Datasheet - Liberty Test Equipment
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1. Agilent 8645A Agile Signal Generator 252 kHz to 2060 MHz Data Sheet Combining frequency agility with high performance Performance signal generator series a commitment to cost effective solutions Agg Agilent Technologies The 8645A agile signal generator brings all the pieces together The 8645A agile signal generator is a 252 kHz to 2060 MHz synthesized generator that combines high performance with frequency agility With this combination test both stringent RF performance and fast hopping capability of frequency agile radios and surveillance receivers In addition the 8645A can simulate a complex environment to test for susceptibility to interference or provide a fast switching stimulus for decreasing production test time In the past testing secure communications receivers required two separate pieces of equipment Measurements such as sensitivity and distortion were done one frequency at a time with a generator of high spectral purity and modulation capability Another generator that switched frequency quickly or another radio was used to functionally test the dynamic or agile portion of the radio Now the 8645A offers both high performance and fast hopping so you can test both static and agile operations of the receiver with just one calibrated signal generator Quality measurements begin with a quality source Signal generator performance must be better than receiver design or you end up meas2. Internal modulation source Waveforms Sine square sawtooth and white Gaussian noise Frequency range Sine white Gaussian noise 0 1 Hz to 400 kHz Square sawtooth 0 1 Hz to 50 kHz Frequency switching time Typically lt 30 msec Frequency resolution 0 1 Hz Frequency accuracy Same as internal reference oscillator Maximum output level Nominal 1V peak into 600Q Typical accuracy 20 mV output lt 100 kHz Output level resolution 2 mV Typical output impedance 600Q Distortion lt 0 1 output at 1 V peak and lt 15 kHz Frequency sweep Phase continuous sweep Sweep type Linear phase continuous Sweep time 10 msec to 10 sec not dependent on sweep span selected Maximum sweep span Frequencyrange MHz Maximum span MHz 1030 to 2060 40 515 to 1030 20 257 to 515 10 128 to 25 7 D 64 to 128 2 5 32 to 64 1 25 16 to 32 0 625 8 to 16 0 312 4 to 8 0 156 2 to 4 0 078 1 to 2 0 039 05 to 1 0 019 025to 0 5 0 009 Fast hop sweep Sweep type Linear or log frequency stepped Sweep time range 10 msec to 1000 sec number of frequency steps varies with sweep time selected Typical time per step is 30 usec for outputs within 128 to 2060 MHz 170 usec for 8 to 2060 MHz and 650 usec for 0 25 to 2060 MHz Digitally stepped sweep Sweep type Linear or log frequency stepped Sweep time range 500 msec to 1000 sec number of frequency steps varies with sweep time selected Typical time per step is 90
3. and your measurements The performance signal generator series offers cost effective choices when you buy it and when you use it Purchase as many options as you need to meet your most stringent requirements An internally modular design means Courtesy of AEL Industries Inc the particular configuration you need doesn t come with extra hardware that adds to the price On your bench you can optimize the particular capability that is most important to the test You select the performance you heed at the front panel by pressing a mode key For example phase noise and spurious products can be decreased by allowing a slower switching speed Also very wide FM deviations can be selected by giving up some spectral purity With the performance signal generator series you buy only what you need and optimize for each application Analyzing receiver vulnerability Using the 8645A you can exercise your receiver s susceptibility to various RF signal environments Complete control of frequency amplitude modulation and hop parameters lets you fully characterize performance Adjust the amplitude at the input to the receiver to determine its performance in the presence of jamming Combine frequency and amplitude modulation to evaluate propagation losses or transmitter velocity shifts Use the white Gaussian noise output of the internal modulation oscillator to create a static or agile Jamming signal to eval
4. 1 GHz SSB Phase Noise dBc Hz Offset Frequency Hz SSB phase noise CW AM or FM operation Standard operation Fast hop offset frequency operation Carrier 20 kHz 100 kHz 20 kHz offset frequency MHz dBc Hz dBc Hz dBc Hz 1030 to 2060 120 27 17 515 to 1030 27 134 124 257 to 515 132 137 130 128 to 257 136 140 133 64 to 128 139 141 137 32 to 64 141 141 139 16 to 32 142 142 141 8 to 16 143 143 142 4 to 8 144 144 143 2 to 4 144 144 144 1 to 2 144 144 144 0 5 to 1 144 144 144 0 25to 0 5 144 144 144 Residual FM CW AM FMP operation Post detection bandwidth Carrier 0 3 to 3 kHz 0 05 to 15 kHz frequency MHz Hz rms Hz rms 0 25to 25 7 lt 1 lt 1 2 257 to 515 lt 1 2 lt 2 515 to 1030 lt 2 lt 4 1030 to 2060 lt 4 lt 8 Residual AM lt 0 01 AM rms 0 3 to 3 kHz post detection bandwidth SSB AM noise floor offsets gt 100 kHz lt 157 dBc Hz at 10 dBm output 0 25 to 1030 MHz lt 150 dBc Hz at 13 dBm output 1030 to 2060 MHz Spurious signals Harmonics lt 30 dBc output lt 10 dBm Harmonics Option 002 lt 30 dBc 0 25 to 1030 MHz output lt 8 dBm lt 25 dBc 1030 to 2060 MHz output lt 8 dBm Subharmonics None 0 25 to 515 MHz lt 70 dBc 515 to 1030 MHz lt 40 dBc 1030 to 2060 MHz Nonharmonics lt 100 dBc gt 20 kHz offset 0
5. 2060 MHz With FM on limited to any three consecutive carrier frequency bands Frequency accuracy2 2 ppm of carrier frequency Typically 1 ppm Amplitude accuracy 1 dB gt 127 dBm output Channel and sequence tables In fast hop each specific frequency and amplitude to be output is entered into a channel table The order for the channels to be output is entered in a sequence table Maximum number of channels 2400 Maximum number of channels in sequence table 4000 Hop rate range Fixed rates from 8 Hz to 50 kHz using the internal timer An external trigger input allows extended range and variable rates Dwell time range Fixed times of 6 4 usec to 99 msec using the internal timer An external trigger input allows longer and variable dwell times Learn cycle time Typically 10 sec to 2 minutes depending on sequence table length Fast hop bus Allows real time selection of any channel for output while fast hopping Typically frequency switching time increases by 5 usec Modulation allowed Internal or external AM FM or simultaneous AM and FM Output level Maximum allowed variation of all amplitudes entered in channel table is 20 dB Frequency switching time and absolute accuracy degrade with increasing amplitude variation Output level is reduced by gt 60 dB while switching between channels External dc AM can be used to shape the output level while fast hopping Spectral purity Typical SSB phase noise and spurs at
6. 25 to 1030 MHz lt 94 dBc gt 20 kHz offset 1030 to 2060 MHz 3 FM at minimum deviation 4 Specified for 48 to 63 Hz power line Typical for 400 Hz power line and for fast hop operation 5 Deviation lt 0 1 of maximum available 6 Typically nonharmonic spurs at all offsets are lt 30 dB above the instrument s phase noise level as measured in a 1 Hz bandwidth 7 Lower 3 dB bandwidth limit is typically 20 Hz for ac coupling Output Maximum level 16 dBm 0 25 to 1030 MHz Option 002 14 dBm 0 25 to 1030 MHz 13 dBm 1030 to 2060 MHz Minimum level 137 dBm Display resolution 0 1 dB Absolute accuracy 1 dB output gt 127 dBm Typically 3 dB output lt 127 dBm Reverse power protection 50 watts from a 50 source 25 Vdc Third order intermodulation lt 50 dBc with two signals at 8 dBm and 25 kHz apart passing through a resistive combiner exception fast hop operation Decreases 10 dB for every 5 dB of combined level decrease Output level overrange Typically 2 dB more than maximum level Output level switching time lt 50 msec See exception in fast hop SWR and output impedance lt 1 7 1 output lt 2 dBm lt 2 1 output 2 2 dBm 50Q output impedance Modulation External modulation input Cowpling is ac or dc for AM FM and phase modulation Pulse modulation input is dc coupled Displayed deviation or depth corresponds to 1 V external input Simultaneous modulation AM FM AM Phase
7. 75 MHz 0 to 100 3 75 MHz FM distortion rates 20 Hz to 100 kHz Deviation of maximum Standard operation Fast hop operation Oto 2 lt 1 lt 1 2to 10 lt 3 lt 1 10 to 50 lt 3 lt 3 50 to 100 lt 6 lt 6 Carrier frequency accuracy in FM 0 4 of deviation setting ac or dc coupled Typically add 1 of deviation to frequency accuracy in fast hop operation Incidental AM lt 0 5 deviation lt 6 of maximum or 20 kHz whichever is less External FM group delay 30 usec for rates 20 Hz to 20 kHz decreases to lt 1 usec at rates above 200 kHz Fast Hop lt usec External FM input impedance 50Q or 600Q 8 Deviation is limited to the maximum available at the lowest carrier frequency output in the fast hop sequence 10 Phase modulation Maximum phase deviation 400 radians 1030 to 2060 MHz decreases by half for each frequency band below this band Phase modulation indicator accuracy 10 Phase modulation distortion lt 1 Phase modulation 3 dB bandwidth gt 150 Hz External input impedance 600Q Pulse modulation On off ratio gt 35 dB Rise fall time lt 100 nsec 10 to 90 response points Maximum pulse repetition frequency 1 MHz Minimum pulse width 0 5 usec Video feedthrough and overshoot lt 10 10 to 2060 MHz Output level accuracy 2 dB External input levels On gt 3 0 V peak Off lt 0 8 V peak Damage Level gt 10 V peak External input impedance 600Q
8. AM Pulse F M Pulse Phase Pulse AM FM Pulse AM Phase Pulse Simultaneous internal external modulation FM and Phase Amplitude modulation AM depth 0 to 99 9 for output lt 7 dBm AM resolution 0 1 AM indicator accuracy 6 of setting 1 AM up to 90 depth and 1 kHz rate AM distortion at 400 Hz and 1 kHz rates Carrier frequency Depth 0 25 to 1030 MHz 1030 to 2060 MHz 257 to 30 lt 2 lt 2 515 to 70 lt 3 lt 4 1030 to 90 lt 4 lt 6 AM 3 dB bandwidth gt 5 kHz 0 25 to 8 MHz gt 50 kHz 8 to 128 MHz gt 100 kHz 128 to 2060 MHz Incidental phase modulation lt 0 2 radians peak at 30 depth and 1 kHz rate External AM input impedance 600Q Frequency modulation FM deviation and rate Maximum peak Maximum deviation rate Carrier Standard Fast hop 3 dB BW frequency MHz kHz kHz kHz 1030 to 2060 20000 3520 10000 515 to 1030 10000 1760 10000 257 to 515 5000 880 5000 128 to 257 2500 440 2500 64 to 128 1250 220 1250 32 to 64 625 110 625 16 to 32 313 55 313 8 to 16 156 27 5 156 4 to 8 78 13 7 78 2 to 4 39 6 8 39 1 to 2 19 5 3 4 19 5 0 5 to 1 9 7 1 7 9 7 0 25to 0 5 4 8 0 8 4 8 FM resolution 2 5 of setting FM indicator accuracy Standard operation Fast hop operation Deviation Maximum Deviation Maximum of maximum rate of maximum rate Specified accuracy 10 0 to 10 50 kHz 0 to 50 50 kHz Specified accuracy 18 0 to 17 3
9. 71874 0 5 to 1 0 50292969 to 1 00585937 0 25to 0 5 0 25146485 to 0 50292968 Resolution 0 01 Hz Stability Same as reference oscillator See fast hop for exception Frequency switching time lt S5 msec to within 100 Hz of final frequency See fast hop for exception Phase offset Adjustable in 1 increments Internal reference oscillator Stability Option 001 lt 5x10 day aging after 10 day warm up Standard Option 001 Aging 2 ppm year 3x10 9 day after 1 year after 10 days Temperature 4 ppm 0 to 55 C 6x10 9 0 to 55 C Line voltage 0 1 ppm 10 1x10 410 Electronic frequency control Option 001 0 01 ppm for 1 V at rear panel connector Voltage range is 10 V Input impedance is 10 kQ Output 10 MHz gt 1 V level into 50 output impedance of 50Q External reference oscillator input Accepts 10 MHz 1 kHz and a level range of 0 5 to 2 V ms Input impedance is 500 1 Agilent does not support the fast hop buffer off mode of operation 2 Typically 2 ppm of carrier frequency multiplied by the temperature change in C must be added if ambient temperature changes occur between the learn operation and the conclusion of frequency hopping FM off or at minimum deviation 8 Fast hop operation Frequency switching time 128 75 to 2060 MHz lt 15 usec 8 to 2060 MHz lt 85 usec 0 25 to 2060 MHz lt 500 usec Add 5 usec for closed loop ALC operation Frequency hop range 0 25 to
10. al input Selectable coupling of the external inputs allows dc or only ac components to appear on the carrier A ni 8645A AGILE PNA PENERATOR 26 1030 MHz gilent HEWLET PACKA FREQUENCY STATUS F STRT F STOP F CR START STOP CTR FREQ FREO FREQ O06 SWEEP FREO E es F AKR1 F MER2 FP AKR G HP 18 e oe pie DNM On sery IORS LY O REM LSN s O O RO Ch Centrally located carrier controls select frequency and amplitude level and offer a simple way to turn the output on or off Offset capability includes add subtract multiply divide functions to provide a display of the signal frequency or level at the output of a device under test Even emf can be selected to display the open circuit output voltage The data block not only allows numeric or on off entries for many instrument functions it also contains the shifted control keys for the fast hop functions Signal parameters are entered into the channel and sequence tables here along with the hop ping rate and length of the RF dwell at each frequency Control of the hop trigger and dwell time are selectable with the mode key Pressing learn prepares for frequency hopping hop begins the hopped output and idle stops the hopped signal ee A ATION INCR DECR KNOB HOLD SET SEO RO SEO QR SEO FAST HOP PS HODE SELECT pm OUTPUTS o o o o o o a n z foes frome rome 5 fa HOP a Se lt lt The incremen
11. alibrates itself and is ready to go all in less than 20 minutes This internal fault location and self calibration capability means fewer visits to the calibration lab giving you more up time Easier programming Building and maintaining a program to control the 8645A is easier with HPSL Full word mnemonics are used to decrease the documentation investment required A command package message structure allows many commands to be grouped together for simultaneous execution These packages avoid operating limitations and errors due to the order of commands given These fundamental changes result in easier programming and reduced software development time Courtesy of Mini Circuit Fast stimulus testing Operating in either static or agile mode the 8645A can stimulate a device with a calibrated input to find its exact operating response Either output a single frequency while varying amplitude or modulation or do the same while hopping frequencies Or select frequency sweep for a repetitive picture of a frequency response In all cases phase noise and spurs are low and do not interfere with test results Having one signal generator as a Static agile and swept frequency stimulus reduces maintenance and training costs and improves ATE programming productivity Front panel features Bright vacuum florescent displays clearly show the status of the signal being generated under any ambient light conditions T
12. cific Countries tel 65 375 8100 fax 65 836 0252 Email tm_asia agilent com Product specifications and descriptions in this document subject to change without notice Copyright 2002 Agilent Technologies Inc Printed in USA July 24 2002 5953 8498E whee Agilent Technologies
13. control or lock the generator to an independent 10 MHz reference signal input at the reference in port 8645A specifications Specifications describe the instrument s warranted performance and apply 24 hours after the unit has been connected to the ac power line and 10 minutes after tum on except fast hop 2 hours warm up The specifications assume the instrument is operating in the auto mode except fast hop operation which automatically optimizes the internal hardware configuration for maximum performance Supplemental characteristics are intended to provide information useful in applying the instrument by giving typical but not warranted performance These characteristics are shown in talics or labeled as typical approximate or nominal Frequency Range 251 46485 kHz to 1030 MHz 251 46485 kHz to 2060 MHz with Option 002 or with an 11845A 2 GHz retrofit kit installed Frequency bands Exact endpoints and their approximations for each frequency band of the instrument are shown below Approximate frequency Specified frequency band endpoints MHz band endpoints MHz 1030 to 2060 1030 to 2060 515 to 1030 515 to 1029 99999999 257 to 515 257 5 to 514 99999999 128 to 257 128 75 to 257 49999999 64 to 128 64 375 to 128 74999999 32 to 64 32 1875 to 64 37499999 16 to 32 16 09375 to 32 18749999 8 to 16 8 046875 to 16 09374999 4 to 8 4 0234375 to 8 04687499 2 to 4 2 01171875 to 4 02343749 1 to 2 1 00585938 to 2 011
14. he output signal s frequency amplitude modulation and hopping status as well as any special functions or diagnostic messages appear in this area The utility area contains a number of functions that can reset or report the instrument state While instrument preset and the 50 save recall registers set controls to a known status the sequence key can trigger the sequential recall of up to 10 stored instrument states for faster production line operation Pressing special allows a review of all special functions with a spin of the knob and selection with the on key Operating conditions can be checked using message The display key offers helpful information on such things as which special functions are currently active GPIB status and control is provided with several indicator lights and a key to return the instrument to local control Displaying or setting the GPIB address is a shifted function of the local key Extensive sweep capabilities include phase continuous outputs for smooth frequency stimulus synthesized frequency stepped signals for highly accurate outputs and a fast hop function for very wide sweeping with fast updates Besides linear or log frequency spacing of the steps up to three markers can be set anywhere in the sweep range Control of modulation includes type deviation and depth as well as whether the modulating signal is the internal 400 kHz oscillator or an extern
15. hing frequencies as fast as 15 usec from 128 to 2060 MHz Typical frequency accuracy is 1 Hz per MHz and amplitude accuracy is better than 1 dB Extending the range down to 8 MHz increases switching speed to 85 usec Below 8 MHz it is 500 usec For a full test of the receiver you can enter 2400 unique frequencies and specify unique sequences of up to 4000 frequency settings Key performance parameters such as phase noise spurious amplitude accuracy and modulation remain high quality and are completely specified Complete control of frequency hopping The 8645A offers flexible control of frequency switching You can input parameters from the front panel with GPIB or using TTL connectors from the rear panel Extensive hopped frequency simulations can be entered into the nonvolatile memory from the front panel Your system is up and running quickly without needing a special interface To activate a hopped sequence you just push a button Or you can enter in the data with a computer using HPSL Hewlett Packard Systems Language and start the sequence with a single command Either way you can precisely control hop rate dwell time frequency amplitude and modulation For real time control the rear panel accepts TTL inputs for triggering dwell time and frequency selection With this choice of control you can customize use of the 8645A for any test application Frequency sweeping To find the amplitude response of f
16. kit 11845A Installation of a single module and several cables extends the frequency range of the standard instrument to 2060 MHz Storage registers 10 full function and 40 frequency amplitude registers 9 Options not available in all countries Memory erasure All memory contents except generic calibration data can be erased according to Mil Std 380 380 Weight Approximately 29 to 31 kg 63 to 69 lbs net and 40 to 42 kg 88 to 94 lbs shipping depending on the options ordered Dimensions Approximately 177H x 426W x 624D mm 7 x 16 8 x 24 6 in ee z ss a 07 z Ey 0 9 Ordering information To add options to a Model use the following ordering scheme Example Model 8645A Model option 8645A 001 8645A agile signal generator options 8645A 001 High stability time base 8645A 002 2 GHz output 8645A 003 Rear panel inputs outputs deletes front panel inputs outputs 8645A 907 Front handle kit 5061 9690 8645A 908 Rack flange kit 5061 9678 8645A 909 Combined front handle rack flange kit 5061 9684 8645A 910 Extra manual set includes service manual 8645A 915 Add service manual Transit case 9211 2662 Transit case wheels 1490 0913 Non tilting rack slide kit 1494 0059 Tilting rack slide kit 1494 0063 Warranty plans Standard warranty is 36 months For warranty and service of 5 years please order 60 months of R 51B quantity 60 R 51B Return to Agilent war
17. msec X axis output Nominal 0 to 10 V Z axis output Nominal 5 V during retrace Markers available 3 Remote programming Interface GPIB GPIB select code range 00 to 30 Interface function is listener and talker Control language HPSL Hewlett Packard Systems Language Functions controlled All front panel functions except power switch and knob IEEE 488 functions SH1 AH1 T6 TEO L4 LEO SR1 RL1 PPO DC1 DTO CO E2 Fast hop bus interface DB 25 connector accepting TTL levels General Power requirements 10 of 100 V 120 V 220 V or 240 V 48 to 440 Hz 500 VA maximum Operating temperature range 0 to 55 C Storage temperature range 55 to 75 C Leakage Conducted and radiated interference meets MIL STD 461B REO2 and FTZ 1046 RF leakage is typically lt 0 5 uV induced in a two turn loop antenna 2 5 cm in diameter held 2 5 cm away from the front panel for output levels lt 0 dBm Acoustic noise Typically lt 5 5 bels Internal calibration The operator can initiate an internal calibration and diagnostic function that will ensure all specifications are being met with a confidence level exceeding the accepted standard of 95 Internal diagnostics The instrument monitors its operation and will alert the user to most internal malfunctions Built in test capability locates circuit malfunctions to allow repair through module or cable replacement Calibration interval 3 years MTBO Retrofit
18. ranty and service plan Calibration plan For 3 years order 36 months of the appropriate calbra tion plan shown below For 5 years specify 60 months R 50C 001 Standard calibration Bey Agilent Email Updates www agilent com find emailupdates Get the latest information on the products and applications you select Agilent Technologies Test and Measurement Support Services and Assistance Agilent Technologies aims to maximize the value you receive while minimizing your risk and problems We strive to ensure that you get the test and measurement capabilities you paid for and obtain the support you need Our extensive support resources and ser vices can help you choose the right Agilent products for your applications and apply them successfully Every instrument and sys tem we sell has a global warranty Support is available for at least five years beyond the production life of the product Two concepts underlie Agilent s overall support policy Our Promise and Your Advantage Our Promise Our Promise means your Agilent test and measurement equipment will meet its adver tised performance and functionality When you are choosing new equipment we will help you with product information including realistic performance specifications and practical recommendations from experienced test engineers When you use Agilent equip ment we can verify that it works properly help with product operation and provide basic mea
19. requency sensitive devices the 8645A can sweep even wide frequency ranges without surrendering to long sweep times and slow display updates To stimulate IF passband circuits or filters spans up to 40 MHz can be swept with a phase continuous output in only 10 msec Much wider spans of more than 1 GHz can be covered in less than 100 msec with a stepped output of up to 1000 points In either sweep mode up to three markers can be set to highlight points on the response Courtesy of Rockwell International Testing surveillance receivers Surveillance receivers are designed to detect and identify a wide variety of transmissions The 8645A can benefit designers of surveillance hardware with a calibrated nonclassified source that can simulate many fixed and agile transmitters The 8645A signal generator can operate from 252 kHz to 2060 MHz with FM AM and pulse modulation Hop rates as fast as 50 000 changes per second and dwell times as short as 6 4 sec per frequency allow receiver testing for transmitters now and into the future Performance signal generator series a commitment to cost effective solutions The 8645A agile signal generator is the first member of the performance signal generator series Using innovative design and manufacturing this series offers benefits such as selectable performance greater reliability modular support strategy and an easier programming language Optimize your purchase
20. s available with up to 100 kHz rates and 99 depth Pulse modulation allows a 35 dB on off ratio with 100 nsec rise fall times Tr s aaa ja at a TE UAL 7 gt gt gt gt s m gt P a me ba a gt a gt P Courtesy of ITT Aerospace Optical Division Testing frequency agile radios Testing frequency agile radios in design and manufacturing requires two sets of capabilities High performance is needed for traditional measurements such as sensitivity and distortion Frequency agility is needed for testing hopping characteristics The 8645A provides both of these in one generator Because spectral purity and accurate modulation is available under both static and dynamic operation you can make fundamental tests such as sensitivity while hopping the radio Selectable FM deviations from 1 Hz to 20 MHz with rates up to 10 MHz lets you test either voice quality or high speed data reception Built in control capabilities allow the 8645A to synchronize with a transmitter or directly to the receiver Key parameters such as hop rate dwell time amplitude and frequency can be modified precisely either in real time from the front panel or over GPIB Specified agile performance In the past to get agility ina generator you had to give up performance such as phase noise spurious levels and amplitude range With the 8645A you can maintain signal performance while switc
21. surement assistance for the use of specified capabilities at no extra cost upon request Many self help tools are available Your Advantage Your Advantage means that Agilent offers a wide range of additional expert test and measurement services which you can pur chase according to your unique technical and business needs Solve problems effi ciently and gain a competitive edge by con tracting with us for calibration extra cost upgrades out of warranty repairs and on site education and training as well as design system integration project manage ment and other professional engineering services Experienced Agilent engineers and technicians worldwide can help you maxi mize your productivity optimize the return on investment of your Agilent instruments and systems and obtain dependable measure ment accuracy for the life of those products By internet phone or fax get assistance with all your test and measurement needs Online assistance www agilent com find assist Phone or Fax United States tel 1 800 452 4844 Canada tel 1 877 894 4414 fax 905 282 6495 China tel 800 810 0189 fax 1 0800 650 0121 Europe tel 31 20 547 2323 fax 31 20 547 2390 Japan tel 81 426 56 7832 fax 81 426 56 7840 Korea tel 82 2 2004 5004 fax 82 2 2004 5115 Latin America tel 305 269 7500 fax 305 269 7599 Taiwan tel 080 004 7866 fax 886 2 2545 6723 Other Asia Pa
22. t decrement area contains the knob and step keys which allow numeric changes of any signal parameter with the resolution set using the left right arrow keys or the increment set of the carrier controls Phase increment decrement of the carrier output relative to the timebase signal is also provided here with 1 resolution The mode select keys 1 through 4 represent internal signal paths that minimize phase noise and spurs on the RF output as a function of how much FM deviation is selected The automatic capability chooses the signal path with the best possible spectral purity for any control setting Pressing the mode 5 fast hop key prepares the internal hardware for a frequency agile output Individual output ports for both the RF carrier and the internal modulation oscillator provide two synthesized signals from one instrument The RF port yields a 500 output of signals from 252 kHz to 2060 MHz with selectable frequency amplitude and modulation characteristics The audio output Is the internal modulating signal or when internal modulation is not active can provide a calibrated signal in the range of 0 1 Hz to 400 kHz with a maximum 1 volt level into 600Q Rear panel features Rear panel ports allow a variety of signals to be available for use as needed Reference signals from the internal frequency standard or the Option 001 high stability timebase are provided The user can tune the Option 001 timebase through an electronic frequency
23. uate minimum signal detection Or vary the hop frequency hop rate dwell time power or FM deviation to test the receiver s susceptibility to loss of synchronization With the 8645A you can start with a nominal signal and stretch every parameter to test the receiver s limits Building in greater reliability The performance signal generator series offers you a more reliable signal generator Each instrument consists of modules with specified performance Every module is tested as if it were a complete instrument on the production lines When the modules are brought together in an instrument the overall performance of the module combination is tested again Using this proven concept of building high performance instruments from modules results in greater reliability Designed to be self supporting The design of the 8645A offers innovative advances in support strategies Each module contains built in sensors By activating the built in calibration routine the instrument will measure internal signal levels and adjust control voltages to ensure the output meets specifications This self calibration eliminates the need for external test equipment Digital control makes all adjustments automatic without removing the instrument cover If a circuit fails the 8645A will use the same built in sensors to locate the failure and instruct the user on which module to replace With a new or repaired module in place the 8645A c
24. uring the source rather than the receiver The 8645A offers high performance for in channel and adjacent channel measurements both in static and agile operation For example an adjacent channel signal must have low phase noise and spurs at the channel offset or the receiver s signal will be masked The 8645A specifies lt 127 dBc phase noise and lt 100 dBc spurious amplitudes at a 20 kHz offset from the carrier Typical performance is even better As an in channel signal generator low FM distortion and residual FM become essential The 8645A specifies less than 1 to 6 of FM distortion for deviations up to 20 MHz and less than 1 to 4 Hz residual FM for carrier frequencies from 0 25 to 2060 MHz For traditional receiver measurements the 8645A offers the performance you need for even the most stringent receiver specifications Add frequency agility without sacrificing high performance specifications and you have one generator for testing both static and agile operation Modulation while hopping For receiver measurements the 8645A offers simultaneous FM AM and pulse modulation Whether in fast hop mode or doing static receiver measurements the carrier can be either internally or externally modulated The 8645A has a digitally generated 0 1 Hz to 400 kHz audio source Or you can use external FM with up to 20 MHz deviation and 10 MHz rates In fast hop mode maximum deviation is 3 5 MHz with rates up to 10 MHz AM i
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