Manuale d’uso / di manutenzione del prodotto N9340A del fabbricante Agilent Technologies
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Agilent N9340A Handheld Spectrum Analyzer User’ s Guide.
Notices © Agilent T echnologies, Inc. 2007 No part o f this ma nual may be reproduc ed in any form or b y any means ( including electronic storage and retrieval or translation into a foreign lang uage) without prior agreement and written consent from Agilent T e chnolo gies, Inc.
Notices © Agilent T echnologies, Inc. 2007 No part o f this ma nual may be reproduc ed in any form or b y any means ( including electronic storage and retrieval or translation into a foreign lang uage) without prior agreement and written consent from Agilent T e chnolo gies, Inc.
CAU- CAUTION A CAUTIO N notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed beyond a CAUTI ON notice until the indicated conditions are fully understood and met.
1 1 N9340A Overview Introduction 2 Functionality 2 Optimized Usability 3 Front Panel Overview 4 T op Panel Overview 5 Display Annotations 6 Wor k i n g w it h B a t t e r i es 7 Installing a Battery 7.
2 Measuring a Low-Level Signal 31 Improving Freq uency Resolution and Accuracy 36 Making Distortion Measurements 37 One-button Power Measurement 43 Making a Stimulus Response T r ansmission Measuremen.
3 Y Axis Units 72 BW/SWP 73 RBW 73 VBW 74 VBW/RBW 74 Avg T ype 74 Sweep Time 76 Sweep 77 Enter 79 ESC/CLR 80 Frequency 81 Center Frequency 81 Start Frequency 81 Stop Frequency 81 CF Step 82 Marker 83 .
4 Save T race 94 Save As 94 Recall T r ace 94 Limit 95 Limit Line 95 Limit Pattern 95 Set Pattern 95 Limit T ype 95 Beep 96 Save Pattern 96 Recall Pattern 96 6 SCPI Command Reference SCPI Language Bas.
5 Initiate a single sweep 117 INST ru ment Subsystem 118 Select One button measurement 118 MEASure Subsystem 119 OBW Subsection 119 ACPR Subsection 119 SENSe Subsystem 123 [:SENSe]:A VERage Subsection.
6 T r igger Source 139 UNIT Subsyst em 141 7E r r o r M e s s a g e s Error Message List 144 8 Menu Map AMPTD 150 BW/SWP 151 FREQ 152 MARKER 153 MEAS 154 SP AN 15 5 SYS 156 TRACE 157 Limit 158.
1 Agilent N9340A Handheld Spectrum Analyzer Agilent T echnologies 1 N9340A Overview.
1 N9340A Overview 2 N9340A User’s Guide Introduction An Agilent N9340A is a handheld spectrum analyzer with a frequency range from 100 kHz to 3 GHz, tunable to 9 kHz. The analyzer pro vides ultimate measurement f lexibility in a package th at is ruggedized for field environments and convenient for mobile applications.
N9340A Overview 1 N9340A User’s Guide 3 4 Powe r S u i t e Pro vides one- button measurement functionality on OBW (Occupied Bandwidth) , channel pow er , an d AC P R (Adjacent Channe l Po wer Ratio) .
1 N9340A Overview 4 N9340A User’s Guide Front Panel Overview N9340A HANDHELD SPECTR UM AN ALYZER 100 kHz - 3.0 GHz PRESET ENTER FREQ SPAN AMPTD BW/ SWP SYS MODE MEAS TRACE ESC/ CLR 2 DEF 3 GHI 1 ABC.
N9340A Overview 1 N9340A User’s Guide 5 T op Panel Overview PC Ext . Pow er 12-18 VDC 80 W MAX Cha rgi ng R F IN PUT 50 RF OU T 50 EX T TR IG IN/ EXT REF I N 50 VDC MAX 33 dBm (2 W) MAX 1 2 8 3 4 5 6 7 9 12-18 VDC 55W MAX 1. DC Connector Pro vides input for the DC pow er source via an A C- DC adapter .
1 N9340A Overview 6 N9340A User’s Guide Display Annotations 1 2 3 4 5 6 7 8 9 10 12 11 13 14 Description Associated Function Key 1T i m e a n d D a t e [ SYS] > {Setting} > {General} 2 Referen.
N9340A Overview 1 N9340A User’s Guide 7 W orking with Batteries Use the original batter y supplied wit h the instrument or a genuine equivalent replacemen t from Agilent. Installing a Battery Vie w i n g B a t t e ry S t a tu s Deter mine the batter y st atus by: • Checking the batter y ic on, which indicates t he appro ximate level of charge.
1 N9340A Overview 8 N9340A User’s Guide Charging a Battery Y ou can only charge the batter y when it is in the analyzer either in operat ing or when t he analyzer is shut down. Full y charg e the battery bef ore first using t he analyzer . This typically t akes about f our hours.
9 Agilent N9340A Handheld Spectrum Analyzer Agilent T echnologies 2 Getting Started Conventions 1. A pair of curly brackets { } indica tes a softkey, for example {Start} refers to the Start softkey . 2. A pair of square b rackets [ ] indic ates a hardkey, for example, [ENTER] refers t o the ENTER hardkey.
2 Getti ng Started 10 N9340A User’s Guide Checking Shipment and Order List W e recommend you check the shipment and order list according to the follo wing procedure when y ou receive the shipment.
Getting St arted 2 N9340A User’s Guide 11 Power Requirements The A C pow er supply must meet the following requirements : The analyzer is equipped wit h a three- wire pow er cord, in accordance with int ernational safety standards. This cable grounds t he analyzer cabinet when connected to an ap propriate po wer line outlet.
Plug T ype Cable Part Number Plug a Description For use in Country & Region 250V 10A 8121-1703 BS 1363/A Option 900 United Kingdom, Hong Kong, Singapore, Malaysia 8120-0696 AS 3112:2000 Option 901.
Getting St arted 2 N9340A User’s Guide 13 Safety Considerations Agilent has designed and te sted the N9340A handheld spectrum analyzer fo r Measurement, Control and Laborator y Use in accordance with Safety Requirements IEC 61010- 1: 2001, UL 61010- 1 (2004), and CSA C22.
2 Getti ng Started 14 N9340A User’s Guide WARNING Danger of explosion if the ba ttery is incorrectly replaced. Replace only with the same typ e recommended. WARNING Do NOT dispose of batteries in a fire. Do NOT place batteries in the trash. Batteries must be recycled or disposed of properly.
Getting St arted 2 N9340A User’s Guide 15 Environmental Requirements A N9340A is designed for use under the follo wing conditions: • Operating temperature: –10 C to +50 C (with batter y) 0 C to .
2 Getti ng Started 16 N9340A User’s Guide industr y accept ed techniques for handling static sensitive devices should attem pt to service circuitry with thes e de vices .
Getting St arted 2 N9340A User’s Guide 17 Powering on the Analyzer for the First T ime A N9340A is fitt ed with a transf lective screen, which is viewable under all lighting conditions. In bright lighting conditions, t he display is brighter and easier to read when you allow light to fall directly on the screen.
2 Getti ng Started 18 N9340A User’s Guide Preparation for Use Use [SYS] hardkey to check or set the sys tem settings of your analyzer . Setting up your N9340A 1 Press [SYS] > {Setting} > {General} to set time and pow er sa ving mode : • Press {Time/Date} to set the time and date for your an alyzer .
Getting St arted 2 N9340A User’s Guide 19 Checking Instrument Information 1 Press [SYS] > {More (1 of 3)} > {Show System} to display the system information. 2 Press [SYS] > {More (2 of 3)} > {Option} to display the option information. 3 Press [SYS] > {More (1 of 3)} > {Show Error} to display the error information.
2 Getti ng Started 20 N9340A User’s Guide Making a Basic Measurement This section provide s information on basic analyzer ope ra tio ns w ith th e as sum ption that y ou understand th e front and top lay out, and display annota tions of your analyzer .
Getting St arted 2 N9340A User’s Guide 21 Viewing a Signal 1 Use a signal generator to generate a continuous- wave signal (1 GHz, 0 dBm). 2 Press [SYS] > {More (1 0f 3)} > {Preset} and select Default to tog gle th e pr ese t se tt ing to factor y- defined s tatus.
2 Getti ng Started 22 N9340A User’s Guide Some helpful tips Performing a time-base calibration A N9340A pro vides a manual calibration function to ca lib ra te the tim e ba se.
Getting St arted 2 N9340A User’s Guide 23 Upgrading Firmware A N9340A pro vides an easy and fast acces s for firmw ar e up da te. 1 Set up a folder named N9340D AT A in the root director y of your USB memory stick. 2 Store t he fir mware update applicatio n into t he folder named N9340D AT A.
2 Getti ng Started 24 N9340A User’s Guide Contact Agilent T echnologies Agilent has Sales and Service Of f ices around the w or ld to pr o vid e y ou with c om pl ete sup port. Go to http://www .agilent.com/find/assist , f or help with: • product selection, configuration, and purchases.
25 Agilent N9340A Handheld Spectrum Analyzer 3 Making Measurements.
3 Making Measurements 26 N9340A User’s Guide Measuring Multiple Signals This section prov ides information on measuring multiple signals. Comparing Signals on the Same Screen An N9340A pro vides an easy function fo r you to compare frequency and amplitude differences between signals, such as radio or television signal spectra.
Making Measurements 3 N9340A User’s Guide 27 6 Mov e the second marker to another signal peak using the front panel knob or by using the {Pe ak Search } softk e y: • Press [MARKER] > {Peak Search} > {Next R ight PK} or {Next Left PK} .
3 Making Measurements 28 N9340A User’s Guide Resolving Signals of Equal Amplitude In this example a decrease in resolution bandwidth is used in combination wit h a decrease in video bandwidth to reso lv e tw o signa ls of equal amplitude with a frequency separation of 100 kHz.
Making Measurements 3 N9340A User’s Guide 29 Use the knob or the ar ro w ke ys to fur ther reduce the resolution bandwidth and better resolve the signals. As you decrease the resolution bandwidth, you impro v e resolution of the individual signals and also increased the sweep timed.
3 Making Measurements 30 N9340A User’s Guide Resolving Small Signals Hidden by Large Signals This example uses narro w resolution bandwidths t o resolve two in put signals with a frequency separation of 50 kHz and an amplitude difference of 60 dB. 1 Connect two sour ces to the analyzer input connector as shown in Fig ur e 3 on page 28.
Making Measurements 3 N9340A User’s Guide 31 Measuring a Low -Level Signal This section prov ides information on measuring low- level signals and distinguishing them from spectrum noise. There are four main useful techniques as follo ws to measure a low- level signal.
3 Making Measurements 32 N9340A User’s Guide 5 Reduce the span to 1 MHz and if necessar y re- center t he peak. • Press [SPAN] > [1] > {MHz} . 6 Set the attenua tion to 20 dB. Note that increasing the attenuation moves the noise f loor cl oser to the s ig nal le v el .
Making Measurements 3 N9340A User’s Guide 33 Decreasing the Resolution Bandwidth Resolution bandwidth s ettings affect the level of internal noise wit hout affecting the level of continuous wave (CW) signals. Decreasing the RBW by a decade reduce s the nois e f loor by 10 dB.
3 Making Measurements 34 N9340A User’s Guide Using the Average Detector and Increased Sweep T ime When the analyzer’s noise masks low- level signals, changing to the average detector and increasing the sweep time smoothes the noise and impro v es the signal’s visibility.
Making Measurements 3 N9340A User’s Guide 35 Tr a c e A v e r a g i n g A veraging is a digit al process in which each trace point is av eraged with the previous av erage for the same trace point. Selecting av eraging, when the analyzer is au to coupled, changes the detection mode to sample, smoothing th e display ed noise level.
3 Making Measurements 36 N9340A User’s Guide Improving Frequency Resolution and Accuracy Using the frequency counter t o impro ve frequency resolution and accuracy. 1 Press [PRESET] . (Fact or y Preset) 2 Input a signal (1 GHz, –30 dBm) to th e analyzer’s RF IN connector .
Making Measurements 3 N9340A User’s Guide 37 Making Distortion Measurements This section prov ides information on measuring and identifying signal distor tion . Identifying Analyzer Generated Distortion High level in put signals may cause analyzer distor tion products that could mask the real distor tion measured on t he input signal.
3 Making Measurements 38 N9340A User’s Guide • Press [MARKER] > {Peak Search } . • Press [MARKER] > {Marker T o} > {T o Center} . 4 Change the span to 50 MHz and re- center t he signal: • Press [SP AN] > 50 > {MHz} . • Press [MARKER] > {Peak Search } .
Making Measurements 3 N9340A User’s Guide 39 Figure 14 Identifying Analyzer Distortion (O dB atten) 8 Press [AMPTD] > {Attenuation} > 10 > {dB} to increase the RF attenuation to 10 dB.
3 Making Measurements 40 N9340A User’s Guide Third-Order Intermodulation Distortion T wo- tone, t hird- order int er modulation distor tion is a common test in communication syst ems.
Making Measurements 3 N9340A User’s Guide 41 and the analyzer input. 2 Set one source (signal generator) to 300 MHz and the other source to 301 MHz, for a frequency separation of 1 MHz. Set the sources equal in amplitude as measured by t he analyzer (in this example, they are set t o –5 dBm).
3 Making Measurements 42 N9340A User’s Guide • Press [MARKER] > {Peak S earch} > {Next Left (Right) Pea k} . 9 Measure the difference between this test signal and the second dist ortion product. • Press [Marker] > {Normal} . • Press [MARKER] > {Peak S earch} > {Next Left (Right) Pea k} .
Making Measurements 3 N9340A User’s Guide 43 One-button Power Measurement N9340A pro vides one- button measurement functionality on OBW (Occupied Band Width) , channel po wer and A CPR (Adjacent Channel Po wer Ratio) as an easy- to- use access for your measurement of interest.
3 Making Measurements 44 N9340A User’s Guide Measuring ACPR The adjacent channel power ratio (A CPR) measures the pow er ratio betw een the main channel pow er and the adjac ent channel pow er . Center Frequency Sets the ce nter frequency o f the main c hannel pow er .
Making Measurements 3 N9340A User’s Guide 45 Measuring Channel Power Measures the pow er and po wer spectral density in the channel ban dwidth that you specifi ed. One pair of vertical lines of the displayed green frame indicates the edges of the chan nel bandwidth.
3 Making Measurements 46 N9340A User’s Guide Channel Bandwidth Sets the analyzer span for the channel po w er measurement using the kn ob, the ar ro w ke ys or the numeric ke ypad. Be sure the span is set between 1 and 10 times the int egration ban dwidth.
Making Measurements 3 N9340A User’s Guide 47 Making a Stimulus Response T ransmission Measurement The procedure belo w describes ho w to use a bui lt - in tra ck ing gen er ator to me as ure the r eje ct ion of a low pass filter, a type of transmission measurement.
3 Making Measurements 48 N9340A User’s Guide 5 Press [Sweep ] > {Sweep Time (Auto)} to p ut the sweep time into stimulus response auto coupled mode.
Making Measurements 3 N9340A User’s Guide 49 Measuring Stop Band Attenuation of a Low-pass Filter When measuring f ilter characte ristics, it is useful to look at t he stimulus resp onse ov er a wide frequency range. Setting the analyzer x- axis (frequency) to display logarithmically pro vides this function.
3 Making Measurements 50 N9340A User’s Guide Press [MEAS] > {Normalize} > {Store Ref} (1 → 4) > {Normalize (On) } 8 Reconnect the DUT t o the analyzer . N ote that t he units of the reference lev el ha ve changed to dB, indicating that t his is now a relativ e measurement.
Making Measurements 3 N9340A User’s Guide 51 Making a Reflection Calibration Measurement The follo wing procedure mak es a ref lection measurement using a coupler or directional bridge to measure the retur n loss of a f ilter . This exam ple uses a 370 MHz low- pass f ilter as t he DUT .
3 Making Measurements 52 N9340A User’s Guide 2 Connect the tracking g enerator output of the analyzer to t he directional bridge or coupler. 3 Connect the analyzer input to th e coupled por t of the directional bri dge or coupler . 4 Press [Pres et] to per form a factor y preset.
Making Measurements 3 N9340A User’s Guide 53 Figure 21 Short Circuit Normalized.
3 Making Measurements 54 N9340A User’s Guide Measuring Return Loss Using the Reflection Calibration Routine This procedure uses the ref lection calibration routine in the proceeding procedure “Making a Ref lection Calibrati on Measurement" on page 51 to calculate th e return loss of t he 370 MHz low pass filte r .
55 Agilent N9340A Handheld Spectrum Analyzer Agilent T echnologies 4 System Setting.
4S y s t e m S e t t i n g 56 N9340A User’s Guide Vi sual and Audio Adjustment Quick Display Adjustment The analyzer provides y ou a quick adjustment for both brightness and con trast. Press [SYS] > {Display} to tog gle the sc ree n di spl a y status between Normal an d Light .
System Setting 4 N9340A User’s Guide 57 System Setting Includes general system set tings, displayed language setting, and exter nal input setting. General system setting s Pro vides the following system setting options: Tim e / D at e Press [SYS] > {Setting} > {General} > {Time/Date} to set the d ate an d ti me of the a nal yzer .
4S y s t e m S e t t i n g 58 N9340A User’s Guide Ext Input T oggles th e channel for external input between Ref and Tr i g . Ref ref ers to a 10 MHz ref erence signal; Tr i g refer s to a TTL signal.
System Setting 4 N9340A User’s Guide 59 Quick saving or loading a system set up Quick saving a setup Press [SYS] > {Setting} > {Save Setup} to sav e the current syst em settings. Refer to “File T ype " on page 60 for more in formation abou t file types.
4S y s t e m S e t t i n g 60 N9340A User’s Guide File Pressing [SYS] > {File} acces se s to th e m en u tha t allows y ou to manage t he f ile saving and loading. File T ype Pressing [SYS] > {File} > {File Setup} > {File type} allows you to select a file type from one of the follo wing : • Tra ce (*.
System Setting 4 N9340A User’s Guide 61 Saving a file Refer to the fo llowing three steps to save a file: 1 Press [SYS] > {File} > {File setup} t o select the save path and f ile type. 2 Edit a file name. A file name can be consist of lett ers and digits.
4S y s t e m S e t t i n g 62 N9340A User’s Guide 3 Press [ESC], [Save] to save a trace or a scr een copy to your pre-defined memory . The tra ce or screen will be automatically assigned with a default file name. A trace will be assigned with a file name, such as HY TRACE, HYTRACE_1 , and consecutive deci mal numbers appended.
System Setting 4 N9340A User’s Guide 63 Deleting a file 1 Press [SYS] > {File} > {View} to select a director y. 2 Press [SYS] > {File} > {File setup} > {File type} to select a file t ype. 3 Rotate the knob to highlig ht a file. 4 Press {Delete} to delete a selected file.
4S y s t e m S e t t i n g 64 N9340A User’s Guide Show System Displays the fo llowing hardwar e, software and batter y information of y our anal yzer: Ke y Ac cess: [SYS] > {More (2 of 3)} > {Show system} Machine Model Power Source MCU Firmware Version B attery Info DSP Firmware Version Name FPGA Firmware Version Serial NO.
System Setting 4 N9340A User’s Guide 65 Show Error Accesses a list of the 30 most recent error messages report ed by the analyzer . The most recent error will appear at the bottom of the list. If the error list is longer than 30 entries, the analyzer reports an er ror message [–350, Query overflow] .
4S y s t e m S e t t i n g 66 N9340A User’s Guide Perform a Ti me Base Calibration As soon as t he calibration function triggers, it inte rrupt s the cu rren t m eas ure men t i s in terrup ted and a gauge displays on the LCD.
System Setting 4 N9340A User’s Guide 67 Factory Default Settings Fo r more information about saving a user- def ined preset, refer to “Selecting a preset type ” and “Saving a User - def ined Preset" on page 22. Parameter Default Setting Center Fre quency 1.
4S y s t e m S e t t i n g 68 N9340A User’s Guide.
69 Agilent N9340A Handheld Spectrum Analyzer Agilent T echnologies 5 Key Reference.
5K e y R e f e r e n c e 70 N9340A User’s Guide Amplitude Activates the reference lev el function and access the associat ed softkeys to set functions t hat affect the w a y d ata o n th e v erti cal ax is is d isp la yed or correct ed. Ref level A cti va tes th e re f ere nce le v el fun cti on.
Key Reference 5 N9340A User’s Guide 71 Preamp T oggles the int ernal preamp betw een On and Off . Preamp results in a correction being applied to compensate for the gain of the preamp at 20 dBm so that amplitude readings sho w the value at the input connector .
5K e y R e f e r e n c e 72 N9340A User’s Guide Ref Offset Adds an offset value whic h ranges fr om - 327 .6 dB to +3 27 .6 dB to the d is pla yed r ef erenc e le v el . Reference- level offsets are used when gain or loss occurs between a de vice under test and the analyzer input.
Key Reference 5 N9340A User’s Guide 73 BW/SWP Activates the bandwidt h function and accesses the associated sof tkeys to control resolution bandwidt h, video bandwidth and sweep time. RBW Changes t he 3- dB resolution bandwidth on t he analyzer from 30 Hz to 1 MHz in a 1, 3, 10 sequence using the knob, st ep ke ys or the numeric key p a d.
5K e y R e f e r e n c e 74 N9340A User’s Guide VBW Changes the analyzer post- detect or filt er from 3 Hz to 1 MHz in a 1, 3, 10 sequence using t he knob, the step ke ys, or the numeric ke ypad. As the video bandwidth is decreased, the sweep time is increased to maint ain amplitude calibration.
Key Reference 5 N9340A User’s Guide 75 Log Pwr A verages the dat a as appropriate for the logarithmic scaled y axis. When av erage type is set to Log Pwr , “ LgAv ” appears on the lef t side of the display.
5K e y R e f e r e n c e 76 N9340A User’s Guide Sweep Time Sel ec ts th e le ngth of t ime the a nal yzer tak es to tune across the display ed frequency span (or , in zero span, the time t he analyzer takes to sweep the full screen) using th e knob, the ar ro w ke ys, or numeric keypad.
Key Reference 5 N9340A User’s Guide 77 In FF T Mode In FFT mode, the sweep time is auto- coupled as default. And the submenu of sweep time is invalid in FFT mode. Sweep Activates the sweep mode function and accesses associated sof tkeys to set functions t hat affect the way a trace sweeps acr oss the display.
5K e y R e f e r e n c e 78 N9340A User’s Guide •F a s t Activates the fast sweep mode. Fast sweep mode pro vides a fast measurement function that decreases the sweep time. How ever , t h i s m o d e b r i n g s a d e c r e a se of amplitude accuracy.
Key Reference 5 N9340A User’s Guide 79 Enter • Terminates date entr y and ent ers into t he analyzer a numerica l value key ed from numeric ke ypad on the front panel.
5K e y R e f e r e n c e 80 N9340A User’s Guide ESC/CLR Pro vides mainly tw o types of functions: Clear • Clears an y numeric entr y and cancels t he active function. • Clears any title entry and cause t he title t o re ve rt to the p re vi ou s na me.
Key Reference 5 N9340A User’s Guide 81 Frequency Activates the center frequency function, and accesses the menu of frequen cy functions. The center frequency , or start and stop frequency values appear belo w the grati cule on the display.
5K e y R e f e r e n c e 82 N9340A User’s Guide CF Step Changes the st ep size for the center frequen cy function. Once a step size has been selected and the center frequency function is activated, t he arrow k eys change the center frequency by the step- size value.
Key Reference 5 N9340A User’s Guide 83 Marker Accesses the mark er control softkeys to select the type and number of markers. Markers are diamond- shaped characters that identify points of traces. Up to six pairs of markers may appear on the display simultaneously; only one pair can be controlled at a time.
5K e y R e f e r e n c e 84 N9340A User’s Guide Delta Activates a second marker at the position of t he first marker . (If no m arker is present, tw o markers appear at the cent er of the display). The amplitude and frequency (or time) of the f irst marker is fixed.
Key Reference 5 N9340A User’s Guide 85 Peak Search Place a marker on the highest peak based on t he setting of the Search Criteria as follo ws: •P e a k Place a marker on the highest peak. Key a cc e s s : [MARKER] •N e x t L F P e a k Mo ves th e ma rk er to the next pea k to the le ft of the cur rent marker .
5K e y R e f e r e n c e 86 N9340A User’s Guide Marker T o Accesses the f ollo wing marker function menu k eys: •T o C e n t e r Sets the cent er frequency of the analyzer to t he marker frequency. In Delta m ode, pressing [Marker] > {Marker T o} > {T o Center} sets the center frequency to the m arker delta value.
Key Reference 5 N9340A User’s Guide 87 •N o i s e Activa tes a noise readout mode for evaluating pow e r density. Key a cc e s s : [MARKER] > {More (1 of 2)} > {Mode} Marker T race Activates a mark er on the trace if there are no markers turned on.
5K e y R e f e r e n c e 88 N9340A User’s Guide Meas In spectrum analysis mode, p ressing [Meas] brings up the menu for a suite of po w er measurements such as adjacent channel p ow er , occupied bandwidth, and ch annel pow er .
Key Reference 5 N9340A User’s Guide 89 Span Activates the span fun ction and accesses t he submenu of span functions. Pressing [SPAN] allo ws you to change the frequency range symmetrically about the cent er frequency. The frequency- span readout describes the tot al display ed frequency range.
5K e y R e f e r e n c e 90 N9340A User’s Guide TRACE Accesses the trace k eys to store and manipulate trace information. Each trace comprises a series of data points in which amplitude information is stored. The analyzer updat es th e information for any active trace with each sweep.
Key Reference 5 N9340A User’s Guide 91 Minimum Hold Maintains t he minimum level f or each trace point of the selected trace, an d updates each trace point if a new minimum level is detected in successive sweeps. Key a cc e s s : [TRACE] Vie w Holds and displays the amplitude data of the selected trace.
5K e y R e f e r e n c e 92 N9340A User’s Guide data evaluated during that time and present a single po int of trace dat a based on th e detector mode. W e call the interval during which data for that trace point is being collected, th e “bucket”.
Key Reference 5 N9340A User’s Guide 93 •P o s P e a k Obtains the maximum video sign al between the last display point and the present display point and stores th is value in memor y. It is us ed primarily when measuring sinusoidal (spectral) components.
5K e y R e f e r e n c e 94 N9340A User’s Guide • Any related paramet er (e.g., center freq uency) is changed. Press Average (Off) to tur n off averaging. The number of sweeps can only be set using t he numeric ke ypad, not the knob or arrow k eys.
Key Reference 5 N9340A User’s Guide 95 Limit Limit Line Activates an adjust able ho rizont al line t hat is used as a visual reference line. The line, which can be used f or trace arithmetic, has amplitude values that correspond to its vertical position when compared to the reference lev el.
5K e y R e f e r e n c e 96 N9340A User’s Guide Beep Sounds alarm as an indicator of limit fails. Key a cc e s s : [Limit] Save Pattern Sav es the paramet ers of the cur rent limit patt ern in a file (*. PTN ). Y our are allow ed to enter the f ilename using the numeric ke ypad and using [ENTER] as a terminator.
97 Agilent N9340A Handheld Spectrum Analyzer Agilent T echnologies 6 SCPI Command Reference.
6 SCPI Command Reference 98 N9340A User’s Guide SCPI Language Basics SCPI is an ASCII- based instrument command language designed for test and measurement ins trum en ts, with the go al of re du cin g au tom ati c test equipment (ATE) program development time.
SCPI Command Referenc e 6 N9340A User’s Guide 99 Basic Knowledge Requirement Programming wit h SCPI requires kno wledge of: • C o m p u t e r p r o g r a m m i n g l a n g u a g e s , s u c h a s C o r C++. • The language of your instrument . A N9340A emplo ys SCPI as its programming language.
6 SCPI Command Reference 100 N9340A User’s Guide Standard Notations A command consists of mnem onics (keyw ords), parameters and p unctuati on. Bef ore yo u start to program your anal yzer , familiarize yourself with the st andard notation of each of them.
SCPI Command Referenc e 6 N9340A User’s Guide 101 Separator • A colon “ : ” separ ates k eyw ords of diff erent hiberarchy. • A space separates a keyw ord an d a parameter , as well as a parameter and a unit. Default unit of parameters The analyzer has the follo wing default units f or numeric variables.
6 SCPI Command Reference 102 N9340A User’s Guide Common Commands These commands are specified in IEEE Standard 488.2- 1992, IEEE Standard Codes , Formats, Protocols and Common Co mmands fo r Use with ANSI/IEEE Std 488.1- 1987 . N ew Y ork, NY , 1992.
SCPI Command Referenc e 6 N9340A User’s Guide 103 CALCulate Subsystem This subsystem is u sed to per form post- acquisition data processing. In ef fect, the collection of new data triggers t he CALCulate subsystem. This subsystem is further divided into tw o subsecti ons: limits and markers which are the primar y functions in th is subsystem.
6 SCPI Command Reference 104 N9340A User’s Guide Control Limit line Buzzer :CALCulate:LLINe[1]:BUZZer[:STATe] OFF|ON|0|1 :CALCulate:LLINe[1]:BUZZer[:STATe]? This command togg les the audio warning between on and off. If dat a exceeds the limit line the buzzer will sound an alar m.
SCPI Command Referenc e 6 N9340A User’s Guide 105 Control Limit Pattern T esting :CALCulate:LLINe[1]:PATTern[:STATe] OFF|ON|0|1 :CALCulate:LLINe[1]:PATTern[:STATe]? This command togg les t he usage of limit patt ern between on and off. If the limit p attern is turned on, limit lin e is automatically turned of f.
6 SCPI Command Reference 106 N9340A User’s Guide Define Limit Pat tern V alues :CALCulate:LLINe[1]:DATA <x-axis>,<ampl>{,<x-axis>,<ampl>} :CALCulate:LLINe[1]:DATA? This command defines limit pa ttern va lues, and destro ys all existing dat a.
SCPI Command Referenc e 6 N9340A User’s Guide 107 CALCulate:MARKer Subsection Markers All Off on All T races :CALCulate:MARKer:AOFF This command turns of f all mark ers on all traces. Markers All On :CALCulate:MARKer:ALL This command turns on all the markers and places them on six highest peak s.
6 SCPI Command Reference 108 N9340A User’s Guide Marker Function :CALCulate:MARKer[1]|2|3|4|5|6:FUNCtion FCOunt|NOISe|OFF :CALCulate:MARKer[1]|2|3|4|5|6:FUNCtion? This command selects the marker function f or the designated marker . FCOunt refers to the frequency count er function.
SCPI Command Referenc e 6 N9340A User’s Guide 109 This command places t he selected marker on the next highest signal peak to the right of t he current marked peak.
6 SCPI Command Reference 110 N9340A User’s Guide mode, the center frequency is set to t he marker delta value. This command is not available in zero span. Set reference level to the marker va lue :CALC ulate :MARK er[1]|2|3|4|5|6 [:SET]:RLEV el This command sets t he reference le vel to the specified marker am plitude.
SCPI Command Referenc e 6 N9340A User’s Guide 111 Marker readout: X V alue :CALCulate:MARKer[1]|2|3|4|5|6:X <para> :CALCulate:MARKer[1]|2|3|4|5|6:X? This command positions t he designated marker on its assigned trace at t he specif ied trace X value.
6 SCPI Command Reference 112 N9340A User’s Guide DEMOdulation Subsystem This sub tree commands are used to control the demodulation aft er the measure has been loaded by [:SENSe]:FREQuency:SPAN:ZERO AM Demodulation :DEMod:AM:STATe OFF|ON|0|1 :DEMod:AM:STATe? This command togg les AM demodulation function between on and off.
SCPI Command Referenc e 6 N9340A User’s Guide 113 DISPlay Subsystem The DISPlay subsystem controls the selection and presentation of tex tual, graphical, and trace information. Within a display , informat ion may be sep ar ated in to in di vid ua l wi ndo ws.
6 SCPI Command Reference 114 N9340A User’s Guide Tr a c e Y- A x i s R e f e r e n c e L e v e l :DISPlay:WINDow:TRACe:Y[:SCALe]:RLEVel <ampl> :DISPlay:WINDow:TRACe:Y[:SCALe]:RLEVel? This command sets t he amplitude value of the reference le vel f or the y- axis.
SCPI Command Referenc e 6 N9340A User’s Guide 115 V ertical Axis Scal ing :DISPlay:WINDow:TRACe:Y[:SCALe]:SPACing LINear|LOGarithmic :DISPlay:WINDow:TRACe:Y[:SCALe]:SPACing? T oggles t he vertical graticule divisions b etween logarithmic or linear units.
6 SCPI Command Reference 116 N9340A User’s Guide Contrast :DISPlay:MODE:CONTrast<integer> :DISPlay:MODE:CONTrast? This command adjusts t he contrast of the cur rent screen display. . Brightness :DISPlay:MODE:BRIGhtness <integer> :DISPlay:MODE:BRIGhtness? This command adjusts the bright ness of the cur rent screen display.
SCPI Command Referenc e 6 N9340A User’s Guide 117 INITiate Subsystem The INI Tia te su bsy stem is u se d to co nt ro l the initiation of the trigger. Ref er to the TRIGger subsystem for related commands. Continuous or Sin gle Sweep :INITiate:CONTinuous OFF|ON|0|1 :INITiate:CONTinuous? T oggles t he continuous sweep between on and off.
6 SCPI Command Reference 118 N9340A User’s Guide INST rument Subsystem This subsystem includes comm ands for queryi ng and selecting instr ument measurement mo de.
SCPI Command Referenc e 6 N9340A User’s Guide 119 MEASure Subsystem Pro vides programming information for the keys associated wit h the measurements available when you press the front- panel Measure ke y.
6 SCPI Command Reference 120 N9340A User’s Guide Specifies t he range of integratio n used in calculating the power in the main channel. Use the knob and the ar row k eys t o set the bandwidt h.
SCPI Command Referenc e 6 N9340A User’s Guide 121 Low Adjacent Channel Power Ratio Return th e low er adjacent channel pow er to main channel po wer ra tio. :MEASure:ACPR:LRATio? Upper Adjacent Channel Power Ratio Return th e upper adjacent channel pow er to main channel po wer ra tio.
6 SCPI Command Reference 122 N9340A User’s Guide Channel Power Subsection Center Freq :MEASure:CHPower:CENTer <freq> :MEASure:CHPower:CENTer? Sets the cent er frequency of the disp lay.
SCPI Command Referenc e 6 N9340A User’s Guide 123 SENSe Subsystem Sets the ins trumen t paramet ers for the input signal measurements. [:SENSe]:A VERage Subsection Average T ype [:SENSe]:AVERage:TYP.
6 SCPI Command Reference 124 N9340A User’s Guide T urn Avera ging On/Off [:SENSe]:AVERage:TRACe 1|2|3|4|5|6[:STA Te] OFF|ON|0|1 [:SENSe]:AVERage:TRACe 1|2|3|4|5|6[:STATe]? This command togg les av eraging between off and on. A veraging combines t he value of successive measurements to aver age out measurement variations.
SCPI Command Referenc e 6 N9340A User’s Guide 125 [:SENSe]:BANDwidth Subsect ion Resolution Bandwidth [:SENSe]:BANDwidth|BWIDth[:RESolution] <freq> [:SENSe]:BANDwidth|BWIDth[:RESolution] ? This command specifies t he resolution bandwidth.
6 SCPI Command Reference 126 N9340A User’s Guide Video Bandwidth Automatic [:SENSe]:BANDwidth|BWIDth:VIDeo:AUTO OFF|ON|0|1 [:SENSe]:BANDwidth|BWIDth:VIDeo:AUTO? This command couples the video bandwidth to t he resolution bandwidth.
SCPI Command Referenc e 6 N9340A User’s Guide 127 [:SENSe]:DET ector Subsection Automatic Detection T ype Selected [:SENSe]:DETector:TRACe[1]|2|3|4 AUTO OFF|ON|0|1 [:SENSe]:DETector:TRACe[1]|2|3|4 AUTO? Thi s c omm and swi tche s au tom ati cal ly to th e optimum detection type for typical measurements using the cur rent instr ument settings.
6 SCPI Command Reference 128 N9340A User’s Guide T ypes of Dtection [:SENSe]:DETector:TRACe[1]|2|3|4 [FUNCtion] AVERage|POSitive|SAMPle| NEGative|NORMal [:SENSe]:DETector:TRACe[1]|2|3|4 [FUNCtion]? This command specifies t he detection mode.
SCPI Command Referenc e 6 N9340A User’s Guide 129 This command specif ies whether the st ep size is set automatically based on the span. Center Frequency Step Size [:SENSe]:FREQuency:CENTer:STEP[:INCReme nt] <freq> [:SENSe]:FREQuency:CENTer:STEP[:INCReme nt]? This command specif ies t he center frequency st ep size.
6 SCPI Command Reference 130 N9340A User’s Guide Zero Frequency Span [:SENSe]:FREQuency:SPAN:ZERO This comm and sets the f requenc y span to zer o. Last Frequency Span [:SENSe]:FREQuency:SPAN:PREVious This command sets t he frequency span to the previous span setting.
SCPI Command Referenc e 6 N9340A User’s Guide 131 [:SENSe]:POW er Subsection Input Attenuat ion [:SENSe]:POWer[:RF]:ATTenuation <para> [:SENSe]:POWer[:RF]:ATTenuation? This comma nd sets the valu e of the attenuator .
6 SCPI Command Reference 132 N9340A User’s Guide SWEep Subsection Sweep Time [:SENSe]:SWEep:TIME <time> [:SENSe]:SWEep:TIME? This command specifies t he time in which the instrument sweeps the display.
SCPI Command Referenc e 6 N9340A User’s Guide 133 SYST em Subsyste m This subsystem is used to set the controls and parameters associated wit h the overall system settings.
6 SCPI Command Reference 134 N9340A User’s Guide TRACe Subsystem The TRA Ce s ubs ys tem c on tr ols ac ce ss to the internal trace memor y of t he analyzer .
SCPI Command Referenc e 6 N9340A User’s Guide 135 T racking Generator Subsystem The tr ack ing ge ner ato r su bs yste m c ont ro ls the use tracking generator function of the an alyzer . State :TGENerator:AMPLitude:STATe OFF|ON|0|1 :TGENerator:AMPLitude:STATe? Thi s c omm and tog gles the state of tra cki ng generator between on and off.
6 SCPI Command Reference 136 N9340A User’s Guide Amplitude Step :TGENerator:AMPLitude:STEP <ampt> :TGENerator:AMPLitude:STEP? This command sets t he amplitude step size of t he tracking generator output. This command is valid aft er tracking genera tor is enabled.
SCPI Command Referenc e 6 N9340A User’s Guide 137 Storing as reference :TGENerator:NORMalize:REF This command stores the cur rent trace to T race 4 as a reference.
6 SCPI Command Reference 138 N9340A User’s Guide Normalization Reference Position :TGENerator:NORMalize:POSN <para> :TGENerator:NORMalize:POSN? This command sets t he nor malization reference position.
SCPI Command Referenc e 6 N9340A User’s Guide 139 TRIGer Subsystem Trigger subsyst em is only valid when t he analyzer is in zero span. External T rigger Slope :TRIGer[:SEQuence]:EXTernal:SLOPe POSitive|NEGative :TRIGer[:SEQuence]:EXTernal:SLOPe? The extern al trigger signal must be a TTL signal at 0 V to 5 V .
6 SCPI Command Reference 140 N9340A User’s Guide Video T rigger Level Amplitude :TRIGer[:SEQuence]:VIDeo:LEVel <ampl> :TRIGer[:SEQuence]:VIDeo:LEVe? This command specif ies t he video trigger level.
SCPI Command Referenc e 6 N9340A User’s Guide 141 UNIT Subsystem Selects a pow er unit f or measurement. :UNIT:POWer DBM|DBMV|DBUV|V|W :UNIT:POWer? This command specif ies amplitude units for the input, output and displa y.
6 SCPI Command Reference 142 N9340A User’s Guide.
143 Agilent N9340A Handheld Spectrum Analyzer Agilent T echnologies 7 Error Messages.
7 Error Messages 144 N9340A User’s Guide Error Message List NOTE A symbol [F] at th e beginning of an error message indicates this is an error caused by manual front panel operation. A sym bol [R] at th e beginning of an error message indicates t his is an error caused by re mo te co nt rol m od e.
Error Messages 7 N9340A User’s Guide 145 –220 No matched module Indicates no mat ched measurem ent or mode found . –200 Execution error This is a generi c execution error for devices that cannot detect more specific errors. The code indicates on those execution errors def ined in IEEE 4 88.
7 Error Messages 146 N9340A User’s Guide 162 Cannot open fast sweep in this case Indicates current settings do not allow you to open fast sweep. For example, currently in FFT , zero span, or any measurement in power suite does not allow fast sweep. 156 Incorrect alignment file on flash Indicates a n invalid alignment f ile.
Error Messages 7 N9340A User’s Guide 147 130 Meas uncal Indicates the measurement is uncalibrated due to fast sweeping through a narrow RBW filter . Check the sweep time, span, and bandwidth settings, or use auto coupling. 119 RF Board Changed Indicates the RF board was changed, the analyzer needs re-load the alignment data.
7 Error Messages 148 N9340A User’s Guide.
149 Agilent N9340A Handheld Spectrum Analyzer Agilent T echnologies 8 Menu Map ..
8M e n u M a p 150 N9340A User’s Guide AMPTD Amplit ude Ref level Attenuation Auto Man Preamp Off O n Scale/DIV Scale T ype Log L i n Ref Offset Y Axis Unit dBm 1 dB/DIV 2 dB/DIV 5 dB/DIV 10 dB/DIV .
BW/SWP RBW VBW VBW/RBW Avg T ype Sweep Time Auto M a n Sweep Single Sweep Auto Log Pwr Power Vol t a g e Return Auto Man Auto Man Auto M a n Return Sweep Single C o n t Sweep Mode Normal Fast Menu Map.
Freq Center Freq CF Step Auto M a n Start Fr eq Stop Freq 8M e n u M a p 152 N9340A User’s Guide FREQ.
Marker Marker Normal Delta Off Peak Search Marker T o More Peak Auto Search 1 2 3 4 5 6 Next Left PK Next Right PK 1 of 2 To C e n t e r To R e f Return Mode All Off Marker T race Normal Freq Cou nt N.
MEAS Measure Off Spectrum Mask OBW ACPR Channel Power Method % dBc Center Freq Int BW Channel BW Return Center Freq Adj Channel Channe l Space Main Channel Return Percent dBc Return Page Up Page Down .
SP AN Sp an Full Span Zero Span Last Span Demod Tr i g g e r The two menus enable when zero span AM Off O n FM Off O n Speaker Vol Free Run Vid eo Ext Rise Ext Fall Return Menu Map 8 N9340A User’s G.
8M e n u M a p 156 N9340A User’s Guide SYS System Display Brightness Contrast Settin g Screen Save File General Ext Input Tr i g Ref Language Save Setup Return Normal Light More 1 of 3 Key Beep Show.
Tr a c e Tr a c e Clear Write Max Hold Min Hold View Blank More 1 2 3 4 1 of 2 Detector Save T race Ave r ag e Auto Normal Ave r ag e Pos Peak More 2 of 2 Auto Man Off On Save As Recall T race Sample .
Limit T ype Beep Save Pattern Upper Lower Limit Limit Line Limit Pattern Recall Pattern Off O n Off O n Off On Point 1 Point 2 Point 3 Point 4 X Axis U nit Return Set Pattern Freq T i m e Page Up Page.
159 A Adding Option, 23 Amplitude, 70 Attenuation, 70 Avg Type, 74 B Battery, 7 C CF Step, 82 Checking SYS Info, 19 D Display Adjust ment, 56 E ESC/CLR, 80 Ext Input, 58 F File Type, 61 Firmware Upgra.
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www .agilent.com © Agilent T echnologies, Inc. 2007 Printed in Chi na April 2007 *N9340-90001* N9340-9 0001.
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Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Agilent Technologies N9340A è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Agilent Technologies N9340A - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Agilent Technologies N9340A imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Agilent Technologies N9340A ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Agilent Technologies N9340A, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Agilent Technologies N9340A.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Agilent Technologies N9340A. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Agilent Technologies N9340A insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
