• DL7440: 4 analog channels and 16-bit logic input
• DL7480: 8 analog channels and 16-bit logic input

  The DL7400 Series includes 4 and 8-channel analog input models. Each model has up to 16-bit logic inputs as standard. All these inputs come in a convenient, benchtop-sized instrument. In additon to capturing up to 16 logic signals, the DL7400 Series lets you simultaneously measure up to 8 analog signals without needing to synchronize two separate oscilloscopes. The DL7440 and DL7480 SignalExplorer oscilloscopes are designed for users who want an easy, efficient solution in one unit for handling measurements that required two or more units in the past.

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. 

• 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.

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

Measure and display how parameters change for each
waveform period

• 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

• 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.

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.

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

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.

Three serial bus analysis functions (I²C, CAN, and SPI) are available together "in one instrument."
These options provide physical-layer observation and analysis of serial bus signals. Evaluations from such analyses are essential to solve communication failures resulting from signal deterioration and unpredictable external noise.

I²C bus signals (SCL and SDA), used extensively in home electronics such as analog and digital televisions, and video cameras, and in communications equipment such as mobile phones can be captured with specialized triggers and displayed as waveforms. Triggers can be based on start conditions, userspecified address and data patterns (Data 1 and Data 2), non-ack (when acknowledgement is not received), and other conditions for reliable capturing of I²C signals. You can also set triggers based on combinations of I²C bus trigger conditions (SCL and SDA) and signal inputs on channels 3-8 (combination triggers).
Captured waveforms can be analyzed in a time-series manner, and the analysis results at each byte is displayed in a list along with the presence/absence of ACK field codes. When an analysis result is selected with the cursor, the corresponding portion of the waveform is automatically enlarged in the zoom area.
You can quickly search the analyzed results for a specific address or data pattern from within the analysis results.
Two pairs of I²C busses can be input at the same time (SCL: CH1 & CH3; SDA: CH2 & CH4), and then analysis can be performed alternately on either bus.

Signals in the SPI bus, a synchronous 8-bit serial bus widely used for inter-IC and data communication in embedded systems and in other applications, can be captured using dedicated triggers. The captured results are then analyzed based on the SPI protocol and
can then be displayed together with the waveform.
Triggers are activated on user-defined conditions of the MOSI (master output slave input) and/or MISO (master input slave output) data signals on the SPI bus. Data strings of 1-8 bytes can be defined.
Two types of trigger patterns can be set (A pattern, B pattern, or both), allowing a trigger to be activated, for example, upon data read out from the slave (MISO, pattern B) in response to a specific command from the master (MOSI, pattern A).
Data analysis results and SS (slave select) bits can be displayed in a list together with the waveforms.
After analyzing the acquired data, you can perform high speed searches for a specific MOSI or MISO data pattern (1-8 bytes).