DIGITAL OSCILLOSCOPES & DIGITAL SCOPES

Transcription

1 7004 Digital Oscilloscopes DL4100 (700430) mm 15kg ( 15-11/ / /8" 33.1 lbs) YOKOGAWA introduces a brand new digital oscilloscope with outstanding performance. The DL4100 / DL4200 are equipped with unique 10-bit, 100MS/s A/D converters in each channel. When compared with a conventional digital oscilloscope with 1K word record length and 8-bit A/D converters, the DL4100 / DL4200 give you 100 times better horizontal resolution and 4 times better vertical resolution. EMI Standard ; EN55011 Group 1 Class A Immunity Standard ; EN : K word record length and fast signal processing permit faithful display of waveforms FEATURES 100MS/s, 10-bit A/D converter and ±1% DC accuracy permit high accuracy measurements AM signal observation 3.5-inch FDD and SCSI interface (option) ensure effective use of the captured waveform Split display mode

2 ACCURACY MAKES THE DIFFERENCE IN MEASURE- MENT RELIABILITY Oscilloscopes in general have ±2 to 3% DC accuracy. This accuracy is based on the full scale setting of the voltage range and not on the input voltage. Let's assume that a square wave signal of 5V max with a 2.5V offset voltage is measured by a digital oscilloscope. Figure 1 on the right shows this signal as observed by the DL1200A at a 2V/div range. Since oscilloscopes have 8 divisions in vertical axis, full scale of the setting is 16V. The measured value in figure 1 has an error of ±3%, which in this case is equal to ±0.48V. If you calculate this error using the input as the basis, this is approximately 10% of the input voltage. The error will become bigger as the displayed amplitude become smaller against full scale. A SPLIT DISPLAY MODE GIVES HIGH ACCURACY MEASUREMENTS ON MULTIPLE CHANNELS You may tend to display waveforms with small amplitude if more than 2 channels are used as shown in Figure 1. The error based on the input signal becomes bigger as the displayed waveform amplitude becomes smaller against the full scale. The DL4100 / DL4200 support a split display mode. Figure 3 shows a 4-channel observation using the split display mode. In this mode, each area represents a full scale of the corresponding input. With the split display mode, you can observe multiple signals with full scale without overlapping the waveforms. Fig. 3 The Split Display Mode by The DL4100 Fig. 1 Signal Observation by The DL1200A TO ACHIEVE HIGH ACCURACY MEASUREMENTS, THE DL4100 / DL4200 HAVE ORIGINAL 100MS/S, 10-BIT A/D CONVERTERS An A/D converter is the key component of digital oscilloscopes. YOKOGAWA developed this A/D converter for the design of a general purpose, high accuracy digital oscilloscope. (Figure 2) The 100MS, 10-bit A/D converter incorporated in the DL4100 / DL4200 ensure ±1% DC accuracy. This accuracy has not been realized by 8-bit A/D converters. Fig. 2 Original 100MS, 10-bit A/D Converter AUTOMATIC SELF-CALIBRATION ENSURES HIGH ACCURACY MEASUREMENTS AT ALL TIMES Operational characteristics of electronic components are subject to change with operating temperature. Digital oscilloscopes execute self calibration at power on. However, the internal temperature continues to increase until it reaches a temperature equilibrium state. (approx. 30 min. after power on) To measure a signal with high accuracy, you need to execute self-calibration when the internal temperature changes. You also need to watch the external environmental temperature, because these changes also affect the internal temperature of the instrument. In short, to obtain reliable measurement results from a digital oscilloscope, you have to pay attention to the internal temperature of the instrument. The automatic self-calibration feature of the DL4100 / DL4200 execute self-calibration frequently until 30 minutes after power on and every 30 minutes afterwards. This autocalibration is initiated only when settings like Time/div are changed. Therefore, observation of a waveform is not disturbed. The self-calibration itself requires a couple of seconds, so you do not have to wait for a long time whenever it is executed.

3 RECORD LENGTH MAKES A SIGNIFICANT DIFFER- ENCE IN REPRESENTATION Figure 4 on the right shows an AM modulated signal captured by the DL4100 / DL4200. These picturtes show the same signal captured with different record lengths. With a 1K word record (far right), the waveform is distorted. With a 100K word record, the whole image is displayed without distortion (right). The DL4100 / DL4200 with 100K words per channel ensure a faithful representation of your signals. incoming signal Observed by a digital oscilloscope with fast update rate Captured with 100K words Fig. 5 Observed by a digital oscilloscope with slow update rate Effect of Display Update Rate on Singal Observation Fig. 4 Captured with 1K words AM Modulated Signal Observation A FAST DISPLAY UPDATE RATE REVEALS ABNORMAL SIGNALS You can not observe a continuous signal with an oscilloscope. Part of the signal is lost in the oscilloscope dead time. When an abnormality occurs during this dead time, an oscilloscope will not display it. Figure 5 shows the advantage that a fast update rate oscilloscope has over a slower update rate. This fast update rate not only means that you can monitor a signal fast, but also that you are much more likely to see an abnormality in a signal when it happens. Figure 6 shows the display update rate of the DL4100 / DL4200 in a given processing mode. It should be noted that unlike other digital oscilloscopes, the DL4100 / DL4200 process signals in each channel in parallel, so the display update rate is not be affected by the number of channels in use. The DL4100 / DL4200 show a faithful representation of your signal with a high speed update rate. Normal Average Digital Filter Envelope +,, arithmatics Roll mode Fig. 6 10K word use 100K word use NA Display Update Rate in Various Processing Modes USE OF FD OR MO (OPTICAL DISK) PLACE A DISPLAY IMAGE IN A WORD PROCESSOR DOCUMENT Incorporation of an oscilloscope display hard copy into a report has been a time consuming process. You had to obtain a plotter, connect it to the oscilloscope, plot out the display image and glue the output into the document (perhaps after adjusting the size with a copier ). Use of a FD drive or external MO drive connected by the SCSI interface (option) facilitates documentation. As shown in Figure 7, you can place a display image in a word processor document. The formats supported by the DL4100 / DL4200 and typical word processors that accept these formats are listed below. Supported format. TIFF(*1), BMP(*1), PostScript*, HPGL* *1) Supported with the optional printer Word processor Windows* environment MS word*, Ami PRO*, Word Perfect* Macintosh* System 7 environment MS word*, Word Perfect*

4 Fig. 7 The Display Image Incorporated in MS Word* Fig. Use of Lab View* STORE MEASUREMENT RESULTS IN HIGH CAPACITY MO When an experiment is carried out using large scale devices or in a remote location, you would like to obtain as much data as possible at the site and analyze the signals later. The SCSI interface option of the DL4100 / DL4200 are used to connect an MO drive of up to 230MB. If 100K word record length is used simultaneously on 4 channels of the DL4100 / DL4200, it takes more than 800K Byte to store one acquisition. With the 230MB MO drive, more than 200 acquisitions can be saved even if 100k word are used on every channel. In combination with the Save On Trigger function ( saving every acquisition into FD or MO ) and the MO drive, you can record a signal without human intervention over a long period of time. Furthermore, you can combine the automatic waveform judgement function (GO/NO-GO function) and MO drives. Until now, large volumes of data from an instrument were handled by using communication port like the GP-IB. With a MO drive, it is easy to handle large volumes of data. Fig. 10 FUNCTIONS Use of a Color Plotter VERSATILE TRIGGER FUNCTIONS EASE TROUBLE- SHOOTING Window trigger You define an upper and lower level threshold. The trigger occurs when the signal crosses one of the defined levels. Fluctuation of a load on electric devices can affect to voltage level. With the window trigger, you can trigger on voltage level fluctuations. Fig. 8 Use of a 230MB MO Drive INTEGRATE THE DL4100 / DL4200 INTO A SYSTEM OR OBTAIN HARD COPY PLOTS USING THE GP-IB When you want to configure a measurement system using a couple of instruments, or apply advance analysis functions, you can use measuring software like the Lab View* on the PC or EWS. (Figure ) When you would like to have a color plot of waveforms, you can use HPGL* compatible color plotters. (Figure 10) Window trigger definition Window trigger measurement example

5 Pattern trigger By assigning Low or High threshold levels for each input, you can trigger on a combination of signals. You can assign one signal as a clock source. OR trigger When one of the predefined edge trigger or window trigger conditions is satisfied, the trigger occurs. H Ch1 L Ch2 Ch3 Trigger point Pattern trigger definition Ch1 Window Ch2 Ch3 Trigger OR trigger definition OR trigger measurement example Pattern trigger measurement example A B(n) trigger The A B(n) trigger is a sequential trigger function. A and B trigger conditions can be defined separately. The figure on the right is an example where the edge trigger is assigned as the A condition and the pattern trigger is assigned as the B condition. The trigger occurs when the B trigger condition is satisfied n times after the A trigger condition is satisfied. The following trigger can be used as the A or B trigger. Ch1 signal Ch2 signal Ch3 signal Ch4 signal A trigger is satisfied B trigger is satisfied time Pulse width trigger When a pulse width become narrower or wider than the defined width, a trigger occurs. By using the pulse width trigger, you can trigger on a glitch. TV trigger Triggering on NTSC, PAL, HDTV signals is accomplished by assigning a line number. ZOOM FUNCTION Data which has been captured in the long record length of the DL4100 / DL4200 can be magnified on the CRT (far right) or on the optional thermal print paper (right). You can see details of a captured waveform with the Zoom function. H Ch1 A condition L Ch2 Edge Pattern H Ch3 TV Ch4 B condition Edge Pattern OR Ch4 Trigger Long copy example Zoom on the CRT Upper: a captured waveform Lower: a magnified portion

6 FILTER/ AVERAGING The digital filter reduces the noise component of a signal and increases vertical resolution by 1 bit. For a repetitive signal, the averaging reduces the noise component and increases vertical resolution by up to 5 bits. SEQUENTIAL STORE FUNCTION [SINGLE(N)] 100K word record length of the DL4100 / DL4200 can be split into up to 100 segments. These segments can be used to record the changes of an incoming signal. 1st acquisition 2nd acquisition Nth acquisition Sequential Store Concept Before averaging ROLL MODE This mode becomes active when the Time/div is slow. When it is active, a signal is displayed on the CRT just as a recorder records a signal on its chart paper. Thanks to high speed processing, the mode is available even if the entire record of the 100K words is used. AUTOMATIC PARAMETER MEASUREMENT Waveform parameters can be measured automatically with this function. The DL4100 / DL4200 allow you to measure parameters of several signal sources simultaneously. (e.g. measuring max. voltage of Ch1 and Ch2 signals. ) After averaging GO/NO-GO FUNCTION The function automatically judges whether waveforms on the display conform to predefined conditions. Waveform zone or parameters can be used as the basis of the judgement. When the NO-GO condition is satisfied, the waveform can be printed by the optional printer or saved to FDD or SCSI devices. Control signals can be transmitted as well. GO/NO-GO based on Zones SPECIFICATIONS Vertical Number of channels: 4 Vertical resolution: 10 bit (normal) (100 LSB/div) 11 bit (digital filter) 15 bit (after 812 times averaging) Maximum sampling rate: Normal 100 MS/s Equivalent 50 GS/s Effective storage frequency: Repetitive signal DC to 150 MHz (DL4100) (-3dB) DC to 300 MHz (DL4200) Single shot DC to 40 MHz Sensitivity: 2mV/div(* 2 ) to 5V/div DC accuracy(* 1 ): ±(1% of 8 div + offset voltage accuracy) Offset voltage accuracy:±(0.02% of offset voltage range + 1% of setting) Offset voltage range: ±100 V: 5 to 1 V/div, (at 1:1 attenuation) ±10 V: 500 to 100 mv/div, ±1V: 50 to 2 mv/div Interchannel isolation: 40 db ( typical. between the same range) Maximum input voltage: 250 V DC + AC peak Input impedance: 1 MΩ ± 1% (approximately 16pF), 50 Ω ±1% * 7 Input coupling: AC / DC / GND / 50 Ω * 7 Horizontal Sweep time: 2 ns/div to 50 s/div Time axis accuracy: ± (0.005% ps) * 3 Record length: 100 K words/ch External clock input: EXT CLOCK IN input 40 Hz to 30 MHz * 4 CH4 IN 40 Hz to 40 MHz * 4 GO/NO-GO based on Parameters Trigger Mode: Auto / Autolevel / Normal / Single / Single(N) : sequential store Source: CH1 / CH2 / CH3 / CH4 / LINE / EXT Slope: Rise / fall / rise and fall Coupling: AC / DC Sensitivity: 1 div p-p ( for specified frequency range ) Functions: Edge OR Edge, Window

7 Pattern High, Low, CLOCK Pulse width Wider, narrower than the predefined TV * 6 NTSC / PAL / HDTV A B(n) A condition: edge / pattern / TV B condition: edge / pattern / OR Ext. trigger input: Range ±10 V Trigger level 1.5 V / 0.15 V Band width DC to 30 MHz Display update rate 1 channel use: Max. 60 displays / s 4 channel use: Max. 60 displays / s Extension functions Computation: +,, x, FFT (1000 point power spectrum) GO/NO-GO function: Zone mode: Up to 4 traces are judged simultaneously. Parameter mode: Combination of up to 5 parameters are allowed. Automatic waveform parameter measurment: Max. 27 items for each trace. Parameters of up to 4 traces can be measured. All the selected parameters can be measured. Display image save: HPGL, PostScript, Tiff * 5 and BMP * 5 are supported. Display CRT: 10 inch, raster scan type, amber color Display trace number: Max. 8 traces ( in Zoom mode. ) 4 captured traces and 4 magnified at the same time FDD Size: Support disk type: Format: 3.5 inch 640, 720 KB / 1.2, 1.44 MB Compatible with MS-DOS* SCSI interface (option) Supported hard disk drive: SCSI HDD that can be formatted by the EZ-SCSI* Supported MO drive: 3.5 inch, 230 MB drives that can be formatted by the EZ-SCSI* Communication GP-IB: Conforms to IEEE st'd Singal input / output TRIG OUT: TTL level singal GO/NO-GO function control signal: START IN, GO OUT, NO-GO OUT (TTL level signals) Calibration signal: 1 khz, 1Vp-p, square waveform CH1 OUT (option) Output level: 20 mv/div ± 20% (50 Ω ) Band width: DC to 50 MHz Built-in printer (option) Printing system: Thermal line dot method Dot density: 6 dots/mm Paper width: 112 mm * 1 : Standard operating conditions (23±2 C, 55±10% RH ) Calibration after 30 minutes warm-up * 2 : 2 mv/div realized by zooming * 3 : Standard operating conditions (23±2 C, 55±10% RH ) After 30 minutes warm-up * 4 : Continuous clock required * 5 : Optional built-in printer required * 6 : Supported in Ch1 only * 7 : 50 Ω input is supported in the DL4200 only STANDARD ACCESSORIES Power cable... 1 pc Rubber pads to prevent rear leg slippage... 2 pads Probes... 2 pc Manuals... 1 set AVAILABLE MODELS Model Power cable Options SPARES No Suffix code -D -F -S -R /B5 /C6 /D1 /E1 /E2 Item Roll chart 150 MHz voltage probe 300 MHz voltage probe DIMENSIONS Description DL4100 Digital Oscilloscope DL4200 Digital Oscilloscope UL, CSA standard VDE standard BS standard SAA standard Built-in printer SCSI interface CH1 OUT 2 additional 7006 probes 2 additional 7007 probes Code B850NX Description 30 m 10 MΩ (10:1), 1.5m 10 MΩ (10:1), 1.5m Order q ty General specifications Operation temperature range: 5 to 40 C Operation humidity range: 20 to 85 RH (when not using the printer) 35 to 85 RH (when using the printer) Power supply voltage: 0 to 132 V AC / 18 to 264 V AC (automatically switched) Power supply frequency: 48 to 63 Hz Power requirement: 450 VA max External dimensions: Approx. 38 (W) 220 (H) 427 mm (D) (except handles and projections) Weight: Approx. 15 kg <> Unit : mm (inch)