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Making Measurements



Making Distortion Measurements

Third-Order Intermodulation Distortion

Two-tone, third-order intermodulation (TOI) distortion is

a common test in communication systems. When two

signals are present in a non-linear system, they may

interact and create third-order intermodulation

distortion products that are located close to the original

signals. System components such as amplifiers and

mixers generate these distortion products.
In this example we test a device for third-order

intermodulation using markers. Two sources are used,

one set to 300 MHz and the other to 301 MHz.
1 Connect the equipment as shown in figure below.

This combination of signal generators and directional

coupler (used as a combiner) results in a two-tone

source with very low intermodulation distortion.
Although the distortion from this setup may be better

than the specified performance of the analyzer, it is

useful for determining the TOI performance of the

source/analyzer combination.

Frequency

Enter

MOD

On/ Off

Amplitude

Utility

LF Out

Preset

Local

I/ Q

File

Trigger

Pulse

Sw eep

Remote

Standby
On

N9310A RF Signal Generator 9 kHz - 3.0 GHz

REVERSE PWR
4W MAX 30 VDC

LF OUT

RF OUT 50

FUNCTIONS

Frequency

Enter

MOD

On/ Off

Amplitude

Utility

LF Out

Preset

Local

I/ Q

File

Trigger

Pulse

Sw eep

Remote

Standby
On

N9310A RF Signal Generator 9 kHz - 3.0 GHz

REVERSE PW R
4W MA X 30VDC

LF OUT

RF OUT 50

FUNCTIONS

Signal generator

Directional

coupler

Содержание N9340B

Страница 1: ...nalyzer User s Guide Notice This document contains references to Agilent Please note that Agilent s Test and Measurement business has become Keysight Technologies 99 Washington Street Melrose MA 02176 800 517 8431 TestEquipmentDepot com ...

Страница 2: ...ysight provides the Software to U S government customers under its standard commercial license which is embodied in its End User License Agreement EULA The license set forth in the EULA represents the exclusive authority by which the U S government may use modify distribute or disclose the Software The EULA and the license set forth therein does not require or permit among other things that Keysig...

Страница 3: ...s 16 Powering on the Analyzer for the First Time 18 Preparation for Use 19 Making a Basic Measurement 21 3 System and File System Setting 24 Power On and Preset Settings 24 Factory Default Settings 25 Visual and Audio Adjustment 26 General system settings 26 Switch Timer 27 IP configuration 27 Upgrading Firmware 28 Ext Input 28 Adding an Option 29 Show System 30 Show Error 30 Perform a Time Base C...

Страница 4: ...Low pass Filter 57 Making a Reflection Calibration Measurement 59 Measuring Return Loss Using the Reflection Calibration Routine 62 Making an Average Power Measurement 63 Spectrogram 68 Demodulating an FM Signal 71 Analysis the Demodulated Signals 73 ASK FSK Demodulation Analysis 76 Monitoring the ADSL Signal with Option XDM 79 5 Key Reference Amplitude 82 BW SWP 86 Enter 92 ESC CLR 92 Frequency 9...

Страница 5: ...6 Error Messages Overview 140 Error Message List 141 7 Troubleshooting Check the basics 146 Warranty and Service Options 147 Contact Keysight Technologies 148 8 Menu Map ...

Страница 6: ...tkey for example Start refers to the Start softkey 2 A pair of square brackets indicates a hardkey for example ENTER refers to the ENTER hardkey 3 Analyzer refers to Keysight N9340B handheld spectrum analyzer in the following chapters 4 DUT refers to a device under test ...

Страница 7: ...1 Overview 1 Overview ...

Страница 8: ...including Power Measurement Provides power measurement functionality on OBW Occupied Bandwidth channel power ACPR Adjacent Channel Power Ratio Spectrogram Provides the capability to analyze the stability of a signal over time With option INM the N9340B can monitor the signal capturing performance or intermit tent events unatteded over extended periods of time Spectrum Emission Mask Provides a Pass...

Страница 9: ...ion provides AM FM and ASK FSK demodulation analysis function AM FM Option AMA ASK FSK Option DMA Tracking Generator Option TG3 Provides an RF source for scalar network analysis High sensitivity measurement Option PA3 Includes a 3 GHz pre amplifier enabling highly sensi tivity measurements useful in the analysis of low level signals ...

Страница 10: ... comfortable and firm hold and ruggedness SCPI remote control via USB and LAN port The PC software in the N9340B Helpkit CD is convenient for your further editing and data analysis 4 hour time battery provides continuous work time in the field test The light sensor adjusts the display brightness according to the environment to save power The headphone jack on the top panel is for the audio signal ...

Страница 11: ...and MODE 3 Preset Returns the analyzer to a known state also turns on off power save feature press for 1 sec 4 Enter Confirms a parameter selection or configuration 5 MARKER Activates the marker function 6 ESC CLR Exits and closes the dialog box or clears the character input 7 LIMIT Sets limit lines for quick Pass Fail judgement 8 Save Quick saves the current screen trace 9 Arrow keys Increases or...

Страница 12: ...tor Mode TRACE More Detector 5 Center Frequency FREQ Center Freq 6 Resolution Bandwidth BW SWP RBW 7 Display Status Line Displays status and error messages 8 Video Bandwidth BW SWP VBW 9 Frequency Span SPAN 10 Sweep Time BW SWP Sweep Time 11 Key Menu See key label description in the key reference for more information 12 Key Menu Title Refers to the current activated function 13 Marker Amplitude Ma...

Страница 13: ... when external DC power is connected to the tester 4 USB interface Device Connects to a PC 5 USB interface Host Connects to a USB memory stick or disk 6 Headphone Connects to a headphone 7 LAN Interface Connects to a PC for SCPI remote control 8 RF OUT Connector The output for the built in tracking generator Enabled with Option TG3 9 EXT TRIG IN REF IN BNC Female Connects to an external TTL signal...

Страница 14: ...The instruction manual symbol indicates that the user must refer to specific instructions in the manual The standby symbol is used to mark a position of the instrument power switch Indicates the time period during which no hazardous or toxic substance elements are expected to leak or deteriorate during normal use Forty years is the expected useful life of the product Korea Certification indicates ...

Страница 15: ... 2 Getting Started Information on checking the analyzer when received preparation for use basic instrument use familiarity with controls defining preset conditions updating firmware and contacting Keysight Technologies ...

Страница 16: ...shipment Inspect the shipping container for damages Signs of damage may include a dented or torn shipping container or cushioning material that indicate signs of unusual stress or compacting Carefully remove the contents from the shipping container and verify if the standard accessories and your ordered options are included in the shipment ...

Страница 17: ...er Various AC power cables are available from Keysight that are unique to specific geographic areas You can order additional AC power cords are correct for use in different areas The AC Power Cords table provides a lists of the available AC power cords the plug configurations and identifies the geographic area in which each cable is typically used The detachable power cord is the product disconnec...

Страница 18: ... 83 C4 Option 902 Continental Europe Korea Indonesia Italy Russia 125V 8120 1521 CNS 10917 2 NEMA 5 15P Option 903 Unite States Canada Taiwan Mexico 250V 8120 2296 SEV 1011 Option 906 Switzerland 230V 8120 4600 SABS 164 1 Option 917 South Africa India 8120 4754 JIS C8303 Option 918 Japan 250V 8120 5181 SI 32 Option 919 Israel 8120 8377 GB 1002 Option 922 China Getting Started AC Power Cords 12 AC ...

Страница 19: ...age sources while it is being opened WARNING This product is a Safety Class I analyzer The main plug should be inserted in a power socket outlet only if provided with a protective earth contact Any interruption of the protective conductor inside or outside of the product is likely to make the product dangerous Intentional interruption is prohibited WARNING Electrical shock may result when cleaning...

Страница 20: ...C Never use a damaged or worn out adapter or battery Charging the batteries internally even while the analyzer is powered off the analyzer may keep warm To avoid overheating always disconnect the analyzer from the AC adapter before storing the analyzer into the soft carrying case CAU CAUTION Connect the automotive adapter to the power output connector for IT equipment when charging the battery on ...

Страница 21: ...ause most of the semiconductor devices used in this analyzer are susceptible to damage by static discharge Depending on the magnitude of the charge device substrates can be punctured of destroyed by contact or proximity of a static charge The result can cause degradation of device performance early failure or immediate destruction These charges are generated in numerous ways such as simple contact...

Страница 22: ... of the battery the number of lighted green LED indicates the percentage of the battery power Press SYS More Show System Page down to check the current battery information CAU CAUTION Full charge the battery before first using the analyzer Step Notes 1 Open the battery cover Use a phillips type screwdriver loosen the retaining screw then pull the battery cover open 2 Insert the battery Observe cor...

Страница 23: ...hen the battery is fully charged the green charging indicator turns off During charging and discharging the battery voltage current and temperature are monitored If any of the monitored conditions exceed their safety limits the battery will terminate any further charging or discharging until the error condition is corrected The charging time for a fully depleted battery is approximately four hours...

Страница 24: ...power on the analyzer Allow the analyzer to warm up for 30 minutes before making a calibrated measurement To meet its specifications the analyzer must meet operating temperature conditions CAU CAUTION Use only the original AC DC adapter or originally supplied battery for the power source The maximum RF input level of an average continuous power is 33 dBm or 50 VDC signal input Avoid connecting a s...

Страница 25: ...e are 11 languages for your selection 3 Press SYS Brightness and then rotate the knob to adjust display brightness 4 Press SYS Key Beep to toggle the buzzer beep function between on and off Checking Instrument Information 1 Press SYS More Show System to display the system information 2 Press SYS More Option to display the option information 3 Press SYS More Show Error to display the error informat...

Страница 26: ...g Started South Korea Class A EMC Declaration 20 South Korea Class A EMC Declaration This equipment is Class A suitable for professional use and is for use in electromagnetic environments outside of the home ...

Страница 27: ...7 Entering Data When setting measurement parameters there are several ways to enter or modify active function values 1 Using the Front Panel Knob Increases or decreases the current value 2 Using the Arrow Keys Increases or decreases the current value by the step unit defined Press FREQ CF Step to set the frequency by an auto coupled step Step Span 10 when CF Step mode is set to Auto 3 Using the Nu...

Страница 28: ... s RF OUT connector to analyzer s RF IN connector 5 Press FREQ 1 GHz to set the analyzer center frequency to 1 GHz 6 Press SPAN 5 MHz to set the analyzer frequency span to 5 MHz 7 Press MARKER Peak Search to place a marker M1 at the highest peak 1 GHz on the display The Marker amplitude and frequency values appear in the function block and in the upper right corner of the screen Use the front pane...

Страница 29: ...ystem and File 3 System and File This chapter provides the information on basic system setting and file operation Such as display option activation calibration firmware upgrade and test data saving loading ...

Страница 30: ... be found Factory Default Settings on page 11 User Restores the analyzer to a user defined setting Refer to the descriptions as below Last Restores the analyzer to the last time setting Saving a User defined Preset If you frequently use system settings that are not the factory defaults refer to the following steps to create a user defined system settings that can be easily recalled at the power up...

Страница 31: ...IV 10 dB DIV Scale Type Log RBW Auto 1 MHz VBW Auto 1 MHz Average Type Log Power Sweep time Auto Sweep Mode Normal Trace 1 Clear write Trace 2 Blank Trace 3 Blank Trace 4 Blank Trace 1 Detection Pos Peak Trace 2 Detection Pos Peak Trace 3 Detection Pos Peak Trace 4 Detection Pos Peak Trace Average All Off Marker All Off File Type Trace Save Path Local Mode Spectrum Analyzer External Input type Tri...

Страница 32: ...ight Auto and Man You can select the backlight brightness and the auto off idle time in manual mode Setting Key Beep Press SYS Key Beep to activate the key beep function as an indicator of key operation General system settings Provides the following system setting options Time Date Press SYS Setting General Time Date to set the date and time of the analyzer You need to input the time in a HHMMSS f...

Страница 33: ...ch Timer Pressing SYS Switch Timer Timer sets the time switch to power on off the N9340B in a user defined time and date This switch timer function requires the power supply connected or charged battery installed Press Repeat Mode Everyday to set the N9340B boot up off in the pre saved time everyday The pre saved date is invalid in this mode IP configuration The N9340B supports LAN port connection...

Страница 34: ...automatically 5 Unplug the USB stick and restart the N9340B when message All modules have been upgraded please restart is displayed 6 Press SYS More Show System to find the updated MCU firmware version Ext Input Toggles the channel for external input between Ref and Trig Ref refers to a 10 MHz reference signal Trig refers to a TTL signal NOTE Please make sure your USB stick is in FAT16 or FAT32 fo...

Страница 35: ...PAN Zero Span to activate the Trigger function 3 Access the associated softkeys to select the rising edge Ext Rise or the falling edge Ext Fall as the trigger threshold Adding an Option Pressing SYS More Option Add Option brings up a dialog box for entering the option license code Use the numeric keypad to input the option license code and then use the ENTER key as a terminator If the analyzer rec...

Страница 36: ... list informs the user that error exceed 30 For more information refer to Error Messages on page 139 Perform a Time Base Calibration The N9340B provides a manual calibration function to calibrate the time base The analyzer should warm up for approximately 30 minutes before calibration When the calibration function is triggered the current measurement is interrupted and a gauge displays on the LCD ...

Страница 37: ...ow Frequency Channel Press SYS More More LowFreqChannel to enable the low frequency channel function When this softkey is enabled the trace in the low frequency range will has a better DANL This softkey is only available in spectrum analysis mode with option XDM or option IBC NOTE Time base calibration takes during a short time only when the inner temperature is stable When the inner temperature i...

Страница 38: ... Each file type has a specific purpose as defined below Pressing SYS File File Setup File type allows the user to select a file type from one of the following Trace DAT A trace file records trace data and controls Screen JPG A screen file records graphic information of the current screen State STA A state file records the current controls and settings of the analyzer Use this file type for saving ...

Страница 39: ...e Saving a file Refer to the following three steps to save a file 1 Press SYS File File Setup to select the save path and file type 2 Edit a file name A file name can consist of letters and digits A single key stroke on the numerical keypad inputs a digital number and consecutive key stroke selects and inputs a letter 3 Press Save to save the file When a file saving completes the message File Save...

Страница 40: ...h to either local memory or an external USB device 3 Press Return Save to save a trace or a screen copy to the pre defined memory The trace or screen will be automatically assigned with a default file name A trace will be assigned with a file name such as HYTRACE HYTRACE_1 and consecutive decimal numbers appended to the alphabetic file name such as HYSCREEN HYSCREEN_1 and consecutive decimal numbe...

Страница 41: ... to highlight a file 4 Press Delete to delete a selected file The file will be deleted once user presses Yes to confirm deleting Loading a file 1 Press SYS File View to select a directory 2 Press File Setup File type to select a file type 3 Rotate the knob to highlight a file 4 Press Load Now to recall the saved file NOTE All the quick saving utility of system state is equal to the saving utility ...

Страница 42: ...System and File File 36 ...

Страница 43: ...37 Making Measurements 4 Making Measurements ...

Страница 44: ...emonstrated in this example 1 Press PRESET to set the analyzer to a factory default setting 2 Input a signal 0 dB 50 MHz to the RF IN connector of the analyzer 3 Set the analyzer start frequency stop frequency and reference level to view the 50 MHz signal and its harmonics up to 100 MHz Press FREQ 40 MHz Press FREQ 110 MHz Press AMPTD 0 dBm 4 Press MARKER Peak search to place a marker on the highe...

Страница 45: ...f the 50 MHz signal Press MARKER Peak Search Next Right PK or Next Left PK Figure 4 1 Delta pair marker with signals same screen NOTE To increase the resolution of the marker readings turn on the frequency count function For more information please refer to Improving Frequency Resolution and Accuracy on page 34 ...

Страница 46: ...e M Sw eep 8 5 Remot e Standby On N9310A RF Signal Generator 9 kHz 3 0 GHz REVERSE PW R 4W MAX 30VDC LF OUT RF OUT 50 FUNCTIONS Frequency Enter 7 M OD On Off RF 4 1 0 2 9 6 3 On Off Amplitude FM Ut ility LF Out Preset Local AM I Q File Trigger Pulse M Sw eep 8 5 Remote Standby On N9310A RF Signal Generator 9 kHz 3 0 GHz REVERSE PWR 4W MAX 30VDC LF OUT RF OUT 50 FUN CTIONS Directional coupler Signa...

Страница 47: ...ou improve the resolution of the individual signals and it also increases the sweep timing For fastest measurement times use the widest possible resolution bandwidth Under factory preset conditions the resolution bandwidth is coupled to the span Figure 4 3 Resolving signals of equal amplitude ...

Страница 48: ...tor as shown in Figure 4 3 on page 26 2 Set one source to 300 MHz at 10 dBm Set the other source to 300 05 MHz at 70 dBm 3 Set the analyzer as follows Press PRESET Press FREQ 300 05 MHz Press SPAN 500 kHz Press BW SWP 300 Hz 4 Reduce the resolution bandwidth filter to view the smaller hidden signal Place a delta marker on the smaller signal Press MARKER Peak Search Press MARKER Delta Press MARKER ...

Страница 49: ...ated noise in the spectrum analyzer The input attenuator affects the level of a signal passing through the analyzer If a signal is very close to the noise floor reducing input attenuation will bring the signal out of the noise 1 Preset the analyzer 2 Input a signal 1 GHz 80 dBm to RF IN 3 Set the CF span and reference level Press FREQ 1 GHz Press SPAN 5 MHz Press AMPTD 40 dBm 4 Move the desired pe...

Страница 50: ... MHz 6 Set the attenuation to 20 dB Note that increasing the attenuation moves the noise floor closer to the signal level Press AMPTD Attenuation 20 dB Figure 4 6 A signal closer to the noise level Atten 20 dB 7 Press AMPTD Attenuation 0 dB to set the attenuation to 0 dB Figure 4 7 A signal closer to the noise level Atten 0 dB ...

Страница 51: ...ing the RBW by a decade reduces the noise floor by 10 dB 1 Refer to Reducing Input Attenuation on page 29 and follow steps 1 2 and 3 2 Decrease the resolution bandwidth Press BW SWP and toggle RBW setting to Man manual then decrease the resolution bandwidth using the knob the arrow keys or the numeric keypad The low level signal appears more clearly because the noise level is reduced Figure 4 8 De...

Страница 52: ... visibility Slower sweep times are necessary to average noise variations 1 Refer to Reducing Input Attenuation on page 29 and follow steps 1 2 and 3 2 Press TRACE More Detector Average to select the average detector 3 Press BW SWP Sweep Time to set the sweep time to 500 ms Note how the noise appears to smooth out The analyzer has more time to average the values for each of the displayed data point...

Страница 53: ...ection mode to sample smoothing the displayed noise level 1 Refer to the first procedure Reducing Input Attenuation on page 29 and follow steps 1 2 and 3 2 Press TRACE Average On to turn average on 3 Press 50 ENTER to set the average number to 50 As the averaging routine smoothes the trace low level signals become more visible Figure 4 10 Trace averaging NOTE This is a trace processing function an...

Страница 54: ...tor 3 Set the center frequency to 1 GHz and the span to 5 MHz 4 Press MARKER More Mode Freq Count to turn the frequency counter on 5 Move the marker by rotating the knob to a point half way down the skirt of the signal response 6 Press MARKER More Mode Normal to turn off the marker counter Figure 4 11 Using the frequency counter NOTE Marker count properly functions only on CW signals or dis crete ...

Страница 55: ... and the RF attenuator to determine which signals if any may be internally generated distortion products In this example a signal from a signal generator is used to determine whether the harmonic distortion products are generated by the analyzer 1 Input a signal 200 MHz 10 dBm to the analyzer RF IN connector 2 Set the analyzer center frequency and span Press PRESET factory preset Press FREQ 400 MH...

Страница 56: ...To Ref 6 To determine whether the harmonic distortion products are generated by the analyzer first save the trace data in trace 2 as follows Press TRACE Trace 2 Press TRACE Clear Write 7 Allow trace 2 to update minimum two sweeps then store the data from trace 2 and place a delta marker on the harmonic of trace 2 Press TRACE View Press MARKER Peak Search Press MARKER Delta The Figure 4 14 shows th...

Страница 57: ...dB atten The marker readout comes from two sources Increased input attenuation causes poorer signal to noise ratio This causes the marker delta value to be positive Reduced contribution of the analyzer circuits to the harmonic measurement causes the marker to be negative A large marker delta value readout indicates significant measurement errors Set the input attenuator at a level to minimize the ...

Страница 58: ...f signal generators and directional coupler used as a combiner results in a two tone source with very low intermodulation distortion Although the distortion from this setup may be better than the specified performance of the analyzer it is useful for determining the TOI performance of the source analyzer combination Frequency Enter 7 MOD On Off RF 4 1 0 2 9 6 3 On Off Amplitude FM Utility LF Out P...

Страница 59: ...ncy and span Press PRESET Factory preset Press FREQ 300 5 MHz Press SPAN 5 MHz 4 Reduce the RBW until the distortion products are visible Press BW SWP RBW and reduce the RBW using the knob the arrow keys or the numeric key pad 5 Move the signal to the reference level Press MARKER Peak Search Press MARKER Marker To To Ref 6 Reduce the RBW until the distortion products are visible Press BW SWP RBW a...

Страница 60: ...Right PK 8 Measure the other distortion product Press MARKER Normal Press MARKER Peak Search Next Left Right Peak 9 Measure the difference between this test signal and the second distortion product Press MARKER Normal Press MARKER Peak Search Next Left Right Peak Figure 4 15 TOI test screen ...

Страница 61: ...n Measurement Test Setup N9340A HANDHELD SPECTRUM ANALYZER 100kHz 3 0GHz PRESET ENTER FREQ SPAN AMPTD BW SWP SYS MODE MEAS TRACE ESC CLR 2DEF 3 GHI 1ABC 5M NO 4JKL 6PQR 8VWX 7STU 9YZ_ 0SAVE LIM IT M ARKER DUT 2 Press Preset to perform a factory preset 3 Set the start and stop frequencies and resolution bandwidth Press FREQ Start Freq 100 MHz Press FREQ Stop Freq 1 GHz Press BW SWP RBW 1 MHz 4 Turn...

Страница 62: ...nnect the cable from the tracking generator output to the analyzer input Store the frequency response in trace 4 and normalize Press MEAS Normalize Store Ref 1 4 Normalize On 8 Reconnect the DUT to the analyzer and change the normalized reference position Press MEAS Normalize Norm Ref Posn 8 ENTER 9 Measure the rejection of the low pass filter Press Marker Normal 370 MHz Delta 130 MHz The marker r...

Страница 63: ...the start and stop frequencies Press FREQ Start Freq 100 MHz Press FREQ Stop Freq 1 GHz Press AMPTD Scale Type Log 4 Press BW SWP 10 kHz to set the resolution bandwidth to 10 kHz 5 Turn on the tracking generator and if necessary set the output power to 10 dBm Press MODE Track Generator Amplitude On 10 dBm 6 Press BW SWP Sweep Time Auto to put the sweep time into stimulus response auto coupled mode...

Страница 64: ...lace the reference marker at the specified cutoff frequency Press MARKER Normal 370 MHz 11Set the 2nd marker as a delta frequency of 37 MHz Press Delta 37 MHz 12In this example the attenuation over this frequency range is 19 16 dB octave one octave above the cutoff frequency 13Use the front panel knob to place the marker at the highest peak in the stop band to determine the minimum stop band atten...

Страница 65: ...onvenient 0 dB reference 1 Connect the DUT to the directional bridge or coupler as shown below Terminate the unconnected port of the DUT Figure 4 19 Reflection Measurement Short Calibration Test Setup N9340A HANDHELD SPECTRUM ANALYZER 100 kH z 3 0GHz PRESET ENTER FREQ SPAN AM PTD BW SWP SYS M ODE M EAS TRACE ESC CLR 2 DEF 3 GHI 1ABC 5M NO 4 JKL 6PQR 8VWX 7STU 9 YZ_ 0SAVE LIM IT M ARKER Coupled Por...

Страница 66: ...tion bandwidth Press FREQ Start Freq 100 MHz Press FREQ Stop Freq 1 GHz Press BW Avg 1 MHz 7 Replace the DUT with a short circuit 8 Normalize the trace Press MEAS Normalize Store Ref 1 4 Normalize On This activates the trace 1 minus trace 4 function and displays the results in trace 1 The normalized trace or flat line represents 0 dB return loss Normalization occurs with each sweep Replace the sho...

Страница 67: ...Making Measurements Making a Reflection Calibration Measurement 61 Figure 4 20 Short Circuit Normalized ...

Страница 68: ... page 45 to calculate the return loss of the 370 MHz low pass filter 1 After calibrating the system with the above procedure reconnect the filter in place of the short cal device without changing any analyzer settings 2 Use the marker to read return loss Position the marker with the front panel knob to read the return loss at that frequency Rotate the knob to find the highest peak and the readout ...

Страница 69: ...easure their power contributions The analyzer supports the U2000 Series USB power sensors The U2000 Series USB power sensors do not need manual calibration and zero routines performed Calibration and zeroing are performed without removing the power sensor from the source through internal zeroing With internal zeroing of U2000 Series USB power sensors there is no need to disconnect the sensor or po...

Страница 70: ...ting the Power Meter every time you cycle the power on and off In most situations you can press Zero to complete the two steps zero and cal together NOTE If you suspect other signals may be present it is recommended that you turn off all the other channels and measure average power only on the signal of interest Another option is to measure channel power which is less accurate that filters out all...

Страница 71: ...r followed by a calibration operation 4 Connect the power sensor to the power Ref 50 MHz port The analyzer supports the U2000 Series power sensors 5 Connect the external attenuation if required with the power sensor used 6 Connect the analyzer to the base station Connect the power sensor to the signal to be measured A typical BTS connection is after the output of the power amplifier and duplexer T...

Страница 72: ...ter s Top and Bottom End Points Setting the end points Disk Range close to expected measurement value changes the sensitivity of the Power Meter scale resolution This is an advantage in viewing small changes in power However this will not affect the overall range of the sensor 1 Press Preset to perform a factory preset 2 Press MODE Power Meter ENTER to turn on the power meter 3 Press Meas Disp Dis...

Страница 73: ... factory preset 2 Press MODE Power Meter ENTER to turn on the power meter 3 Press Meas Setup Limits to access the limits menu 4 Press Limits to activate the limits function Each time the softkey is pressed the selected option changes 5 Press Upper Limits and enter the high limit value using the numeric keypad Then press dBm to complete the setup 6 Press Lower Limits and enter the low limit value u...

Страница 74: ... strong signal and blue for noise floor The Y axis represents time with the trace from the newest sweep displayed at the bottom of the screen Earlier traces move up toward the top with each new sweep Two coupled markers allow the user to place a marker on any trace in the spectrogram and view the normal spectrum for the time of that sweep The time interval between sweeps can be adjusted and up to ...

Страница 75: ...or you to load the saved file as below Press Save Load Load Spctrg Rotating the knob to highlight the file which will be recalled Press Load Now the spectrogram will be loaded Spectrogram Monitoring with Option INM Option INM extends the N9340B spectrogram capability further with the ability to continuously monitor and save spectrogram data over time not only to the analyzer s internal memory or a...

Страница 76: ... measured without the audio alert The Alert Limit is set to specify the lowest band power that makes the buzzer beep Please refer to the procedures below to turn on the audio alert 1 Press Meas Spectrogram to access into the spectrogram mode 2 Press Marker More Audio Alert to enable the audio alert NOTE For the spectrogram the marker operation is only within 200 frames displayed on screen And on P...

Страница 77: ...example the signal source is used transmitting at 300 MHz with FM deviation of 10 kHz and FM rate of 1 kHz 3 Set the center frequency to the center of the FM signal in this case 300 MHz Press FREQ 300 MHz 4 Set the analyzer to zero span for time domain analysis Press SPAN Zero Span Press BW SWP Sweep Time 4 ms 5 Turn off the input attenuation and turn on the optional pre amplifier Press AMPTD Atte...

Страница 78: ... RBW should be 2 x 10 kHz 2 x 1 kHz 22 kHz With 1 3 10 sequence RBW selec tions choose the next highest RBW of 30 kHz Press BW SWP 30 kHz 7 Turn on the FM demodulator Press SPAN Demod FM ON Listen to the FM audio signal Press SPAN Demod Speaker Vol rotate the knob Alternatively you can also use the headphone jack ...

Страница 79: ...M modulation index or FM deviation and Minimum carrier frequency offset The user can save the waveforms with metrics for reporting as well as the set up parameters for future measurements or analysis In the following example you can use any source available such as AM FM radio as long as it has AM FM signal generation capability AM Demodulation Analysis Please refer to the procedures below for the...

Страница 80: ...th exceeds the limits set as above Figure 4 24 AM demodulation analysis FM Demodulation Analysis Please refer to the procedures below for the FM demodulation analysis 1 Connect the signal generator to RF IN connector and turn on the signal generator s FM and RF output 2 Turn on the FM demodulation analysis function Press MODE Rotating the knob to highlight Demod ulation Analysis ENTER FM 3 Press C...

Страница 81: ...Press Y Scale Auto Scale Return to set the Y scale 6 Set the FM deviation limit and turn on the limit function Press More 1 of 3 Limits FreqDev UP 11 FreqDev Low 9 9 Limits on Return The red value in the result indicates the demodulated fM deviation exceeds the limits set as above Figure 4 25 FM demodulation analysis ...

Страница 82: ...ation and ASK index etc The waveform with metrics and setup parameters can be saved for reports and future Measurements In the following example you can use any source available such as your remote key of the car as long as it has ASK FSK generation capability For ASK FSK signal its Filter is Nyquist and Alpha is 0 35 ASK Demodulation Analysis Please refer to the procedures below to analysis the A...

Страница 83: ...efault Press More 1 of 3 More 2 of 3 Attenuation Auto More 3 of 3 7 Press Y Scale Auto Scale Return to set the Y scale 8 Setting the ASK depth limit and turn on the limit function Press More 1 of 3 Limits ASK Depth UP 71 ASK Depth Low 70 Limits on Return 9 Press More More View Eye Diagram to view the eye diagram The figure below indicates the ASK EYE Diagram as a measurement result Figure 4 26 ASK...

Страница 84: ...ob to highlight Demod ulation Analysis ENTER FSK 3 Press Carries Freq 100 MHz to set the carrier frequency 4 Press Symbol Rate 10 ksps to set the symbol rate 5 Press Filter Setup Ref Filter Nyquist Return to set the filter type 6 Set the attenuation state to Auto default Press More More Attenuation Auto More 7 Press Y Scale Auto Scale Return to set the Y scale 8 Setting the FSK deviation limit and...

Страница 85: ... capture and remove intermittent interference the engineer may need to work in the field for extended periods of time The xDSL Measurement mode Option XDM provides the capability to measure the ADSL ADSL2 and VDSL network with a frequency range of 3 kHz to 40 MHz Figure 4 28 xDSL Measurement NOTE An xDSL probe from Vierling is required to connect the N9340B analyzer to xDSL networks in the field N...

Страница 86: ... a USB stick into N9340B 6 Set the start frequency as 3 kHz and stop frequency as 2 MHz Press FREQ Start Freq 3 kHz Press Stop Freq 2 MHz 7 Press BW SWP 1 kHz to set the RBW 8 Press MODE Rotating the knob to highlight xDSL Measurement ENTER 9 Press Disp mode Spctrg Trace 10Press Save Load File Setup File Path USB 11Press Return Start Save The analyzer begins to automatically save the spec trogram ...

Страница 87: ...is Chapter provides descriptions of the Instrument hardkeys and softkey menu functionality key access to softkey sub menus and instrument parameter control options The additional reference information is provided in Menu Map on page 149 ...

Страница 88: ...rence level use the arrow keys the knob or the numeric keypad Pressing any digit 0 through 9 on the numeric keypad brings up the terminator menu Attenuation Key access AMPTD Attenuation Toggles the input attenuation between Auto or Man The input attenuation ranges from 1 dB to 51 dB and allows you to set the attenuation level in 1 dB increments when attenuation is set to Man The input attenuator n...

Страница 89: ...ion on the display Scale Type Key access AMPTD Scale Type Toggles the scale type of vertical graticule divisions between logarithmic and linear When Scale Type is set to Log a logarithmic units is activated ranging from 1 to 10 dB per division When Scale Type is set to Lin the vertical divisions are linearly scaled and the default amplitude units are volts The top of the display is set to the refe...

Страница 90: ... loss occurs between a device under test and the analyzer input Thus the signal level measured by the analyzer may be referred to as the level at the input of an external amplitude conversion device When an amplitude offset is entered its value appears in the lower left corner of the display Y Axis Units Key access AMPTD More Y Axis Units Sets the amplitude units NOTE Reference level offsets are o...

Страница 91: ...cale Key access AMPTD More Press this softkey to turn on the amplitude scale unit display on the left of the graticule The unit determined by the Y Axis Unit softkey PSD Mode Key access AMPTD More Press this softkey to toggle the Power Spectral Density display mode between On and Off NOTE Reference level offsets will be adjusted automatically when toggles the PSD Mode between On and Off ...

Страница 92: ... video bandwidth if in auto couple mode changes to maintain the VBW RBW ratio A mark appears next to RBW on the display when it is not coupled VBW Key access BW SWP VBW Changes the analyzer post detector filter from 3 Hz to 1 MHz in a 1 3 10 sequence using the knob the step keys or the numeric keypad As the video bandwidth is decreased the sweep time is increased to maintain amplitude calibration ...

Страница 93: ...tions to automatically or manually choose from one of the following averaging type Log Pwr Key access BW SWP Avg Type Log Pwr Averages the data as appropriate for the logarithmic scaled y axis When average type is set to Log Pwr LgAv appears on the left side of the display Pwr Key access BW SWP Avg Type Power Converts the scale from logarithmic to linear power units and then averages the power tra...

Страница 94: ...N9340B All except VBW filtering are affected by this setting They are listed as follows Trace averaging Averages signal amplitudes on a trace to trace basis Press Log Pwr or Pwr Average detector Averages signal amplitudes during the time or frequency interval and represents the result as a single measurement point Noise marker Averages signal amplitudes across measurement points to reduce variatio...

Страница 95: ...on Bandwidth The selected Video Bandwidth Note that changing one of the three factors above will change the sweep time The sweep time is in direct ratio to frequency span and is in reverse ratio to the selected resolution bandwidth and video bandwidth when auto coupled In zero span Auto coupled does not function when in a zero span The sweep time can only be set manually The sweep time is selectab...

Страница 96: ...s sweep mode and the single sweep mode Sweep Single Puts the analyzer in a single sweep mode In this mode pressing BW SWP Single Sweep enables a sweep Sweep Cont Performs one sweep after another as soon as it is triggered Pressing Preset When Preset Type is set to Default or turning the power on sets the sweep mode to continuous sweep as default Sweep Mode Key access BW SWP Sweep Sweep Mode An N93...

Страница 97: ...weep time can be set no less than 4 616ms 461 points of one trace of N9340B to measure the signal Single Sweep Key access BW SWP Sweep Single Sweep When the analyzer is in continuous sweep mode and not in a measurement mode MEAS Measure Off pressing BW SWP Single Sweep will change the sweep setting to single sweep It will then begin a sweep after the trigger conditions are met If the analyzer is a...

Страница 98: ...entry and cause the title to revert to the previous name Clears input or output overloads Clears error messages from the status line along the bottom of the display Association with other functions Provides a permitted setting for triggering other functions such as Activates LIMIT function for pass fail judgements Activates SAVE function for current trace saving CAU CAUTION When pressing ESC CLR t...

Страница 99: ...e of the graticule The left and right sides of the graticule correspond to the start and stop frequencies When these frequencies are activated their values are displayed below the graticule in place of center frequency and span Stop Frequency Key access FREQ Stop Freq Sets the frequency at the right side of the graticule The left and right sides of the graticule correspond to the start and stop fr...

Страница 100: ...the current frequency span of the analyzer When auto coupled the center size is set to one division 10 percent of the span Freq Offset Key access FREQ Freq Offset Allows you to input a frequency offset value that is added to the frequency readout of the marker to account for frequency conversions external to the analyzer Offset entries are added to all frequency readouts including marker start fre...

Страница 101: ... trace it will become active on that trace if that marker is selected Normal Key access MARKER Normal Activates a single frequency marker at the center of the active trace if a marker is not already displayed If a marker is displayed before the Normal function is enabled the marker is enabled at the position of the selected marker The marker number is indicated above the marker The knob and or arr...

Страница 102: ...dicates the frequency or time and amplitude differences between the two markers The markers will be turned off if the scale type is changed between log and linear Off Key access MARKER Off Turns off the active function markers NOTE Pressing Delta again moves the reference marker to the active marker position so you are allowed to make delta measurements from differing reference points without havi...

Страница 103: ...ker will not move and the No Peak Found error message will appear on the display Next Right Peak Moves the marker to the next peak to the right of the current marker The signal peak must exceed the peak threshold value by the peak excursion value If there is no peak to the right the marker will not move and the No Peak Found error message will appear on the display Key access MARKER Peak Search Ne...

Страница 104: ...o the active marker value moving the marked point to the reference level top line of the graticule In Delta mode pressing Marker Marker To To Ref sets the reference level to the amplitude difference between the markers Mode Key access MARKER More Mode Accesses the following menu keys that allows you to change the active marker readout mode Normal Activates the default readout mode Freq Count Activ...

Страница 105: ...race 1 as default All Off Key access MARKER More All Off Turns off all of the markers including markers used for signal track and demodulation The marker annotation is also removed Marker Table Key access MARKER More Marker Table Compresses the graticule and displays the marker number trace number marker type X axis value and the amplitude in the table NOTE Frequency counter is properly effective ...

Страница 106: ...it the percentage of signal power used when determining the occupied bandwidth Press to set the percentage ranging from 10 00 to 99 99 Setting dBc Press OBW Method dBc to specify the power level used to determine the emission bandwidth as the number of dB down from the highest signal peak within the occupied bandwidth span This function is an independent calculation from the OBW calculation The x ...

Страница 107: ... of the main channel power Main Channel Key access MEAS ACPR Main Channel Specifies the range of integration used in calculating the power in the main channel Use the knob the arrow keys or the numeric keypad to set the bandwidth Adjacent Channel Key access MEAS ACPR Adj Channel Specifies the range of integration used in calculating the power in the adjacent channel Use the knob the arrow keys or ...

Страница 108: ...orrectly before making this measurement using the following formula Where k is a value between 1 2 and 4 0 and n is the number of trace points Center Frequency Key access MEAS Channel Power Center Freq Sets the center frequency of the display Integration Bandwidth Key access MEAS Channel Power Int BW Specifies the bandwidth of integration bandwidth which can range from 100 Hz to 3 GHz to calculate...

Страница 109: ...umber Press Avg Number On to specify the number of measurement averages used when calculating the measurement result The average will be displayed at the end of each sweep Meas Type Key access MEAS More SEM Meas Type Displays a menu where you can select a measurement reference type Total Pwr Ref or PSD Ref When Total Pwr Ref is selected the power in the carrier is used as the reference in computin...

Страница 110: ...he menus where you can change the following parameters for offset frequency settings and pass fail tests Offset Start Freq Stop Freq Sweep Time Res BW and Limits Refer to the tables below for default settings of particular radio standards of interest Table 1 Offsets Limits Defaulted for W CDMA 3GPP Base Station Measurements a a Fail Mask is set to Absolute and Rel Stop is set to Couple Offset Star...

Страница 111: ...39 00 1 C On 7 500 8 500 1000 00 55 84 55 84 Man 39 00 49 00 1 D On 8 500 12 000 1000 00 55 84 55 84 Couple 49 00 49 00 1 E Off 12 500 15 000 1000 00 55 84 55 84 Couple 49 00 49 00 1 Offset Start Freq MHz Stop Freq MHz Abs Start dBm Abs Stop dBm Abs Couple Rel Start dBc Rel Stop dBc Rel Couple Meas BW A On 9 00 11 00 16 00 4 00 Man 0 00 20 00 Man 1 B On 11 00 20 00 4 00 12 00 Man 20 00 28 00 Man 1...

Страница 112: ...Key access MEAS SEM Offset Limits Specifies the inner limit frequency closest to the carrier for both segments of the specified offset pair When Start Freq Off is selected the offset pair is not measured Stop Freq Key access MEAS SEM Offset Limits Specifies the outer limit frequency furthest from the carrier for both segments of the specified offset pair The minimum frequency difference between St...

Страница 113: ... 00 to 50 00 dBm with 0 01 dB resolution and to toggle this function between Couple and Man If set to Couple this is coupled to Abs Start to make a flat limit line If set to Man Abs Start and Abs Stop you can enter different values to make a sloped limit line Rel StartAmpt Key access MEAS SEM Offset Limits More Enters a relative level limit at Start Freq ranging from 150 00 to 50 00 dBc with 0 01 ...

Страница 114: ...sults and the test limits Absolute Sets the limit test to show Fail if one offset is larger than the corresponding limit for Abs Start and or Abs Stop This is the default selection for each offset for BTS measurements Relative Sets the limit test to show Fail if one offsets spectrum emission mask measurement results is larger than the corresponding limit for Rel Start and or Rel Stop Abs AND Rel S...

Страница 115: ...ermine the Update Interval that provides the maximum data collection speed A data sample is taken every time interval for display on the spectrogram Increasing the update time allows data capturing over a longer period of time in the spectrogram Spec View Key access MEAS Spectrogram Spec View Enables you to view the details in the captured spectrogram when the Spectrogram is running Pressing Spec ...

Страница 116: ... Start Stop Save This softkey allow you to start or stop the automatic save function Once the spectrogram measurement frames reached the file size set in the File Setup a file SPE or CSV will be automatically saved and the spectrogram measurement will restart Timed Setting Key access MEAS Spectrogram Save Load Time Setting This submenu allows you to configure automatic time save function You can s...

Страница 117: ...e Load Save RAM Press this key to save the current spectrogram measurement data into a file with default name Save RAM As Key access MEAS Spectrogram Save Load Save RAM As Press this key to save the current spectrogram measurement data into a file with user defined name Load Spctrg Key access MEAS Spectrogram Save Load Load Spctrg Press this key to load a pre saved SPE Spectrogram file from local ...

Страница 118: ...NTER to make the spectrum analysis and measurement Tracking Generator Key access MODE Tracking Generator Select this mode and press ENTER to make specified measurement with tracking generator When selected the Meas softkey menu for the tracking generator mode will appear Amplitude Key access MODE Tracking Generator Amplitude Activates On or deactivates Off the output power of the tracking generato...

Страница 119: ...ed to the device under test CAU CAUTION Power level sensitive devices connected to the tracking generator output may be accidentally damaged This is because the actual source amplitude will be greater than the amplitude indicated on the analyzer when the power sweep function is being used The source amplitude value is used as the starting amplitude for a power sweep The ending amplitude for a powe...

Страница 120: ... normalized reference level is changed This function remains in effect on all subsequent sweeps until it is turned off The normalize function is useful for applying correction data to a trace while making a stimulus response measurement using a tracking generator Normalize will compensate for irregularities of the components used in the test setup isolating the performance of the DUT For example c...

Страница 121: ... decreasing measurement accuracy Ref Trace Allows you to view or blank the reference trace on the display Power Meter Key access MODE Power Meter Use the arrow keys to highlight the mode Select this mode and press ENTER to make a measurement using the power meter function When selected the Power Meter softkey menu will be displayed and many of the instrument hardkeys will be disabled as they are n...

Страница 122: ...d resolution while in Power Meter mode Disp Range Access the associated Disp Range submenu Auto Range Toggles the auto range function between On and Off When the Auto Range is set to On the Top and Bot tom value of the power meter s display range will be set automatically according to the measurement data Top Max data 0 5 Bottom Min data 0 5 The default setting is Off Top Set the top value of the ...

Страница 123: ... View Access the Chart View submenu This soft key is dis abled when the measurement is in process or if the display mode is set to Meter This submenu is used to view the measurement chart Home View the first 21 points of current measurement chart End View the lastest 21 points of current measurement chart Prev View the previous points of the chart Next View the next points of the chart Continue Pa...

Страница 124: ...er Range submenu Auto Range Enables and disable auto ranging When auto ranging is ON the power sensor selects the best measuring range for the measurement When auto ranging is OFF the power sensor remains in the current range and may be manually set by the user Range Selects the Lower or Upper of power ranges when the Auto Range is Off Limits Accesses the Limits submenu Limits Enables or disables ...

Страница 125: ...nd enable or disable the display offset The display offset is applied to the measurement signal after any math calculation Average Accesses the Average submenu Average Enables or disables the Average function Avg Count Sets a value of the filter length and to set the average count value to be Auto or Manual The power sensor automatically sets the number of readings averaged together to satisfy mos...

Страница 126: ...Key access MODE Power Meter Preset Sets the power meter softkey menu options to the preset conditions For example the upper and lower limits are set to their preset limit values IBOC Measurement Key access MODE IBOC Measurement Use the knob or arrow keys to highlight the mode and press ENTER to access the AM FM IBOC In Band On Channel measurement submenu AM FM Key access MODE IBOC Measurement AM F...

Страница 127: ...IBOC is a shortcut to set center Fre quency to a standard carrier frequency near current center frequency and set span to 50 kHz Quick Span in FM submenu Mask Span is a shortcut to set center frequency to a standard carrier frequency near current center frequency and set Span to 1 3 MHz FM Band is a shortcut to set center frequency to 97 9 MHz and set Span to 21 3 MHz FM Channel Analog is a shortc...

Страница 128: ...ation The mask types for IBOC AM are listed as below FCC AM 73 44 NRSC 5 B Hybrid 5k NRSC 5 B Hybrid 8k NRSC 5 B All Digital Figure 5 1 IBOC AM spectral emission mask and limits 80 60 40 20 0 20 40 60 80 110 100 90 80 70 60 50 40 30 20 10 0 Offset from c arrier frequenc y k Hz Level relative to unmodulated carrier dBc IBOC AM spec tral emission mask and limits Trace in red is FCC spectral emission...

Страница 129: ... is FCC spectral emissions mask Trace in blue is NRSC hybrid spectral emissions limits Trace in Black is NRSC all digital spectral emissions limits Mask On Off Mask On Off is a switch to enable the mask function Set Span and RBW according to mask standard automatically Set Average Type to Power and Detector to Average RMS and also set average on with average times to meet the measurement specifica...

Страница 130: ...surement AM FM Auto Tune Press this softkey to automatically find out the largest signal over specific broadcasting frequency band e measure its carrier frequency more accurate and measure its unmodulated carrier power or nominal power spectral density in a 1 kHz bandwidth of the digital Primary Main sidebands for All Digital IBOC FM case These two parameters will be adopted as 0 Hz offset of mask...

Страница 131: ...trogram Toggles the spectrogram between Run and Pause Restart Meas Key access MEAS xDSL Measurement Restart Meas Resets the spectrogram display Update Interval Key access MEAS xDSL Measurement Update Int Enables you to set the interval of time to update data to 1 or more seconds Or you may set it to automatically determine the Update Interval that provides the maximum data collection speed A data ...

Страница 132: ...rement Palette Toggles the spectrogram color mode between full color and gray scale Disp Mode Key access MEAS xDSL Measurement Disp Mode Allows you to set the spectrogram display mode as trace spectrogram or both trace and spectrogram Save Load Key access MEAS xDSL Measurement Save Load This softkey is only available with option INM activated Start Stop Save Key access MEAS Spectrogram Save Load S...

Страница 133: ...om the Start Time File Setup Key access MEAS Spectrogram Save Load File Setup This submenu allows you to set the File Type File name File Path and File Size 100 1500 frames Save RAM Key access MEAS Spectrogram Save Load Save RAM Press this key to save the current spectrogram measurement data into a file with default name Save RAM As Key access MEAS Spectrogram Save Load Save RAM As Press to save t...

Страница 134: ...ency span range value Full Key access SPAN Full Changes the span to the full frequency range of the analyzer Zero Key access SPAN Zero Changes the frequency span to zero In this mode the current center frequency is displayed in the time domain the x axis is displayed in units of time like a conventional oscilloscope Last Span Key access SPAN Last Span Changes the span to the previous span setting ...

Страница 135: ...o be demodulated to within 3 divisions of the top of the display Speaker Vol Key access SPAN Demod Speaker Vol Selecting AM or FM turns the speaker on Press this softkey and rotate the knob to adjust the internal speaker volume Delay Time Key access SPAN Demod Speaker Vol Allows you to set the time in non zero spans to pause and demodulate the signal after each sweep The demodulated signal can be ...

Страница 136: ...tate of trigger mode Video Key access SPAN Trigger Video Activates the trigger condition that starts the next sweep if the detected RF envelope voltage rises to a level set by the video trigger level NOTE It is normal to hear clicking sounds when the Auto Alignment function is On During retrace a small portion of the analyzer circuitry is realigned Some of the switching of the analyzer circuitry i...

Страница 137: ...s through approximately 2 volts The external trigger signal must be a 0 V to 5 V TTL signal Sets the trigger polarity to positive Ext Fall Key access SPAN Trigger Ext Fall Sets the trigger polarity to negative Trig Delay Key access SPAN Trigger Trig Delay Allows you to set and turn on or off a delay during which the analyzer will wait to begin a sweep after receiving an external trigger signal ...

Страница 138: ...e Erases any previously stored trace data and continuously updates the display during following sweeps of the analyzer This function is activated for trace 1 at power on and factory preset Max Hold Key access TRACE Max Hold Maintains the displayed maximum level for each trace point of the selected trace A trace point is updated if a new maximum level is detected in successive sweeps NOTE Changing ...

Страница 139: ...e register will not be updated as the analyzer sweeps This function is activated for traces 2 3 and 4 at power on and Factory Preset Detector Key access TRACE More Detector Selects a specific detector type or allows the system to auto select the appropriate detector for a measurement For every trace point displayed there is a finite time during which the data for that point is collected The analyz...

Страница 140: ...last display point and the present display point and stores this value in memory It is used primarily when measuring sinusoidal spectral components When Positive Peak is selected P appears in the upper left corner Sample Primarily used to display noise or noise like signals It should not be used to measure the accurate amplitude of non noise like signals In sample mode the instantaneous signal val...

Страница 141: ...ng occurs A new average number is entered Any related parameter e g center frequency is changed Press Average Off to turn off averaging The number of sweeps can only be set using the numeric keypad not the knob or arrow keys Save Trace Key access TRACE More Save trace Saves a current trace into a file DAT The analyzer uses the filename of the preceding file saved but adds an integer in 1 2 3 seque...

Страница 142: ...y with a user defined filename The filename is entered using the numeric keypad and terminated by pressing ENTER Numbers alpha characters and underline are all valid components of a filename Recall Trace Key access TRACE More Recall trace The user may recalls a saved trace as the current activated trace ...

Страница 143: ...ys knob or numeric keypad may be used to adjust the display line Pressing any digit 0 through 9 on the numeric keypad brings up the selected terminator menu To deactivate the display line press Display Line Off Limits Key access Limit Limits Turns on the limit pattern function and turns off the limit line function simultaneously Edit Limits Key access Limit Edit Limits Allows you to set a limit pa...

Страница 144: ...it set to on it sounds an alarm as an indicator of a measurement limit failure Save Limits Key access Limit Save Limits Saves the parameters of the current limit pattern in a file LTM Enter the user defined filename using the numeric keypad and press ENTER as a terminator Number alpha characters and underline are all valid components of a filename Load Limits Key access Limit Recall Limits Recalls...

Страница 145: ...139 Error Messages 6 Error Messages This chapter contains Error Message information and definitions used by the analyzer ...

Страница 146: ... In this example a failure explanation is generally included with each error to further define its meaning The instrument messages in this guide are listed numerically NOTE A symbol F at the beginning of an error message indicates this is an error caused by manual front panel operation A symbol R at the beginning of an error message indicates this is an error caused by remote control mode 07 01 15...

Страница 147: ...uch data Indicates a legal program data element of block expression or string type was received that contained more data than the device could handle due to related device specific requirements or memory 222 Data out of range Indicates a legal data was parsed but could not be executed because of the interpreted value was outside the legal range defined by the analyzer The displayed results may be ...

Страница 148: ...ence 171 File loaded Indicates the file loading succeeded 170 The menu is unavailable in this case Indicates the memo is invalid in this case 166 Marker counter opened in fast sweep Indicates the counter s accuracy decreases when in fast sweep mode 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 me...

Страница 149: ...ttenuation or decrease the input signal level 138 USB device NOT ready Indicates the USB device is not detected 136 RBW limit to 30 kHz when in fast sweep Indicates the analyzer automatically couple the RBW to 30 kHz when in fast sweep mode 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 u...

Страница 150: ...Error Messages Error Message List 144 ...

Страница 151: ...w to check for a problem with your Keysight Technologies spectrum analyzer and how to return it for service If you experience a problem or would like additional information about your analyzer Keysight Technologies worldwide organization is ready to provide the support you need ...

Страница 152: ...unning Feel the rear side of the analyzer for air flow If other equipment cables and connectors are being used with your spectrum analyzer make sure they are connected properly and operating correctly Review the measurement procedures being performed when the problem first appeared Make sure all of the settings are correct If the analyzer is not functioning as expected return the analyzer to a kno...

Страница 153: ...nance plans to service your analyzer after the warranty has expired R 51B 001 3C extends this service to 3 years R 50C 011 3 Keysight calibration upfront support plan 3 year coverage The calibration cycle of N9340B Handheld spectrum analyzer is one year NOTE If the analyzer is still under warranty or is covered by a maintenance contract it will be repaired under the terms of the warranty or plan t...

Страница 154: ...Troubleshooting Contact Keysight Technologies 148 Contact Keysight Technologies ...

Страница 155: ...p This chapter contains menu maps that visually present the menus and submenus that are accessed by pressing the hardkeys and softkey menu selections in the instrument This is a quick reference guide for the experienced user ...

Страница 156: ...TD Ref level Attenuation Auto Man Preamp Off On Scale DIV Scale Type Log Lin HiSensitivity More dBm 1 dB DIV 2 dB DIV 5 dB DIV 10 dB DIV dBmV dBuV W V Off On Y Axis Unit Ref Offset EMF Mode Off On Grid Scale Off On PSD Mode Off On ...

Страница 157: ...Menu Map AMPTD 151 ...

Страница 158: ...BW SWP RBW VBW VBW RBW Avg Type Sweep Time Auto Man Sweep Single Sweep Log Pwr Power Voltage TD Mode Auto Man Auto Man Auto Man Sweep Single Cont Sweep Mode Normal Fast Off On Menu Map BW SWP 152 BW SWP ...

Страница 159: ...q Center Freq CF Step Auto Man Start Freq Stop Freq Channel STD Standard Off On Load STD Chan name Channel Fwd Rev Channel Step STD Type System User Load Now Copy Delete Freq Offset Menu Map FREQ 153 FREQ ...

Страница 160: ...To More Peak 6 Peaks Search 1 2 3 4 5 6 Next Left PK Next Right PK 1 of 2 To Center To Ref Mode All Off Marker Trace Normal Freq Count Noise Band Power Marker Table Off On Trace 1 Trace 3 Trace 4 Trace 2 Off On All Ref Preset Menu Map MARKER 154 MARKER ...

Страница 161: ...nter Freq Int BW Channel BW Center Freq Adj Channel Channel Space Main Channel Percent dBc SEM More Spectrogram Avg Number Meas Type Ref Channel Offset Limit Fail Setting AntennaTable Spectrogram Restart Meas Update Int Run Pause Off On Spectrg View Palette Color Gray Display Mode Save Load ...

Страница 162: ...Analog AM Channel IBOC Mask Span Return FMBand FM Channel Analog FM Channel IBOC FM AM Mask Return Mask Type Analog On Off Pass Fail On Off Beep On Off NRSC 5 B Return AM 73 44 Analog Hybrid 5kHz NRSC 5 B Hybrid 8kHz NRSC 5 B AllDigital Custom NRSC 5 B Return FM 73 317 Analog Hybrid NRSC 5 A Custom AllDigital FM AM MODE Limit Load Now Return System User AMorFM Custom Channel Noise Cancel On O ff ...

Страница 163: ...nerator MODE Spectrum Analyzer Source Power Meter Tracking Generaotr Demodulation Analysis Amplitude Off On Amptd Step Amptd Offset Normalize Store Ref 1 4 Normalize Norm Ref Lvl Norm Ref Posn IBOC Measurement Off On Ref Trace Blank View xDSL Measurement ...

Страница 164: ...Limits Rel Offset Average Meas Interval MODE Zeroing Zero Type INT EXT Power Meter Disp Range Resolution 1 2 3 4 Disp Mode Meter Chart Chart View Continue Auto Range Range Lower Upper Limits On Off Upper Limit Lower Limit Limit Beep On Off Rel On Off Offset On Off Average On Off Avg count On Off Step Detect On Off ...

Страница 165: ...cale Ref P osition Left Scale DIV Peak Return Peak Peak 2 RMS MODE Y Scale Peak Hold On O ff On O ff Ext Gain AM FM Average Auto CarrFreq More CarrFreq Step Limits Sweep Single O n O ff O n O ff Single C ont Preamp More Attenuation On Off CarrPow Upr Limit AM Depth Up O n O ff AM Depth Low C arrFreOff Up FreqDev Up FreqDev Low Ext Gain is only available in Y Scale submenu ...

Страница 166: ...or Eye Diagram MODE Y Scale On O ff Ext Gain ASK FSK Average Limits More Meas Length Trigger Sweep Single O n O ff Si ngl e C ont Auto CarrFreq More CarrFreq Step O n Off CarrPow Upr Limit FreqDev Up O n O ff FreqDev Lo w CarrFreOff Up Attenuation A uto Man Preamp O n Off RF Trigger Free Run Ext Rise Ext Fall Trig Delay O n O ff Ref Filter Meas Filter Alpha BbT Filter Symbols ASK Dep th Up ASK Dep...

Страница 167: ...ayback xDSL Palette Disp Mode Save Load Measurement Update Int Color Gray Play Stop Direction Update Int Down Up Off On Spctrg Trace Spctrg Trace Start Save Timed Setting File Setup Save RAM Save RAM As Load Spctrg Time Save Start Date Start Time Off On Stop Date Stop Time File Type File Name File Path File Size Local USB ...

Страница 168: ...162 SPAN SPAN Span Full Span Zero Span Last Span Demod Trigger The trigger menu is available when span is set to zero span AM Off On FM Off On Speaker Vol Free Run Video Ext Rise Ext Fall Off On Trig Delay Delay Time ...

Страница 169: ... Mode Power Manager File Type Save Path Backlight Trace State Screen CSV Load default User Setup Limit Setup LoadSYS Setup Add Option Show Option Screen Save Language LCD All Shortcut Type Switch Timer PwrOn Preset Key Beep Power On Save User Upgrade Firmware SaveSYS Setup IP Address Static DCHP Sys Name Gateway Subnet Mask Local USB Trace Screen Power On Power Off Repeat Mode Once Everyday Timer ...

Страница 170: ...Clear Write Max Hold Min Hold View Blank More 1 2 3 4 1 of 2 Detector Save Trace Average Normal Average Pos Peak More 2 of 2 Auto Man Off On Save As Recall Trace Sample Neg Peak Avg Restart Menu Map TRACE 164 TRACE ...

Страница 171: ... Upper Lower LIMIT Limit Line Limit Load Limits Off On Off On Off On Limits Points Limits Table Limits Offset Limit Limit Edit Limits Fixed Rel Limit Load Now Copy Delete System User X Axis Unit Freq Time Menu Map Limit 165 Limit ...

Страница 172: ...This information is subject to change without notice Keysight Technologies 2008 2015 Edition 3 December 2015 ...

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