Digital Oscilloscopes DL7440/DL7480

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Features (1)	Features (2)	Simple and Enhanced Triggers	Power Analysis Functions
Serial Bus Analysis Functions	Connecting with PC via WebDAV	Rear Panel

A Variety of Optional Functions to Provide you a Best Solution for your Application

Power Analysis Functions (with the /G4 option)¹

Easy, automatic calculation of power supply parameters including: switching loss, power, power factor, impedance, energy, and more.

Automatic parameters available
on voltage channels

From the main power analyze setup menu, you can select which channels will be used for power measurements. For each channel selected, you can choose from a number of waveform parameters specific to power analysis. (For example, I²t can be calculated for fuse measurements). Additionally from the main power analyze setup menu, you can jump to the Auto Deskew function or the Power Analysis Math and Parameter Measurement menus.

1 The Power Analysis Functions (/G4 option) includes the User-Defined Math (/G2 option).

Measure and display how parameters change for each waveform period

Fluctuations in waveform parameter values of acquired signals are displayed on a plot. For example, on an active power factor correction circuit, you can simultaneously display fluctuations in the switching frequency and switching current of the modulating signal relative to the commercial power supply and input voltage. Also, you can measure commercial power supply voltage and current and then display the trend of power consumption over each cycle.

You can measure commercial power supply voltage and switching voltage/current in active power correction circuits, and also plot fluctuations in switching frequency and switching current.

Harmonic analysis of the power supply current allows for easy comparison to EN61000-3-2 standards ²

Analysis Results Display and
List Display

Limit values based on EN61000-3-2 class A, B, C, and D can be superimposed with measured data. Limit values and numeric data values are displayed together in a list. Data exceeding the limit value are flagged.

2 You can use the DL7400 for pre-complaince testing.
Use Yokogawa's WT2000 Digital Power Meter for standards compliance testing.

Easily adjust the skew between voltage and current probes

Adjust for differences in electrical length (skew) between voltage probes and current probes.
This is useful for switching loss measurements and other measurements affected by voltage/current signal skew. Deskew can be performed automatically or manually for each channel.

Deskew signal source (701935) Output voltage: Approx. 0 to 5 V Output current: Approx. -100 to 0 mA Output freq.: Approx. 15 kHz Falling time: Approx. 15 nsec

	701921 100 MHz Differential Probe	701933 50 MHz Current Probe

User-Defined Math (with the /G2 option)

The DL7440 and DL7480 include addition, subtraction, multiplication, binary conversion, inversion, differentiation, integration, and power spectrum as standard calculation functions. With the optional user-defined calculations, you can define equations using arithmetic calculations as well as a variety of other functions, including trigonometric functions, differentials, integrals, square roots, digital filters, six different FFT functions, and pulse width calculations. In addition, calculation results can be specified as parameters for other equations, so the DL7440 and DL7480 can directly handle complex computations that formerly required data to be uploaded to a PC for computation.