stupid的博客

Tektronix最近推出了原本应用在其实时频谱仪上的软件SignalVu，从而使得其带宽最高达20GHz的示波器摇身一变成为实时频谱仪，这是继Agilent的89601A矢量信号分析软件进驻示波器以来，另一示波器厂商推出的示波器版本的无线信号分析软件。比起频谱仪中实时带宽最高的RSA6100也不过110MHz，Agilent的PSA为80MHz,示波器的实时带宽要大的多，最高达20GHz。如今SignalVu 和89601A应用于示波器，使得示波器首次具有了无线信号的分析能力。由于示波器的带宽高达20GHz，可以直接捕获目前任意一种常见无线信号，并对其展开时域，频域的分析，更难能可贵的是高端示波器大多支持4个通道，这也是频谱仪所不及的。

但值得注意的是比起真正的频谱仪，示波器的动态范围仍然显得很窄，而且灵敏度也只有1mV(大约相当于-47dBm),底噪2mV(大约相当于-44dBm),也就是说无线要有足够的功率，示波器才能捕捉得到。虽然示波器比起真正的频谱仪来还有很大差距，但由于不用下变频，示波器具有传统频谱仪远远不及的实时带宽，这样对于以往只能在频域分析的无线信号无疑多了一种分析手段。由于示波器具有了这些突出优点，只要能在动态范围，灵敏度等方面做出改善，相信随着FFT运算速度的不断进步，以往只用于时域分析的示波器也会在频域分析领域大显身手。如此以来示波器就进入了无线领域，无疑会大大提高示波器的应用范围。

US suggested pricing starts at $3490 for scope models in the DPO7000 Series and $4990 for those in the DPO/DSA70000 Series.

SignalVu vs 89601A 界面对比

SignalVu

89601A

SignalVu™ Features & Benefits

Trigger

Integrated RF signal analysis package lets you take full advantage of oscilloscope settings
Pinpoint triggering offers over 1400 combinations to address virtually any triggering situation

Capture

Direct observation of microwave signals to 20 GHz without need of an external down converter
All signals up to the analog bandwidth of oscilloscope are captured into memory
Customize oscilloscope acquisition parameters for effective use of capture memory
Four channel acquisitions help you correlate independent RF events
Apply custom math and filtering to acquisition channels

Analyze

Extensive time-correlated, multidomain displays connect problems in time, frequency, phase, and amplitude for quicker understanding of cause and effect when troubleshooting
Power measurements and signal statistics help you characterize components and systems: ACLR, Multicarrier ACLR, Power vs. Time, CCDF, OBW/EBW, and Spur Search
Advanced Signal Analysis Suite (Opt. SVP) – Automated pulse measurements including rise time, pulse width, and pulse-to-pulse phase provide deep insight into pulse train behavior
General Purpose Digital Modulation Analysis (Opt. SVM) provides vector signal analyzer functionality
Tektronix OpenChoice® makes for easy transfer to a variety of analysis programs such as Excel and Matlab

Applications

Wideband Radar and Pulsed RF signals
Frequency Agile Communications
Broadband Satellite and Microwave Backhaul Links

SignalVu™ Vector Signal Analysis Software for DPO7000 and DPO/DSA70000 series oscilloscopes
Wideband Signal Characterization

SignalVu vector signal analysis software helps you easily validate wideband designs and characterize wideband spectral events. By combining the signal analysis engine of the RSA6100A real-time spectrum analyzer with that of the industry’s widest bandwidth digital oscilloscopes, designers can now evaluate complex signals up to 20 GHz without the need of an external down converter. You get the functionality of a vector signal analyzer, a spectrum analyzer, and the powerful trigger capabilities of a digital oscilloscope — all in a single package. Whether your design validation needs include wideband radar, high data rate satellite links, or frequency hopping communications, SignalVu vector signal analysis software can speed your time-to-insight by showing you time variant behavior of these wideband signals.

SignalVu is an integrated software application for DPO7000 and DPO/DSA70000 series digital oscilloscopes. Users can easily switch between the SignalVu application and the oscilloscope’s user interface to optimize the collection of wideband acquisitions.

Trigger

SignalVu software works seamlessly with the oscilloscope allowing users to utilize all of its powerful triggering capabilities. The ability to trigger on time and amplitude-varying events of interest is paramount in wideband system design, debug and validation. The DPO7000 and DPO/DSA70000 series’ Pinpoint trigger system allows selection of virtually all trigger types on both A and B trigger events whether they be transition, state, time, or logic qualified triggers. Once triggered, SignalVu processes the acquisition for analysis in multiple domains.

Powerful oscilloscope triggers allow the user to capture only the relevant portion of wideband signals. Pinpoint trigger functions such as combining A and B events with Edge with Holdoff can capture a pulse train during a specific transmitter mode of operation


Capture

Capture once – make multiple measurements without recapturing. All signals in an acquisition bandwidth are recorded into the oscilloscope’s deep memory. Up to four channels can be captured simultaneously; each of which can be independently analyzed by SignalVu software. Users can also apply math functions to the acquisition prior to SignalVu’s analysis. Acquisition lengths vary depending upon the selected capture bandwidth – up to 12.5 ms can be acquired on a single channel with the DPO7000 series and up to 5 ms can be captured on a single channel with the DPO/DSA70000 series. Significantly longer capture times can be realized with lower oscilloscope sample rates.

Once captured into memory, SignalVu provides detailed analysis in multiple domains. The spectrogram display (left panel) shows the frequency of an 800 MHz wide LFM pulse changing over time. By selecting the point in time in the spectrogram during the on-time of the pulse, the chirp behavior can be seen as it sweeps from low to high (lower right panel).


Analyze

SignalVu vector signal analysis software utilizes the same analysis capabilities found in the RSA6100A series real-time spectrum analyzers. SignalVu advances productivity for engineers working on components or in wideband RF system design, integration and performance verification, or operations engineers working in networks, or spectrum management. In addition to spectrum analysis, spectrograms display both frequency and amplitude changes over time. Time-correlated measurements can be made across the frequency, phase, amplitude, and modulation domains. This is ideal for signal analysis that includes frequency hopping, pulse characteristics, modulation switching, settling time, bandwidth changes, and intermittent signals.

SignalVu can process acquisitions from any one of the four available oscilloscope inputs. Math functions applied by the oscilloscope are also utilized by SignalVu allowing users to apply custom filtering prior to vector signal analysis.

Options Tailored for Your Wideband Applications

SignalVu vector signal analysis software is available for all DPO7000 and DPO/DSA70000 series oscilloscopes and offers options to meet your specific application, whether it be wideband radar characterization, broadband satellite, or spectrum management. SignalVu Essentials (opt. SVE) provides the fundamental capability for all measurements and is required for both pulse analysis (opt. SVP) and digital modulation analysis (opt. SVM). Unless otherwise noted, all measurements apply to option SVE.


Example Applications Benefiting from SignalVu Capabilities and Options



Time-correlated, multidomain view provides a new level of insight into design or operational problems not possible with conventional analysis solutions. Here, the hop patterns of a narrow-band signal can be observed using Spectrogram (lower left) and its hop characteristics can be precisely measured with Frequency versus Time display (upper left). The time and frequency responses can be observed in the two right-hand views as the signal hops from one frequency to the next.

The Advanced Signal Analysis package (Opt. SVP) provides 21 individual measurements to automatically characterize long pulse trains. An 800 MHz wide LFM chirp centered at 18 GHz is seen here with measurements for pulses 7 through 18 (upper right). The shape of the pulse can be seen in the Amplitude versus Time plot shown in the upper left. Detailed views of pulse #8’s frequency deviation and parabolic phase trajectory are shown in the lower two views.

Wideband satellite and point-to-point microwave links can be directly observed with SignalVu analysis software and appropriate DPO oscilloscope. Here, General Purpose Modulation Analysis (opt. SVM) is demodulating a 16QAM backhaul link running at 312.5 MSymbol/s