Agilent N9342C/N9343C/N9344C HSA Handheld Spectrum Analyzer Demonstration Guide This demonstration guide shows you how to use the basic functions of the N9342C/43C/44C handheld spectrum analyzers (HSAs) and take advantage of their extensive features. The demonstrations apply to all of the HSA models, which are collectively referred to as N934xC HSAs in this document.
Table of Contents Introduction.............................................................................................. Demonstration Preparation................................................................... Panel Tour ■ Front panel.................................................................................. ■ Top panel.................................................................................... Demonstrations ■ Auto-brightness and back-lit keys.........................................
Demonstration Preparation This demonstration provides the step-by step instructions for using the extensive features of N934xC HSAs. Model no. Product type Options E4438C-503 ESG vector signal generator All demonstration key strokes surrounded by [ ] indicate front panel hard keys and key strokes surrounded by { } indicate soft keys on the right edge of the display.
Panel Tour Front panel 14 13 12 11 10 9 8 7 6 1 No.
Panel Tour (continued) Top panel 12 1 No. 2 3 11 10 4 9 5 8 6 7 Caption Function 1 External DC power connector Provides input for the DC power source via an AC-DC adapter, or automotive type DC adapter.
Demonstration 1 Auto-brightness and back-lit keys Communication system maintenance and repair often require a technician to troubleshoot in bright daylight or in the darkness of night. The light sensor on the front panel of the N934xC HSA senses the ambient light and automatically adjusts the brightness of the display and the back-lit keys. The user can also manually set the brightness of the display, and the brightness of the back-lit keys, so they can be seen clearly even in any light.
Demonstration 2 Measurement basics: frequency, span, amplitude The key measurement setup parameters of a spectrum analyzer are: • Frequency Adjust the frequency range measured Instructions for the source Keystrokes for the source Set 2 GHz center frequency, amplitude -10 dBm, CW signal [Preset], [FREQ], [2], {GHz}, [AMPTD], [-10], {dBm}, [RF On] Instructions for HSA Keystrokes for HSA • Amplitude Adjust the view of the signal’s level Tune the center frequency to 2 GHz [Freq], [2], {GHz} [Span], [10
Demonstration 3 Save, recall, and the unique User key The N934xC HSAs let you save the state, trace data, measurement results (peak and marker table), limit lines, and screen captures to an internal file, a USB drive, or remotely via LAN or USB. The N934xC HSAs provide a dedicated Save button to let you save a file quickly with a single button press.
Demonstration 4 GPS The HSA has a built-in GPS receiver and antenna (Option GPS). In addition to the internal antenna, the HSA also supports the external GPS antenna (Option GPA), providing convenience in the field. You can save measurement results with GPS location data (latitude, longitude, and altitude). In this demonstration, we will show how to use the N934xC HSA`s GPS feature.
Demonstration 5 Task planner Task planner is a unique tool provided with N934xC HSA as an optional feature. It’s easy to sequentially execute many pre-defined measurements, log results, and generate reports automatically. Step 1: Create a task plan file (.TPF) Action 1: Save state file Instructions for HSA Keystrokes for HSA The measurement modules which task plan supports include: SA, ACP, CHP, and OBW. One task planner file (*.tpf) can execute up to 20 test tasks.
Demonstration 5 Task planner (continued) Action 2: Compile task plan file (.TPF) with the free N934xC HSA PC software Figure 5. Connect to the N934xC HSA Instructions for HSA Keystrokes for HSA Make sure the Agilent I/O library and the N934xC HSA PC software are correctly installed.
Demonstration 5 Task planner (continued) Action 2: Compile task plan file (.TPF) with the free N934xC HSA PC software Instructions for HSA Keystrokes for HSA Edit the task list As shown in Figure 9, the task list can be easily edited: • Click and to move up or down the file • Click to delete task files • Click • Double click the selected task file to rename the selected task Figure 9. Task list Figure 10.
Demonstration 5 Task planner (continued) Figure 11. Task plan running mode Figure 12. Test measurement result (manual mode) Instructions for HSA Keystrokes for HSA Edit the task plan description, running mode, and save the task plan • Input “This task is used to do W-CDMA BS RF verification” as the task plan description • Select “Auto” as the running mode • Click “Save as” and save this file as:“W_CDMA. tpf”.
Demonstration 5 Task planner (continued) There are two ways to transfer the task plan file to the N934xC HSA: via a USB flash drive or using the N934xC HSA PC software. In this example we will use N934xC HSA PC software to transfer the task plan file to the N934xC HSA. Figure 13. Data transfer Figure 16. Task plan measurement result Step 2: Transfer the task plan file to the HSA Figure 14. Disconnect Figure 15.
Demonstration 5 Task planner (continued) Step 3: Run task planner Figure 17. Channel power measurement result Figure 18.
Demonstration 6 Spectrum monitoring and interference hunting Option SIM provides a spectrogram that provides a three-dimensional display of the spectrum with power over frequency and time. This feature helps find intermittent interference signals, as well as locate and identify unwanted signals that cause dropped calls and poor quality service in communications systems.
Demonstration 7 Remote control via LAN or USB port In order to keep a communication system working reliably long term, you need to monitor the spectrum routinely. Regular spectrum monitoring is usually accomplished automatically by using remote control software to drive the spectrum analyzer. You can remotely control the HSA using SCPI commands over LAN and USB, or use the HSA PC software to monitor spectral changes. There are two modes that are used to set up the HSAs’ LAN IP address: static and DHCP.
Demonstration 9 Advance marker functions The N934xC HSAs provide powerful marker functions. In addition to normal and delta marker modes, the instrument marker system provides noise markers, frequency counter markers, AM/FM tune and listen, and band power measurement. For the AM/FM tune and listen feature, the AM/FM demodulated audio can be heard with the internal speaker or the provided headphone. Speaker volume and delay time can be adjusted to meet your specific needs.
Demonstration 10 Limit lines and limit masks The N934xC HSA offers two different limit lines. Limit lines/limit masks and associated margins allow you to quickly and easily identify signals that do not meet specified requirements. In this demonstration, we will create a limit line and perform a pass/fail test. Figure 23. Limit lines Instructions for the source Keystrokes for the source Connect the source output to the HSA input.
Demonstration 11 Multiple traces and simultaneous detectors The N934xC HSA has a total of four traces and supports simultaneous detectors including peak, average, sample, negative peak, and the normal detector. Plus the N934xC HSA supports simultaneous detectors, meaning that different detectors can be used on four different traces in a single sweep—this will greatly increase the throughput to measure crest factor of pseudo-noise signals, as well as amplifiers.
Demonstration 12 Trace math functions The math functions in the N934xC HSA are true power calculations, meaning that the measurements are converted to power, the math function is performed, and the results are displayed in dBm. In this demonstration, we will subtract -6 dBm from 0 dBm and the result will be -1.2 dBm. In order to get the correct results, the source should be adjusted to as close to the required power as possible as shown by the analyzer marker: • 0 dBm = 1 mw • -6 dBm = 0.25 mw • -1.
Demonstration 13 Tracking generator In many cases, stimulus response characteristic measurements are important. A spectrum analyzer equipped with a tracking generator forms a stimulus response measurement system that can easily perform scalar component test with high dynamic range (due to the spectrum analyzer’s tuned receiver architecture and narrow IF bandwidths). The Agilent N924xC HSAs each have an optional highperformance, built-in tracking generator (Option TG7) (frequency range from 5 MHz to 7 GHz).
Demonstration 14 Power meter The Agilent U2000 Series USB power sensor works with the N934xC HSA to provide high accuracy average power measurement. The frequency range for power measurements is from 9 kHz to 24 GHz and power levels from -60 dBm to +20 dBm at a measurement speed of up to 1,000 readings per second in buffered mode. The N934xC HSA provides power to the sensor and retrieves measurement results over USB.
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