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1、!“Agilent N9340B Handheld Spectrum AnalyzerDemonstration GuideIntroductionThis demo guide is a tool to gain familiarity with the basic functions and features of the Agilent N9340B handheld spectrum analyzer.Almost all exercises utilize a signal from an external signal generator with amplitude of -10
2、 dBm and the frequency of 100 MHz.Key names surrounded by indicate hardkeys located on the front panel, while key names surrounded by indicate softkeys located on the right of the display.Demos1. Panel Tour2. File Operation3. Measurement Basics4. Peak Search and Makers5. Measuring Signal to Noise wi
3、th Delta Markers6. Improving Signal to Noise7. Limit Lines and Pass/Fail Testing8. Spectrogram9. Tracking Generator10. Power Meter11. Field Strength Measurement12. AM/FM, ASK/FSK Demodulation13. Spectrum Emission Mask14. Automation2Section 1 Panel TourCaptionFunction1Power SwitchToggles the analyzer
4、 between on and off2Function keysIncludes hardkeys: SYS, FREQ, SPAN, AMPTD, BW/SWP, TRACE, MEAS, and MODE3Preset Returns the analyzer to a known state, also turns on/off power save feature (press for 1 sec.)4EnterConfirms a parameter selection or configuration5MARKERActivates the marker function6ESC
5、/CLRExits and closes the dialog box or clears the character input7LIMIT Sets limit lines for quick Pass/Fail judgement8Save Quick saves the current trace9Arrow keysIncreases or decreases a parameter step by step10Knob Selects an option item or edits a numerical parameter11SoftkeysIndicates current m
6、enu functions12SpeakerActive when in demodulation mode13Built-in light sensorAdjust the brightness automatically14ScreenDisplays measured traces and status14123456789101112133Top Panel OverviewPC12-18 VDC55W MAX50 VDC MAX33 dBm (2 W) MAXRF INPUT 50 RF OUT 50 EXT TRIG IN/ EXT REF INExt. Power Chargin
7、g12934578106CaptionFunction1External DC power connectorProvides input for the DC power source via an AC-DC adapter, or Automotive type DC adapter. 2LED indicator (Charging)Lights (On) when the battery is charging3LED indicatorLights (On) when external DC power is connected to the tester4USB interfac
8、e (Device)Connects to a PC5USB interface (Host)Connects to a USB memory stick or disk6HeadphoneConnects to a headphone7LAN InterfaceConnects to a PC for SCPI remote control8RF OUT ConnectorThe output for the built-in tracking generator. Enabled with Option TG3.9EXT TRIG IN/REF IN (BNC, Female)Connec
9、ts to an external TTL signal or a 10 MHz refer- ence signal. The TTL signal is used to trigger the analyzers internal sweep10 RF IN Connector (50 )Accepts an external input with a frequency range from 100 kHz to 3 GHz, tunable to 9 kHz.4Auto-Brightness and Back-lit KeysCommunication system maintenan
10、ce and repair often requires a technician to troubleshoot in bright daylight or in the darkness of night. There is a light sensor on the front panel of the N9340B that senses the ambient light and automatically adjusts the brightness of the display and its back-lit keys.The user can also manually se
11、t the brightness of the display, and also the brightness of the back-lit keys, so they can be seen clearly even in any light, and the duration of the key light is settable, providing maximum battery life.1. Adjust the display brightness2. Back-lit key demoInstructionKey StrokesSwitch the screen brig
12、htness state from automatic to manual.SYS, Brightness ManRotate the knob to adjust the display brightnessSwitch the screen brightness state back to automaticSYS, Brightess AutoCover the light sensor with your finger and watch as the display brightness adjusts automaticallyInstructionKey StrokesSwitc
13、h the back-lit keys state to auto.SYS, KeyBackLightCover the light sensor with your finger and watch as the back-lights come on.Switch Back-lit keys state to man, and adjust the back-lit keys brightnessSYS, KeyBackLight, BackLight Man, High Off MedSet the automatic turn off time interval so the back
14、-lit keys shut off if there is no operation.SYS, KeyBackLight, AutoOffTimer, 5 Sec, 10 Sec5Section 2 Save/Recall Setups and ResultsA key feature of the Agilent N9340B Handheld spectrum analyzer is the easy-to-use file system. Besides the 16 MB internal memory storage space, Agilent N9340B also allow
15、s you to save files to an external USB memory device, such as a USB memory stick.The analyzer has the following seven types of file: CSV(*.CSV)Records the trace data. Pattern (*.PTN)Records the limit line settings. Screen (*.JPG)Records the current screen. Setup(*.SET)Records the current system sett
16、ing information. Spectrum Mask (*.MSK)Records spectrum mask settings. State (*.STA)Records the current controls and settings of the analyzer. Trace (*.DAT)Records the data of current trace and controls.In this section, the state of the instrument is saved to a filename of your choice so that it can be recalled for use in later sections.1. Save a state file to local memoryInstructionKey StrokesCall up the
