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Hello, My application needs a synchronous sampling of logical inputs and analog inputs at the same time. I need to sample two differential analog inputs with 1 MS/s and 3 to 4 digital inputs with at least 8 MS/s (SPI at 3.5 to 4 MHz with MISO only). I need to sample at least 250 ms, up to 500 ms. It is possible to synchronize the digital inputs to the analog inputs ? I need to timestamp of the CS from the SPI synchronized to the analog input data. If I want to record data with the scope/logic, the sampling rate is limited to 1 MSPs on the Discovery 2 and up to 4 MSPs on the ADP3450 if I use WaveForms3. Is it possible to use the WaveForms API together with Python (or something else) to implement this synchronous readout, possibly with different sampling rates to save needed MPSs on either Discovery 2 or ADP3450?

Hello all, I need to use the AD2 / AD Pro for some analog/digital signal measurements. I have a few questions before I make the purchase. Can I acquire both the Analog as well as Digital input channels simultaneously with MATLAB? Can I change the Gain of an Analog Channel from MATLAB? If so, how? After changing the gain, does the resolution of 14bit apply to this amplified value? i.e. if with 1X gain the input range is +-25V, and the 14 bits are mapped to this voltage range, Does making the gain 10X, make the 14bits map to the new range? i.e. +-2.5V? Thus increasing the precision of the system to low voltages? In my test setup I need to probe (2 analog) signals which will vary in terms of mV (lets say 1-2mVs) and 2 Digital signals simultaneously. Will I be able to measure these small signals with AD2 or AD Pro, If so, which one will be better?

你好,我想买一个模拟Discovery Pro oszilloscopes (ADP3250/ADP3450). I want to make sure, that the device is suitable for my measurement application: I want to sample an analog signal with 5 MHz (1 Channel). 14 Bit resolution should be enough. I want to record the signal continiously. If this is not possible, then at least for 5 seconds. Unfortunately this is not possible with a standard oszilloscope. I want to transfer the data to my PC for further processing. According to the specs, both oszilloscopes can work in the so called "record mode" and provide an input buffer of up to 128 MSamples. This should be enough for me. However, it is mentioned, that the record mode is not available in linux mode at sample rates over 1 MS/s. For the normal operation mode there is no limit specified. Anyway, I can not believe, that it is possible to transfer the maximum data rate (100 MS/s / 125 MS/s) to the PC via ethernet. So the maximum possible sampling rate should depend on the ethernet connection between the PC and the device. If I use the WaveForms application in demo mode, I lost samples if the sample rate was higher than 2 MS/s. I dont know, wether this is representative. Does someone has experience what the maximum sample rate in normal record mode is? Is the device capable of measuring 25,000,000 sample points at a sample rate of 5 MHz, with an resolution of 14 Bit? Thank you for your help. Best regards, oeser

Hi, The 14-bit resolution analog channels are interesting. Do the ADP3450 combine that resolution with a PGA (programable gain amplifier)? For example, if I"m measuring a 1 mV pk-pk signal, will it be possible to utilize the entire 14-bit resolution on that signal? Thanks