a function of the largest fre gueney digit affected by the frequency change in question 1 2 Largest digit changed 0 1 Hz 19 Hz 100 kHz 1 MHz or t Hz or 100 Hz 500 wHz 0 05 Hz Switching and Settling Time 3330A AMPLITUDE SECTION Amplitude Range O dBm to 13 dBm front panel control Output Impedance 50 ohm 75 ohm Option 001 Amplitude Modulation External modulation source required rear panel BNC DC to 100 kHz signal 0 95 V rms for 95 modulation depth 0 01 V rms 1 depth 33308 AMPLITUDE SECTION Amplitude Range 13 44 dBm to 86 55 dBm into 50 ohms Amplitude Resclution 0 01 dB Output Impedance 50 ohm 75 ohm Option 001 Model 3330A B Section I Table 1 2 General Information Cont d Display Four digit readout in dBm referenced to 50 ohm Display referenced to other impedances on speciat basis or internally adjustable by user to compensate for external attenuation or amplification Amplitude Modulation External modulation source required rear panel BNC 100 Hz to 100 kHz 0 95 V rms for 95 modulation depth LEVELING control must be in SLOW gt 10 Hz position DIGITAL REMOTE CONTROL Ali front panel controls with the exception of POWER and 3330A AMPLITUDE are programmable Programming instruc tions
32. ructions for the 3330A B and their equivalent octal codes In order to exercise maximum capability 12 input lines are required Figure 3 2 shows the HP IB remote input connector pin numbers and the signal inputs for each pin All front panel functions on both the 3330A and 3330B are programmable with the exception of the POWER LINE and 3330A AMPLITUDE 3 21 A major advantage of HP IB programming is the capability of paralleling several 3330A B Automatic Synthesizers or complimentary HP IB programmable in struments to the same input lines Each instrument can be Section II recognizes All 3330A B Automatic Synthesizers leave the factory with an address of 44 but this address can easily be changed To accomplish this a series of jumpers on the Input Assembly A6 of the controller section must be set in a binary fashion which corresponds to the octal code for the address desired Table 3 2 gives the binary number and the corresponding octal code and ASCII character for the different addresses available The 40 bit of the address is hard wired in the instrument Only the 20 10 4 2 1 bits can be changed Figure 3 3 shows the five jumpers for changing the address 3 22 When the 3330A B is initially turned on in the remote mode the conditions programmed are the same as the conditions programmed at turn on when operating from the front panel see Paragraph 3 6 3 23 To program the 3330A B the address preface ATN Attention is given
33. sions 16 3 4 in wide x 7 in high x 21 1 2 in deep 426 x 178 x 547 mm Options 75 Ohm 1 V rms Output Power Amplifier Option 001 Factory instailation only Attenuation and output referenced to 75 ohm Amplitude range 3330A 11 3dBm to 1 7 dBm 33308 11 68 to 88 31 dBm High Stability Crystal Oven Option 002 10 MHz crystal reference in temperature stabilized oven Frequency stability Long term 41 x 10 per day 2x 10 per month Temperature 20 C to 30 C 41 x109 of frequency at 25 C OFC to 4652C 1 x107 of frequency at 25 C Physical orientation 5 x 108 total change in frequency for any physical orientation of instrument with respect to gravity i Frequency adjustments same as standard instrument Field installable order hp Accessory 11452A Deletion of Crystal Oven Option 003 20 MHz ambient temperature crystal reference oscillator Recom mended for applications where only moderate frequency stability is needed or where the 3330A B is to use an external reference 1 3 Section I Model 3330A B Tabie 1 2 General Information Cont d Frequency stability 10 parts in 108 yr Frequency adjustments rear panel 1 turn pot or rear panel voltage controi input for 40 x 107 maximum control Standard Crystal Oven can be installed later Number 0410 0457 order hp Part solated Digital input Option 004 Factory installation only With this option the digi
34. sweep position of frequency or amplitude Oto 10V Accuracy 0 2 of full scale Linearity 0 1 of full scale Section 1 Model 3330A B Table 1 1 Specifications Cont d 3330B AMPLITUDE SECTION Cont d Frequency Response 10 kHz Reference 33308 Attenuator Setting dBm 11 68 to to 18 31 For frequencies above 10 Hz and Leveling in OFF 510 Hz or Leveling FAST gt 1 kHz specification Specification dB Leveling SLOW 510 Hz or Leveling FAST gt 1 kHz position add 0 5 dB to Leveling SLOW Table 1 2 General Information 3330A B FREQUENCY SECTION Frequency Range 0 1 Hz to 13 000 999 9 Hz Frequency Resolution 0 1 Hz 8 digits overrange Internal Frequency Reference 5 MHz crystal in temperature stabilized oven Optional higher stability crystal oven Option 002 or lower stability 20 MHz ambient temperature crystal Option 003 references available Frequency Reference Adjustments 5 MHz VCXO Coarse Interna adjustment adequate for 5 years of aging Fine 1 turn potentiometer on rear panel or 5 Vdc applied to REF TUNE IN and REF OSC switch in INT position 5V 710 15x107 of value at 0 V 65V 5to1x 107 of value at 0 V REF OSC switch in EXT position and no external applied 20 to 40 ppm total adjustment range reference External Frequency Reference The 3330A B may be phase locked with a 200 mV rms to 2 V rms signal that is any subharmonic of 20 MHz from 1 MHz th
35. tal input lines are electrically isolated from the signal ground DC Isolation 250V AC Isolation gt 30 d8 0to 1 MHz 1 12 ACCESSORIES SUPPLIED 1 13 Accessories supplied with the 3330A B are as fol lows One HP IB Adapter hp Part No 11235A One Extender Board hp Part No 03330 66534 One Extender Board hp Part No 03330 66535 One Extender Board hp Part No 03330 66588 1 14 ACCESSORIES AVAILABLE 1 15 Accessories available for the 3330 A B are as follows 11236B Interfacing Cable LL451A Optional Interface Cable Kit 11452A Hi Stability Oven Option 002 11455A 5 V 50 Q Output Option 005 3330 A 11455B 5 V 50 2 Output Option 005 3330B 5060 8744 Rack Mounting Kit 5 V RMS 50 Ohm Output Power Amplifier Option 005 This option gives the 3330A B a 4 2 watt output 5 volts rms into 50 ohms or 10 voits rms into an open circuit Amplitude range 3320A 27 dBm to 14 dBm into 50 ohms 3330B 26 99 dBm to 73 dBm into 50 ohms For field installation order hp Accessory 11455A A model 11455B B model 10631A B C 11048C 11094 HP IB Cables 5092 Feedthrough precision 7592 Feedthrough precision 1 16 INSTRUMENT AND MANUAL IDENTIFICATION 1 17 Hewlett Packard uses a two section serial number The first section prefix identifies a series of instruments The last section suffix identifies a particular instrument within the series If a letter is included with the serial n
36. the 5 MHz VCXO With REF OSC in EXT position the REF TUNE IN is applied to the 20 MHz VCXO If the REF OSC is in the EXT position and an external reference is used the external reference signal overrides the REF TUNE IN With the 3330A B Option 003 the REF TUNE IN has a nominal 4x 10 3 change of frequency at O Vdc if the REF OSC is in the INT position or EXT position with no external reference applied With an external reference applied and the REF OSC in the EXT position the external reference overrides the REF TUNE IN In the 3330A B Option 003 the REF TUNE IN is applied to the 20 MHz VCXO The REF TUNE potentiometer on the rear panel of the 3330A B has the same characteristics as the REF TUNE IN The REF TUNE IN however will override the REF TUNE potentiometer if both are used Input for an external frequency reference The 3330A B 20 MHz VCXO is phase locked to the external oscillator Any sub harmonic of 20 MHz from 1 MHz through 10 MHz at 200 mV to 2 V may be used Remote Control input output The 3330A B can be remotely controlled using a seven bit ASCH character format within the HP IB see Paragraph 3 19 Twelve lines are re quired for remote control Also available at this connector are 15 lines of sweep informa tion A step count 0 1000 on 12 1 2 4 8 BCD lines indicates the sweep position count of 500 indicates center freguency A sweep status line indicates when instrument is sweeping A step ready line in
37. umber it identifies the country where the instrument was manufactured This manual is kept up to date with the instrument by a manual change sheet If the serial prefix of your instrument differs from the one on the title page of this manual refer to Section VIH for backdating informa tion that will adapt this manual to your instrument Ali cor respondence with Hewlett Packard should include the com plete serial number Model 3330A B Section II SECTION Il INSTALLATION AND INTERFACING 2 1 INTRODUCTION 2 2 This section contains information and instructions for the installation and shipping of the 3330A B Included are initial inspection procedures power and grounding require ments environmental information repackaging for ship ment and interfacing 2 3 INITIAL INSPECTION 2 4 This instrument was carefully inspected both mechani cally and electrically before shipment It should be free of mars or scratches and in perfect electrical order upon receipt To confirm this the instrument shouid be in spected for physical damage in transit and the electrical performance should be tested using the performance tests outlined in Paragraph 5 7 If there is damage or deficiency see the warranty inside the front of this manual 2 5 POWER REQUIREMENTS 2 6 The 3330A B operates from an ac power source of 48 to 66 Hz at the following voltages 115 V 5 10 230 V 5 10 The 3330A B is normally set for 115 V operat
38. z reference frequency to the rear panel This signal has the same accuracy and stability as the 5 MHz reference oscillator but a significant level of spurious and harmonic content is present 3 27 The special N4 loop VTO output will supply the N4 loop VTO signal divided by 10 to the rear panel This output is designed to be used in conjunction with the special SL3 loop Phase Detector input The SL3 loop input allows the operator to apply an external TTL logic signal of 2 3 MHz to increase the resolution of the 3330A B output The resolution of the 3330A B output will be determined by the resolution of the external 2 3 MHz The output from the N4 loop VTO can be externally mixed with the external 2 3 MHz signal to provide marker pulses see Figure 3 5 3 28 The special Mixer input is designed to be used in conjunction with the 20 33 MHz OUT on the 3330A B rear panel The 20 33 MHz OUT is applied to a special 3320A B where it is divided by factors of 10 in the 3320A B range dividers see Figure 3 6 The 20 33 MHz OUTPUT on the rear panel of the 3320A B is applied to the 3330A B spe cial Mixer input The resulting output of the 3330A B is a stable frequency which can be ranged by factors of 10 The full capability of the 3330B amplitude range and sweep can be used 3 29 For more information concerning these special con nections contact your local hp Sales and Service Office 3 30 SWITCHING TRANSIENTS 3 31 Frequency Switching
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