Siglent Launched Handheld Digital Oscilloscope SHS800 and SHS1000
Shenzhen Siglent Technology Co., Ltd. launched a new high-performance handheld oscilloscope SHS800 series to the market, with 1GSa / s real-time sampling rate and 2M memory depth.
- (1888PressRelease) January 17, 2013 - Siglent launched handheld digital oscilloscope SHS800 and SHS1000 series. There is a big price gap between the SHS1000 series and the SHS800 series. With the same 1G sampling rate, 60/100MHz bandwidth, 2M memory depth, why there is a price gap between these two series handheld oscilloscope?
In fact, the answer is reflected in the name: Isolation Handheld Oscilloscope SHS1000 series and Handheld Oscilloscope SHS800 series, the key lies in the word "isolated". These are mentioned in details in the Isolation Handheld Oscilloscope SHS1000 series:
Isolation security level between the oscilloscope channels: CATII 1000V, CATIII 600V
Security level between the oscilloscope channels and earth: CATII 1000V, CATIII 600V
From the description above we can see that SHS1000 embodies the "floating" and "isolation" concept particularly, but the SHS800 is not.
The traditional oscilloscopes are the structure shown in the right figure. In this structure, in multi-channel measurements, all the input signals must have the same voltage reference, and the shared default reference is the "earth". If there is no differential preamplifier or external signal isolator, this traditional desktop oscilloscope is not suitable for floating measurements. Comparing the isolation oscilloscope and the traditional oscilloscope, the isolation oscilloscope's internal voltage references are not connected together, so that each reference point of the input channels must be connected to the reference voltage.
There is not real ground reference level of the handheld oscilloscope, so as shown above, ground reference for the various modules belongs to virtual ground, and reference voltage of the oscilloscope channel directly relies on input voltage of the probe's clip.
Comparing SHS1000 and SHS800, the main difference lies in function "isolation". SHS1000 can be used for perfect floating ground measurements and dual-channel independent differential measurements without disturbing each other, these advantages are not comparable to ordinary oscilloscope. SHS1000 has been greatly extended in applications, and can meet the test and measurement requirements of many special cases. At present, just several international brand manufacturers have developed this technology and successfully applied it to the products, such as Fluke, Tektronix, Agilent, CHAUVIN ARNOUX, etc. And Siglent's isolation handheld oscilloscopes were brought to market ahead of Tektronix, Agilent. Siglent currently is the only Chinese company able to launch similar products.
When it comes to isolation, let me introduce the definition rules of CAT (overvoltage category), as shown below:
Operating voltage Peak instantaneous voltage Test resistor
CAT I 600V 2500V 30Ω
CAT I 1000V 4000V 30Ω
CAT II 600V 4000V 12Ω
CAT II 1000V 6000V 12Ω
CAT III 600V 6000V 2Ω
CAT II 1000V can withstand instantaneous high-voltage 6000V. Although SHS800 is lacking in function "isolation" of SHS1000, its high overvoltage level CATII 1000V also really makes an impression, the vertical sensitivity of the configuration reaches to 2mv/div~100v/div, what's more, this oscilloscope's high configurations with 1GSa / s real-time sampling rate and 2M memory depth, I believe it is also a very good choice.
About SIGLENT:
Siglent is a national high-tech company, concentrates on R&D, sales, production and services of measurement products. Siglent is the ISO9001:2008 International Quality Management System and ISO14001:2004 Environmental Management System Certified company. The products have already covered digital oscilloscope, Isolated Handheld Oscilloscope, Function/Arbitrary Waveform Generator, and Spectrum Analyzer and other general test instruments after years' development. Nowadays, Siglent becomes the biggest DSO manufacturer of shipment inChina. Website www.siglent.com
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