ELAN Home Systems ES370 Uživatelský manuál

ELAN DIGITAL SYSTEMS LTD. LITTLE PARK FARM ROAD, SEGENSWORTH WEST, FAREHAM, HANTS. PO15 5SJ. TEL: (44) (0)1489 579799 FAX: (44) (0)1489 577516 e-mail:

Start with the bottom scope. Hold it in one hand, and put the next scope on top of the 1st, the same way around. Align the stacking connectors and w

2.3.3 USB Connections For Stacked Configurations All stacked scopes need a USB connection. A standard hub may be useful for multi-channel stacks to

Repeat this for each channel in the stack to identify them. If you like, you can stop the software, and unplug all the scopes from their USB connecti

2.3.5 Stacking Do’s And Don’ts • Do power off all scopes (remove USB lead) before connecting and disconnecting scopes from the stack • Don’t remove

2.4 Input Ranges The USBscope50 supports 3 settings on its input attenuator. The ranges at the BNC input depend on the type of scope probe used:

2.5 Probe Compensation Before taking measurements with the USBscope50, the attached x10 scope probe must be compensated to ensure that it is matched

2. Set the input range to 0.3V/div, x10 probe and coupling to AC 3. Use the channel tab and click on the “cmp” button to turn on the compensation ou

output12 to achieve a clean waveform with minimal mains “hum” 7. Now, slowly adjust the trimmer in the probe body until you achieve the best square w

2.6 Acquisition Modes The USBscope50 can acquire waveforms in two different ways. The mode and sample interval (i.e. the time between each data poin

2.6.2 Random Interleaved Sampling This mode is a little more complex and is suited only to observing certain types of waveform. The USBscope50 inclu

CONTENTS 1 OVERVIEW... 5 2 ABOUT THE USBSCOPE50 ...

RIS mode is not well suited to very slow input signals or signals that have jitter. This will lead to an uncertainty in the trigger instant and hence

2.7 Trigger Modes The USBscope50 can use three main types of triggering. These modes are used when the “run” button or the “once14” button has been

It is normal for the scope to take several seconds to move from free run to triggered mode when a signal is first applied to the scope input or is cha

2.8 Trigger Position The total sample buffer is 3000 points long. The acquisition can be triggered in Auto and Norm mode from the input waveform. B

Trigger delay is effective in single-shot mode only. Note that setting a large delay will noticeably slow the overall acquisition rate. Also note

2.10 Trigger Threshold You can adjust the trigger voltage that is used for Auto and Norm Modes, either by turning the trigger knob or by clicking on

The full screen plot can be placed on top by simply left clicking it. To pop the scope back on top, click the plot with the right mouse key. The f

2.12 FFT Plot (Spectrum Analyser) Each scope channel can be analysed using a 2048 point Fast Fourier Transform. The plot will be shown in a scalable

2.13 Math Functions The USBscope50 includes two virtual math channels. These channels are generated using the data from two scope channels called A

2.14 Data Export The channel data and FFT data can be saved using the DATA tab. Simply select the channels you wish to save and click the save

4 HARDWARE SPECIFICATION ... 36 4.1 Power Requirements ...

2.14.1 Example Data File There are 3000 sets of numbers, followed by a footer that defined the acquisition mode used. -5.0079 -4.7575 -5.0079 -5.007

2.14.2 Example FFT File There are 1024 sets of numbers, followed by a footer that defined the acquisition mode used. -54.0 -54.0 -54.0 -54.0 -54.0 -

3 SOFTWARE INSTALLATION 3.1 Windows 98SE and Windows Me Before plugging in the hardware: Use the supplied install CD and run the setup program. Th

Once the hardware has installed, there is no need to make any settings for the allocated COM port…the software takes care of all this at run time. S

3.2 Windows 2K and XP17 Before plugging in the hardware: Use the supplied install CD and run the setup program. This will copy all the required fi

Once the hardware has installed, there is no need to make any settings for the allocated COM port…the software takes care of all this at run time20.

4 HARDWARE SPECIFICATION All parameters typical @ 20°C unless otherwise stated 4.1 Power Requirements Supply Voltage: 5.0V ±10% from host U

4.4 Performance 4.4.1 Safety Data and Maximum Ratings Important Safety Precautions Always observe these when using the USBscope50 The USBscope50 con

Isolation rating: 300V CAT II, 500V CAT I between BNC ground and USB ground Transient isolation24: BNC ground to USB ground +/-2.5KV Isolation cap

Elan Digital Systems Ltd. 39 USBscope50 USER’S GUIDE Iss5 4.4.3 Dynamic Performance Maximum ADC sing

Disclaimer This document has been carefully prepared and checked. No responsibility can be assumed for inaccuracies. Elan reserves the right to mak

1 OVERVIEW The USBscope50 is a digital storage oscilloscope that has the following features: • Single channel scope with BNC input and USB PC inte

2 ABOUT THE USBscope50 2.1 General The USBscope50 uses a 50MSample/sec 8-bit A-to-D converter. The A-to-D and front-end circuits that process the i

2.2 USBscope50 Architecture The figure below shows a simplified diagram of the USBscope50. ATTENUATOR1MegCONTROLLERSTACKCONNAC/DCBNCAMPCOMPPSUDATAUS

2.3 Using More Than One USBscope50 A unique feature of the USBscope50 architecture is that up to 4 devices7 can be stacked to make a multi-channel i

Repeat this for all except the last scope to be stacked. For the last scope in the stack, do the same as above but use the short length connector.