Is the MSO from Rigol and Siglent a timing analyzer or a state analyzer? - Page 1
Forum section: electronics / testgear

author: pascal_sweden
author_rank: Super Contributor
timestamp: August 28, 2016, 12:49:19 am
content: Is the MSO from Rigol and Siglent a timing analyzer or a state analyzer?Or is it both a timing analyzer and a state analyzer?https://youtu.be/fez6GqI6yxs?t=54Timing analyzer:Logic analyzer that relies on asynchronous sampling.State analyzer:Logic analyzer that uses the system clock of the Device Under Test for sampling.

author: tautech
author_rank: Super Contributor
timestamp: August 28, 2016, 12:55:57 am
content: Quote from: pascal_sweden on August 28, 2016, 12:49:19 amWhich MSO, there are 2 series.

author: pascal_sweden
author_rank: Super Contributor
timestamp: August 28, 2016, 01:32:30 am
content: I like to know this for the following series:Rigol:MSO1000Z series (or DS1000Z Plus series with LA option)MSO2000A seriesSiglent:SDS1000X series (LA option)SDS2000X series (LA option)

author: smarteebit
author_rank: Contributor
timestamp: August 30, 2016, 06:19:24 am
content: Quote from: pascal_sweden on August 28, 2016, 12:49:19 amAbsolutly timing analyzer. From the pin definition of their logic probe you can not find any clock. Not only Rigol and Siglent, but also Keysight and LeCroy do like this. I don't understand why they can not support an extra clock input.

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: August 30, 2016, 07:37:54 am
content: Quote from: smarteebit on August 30, 2016, 06:19:24 amBecause MSOs tend to use multi-bit ADCs running at a fixed sample rate to a common clock source to keep the overall design simple.Besides, many Keysight Infiniium scopes and all LeCroy WaveRunner/WavePro/WaveMaster scopes can recover the clock from the data pattern for a wide range of busses.

author: EEVblog
author_rank: Unknown
timestamp: August 30, 2016, 09:38:07 am
content: Quote from: smarteebit on August 30, 2016, 06:19:24 amBecause they are not designed to from a system point of view, it would complicate the whole sampling design. Synchronous sampling is not often required these days, and if you do then you are usually working on leading edge stuff that would require a proper logic analyser.

author: Orange
author_rank: Frequent Contributor
timestamp: August 30, 2016, 06:47:42 pm
content: Quote from: EEVblog on August 30, 2016, 09:38:07 amBack in the old days (80's) state analysers where also used as software debugger, eg the HP1630G was used for this. There were disassembles available for almost all major uPs like the 6800, 8085, 68000.... I worked with the 1630D, and was happy with the 1kByte ! memory. We could also do protocol decoding (RS232 and GPIB) by means of a separate bulky POD adapter, those where the days :-)So you don't hear me complaining about having to less memory on a MSO2072A scope......

author: Electro Fan
author_rank: Super Contributor
timestamp: August 30, 2016, 09:24:16 pm
content: A little bit off topic, but if someone would like a logic analyzer that supports state mode in addition to timing mode, here is one to consider:http://www.pctestinstruments.com/34 CHANNEL LA1034 LOGICPORT LOGIC ANALYZER500MHz Timing-Mode (Internal Clock)200MHz State-Mode (External Clock)Advanced Multi-Level TriggeringReal-Time Sample Compression+6V to -6V Adjustable Logic ThresholdCAN, I2C, SPI, RS232, 1-Wire and moreBuilt-in 300MHz Frequency CounterUSB 1.1 and 2.0 CompatibleSample buffer: 34 x 2048 samplesMaximum input: +/-40 volts DC, 15 volts peak-peak pulse amplitude

author: nctnico
author_rank: Super Contributor
timestamp: August 30, 2016, 09:34:40 pm
content: For the money of a Logic port you can also buy an older Tektronix or HP logic analyser which have much deeper memories. BTW I have come across some oscilloscopes which had an external clock function (IIRC Iwatsu and/or Yokogawa).

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: August 31, 2016, 05:11:47 am
content: Quote from: nctnico on August 30, 2016, 09:34:40 pmSome of the more expensive LeCroy scopes (i.e. WavePro and up) allow an external sampling clock but I don't think it suitable for asynchronous clocking for the MSO part.