User`s Manual
Contents
1. 0 Hz 0 P W AT5000 K 1 38 x 104Bm 20dBm 0 T K B Hz 1dB2. 0 40dB 4 x 10dB 1dB 2dB 40dB 500 50Q EAE EAR fei m RE o 95dB 95dBm 20kHz 0 1MHz DIV 400kHz 13d4B Spectrum Analyzer AT5005 5006 AT5005
3. 2 Hz gt pay AS x EXN YJ TM y H 2 TM M H Eyes Taury Mead 250MHz 250MHz Jie 274Bm ME X P08 16 E O 4 TH tf BUR DOE AT baie MR PERENE m D 100MHz si 100 21 I H Ti its CIA yp il 1 de
4. CATV AT5000 e e RE i Hg 0 15 500MHz 100kHz 0 19699 E 100kHz 100kHz 4 5 LED 10 150kHz 400kHz 20kHz 4kHz
5. 10 10dB 1dB 104B 14B 3qB enes as SOBRE Hz 3dB Hz o0 IEEE MUMMIES tony a EAEE E BEA ANTES AE AE SORES TES 15 1 60dB
6. 500 2 2 fij 1200MHz 150kHz He OHz AT5005 5006 0Hz 1 1 1 2 3 ON OFF
7. 100kHz 1000MHz 1 1 1 50Q 1 5 BNC BE E E 3
8. e EMC PHOTE AM FM JRE EX THU BE 3dB F aE 100kHz 100MHz 4 LED AT5011 AZ530
9. 0 SWR E AT5005 5006
10. A Gu 4 s e 29 0 1 1000MHz 500 BNC 2pF 10dBm 20Vmax 6VDC 4 AA E 8mA SmA 24mA 195 x 40 x 19 LxWxH mm SUBE CHER Hm Uim I AZ530 M 1 1 8 1l d3 d pee AMIC
11. AT5006 0 15 500MHz 1 AT5000 AT5000 ATS000 1 10dBm 0 7Vrms AC 2SVDC 40dB AC 20dBm 2 2Vrms 1 LISN
12. AF 10 C 50 40 C 104 10 C 50 10 14 40 lt 40 70 158 2200m 15000m 80 Hae X Eat TH i ATTENXJ T till F 1 0 ATTEN Hr JR ATTEN ERFT EEH 4
13. 5 x 20mm 250V DIN41662 41571 dut np Seb EA 220V 10 F b PRUE BIBER E 0 15 500MHz Yt Yf 1
14. FR SRSA ABI H 2 AT5006 0
15. Hz nnm MT 3dB DRM aS BE dB 3dB _ 7 em Hz i P K T B 0dB 27dBm e
16. 15 C 59 F 30 486 E 60 RET FUE E 10 ATEEN
17. 18 3 5 169 2 GAY AY HEAT B 19 20 6V DC AZ530 AZ530 ji 50 CON 21 BE AT5006 11dB Fal 0 10 1dBm 22 AT5006 0 i BNC Sy 23 AT5006 0 1 50 dBm 24
18. 1 27dBm 70dB ER 70dB lp ASTOR 2 IOkHz PRUE THER Sauer 22 BUR AREL PAEA Dr appe mU nos 180 ORDUASOKGHPRERUM EKNE ZETE CARI MLE EEE REELE opum gee
19. ar 2 jJ o RU rp WA ES ANE HM ERR Jr 9 R
20. Y Y POS 2 100KHz 0 1SMHz 500MHz 0 15MHz 500MHz 250MHz 2dB 230MHz 27d4BM 250MHz 2MHz DIV 400kHz 250MHz OMHz DIV 30dB 2dB
21. af 27dBm Y 12 FRIIS ono XY Y AMPL
22. 7 10dBmAC 20dBm 14 25VDC 40dB 4 10dB 1 EE MA 0dB 27dBm 10 107dBm 10dB 174 31 6mV 97dBm 204 0 1V 87dBm 30dB 3dBm 316mV 77dBm 40dB 13dBm 1V 67dBm JL 1 10dB i
23. ERTAS Sen EBERT E m B Wn IAS TIE OK Hz A FESR tH 4 ll A S B n b A 10kHz 1 27dBm e ME Nosti hd 704B TR Tp uta D RP SERO SUR E AER pm 27 70 deos numen aman 97dBm JAIME AER
24. a IEC 10101 K EN61010 E gt amp SG 381 gt A 2200VDC 50 60Hz AA ZI KBR 36pA Kg 0 5mR h HRA X
25. NS 3 0 15 500MHz fy 1350 2350MHz ZH 1 1 1350MHz 2 2 29 875MHz 3 2 75MHz 3 1 400kHz 20kHz 1 Y CRT Y X 1 0 1
26. B 274Bm 77dBm Y RSE Te ee eee i tat Fetal rA MEER Dmm Y A A B 14 22 ete eee 60 27dBm AE TESST DEI Be SS Hi SCIAS 2 h KE 10dB 4 2 D
27. i 4 x 10dB 50MHz 250MHz RES dot 15 1200MHz lt gt gt 1 2 5 100kHz 500MHz MHz X 10 lt 300MHz 100MHz 250MHz 2
28. AZ530 E Sry LA Beil PP F E H Hi Z i RFI 2pF 1GHz 80Q AZ530 H IC 50Q
29. 1dB
30. 10 4 BRA 5 ON OFF OFF 8 ON MARKER 6 CF CON 7 7 100kHz 8 LED
31. 14 E pe ate SIM ria VIA 2008 AT5005 06 60 11 OFF Wi 10 400kHz 15 100MHz H 250MHz mom gens 40 50dB
32. 21 Control Elements 22 Vertical lt lt lt 55 lt lt 24 Horizontal Calibration 5 MH 24 Introduction to Spectrum Analysis 25 Types of Spectrum Analyzers 26 Spectrum Analyzer Requirements 27 Frequency Measurements MM 27 Resolution eee 27 Sensitivity M Mn 28 Video Filtering pang NORMA EG FS PLE 28 Spectrum Analyzer Sensitivity 28 Frequency Response a dave e dA va a 29 Tracking Generators MM 29 Mainly Performance and Calibration 30 Block Diagram 5005 06 33 Front View 5005 34 Front View AT5006 35 AT5005 5006 AT5005 e 0 15 500MHz 4 0 1MHz e 100 13dBm 20kHz 400kHz AT5006 0 15 500MHz 1 50dBm 500 AT5000 1GHz 0 15 1050MHz
33. Ert 60 17 C 11 10 400kHz 15 oes ree 2MHz tr uu 10 27dBm 0 2dB 10mV PEEHUR TUE RS 13 2MHz E 250MHz
34. AT5000 A N A 0 de T 10 27 7 20 D E A Z C 10 ff DD E D B CENELEC
35. n 20kHz 4kHz 9 10 400kHz 20kHz 20kHz LED 11 4kHz 12 Y 3 BNC 50Q
36. AT5006 Meu MEA TE EET
37. 7 5 E Hn TM RIL i AT5000 RIMES BUPE AIDAKU PASE STAR MM 27dBm 70dB 2222 2 1 2
38. 2pF high imped Probe Max Input Level 10dBm without destruction 1dB compression point 2dBm frequency range dependent e DC input voltage 20V max e Supply Voltage 6V DC size batteries Supply power of Analyzer e Supply Current 8mA H Field Probe 5mA E Fieldprobe 24mA High imp probe Probe Dimensions 195x40x19 L W H mm e Housing Plastic electrically shielded internally The H Field Near Field probe The H Field probe provides a voltage to the connected measurement system which is proportionalto the magnetic radio frequency RF field strength existing at the probe location With this AZ530 M probe circuit RF sources may be localized in close proximity of each other The H Field will decrease as the cube of the distance from the source A doubling of the distance will reduce the H field by a factor of eight H 1 d where d is the distance In the actual use of the H field sensor one observes therefore a rapid increase of the probe s output voltage as the interference source is approached While investigating a circuit board the sources immediately obvious It is easily noticed which compo nent i e IC causes interference and which does not In addition by use of a spectrum analyzer the maximum a mplitued as a function of frequency is easily identified Therefore one can eliminate early in the development components which are not suitable for EMC purposes The effectiveness of c
39. Frequency Range 0 15MHz to 500MHz e 4 Digit Display Center amp Marker Frequency 0 1MHz resolution 100 to 13dBm Amplitude Range 20KHz 400KHz and Video Filter Tracking Generator 475006 only Frequency range 0 15MHz to500MHz Output Voltage 1dBm to to 500Bm 50 Q Accessories Users Manual Power Cord 1 Evolution of the original AT5005 AT5006 has led to the new AT5005 5006 Spectrum Analyzer Tracking Generator which now extends operation over IGHz frequency range 0 15 to 1050MHz Both fine and coarse center frequency controls combined with a scan width selector provide simple frequency domain measurements from 100kHz Div To 100 MHz Div Both models include a 4 digit numeric LED readout that can selectively display either the center or marker frequency The AT5005 includes a tracking generator The AT5005 5006 offer the same operation modes as the AT5005 5006 The instruments are suitable for pre compliance testing during develop prior to third party testing A near field sniffer probe set AZ530 can be used to locate cable and PC board emission hot spots and evaluate EMC problems at the breadboard and prototype level The combination of AT5010 5011 with the AZ530 is an excellent solution for RF leakage radiation detection CATV MATV system troubleshooting cellular telephone pocket pager test and EMC diagnostics There is an optional measurement output for a PC which makes documentation of results easy and
40. Such parameters as conversion loss isolation and distortion are readily determined from the display The spectrum analyzer can be used to measure long and short term stability Parameters such as noise sidebands on an oscillator residual FM of a source and frequency drift during warm up can be measured using the spectrum analyzer s calibrated scans The swept frequency responses of a filter or amplifier are examples of swept frequency measurements possible with a spectrum analyzer These measurements are simplified by using a tracking generator Types of Spectrum Analyzers There are two basic types of spectrum analyzers swept tuned and real time analyzers The swept tuned analyzers are tuned by electrically sweeping them over their frequency range Therefore the frequency components of a spectrum are sampled sequentially in time This enables periodic and random signals to be displayed but makes it impossible to display transient responses Real time analyzers on the other hand simultaneously display the amplitude of all signals in the frequency range of the analyzer hence the name real time This preserves the time dependency between signals which permits phase information to be displayed Real time analyzers are capable of displaying transient responses as well as periodic and random signals The swept tuned analyzers of the trf tuned radio frequency or superheterodyne type A trf analyzer consists of a bandpass filter w
41. a measure of how much the frequency changes during a specified time i e Hz hr Before the frequency of a signal can be measured on a spectrum analyzer it must first be re solved Resolving a signal means distinguishing it from its nearest neighbors The resolution of a spectrum analyzer is determined by its IF bandwidth The IF bandwidth is usually the 3dB bandwidth of the IF filter The ratio of the 60dB bandwidth in Hz to the 3dB bandwidth in Hz is known as the shape factor of the filter The smaller the shape factor the greater is the analyzer s capability to resolve closely spaced signals of unequal amplitude If the shape factor of a filter is 15 1 then two signals whose amplitudes differ by 60dB must differ in frequency by 7 5 time the IF bandwidth before they can be distinguished separately Otherwise they will appear as one signal on the spectrum analyzer display The ability of a spectrum analyzer to resolve closely spaced signals of unequal amplitude is not a function of the IF filter shape factor only Noise sidebands can also reduce the resolution They appear above the skirt of the IF filter and reduce the offband rejection of the filter This limits the resolution when measuring signals of unequal amplitude The resolution of the spectrum analyzer is limited by its narrowest IF bandwidth For example if the narrowest bandwidth is 10kHz then the nearest any two signals can be and still be resolved is 10kHz This i
42. are only necessary when calibrating the instrument They do not re quire adjustment under normal operating conditions A very accurate RF Generator e g ATTEN 8133 is necessary if any adjustment of these controls is required 18 Phone 3 5mm earphone connector An earphone or loudspeaker with an impedance gt 16W can be connected to this output When tuning the Spectrum Analyzer to a spectral line possibly available audio signals can be detected The signal is provided by an AM Demodulator in the IF section It demodulates any available AM Signal an provides as well one side FM Demodulation The output is short circuit proof 19 Volume Volume setting for earphone output 20 Probe Power The output provides a 6Vdc voltage for the operation of an 7530 near field sniffer probe It is only provided for this purpose and requires a special cable which is shipped along with the AZ530 probe set 21 Level AT5006only The output level of the Tracking can be continuously adjusted with this knob by 11dBm 10dB to 1dBm 22 TRACK GEN 475006 only The Tracking Generator is activated if the push button is depressed ON In this case a sine signal can be obtained from the OUTPUT BNC socket with a frequency determined by the Spectrum Analyzer In ZERO SCAN mode the Center Frequency appears at the output 23 Output AT50060nly 50 BNC socket of the Tracking Generator The output level can be determined fro
43. circuit without significantly influencing the relationships in the circuit with the probe One can for example measure the quantitative effectiveness of filters or other or other blocking measures Individual pins of ICs can be identified With this Hi Z probe individual test points of a circuit can be connected to the 50W impedance of spectrum analyzer General Information The AT5005 5006 spectrum analyzers are easy to operate The logical arrangement of the controls allows anyone to quickly become familiar with the operation of the instrument however experienced users are also advised to read through these instructions so that all functions are understood Immediately after unpacking the instrument should be checked for mechanical damage and loose parts in the interior If there is transport damage the supplier must be informed immediately The instrument must then not be put into operation Symbols A ATTENTION refer to manual Danger High voltage 7 Protective ground earth terminal Tilt handle A 0 4 107 20 To view the screen from the best angle there are three different positions C D E for setting up the instrument If the instrument is set down on the floor after being carried the handle automatically remains in the upright carrying position A In order to place the instrument onto a horizontal surface the handle should be turned to the upper side of the Spectrum Analyzer C Fo
44. counter This configuration is use for making selective and sensitive precise measurement of frequency by tuning to the signal and switching to zero scan In the closed loop configuration the tracking generator signal is fed into the device under test and the output of the device under test is connected to the analyzer input In this configuration the spectrum analyzer tracking generator becomes a self contained complete source detector and display swept frequency measurement system An internal leveling loop in the tracking generator ensures a leveled output over the entire frequency range The specific swept measurements that can be made with this system are frequency response amplitude vs frequency magnitude only reflection coefficient and return loss From return loss or reflection coefficient the SWR can be calculated Swept phase and group delay measurements cannot be made with this system however it does make some unique contributions not made by other swept systems such as a sweeper network analyzer a sweeper spectrum analyzer or a sweeper detector oscilloscope Precision tracking means a every instant of time the generator fundamental frequency is in the center of the analyzer passband and all generator harmonics whether they are generated in the analyzer or are produced in the tracking generator itself are outside the analyzer passband Thus only the tracking generator fundamental frequency is displayed
45. on the analyzer s CRT Second and third order harmonics and intermodulation products are clearly out of the analyzer s CRT Second and third order harmonics and intermodulation products are clearly out of the analyzer tuning and therefore they are not seen Thus while these distortion products may exist in the measurement set up they are completely eliminated from the CRT display The 1dB gain compression level is a point of convenience but it is nonetheless considered the upper limit of the dynamic range The lower limit on the other hand is dictated by the analyzer sensitivity which as we know is bandwidth dependent The narrowest usable bandwidth in turn is limited by the tracking generator residual FM and any tracking drift between the analyzer tuning and the tracking generator signal Mainly Performance and Calibration of AT5005 5006 Series Spectrum Analyzer 1 Structural integrity No obvious impairment and gilding damage all outside components are well installation reliable fasten and flexible operability Warm up for one hour to inspect the performances 2 Inspection of Y POS Adjust Y POS knob occurs hand feeling by obvious locating point Failures in adjusting the locating point will lead to all measured amplitudes are invalid 3 Accuracy of frequency readout Not exceed 2 spectrum width 100kHz 4 Inspection of frequency range Output 0 15MHz 500MHz frequency signal from a signal generator screen s
46. optimum operation of the instructions need to be followed Attention The most sensitive component of the AT 5010 AT 5011 is the input section of the Spectrum Analyzer It consists of the signal attenuator and the first mixer Without input attenuation the voltage at the input must not exceed 10 dB 0 7 Vrms AC or 25 volt DC With a maximum input attenuation of 40dB the AC voltage must not exceed 20dBm These limits must not be exceeded otherwise the input attenuator and or the fist mixer would be destroyed When measuring via a LISN line impedance stabilization network the input of the Spectrum Analyzer must be protected by means of a transient limiter Az560 Prior to examining unidentified signals the presence of unacceptable high voltages has to be checked It is also recommended to start measurements with the highest possible attenuation and a maximum frequency range 500MHz The user should also consider the possibility of excessively high signal amplitudes outside the covered frequency range although not displayed e g 1200MHz The frequency range of OHz 150K Hz is not specified for the AT5005 06 Spectrum Analyzer Spectral lines within this range would be displayed with incorrect amplitude A particularly high intensity setting shall be avoided The way signals are displayed on the spectrum analyzer typically allows for any signal to be recognized easily even with low intensity Due to the frequency co
47. 43Hz 100 134 80dB 10dB 27dBm 13dBm 10dB x 2dB 90dBm 20kHz 99dBm 2 3 lt 554 3 704 gt 3MHz 90dBm 2dB 250MHz 0 40dB 4x 10dB 1dB 10dB 10dBm 25VDC j OdB 20dBm 40dB 100kHz f amp 100MHz f amp t 1 2 5 0Hz 0 ed gt 0 15MHz 500MHz 0 40dB 4x 10dB 1dB e 1 5dB 500 BNC e lt 204 50 ldBm 10dB 6I CRT 8 x 10 220V 10 50Hz 60Hz He 2420W 0 40 C o I 1EC1010 1 e 7 Kg e NF 380 x 285 x 125 LxWxH mm 500 BNC gt 80 AM FM AZ530 1GHz AZ530 3
48. 50 dB above the noise Set generator frequency to 500 Adjust the peak of the 500MHz spectral line to the horizontal screen center using the X POS control 16 D Set the generator frequency to 100MHz If the 100 2 spectral line is not on the 2nd graticule line fromleft it should be aligned using the X AMPL Control 17 Then the calibration as de scribed under be verified and corrected if necessary The calibrations C and D should be repeated until optimum adjustment is achieved Introduction to Spectrum Analysis The analysis of electrical signals is a fundamental problem for many engineers and scientists Even if the immediate problem is not electrical the basic parameters of interest are often changed into electrical signals by means of transducers The rewards for transforming physical parameters to electrical signals are great as many instruments are available for the analysis of electrical signals in the time and frequency domains The traditional way of observing electrical signals is to view them in the time domain using an oscilloscope The time domain is used to recover relative timing and phase information which is needed to characterize electric circuit behavior However not all circuits can be uniquely characterzed from just time domain information Circuit elements such as amplifiers oscillators mixers modulators detectors and filters are best characterized by their frequency response inform
49. 50MHz 5 x 500MHz 0Hz 1 50OMHz 500MHz 1 1 2 AM 0 0 BRL 099 BOE zs LED 16 X 17
50. I IEC 1010 1 Weight approx 7Kg Dimensions 380 285 x 125 L W H mm Input impedance 50 Socket BNC Load resistance gt 8 AM FM demodulation output Near Field Sniffer Probes 2530 Olny for 1GHz Spectrum Analyzer The AZ530 is the ideal toolkit for the investigation of RF electromagnetic fields Lt is indispensable of EMI pre compliance testing during product development prior to third party testing The set includes 3 hand held probes with a built in pre amplifier covering the frequency range from 100kHz to over 1000MHz The probes ove magnetic field probe one electric field probe and one high impedance probe are all matched to the 50 inputs of Spectrum analyzers or RF receivers The power can be supplied either from batteries Ni Cads or through a power cord directly connected to an AT5005 AT5006 series spectrum analyzer Signal feedis via a 1 5m BNC cable When used in conjuction with a spectrum analyzer or measuring receiver the probes canbe used to locate and qualify EMI sources as well as evaluate EMC problems at the breadboard and prototype level They enable the user to evaluate radiated fields and perform shield effectiveness comparisons Mechanical screening performance and immunity tests on cables and components are easily performed e Frequency range 0 1MHz to 1000MHz lower frequency limit depends on probe type Output impedance 50 Q Output connector BNC Input capacitance
51. N shall not be obliged to provide service under this warranty to repair damage resulting from attempts by personnel other than ATTEN representatives to install repair service or modify these products In order to obtain service under this warranty Customers must contact and notify the distributor who has sold the product Each instrument is subjected to a quality test with 10 hour burn in before leaving the production Practically all early failures are detected by this method In the case of shipments by post rail or carrier it is recommended that the original packing is carefully preserved Transport damages and damage due to gross negligence are not cover by the warranty In the case of a complaint a label should be attached to the housing of the instrument which describes briefly the faults observed If at the same time the name and telephone number dialing code and telephone or direct number or department designation is stated for possible queries this helps towards speeding up the processing of warranty claims Maintenance Various important properties of the Spectrum Analyzer should be carefully checked at certain intervals Only in this it largely certain that all signals are displayed with the accuracy on which the technical data are based The exterior of the instrument should be cleaned regularly with a dusting brush Dirt which is difficult to remove on the casing and handle the plastic and aluminum parts c
52. OE Foxit PDF Editor x 4 lt eeE D Qi by Foxit Software Company 20042 EA If you have any advice or requirements please feedback or call 0755 8602 1373 AI s manual thoroughly before operation ATTEN INSTRUMENTS ATTEN PRODUCTS e e Spectrum Analyzer e RF amp Microwave Components THE HIGH TECH POPULARIZER e XE TB IS e e e 850 e Signal Generator Frequency Counter e Oscilloscope e Regulated DC Power Supply e Regulated AC Power Supply e Switching Power Supply e Power Inverter e Attenuator e Amplifier e 850 Rework Station e Soldering Station FRANCHISER 2007 Atten Corporation 76 0020001 1 Made in China AT5005 AT5006 SPECTRUM ANALYZERS BAIS User s Manual 5005 5006 SPECTRUM ANALYZERS Thanks for using our products please read this manual thor
53. affordable with the 500 Interface Applications e ATspectrum analyzer can carry out good inspection to the faults of cable system and wireless system including remote control cordless phone cable TV and communication equipment as well as good comparison and analysis to frequency of signals e AT5005 spectrum analyzer can test mobile phone RF circuits for example control signal of logic circuit baseband signal local oscillator signal of RF circuit IF signal and transmission signal It is very quick and accurate to use AT5005 spectrum analyzer to overhaul the fault of mobile phone which can not enter the network and determine the fault point e Electromagnetic Compatible EMC Testing measure the function of harmful electromagnetic wave to be transmitted by various electronic equipments In addition it can output AM FM demodulation signal from socket PHONE identify the broadcast signal affected by noise From authorization aspect it is very effective measurement function for the evaluation and research in advance to carry out the measurement of radioactive noise e Widely used for production development education and scientific research True form of signal such as RF pulse signal can be observed from ATTEN spectrum analyzer clearly where figures are expanded by Fourier series good for apprehend in education and research Specifications Frequency range 0 15MHz to 500MHz Center frequency display accurac
54. an be removed with a moistened cloth 99 water 1 mild detergent Spirit or washing benzine petroleum ether can be used to remove greasy dirt The screen may be cleaned with water or washing benzene but not with spirit alcohol or solvents it must then be wiped with a dry clean lint free cloth Under no circumstances may the cleaning fluid get into the instrument The use of other cleaning agents can attack the plastic and paint surfaces Switching over the mains line voltage The spectrum analyzer operates on mains line voltages of 115V AC and 230V AC The voltage selection switch is located on the rear of the instrument and displays the selected voltage can be selected using a small screwdriver Remove the power cable from the power connector prior to making any changes to the voltage setting The fuses must also be replaced with the appropriate value see table below prior to connecting the power cable Both fuses are externally accessible by removing the fuse cover located above the 3 pole power connector The fuseholder can be released by pressing its plastic retainers with the aid of a small screwdriver The retainers are located on the right and left side of the holder and must be pressed towards the center The fuse s can then be replaced and pressed in until locked on both sides Use of patched fuses or short circuiting of the fuseholder is not permissible ATTEN assumes no liability whatsoever for any damage cau
55. ation This frequency informat5ion is best obtained by viewing electrical signals in the frequency domain To display the frequency domain requires a device that can discriminate between frequencies while measuring the power level at each One instrument which displays the frequency domain is the spectrum analyzer It graphically displays voltage or power as a function of frequency only on a CRT cathode ray tube In the time domain frequency components of a signal are seen summed together In the frequency domain complex signals 1 signals composed of more than one frequency are separated into their frequency components and the power level at each frequency is displayed The frequency domain is a graphical representation of signal amplitude as a function of frequency The frequency domain contains information not found in the time domain and therefore the spectrum analyzer has certain advantages compared with an oscilloscope The analyzer is more sensitive to low level distortion than a scope Sine waves may look in the time domain but in the frequency domain harmonic distortion can be seen The sensitivity and wide dynamic range of the spectrum analyzer is useful for measuring low level modulation It can be used to measure AM FM and pulsed The analyzer can be used to measure carrier frequency modulation frequency modulation level and modulation distortion Frequency con version devices can be easily characterized
56. averaged the input signal may be seen If the resolution bandwidth is very narrow for the span the span the video filter should no be selected as this will not allow the amplitude of the analyzed signals to reach full amplitude due to its video bandwidth limiting property Spectrum Analyzer Sensitivity Specifying sensitivity on a spectrum analyzer is somewhat arbitrary One way of specifying sensitivity is to define it as the signal level when signal power average noise power The analyzer always measures signal plus noise Therefore when the input signal is equal to the internal noise level the signal will appear 3dB above the noise When the signal power is added to the average noise power the power level on the CRT is doubled increased by 3dB because the signal power average noise power The maximum input level to the spectrum analyzer is the damage level or burn out level of the input circuit This is for the AT5005 06 10dB for the input mixer and 20dB for the input attenuator Before reaching the damage level of the analyzer the analyzer will begin to gain compress the input signal This gain compression is not considered serious until it reaches 1dB The maximum input signal level which will always result in less than 1dB gain compression is called the linear input level Above 1dB gain compression the analyzer is considered to be operating nonlinearly because the signal amplitude displayed in the CRT is not an acc
57. e center frequency is indicated by the vertical graticule line at middle of the horizontal axis If the center frequency and the scan width settings are correct the X axis has a length of 10 divisions On scan width settings lower than 100MHz only a part of the entire frequency range is displayed When SCAN WIDTH is set to 100MHz div and if center frequency is set to 500 2 the displayed frequency range extends to the right by SOMHz per division ending at 5 00MHz 250MHz 5 x 500MHz The frequency decreases to decreases to the left in a similar way In this case the left graticule line corresponds to OHz With these settings a spectral line is visible which is referred to Zero Frequency It is the Ist LO oscillator which becomes visible when its frequency passes the first IF filter This occurs when the center frequency is low relative to the scan width range selected The Zero Frequency is different in level in every instrument and therefore cannot be used as a reference level Spectral lines displayed left of the Zero Frequency Point are so called image frequencies In the ZERO SCAN mode the Spectrum Analyzer operates like Spectral line s passing the IF filter cause a level display selective voltmeter function The selected scan width div settings are indicated by a number of LEDs above the range setting push buttons 16 X POS X position 17 X AMPL X amplitude Important These controls
58. easurements a spectrum analyzer should be as flat as possible over its frequency range Flatness is usually the limiting factor in amplitude accuracy since its extremely difficult to calibrate out And since the primary function of the spectrum analyzer is to compare signal levels at different frequencies a lack of flatness can seriously limit its usefulness Tracking Generators The tracking generator 475005 only is a special signal source whose RF output frequency tracks follows some other signal beyond the tracking generator itself In conjunction with the spectrum analyzer the tracking generator produces a signal whose frequency precisely tracks the spectrum analyzers tuning The tracking generator frequency precisely tracks the spectrum analyzer tuning since both are effectively tuned by the same VTO This precision tracking exists in all analyzer scan modes Thus in full scan the tracking generator output is a start stop sweep in zero scan the output is simply a CW signal The tracking generator signal is generated by synthesizing and mixing two oscillators One oscillator is part of the tracing generator itself the other oscillator is the spectrum analyzer s 1st LO the spectrum analyzer tracking generator system is used in two configurations open loop and closed loop In the open loop configuration unknown external signals are connected to the spectrum analyzer input and the tracking generator output is connected to a
59. f an extension cord without a protective conductor The mains line plug should be inserted before connections are made to measuring circuits The grounded accessible metal parts case sockets jacks and the mains line supply contacts line live neutral of the instrument have been tested against insulation breakdown with 2200V DC Under certain conditions 50Hz or 60Hz hum voltages can occur in the measuring circuit due to the interconnection with other mains line powered equipment or instruments This can be avoided by using an isolation transformer Safety Class II between the mains line outlet and the power plug of the device being investigated Most cathode ray tubes develop X rays However the dose equivalent rate falls far below the maximum permissible value of 36pA kg 0 5mR h Whenever it is likely that protection has been impaired the instrument shall be made inoperative and be secured against any unintended operation The protection is likely to be impaired if for example the instrument e Shows visible damage e Fails to perform the intended measurements e Has been subjected to prolonged storage under unfavorable conditions e g in the open or in moist environments e Has been subject to severe transport stress e G in poor packaging Operating conditions The instrument has been designed for indoor use The permissible ambient temperature range during operation is 10 C 50 F 40 C 104 F I
60. he video filter may be used to reduce noise on the screen It enables small level spectral lines to become visible which normally would be within or just above the medium noise level The filter bandwidth is 4kHz 12 Y Position Control for adjusting the vertical beam position 13 Input The BNC 50 input of the Spectrum Analyzer Without input attenuation the maximum permissi ble input voltages of 25V DC and 10dBm AC must not be exceeded With the maximum input attenuation of 40dB the maximum input voltage is 20dBm The maximum dynamic range of the instrument is 70dB Higher input voltages exceeding the reference level cause signal compression and intermodulation Those effects will lead to errone ous displays If the input level exceeds the reference level the input level attenuation must be increased 14 Attenuator The Input Attenuator consists of four 10dB attenuators reducing the signal height before nter ing the 1st mixer Each attenuator is active if the push button is depressed The correlation of selected attenuation reference level and baseline level noise level is according to the following listing Attenuation Reference level Base line OdB 27dBm 10 107dBm 10dB 174 31 6mV 97dBm 20dB 7dBm 0 1V 87dBm 30dB 3dBm 316mV 774 40dB 13dBm 1V 67dBm The reference level is represented by the upper horizontal graticule line The lowest horizontal graticule line ind
61. hose center frequency is tunable over a desired frequency range a detector to produce vertical deflection on a CRT and a horizontal scan generator used to synchronize the tuned frequency to the CRT horizontal deflection It is a simple inexpensive analyzer with wide frequency coverage but lacks resolution and sensitivity Because trf analyzers have a swept filter they are limited in sweep width depending on the frequency range usually one decade or less The resolution is determined by the filter bandwidth and since tunable filters don t usually have constant bandwith is dependent on frequency The most common type of spectrum analyzer differs from the trf spectrum analyzers in that the spectrum is swept through a fixed bandpass filter instead of sweeping the filter through the spectrum The analyzer is swept through a narrowband receiver which is electronically tuned in frequency by applying a saw tooth voltage to the frequency control element of a voltage tuned local oscillator This same saw tooth voltage is simultaneously applied to the horizontal deflection plates of the CRT The output from the receiver is synchronously applied to the vertical deflection plates of the CRT and a plot of amplitude versus frequency is displayed The analyzer is tuned through its frequency range by varying the voltage on the LO local oscillator The LO frequency is mixed with the input signal to produce an IF intermediate frequency which ca
62. hould display the complete signals inspect frequency range of tracking signal generator connect output port with frequency counter both output attenuation and bandwidth are zero adjust CF knob to check the signal generator could output 0 15MHz 500MHz signal or not 5 Inspection of reference level 2dB at 250MHz Output 250MHz frequency and 27dBm level signal from signal generator to spectrum analyzer Set spectrum analyzer CF at 250MHz scanwidth 2MHz DIV center frequency 400kHz with zero input attenuation And signal amplitude should up to top line Inspect the output level of tracking generator connect input to output with a coaxial cable with CF250MHz scanwidth OMHZ DIV input attenuation 30dB maximum output then amplitude should lower the top line than one graticule 6 Frequency Response It means signal response of spectrum analyzer in measuring equal level and different frequency Since the primary function of the spectrum analyzer is to compare signal levels at different frequencies a lack of flatness can seriously limit its usefulness 7 Inspection of attenuators 0 40dB 4 X 10dB step 1dB 10dB 3 2dB 40dB 8 Residual response andinterference immunity Short circuit the input by connect 50 terminal load to input port then signal response should not appears in screen Otherwise it may seriously affect the ability of spectrum analyzer in analyzing small signals Replace the 50 termi
63. icates the baseline The vertical graticule is subdivided in 10dB steps As previously pointed out the maximum permissible input voltages may not be exceeded This is extremely important because it is possible that the Spectrum Analyzer will only show a partial spectrum of currently applied signals Consequently input signals might be applied with excessive levels outside the displayed frequency range leading to the destruction of the input attenuator and or the 1st mixing stage Also refer to INPUT The highest attenuation 4 x 0dB and the highest usable frequency range scan width setting 50MHz DIV should be selected prior to any spectral to the AT5005 06 input This permits the detection of any spectral lines which are within the maximum measurable and displayable frequency range if the center frequency is set to 250MHz If the baseline tends to move upwards up wards when the attenuation is decreased it may indicate spectral lines outside the maximum displayable frequency range i e 1200MHz with excessive amplitude 15 Scanwidth lt gt Push buttons The SCAN WIDTH selectors allow to control the scanwidth per division of the horizontal axis The frequency Div can be increased by means of the gt button and decreased by means of the lt button Switching is accomplished in 1 2 5 steps from 100kHz div to 500kHz div The width of the scan range is displayed in MHz div and refers to each horizontal division on the graticule Th
64. ications First check the distortion spec For example this might be all spurious products 70dB down for 27dBm at the input mixer Then determine that adequate sensitivity exists For example 70dB down from 27dBm is 97dB This is the level we must be able to detect and the bandwidth required for this sensitivity must not be too narrow or it will be useless Last the display range must be adequate Notice that the spurious free measurement range can be extended by reducing the level at the input mixer The only limitation then is sensitivity To ensure a maximum dynamic range on the CRT display check to see that the following requirements are satisfied e The largest input signal does not exceed the optimum input level of the analyzer typically 27dBm with 0dB input attenuation e The peak of the largest input signal rests at the top of the top of the CRT display reference level Frequency Response The frequency response of an analyzer is the amplitude linearity of the analyzer over its frequency range If a spectrum analyzer is to display equal amplitudes for input signals of equal amplitude independent of frequency then the conversion power loss of the input mixer must not depend on frequency If the voltage from the LO is too large compared to the input signal voltage then the conversion loss of the input mixer is frequency dependent and the frequency response of the system is nonlinear For accurate amplitude m
65. m 1dBm to 50dBm 24 attention AT5006 only Output level attenuator with four 10dB attenuators which allows the signal to be reduced prior to reaching the OUTPUT socket All four attenuators are equal and can be activated by pressing the respective push button Therefore it is irrelevant which attenuators are used to reach e g a 20dB attenuation Vertical Calibration Ensure all input attenuators in released position before calibration When the signal amplitude reaches to the highest level line the signal amplitude is 27dBm and it will reduce 10dBm for each division drop If the 40dB attenuator in the spectrum analyzer is completely pressed down the highest level amplitude will be 13dBm 27dBm 40dBm Prior to calibration ensure that all input attenuators 14 are released The AT5005 06 must be in operation for at least 60 minutes prior to calibration Switch VIDEO FILTER 11 to OFF position set BANDWIDTH 10 to 400kHz and SCAN WIDTH 15 to 2MHz div Connect RF signal of 27dBm 0 2dB 10mV to the spectrum analyzer input 13 The frequency of this signal should be between 2MHz and 250MHz Set the center frequency to the signal frequency A A single spectral line 27dBm appears on the screen The spectral line maximum is now adjusted with the Y POS control 12 and placed at the top graticule line of the screen All input attenuators switches have to be released The following adjustment is only nece
66. n be detected and displayed and displayed When the frequency difference between the input signal and the LO frequency is equal to the IF frequency then there is a response on the analyzer The advantages of the superheterodyne technique are considerable It obtains high sensitivity through the use of IF amplifiers and many decades in frequency can be tuned Also the resolution can be varied by changing the bandwidth of the IF filters However the superheterodyne analyzer is not real time and sweep rates must be consistent with the IF filter time constant A peak at the left edge of the CRT is sometimes called the zero frequency indicator or local oscillator feedthrough It occuts when the analyzer is tuned to zero frequency and the local oscillator passes directly through IF creating a peak on the CRT even when no input signal is present For zero frequency tuning FLO FIF This effectively limits the lower tuning limit Spectrum Analyzer Requirements To accurately display the frequency and amplitude of a signal on a spectrum analyzer the analyzer itself must be properly calibrated A spectrum analyzer properly designed for accurate frequency and amplitude measurements has to satisfy many requirements Wide tuning range Wide frequency display range Stability Resolution Flat frequency response High sensitivity Low internal distortion Frequency Measurements The frequency scale can be scanned in three differe
67. nal load off input port noise base line should not raise especially the tracking source cannot affect the instrument In a common room no signal response appears in screen 9 Inspection of sensibility Sensibility should better than 95dB Output a 95dBm signal with a standard signal generator set CF in the frequency with IF 20kHz 0 1MHz DIV scanwidth video filter on Spectrum analyzer is able to measure the signal 10 Grass level The typical value is 15dB when IF bandwidth is 400kHz otherwise the sensibility of he unit is too inferior to analyze smaller signals m E E E ss Er S enl 52 5 i b at a Ye amp 85 B a es iln rn 1358 x LISE l S 5005 06 1E EI PIS 4x10dB MR AT5006 2 ASZ xeu qu QH 02 SOINOY193 73 N3HZN3HS itl Be ETH E vos 1758 HJZATVNV Wnloads ZHINOOS 2 ZH AS IO 005 sjuoumajsuj z 2 x HLGIMNV O3Hd4H31N3O e 3 SN3ANI 4 ZHMOOV wo HLGIM an
68. nt modes full per division and zero scan The full scan mode is used to locate signals because the widest frequency ranges are displayed in this mode Not all spectrum analyzers offer this mode The per division mode is used to zoom in on a particular signal In per division the center frequency of the display is set by the Tuning control and the scale factor is set by the Frequency Span or Scan Width control In the zero scan mode the analyzer acts as a fixed tuned receiver with selectable bandwidths Absolute frequency measurements are usually made from the spectrum analyzer tuning dial Relative frequency measurements require a linear frequency scan By measuring the relative separation of two signals on the display the display the frequency difference can be determined It is important that the spectrum analyzer be more stable than the signals being measured The stability of the analyzer depends on the frequency stability of its local oscillators Stability is usually characterized as either short term or long term Residual FM is a measure of the short term stability which is usually specified in Hz peak to peak Short term stability is also characterized by noise sidebands which are a measure of the analyzers spectral purity Noise sidebands are specified in terms of dB down and Hz away from a carrier in a specific bandwidth Long term stability is characterized by the frequency drift of the analyzers Los Frequency drift is
69. nversion principle a spectral line is visible at 0Hz It is called If feedthrough The line appears when the Ist LO frequency passes the If amplifiers and filters The level of this spectral line is different in each instrument A deviation from the full screen does not indicate a malfunctioning instrument Control Elements The front view picture of the instrument see last page contains numbers referred to below 1 Focus Beam sharpness adjustment 2 Intens Beam intensity adjustment 3 Power Power ON and OFF If power is switched to ON position a beam will be visible on the screen after approximately 10 sec 4 TR Trace Rotation In spite of Mumetal shielding of the CRT effects of the earth s magnetic field on horizontal trace position cannot be completely avoided A potentiometer accessible through an opening can be used for correction Slight pincushion distortion is unavoidable and cannot be corrected 5 Marker ON OFF When the MARKER pushbutton is set to the OFF position the CF indicator is field on the horizontal When the switch is in the ON position MK is lit and the display shows the center frequency The marker is shown on the screen as a sharp peak The marker frequency is adjustable by means of the MARKER knob and can be aligned with a spectral line Switch off the marker before taking correct amplitude readings 6 CF MK Center Frequency Marker The CF LED is lit when the digital dis
70. oughly before operation tos cedi arto etse s 2 Yr 31 dll 3k AZ5302 amp 3 4 4 4 A menses HH eee 5 5 n 5 6 MM 6 eI M MIR 6 9 jr BEA 10 HMM 10 EAE 11 Sues cup UV nU 11 LT 11 ABE e 11 eai 12 12 ee M 13 E IE 13 14 5005 065 32 AT5005 34 AT5006 35 Contents Spectrum Analyzers 15 Near Field Sniffer Probes 7530 16 General Information pp 18 Symbols HH eee eene 18 18 Safety E E 19 Operating conditions HH 19 Warranty eee eee 19 20 Switching over the mains line voltage eee ee 20 21 Operating Instructions gt
71. ountermeasures can be judged easily One can investingate shields for leaking areas and cables or wires for conducted interference The E Field Monopole Probe The E field monopole probe has the highest sensitivity of the three probes It is sensitive enough to be used as an antenna for radio or TV reception With this probe the entire radiation from 2530 circuit or an equipment can be measured It is used for example for example to determine the effectiveness of shielding measures With this probe the entire effectiveness of filters can be measured by measuring the RFI which is conducted along cables that leave the equipment and may influence the total radiation In addition the E field probe may be used to perform relative measurements for certification tests This makes it possible to apply remedial suppression measures so that any re qualification results will be positive In addition pre testing for certification tests may be performed so that no surprises are encountered during the certification tests The High Impedance probe The High impedance probe Hi Z permits the determination of the radio frequency interference RFI on individual contacts or printed circuit traces It is a direct contact probe The probe is of very high impedance near the insulation resistance of the printed circuit material and is loading the test point with only 2pF 800 at 1GHz Thereby one can measure directly in a
72. play shows the center frequency The center frequency is the frequency which is displayed in the horizontal center of the CRT The MK LED is lit when the Marker pushbutton is in the ON position The digital display shows the marker frequency in that case 7 Digital Display Display of Center Frequency Marker Frequency 7 segm Display with 100kHz resolution 8 Uncal Blinking to this LED indicates incorrectly displayed amplitude values This is due to scanwidth and filter setting combinations which give to low amplitude readings because the If filters have not being settled This may occur when the scanned frequency range SCANWIDTH is too large compared to the IF bandwidth 20kHz and or the video filter bandwidth 4kHz Measurements in this case can either be taken without a video filter or the scanwidth has to be decreased 9 Center frequency Coarse Fine Both rotary knobs are used for center frequency setting The center frequency is displayed at the horizontal center of the screen 10 Bandwidth Selects between 400kHz and 20kHz IF bandwidth If a bandwidth of 20kHz is selected the noise level decreases and the selectivity is improved Spectral lines which are relatively close together can be distinguished As the small signal transient response requires a longer time this causes incorrect amplitude values if the scanwidth is set at too wide a frequency span The UNCAL LED will indicate this condition 11 Video Filter T
73. r the D position 10 inclination the handle should be turned to the opposite direction of the carrying position until it locks in place automatically underneath the instrument For the E position 20 inclination the handle should be pulled to release it from the D position and swing backwards until if locks once more The handle may also be set to a position for horizontal carrying by turning it to the upper side to lock in the B position At the same time the instrument must be lifted because otherwise the handle will jump back Safety This instrument has been designed and tested in accordance with Publication 1010 1 Safety requirements for electrical equipment for measurement control and laboratory use The CENELEC regulations EN 61010 1 correspond to this standard It has left the factory in a safe condition This instruction manual contains important information and warnings which have to be followed by the user to ensure safe operation and to retain the Spectrum Analyzer in a safe condition The case chassis and all measuring terminals are connected to the protective earth contact of the appliance inlet The instrument operates according to Safety Class I three conductor power cord with protective earthing conductor and a plug with earthing contact The mains line plug shall only be inserted in a socket outlet provided with a protective earth contact The protective action must not be negated by the use o
74. s because the analyzer traces out its own IF band pass shape as it sweeps through a CW signal Since the resolution of the analyzer is limited by bandwidth it seems that by reducing the IF bandwidth infinitely infinite resolution will be achieved The fallacy here is that the usable IF bandwidth is limited by the stability residual Fm of the analyzer If the internal frequency deviation of the analyzer is 10kHz then the narrowest bandwidth that can be used to distinguish a single input signal is 10kHz Any narrower IF filter will result in more than one response or an intermittent response for a single input frequency Apractical limitation exists on the IF bandwidth as well since narrow filters have ling time constants and would require excessive scan time Sensitivity is a measure of the analyzer s ability to detect small signals The maximum sensitivity of an analyzer is limited by its internally generated noise The noise is basically of two types thermal or Johnson and nonthermal noise Thermal noise power can be expressed as P K T B Where P Noise power in watts K Boltzmanns Constant 1 38 X 10 Joule K T absolute temperature B bandwidth of system in Hertz As seen from this equation the noise level is directly proportional to bandwidth Therefore a decade decrease in bandwidth results in a 10dB decrease in noise level and consequently 10dB better sensitivity Nonthermal noise accounts for all noi
75. se produced within the analyzer that is not temperature dependent Spurious emissions due to nonlinearities of active elements impedance mismatch etc are sources of nonthermal noise A figure of merit or noise figure is usually assigned to this ninthermal noise which when added to the thermal noise gives the total noise of the analyzer system This system noise which is measured on the CRT determines the maximum sensitivity of the spectrum analyzer Because noise level changes with bandwidth it is important when comparing the sensitivity of two analyzers to compare sensitivity specifications for equal bandwidths A spectrum analyzer sweeps over a wide frequency range but is really a narrow band instrument All of the signals that appear in the frequency range of the analyzer are converted to a single IF frequency which must pass through an IF filter the detector sees only this noise at any time Therefore the noise displayed on the analyzer is only that which is contained in the IF passband When measuring discrete signals maximum sensitivity is obtained by using the narrowest IF bandwidth Video Filtering Measuring small signals can be difficult when they are approximately the same amplitude as the average internal noise level of the analyzer To facilitate the measurement it is best to use video filtering A video filter is a post detection low pass filter which averages the internal noise of the analyzer When the noise is
76. sed as a result and all warranty claims become null and void Fuse type Size 5x 20mm 250 Volt AC Must meet IEC specification 127 Sheet or DIN 41 662 or DIN 41 571 sheet 3 e Time characteristic time lag Line voltage 115V 10 Fuse rating T315mA Line voltage 230V 10 Fuse rating T160mA USE ONLY WITH 250V FUSE Introduction The spectrum analyzer permits the detection of spectrum components of electrical signals in the frequency range of 0 15 to 500MHz The detected signal and its content have to be repetitive In contrast to an oscilloscope operated in Yt mode where the amplitude is displayed on the time domain the spectrum analyzer displays amplitude on the frequency domain Yf The individual spectrum components of a signal become visible on a spectrum analyzer The oscilloscope would display the same signal as one resulting waveform The spectrum analyzer works according to the triple superhet receiver principle The signal to be measured f 0 15MHz to 500MHz is applied to the 1st mixer it is mixed with the signal of a variable voltage controlled oscillator f 1350MHz 2350MHz This oscillator is called the 1st LO local oscillator The difference between the oscillator and the input frequency fio f st IF is the first intermediate frequency which passes through a waveband filter tuned to a center frequency of 1350 2 It then enters an amplifier and
77. ssary for service purposes and if the check of this setting shows deviations of the correct settings The Y ampl Control is located on the XY PCB inside the instrument In case any adjustment of the vertical amplification is necessary please refer to the service manual B Next the generator signal must be switched back and forth between 27dBm and 77dBm and the Y AMPL Control adjusted so that thespectral line peak changes by 5 divisions in the vertical direction If this results in a change of the Y position the calibration outlined under A and B have to be repeated until an ideal adjustment is achieved Finally the operation of the input attenuators 14 can be tested at a level of 27dBm The spec tral line visible on the screen can be reduced in 4 steps of 10dB each by activating the attenuators incorporated in the spectrum analyzer Each 10dB step corresponds to one graticule division on the screen The tolerance may not exceed 1dB in all attenuation positions Horizontal Calibration Prior to calibration ensure that all input attenuator switches 14 are released The AT5005 06 must be operated for at least 60 minutes prior to calibration The VIDEO FILTER push button 11 must be in OFF position the BANDWIDTH 10 must be set to 400kHz and SCAN WIDTH 15 set to 100kHz div After the center frequency is set to 250MHz a generator signal must be applied to the input The output level should level should be between 40 and
78. t may occasionally be subjected to temperatures between 10 C 50 10 C 14 F without degrading its safety The permissible am bient temperature range for storage or transportation is A0 C 40 F 70 158 F The maximum operating altitude is up to 2200m non operating 1500m The maximum relative humidity is up to 80 If condensed water exists in the instrument it should be acclimatized before switching on In some cases e g extremely cold spectrum analyzer two hours should be allowed before the instrument is put into operation The instrument should be kept in a clean and dry room and must not be operated in explosive dusty or moist environments The spectrum analyzer can be operated in any position but the convection cooling must not be impaired For continuous operation the instrument should be used in the horizontal position preferably tilted upwards resting the tilt handle The specifications stating tolerances are only valid if the instrument has warmed up for 60 minutes at ambient temperature between 15 59 30 C 86 Values without tolerances are typical for an average instrument ATTEN warrants to its Customers that the products it manufactures and sells will be free from defects in materials and workmanship for a period of 1 years This warranty shall not apply to any defect failure or damage caused by improper use or inadequate maintenance and care ATTE
79. this is followed by two additional mixing stages oscillators and amplifiers The second IF is 29 875MHz and the third is 2 75MHz in the third IF stage the signal can be selectively transferred through a filter with 400kHz or 20kHz bandwidth before arriving at an AM demodulator The logarithmic output video signal is transferred directly or via a low pass filter to another amplifier This amplifier output is connected to the Y deflection plates of the CRT The X deflection is performed with a ramp generator voltage This voltage can also be superim posed on a dc voltage which allows for the control of 1st LO The spectrum analyzer scans a frequency range depending on the ramp height This span is determined by the scanwidth ser ting In ZERO SCAN mode only the direct voltage controls the 1st LO The AT5006 also includes a tracking generator This generator provides sine wave voltages within the frequency range of 0 15 to 500MHz The tracking generator is determined by the first oscillator 1st LO of the spectrum analyzer section Spectrum analyzer and tracking generator are frequency synchronized Operating Instructions It is very important to read the paragraph Safety including the instructions prior to operating the AT5005 06 No special knowledge is necessary for the operation of the AT5005 06 The straightforward front panel layout and the limitation to basic functions guarantee efficient operation immediately To ensure
80. urate measure of the input signal level Whenever a signal is applied to the input of the analyzer distortions are produced within the analyzer itselt Most of these are caused by the non linear behavior of the input mixer For the AT5005 06 these distortions are typically 70dB below the input signal level for signal levels not exceeding 27dBm at the input of the first mixer To accommodate larger input signal levels an attenuator is placed in the input circuit before the first mixer The largest input signal that can be applied at each setting of the input attenuator while maintaining the internally generated distortions below a certain level is called the optimum input level of the analyzer The signal is attenuated before the first mixer because the input to the mixer must not exceed 27dB or the analyzer distortion products may exceed the specified 70dB range This 70dB distortion free range is called the spurious free dynamic range of the analyzer The display dynamic range is defined as the ratio of the largest signal to the smallest signal that can be displayed simultaneously with no analyzer distortions present Dynamic range requires several things then The display range must be adequate no spurious or unidentified response can occur and the sensitivity must be sufficient to eliminate noise from the displayed amplitude range The maximum dynamic range for a spectrum analyzer can be easily determined from its specif
81. va m 440 GOOGLV Mal 30024 900517 111950 ydwy 962 Tid pauo 91 Aeidsia 031 Jorenuenyr O1 u0 Jet JH Joyyduy 6 POL Xb Nid tuper mpm pepe eger n Sofort tns ps SOd A NIVEA E k mmm 4 Joyyduiy Joleleue9 po yams JOje1ouot x uloomes TM pwueos SOdA NIVDA Joleleue9 10u09 l bi EE ME on olpny e907 pig ZHINZL 129207 151 e007 El pma i ZHX0Sc Mg 4e9jeosald zHW6Z Joloalaa 4olelllosO 104211250 Jo0je1euet 4olelllosO Sseg pueg 7HX02 Mg zHWS 6z Ma zHW6 Z Jeblduv p hav pug Joyydury sould _ Em ued Ag dl Pag ssed pueg 31181 eave peed spor x ssed pueg Block Diagram AT5005 06 2G ASZ 906 ZHINOOS 93 ZHINSL O Ald ZHN 4 ZHX0z ZHMOSZ HLGIM anva 09000 O00 e DY Q 90091 3044 18 90061
82. y 100kHz Marker accuracy 0 1 span 100kHz Frequency display res 100kHz 4 2 digit LED Frequency scan width accuracy 10 Frequency stability better than 150kHz hour Resolution 400kHz and 20kHz Video Filter on 4kHz Sweep rate 43Hz Amplitude range 100dBm to 13dBm Screen display range 80dB 0dB div Reference level 27dBm to 13dBm in 10dB steps Reference level accuracy 2dB e Average noise level 99dBm 20kHz BW e Distortion lt 55dBc 2nd and 3rd harmonic 3rd order intermod 70dBc two signals gt 3MHz apart e Sensitivity Better than 90dBm e Log scale fidelity 2dB without Ref 250MHz e Input attenuator 0 to 40dB 4x 10dB steps e Input attenuator accuracy 1dB 10dB step e Max input level 10dBm 25VDC 0dB attenuation 20dBm 40dB attenuation e Frequency scan width 100kHz div to 100 2 div in 1 2 5 steps and OHz div Zero Scan Tracking Generator e Output Frequency 0 15MHz to 500 2 e Output attenuator 0 to 40dB 4x 10dB steps e Output attenuator accuracy 1dB e Frequency response 1 5dB e Output impedance 500 BNC e Radio Frequency Interference RFI lt 204 e Output level range 50dBm to 1dBm in 10dB steps and var General Specifications Display 6 inch 8x10 division graticule Trace rotation adjustment from front panel Power 220V 10 50Hz to 60Hz Power consumption approx 20W Operation Ambient 0 C to 40 C Safety Grade
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