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SIGLENT SDS1072CML (v5.01.02.22) next firmware feature requests
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tv84:

--- Quote from: tautech on April 17, 2020, 07:57:52 pm ---
--- Quote from: tv84 on April 17, 2020, 01:45:22 pm ---As suspected. I think we would be able to upgrade to 150Mhz but we would have to patch the FW in order to bypass a disabling flag. Maybe one day...

--- End quote ---
I well remember one day installing the latest FW into a 100 MHz CML+, as I do with all DSO's we despatch, and it got dumped to a 150 MHz model !  :o Dunno why but the customer was well pleased.  :-DD

--- End quote ---

CML+ are easy. CML are harder...   ;)
sameerdhiman:
Can you do me one favor if possible.

I need SDS1072CML's frequency response up to 200 MHz. I do not have any frequency generator.

Actually, amid lock down I got time to build a Variable frequency RF generator (Analog). It just touched 180 MHz with 20mV pk-pk as measured with above DSO. To know what is the actual amplitude is there I need oscilloscopes frequency response curve or data series in excel format. Can you please provide me that.

Regards,
Sameer Dhiman
tautech:

--- Quote from: sameerdhiman on April 18, 2020, 08:50:54 pm ---Can you do me one favor if possible.

I need SDS1072CML's frequency response up to 200 MHz. I do not have any frequency generator.

Actually, amid lock down I got time to build a Variable frequency RF generator (Analog). It just touched 180 MHz with 20mV pk-pk as measured with above DSO. To know what is the actual amplitude is there I need oscilloscopes frequency response curve or data series in excel format. Can you please provide me that.

Regards,
Sameer Dhiman

--- End quote ---
Typically the -3dB point for most DSO's is 10-20% beyond rated BW. At 200 MHz my guess would be 50+% down.
But of course if the probe is in circuit it could be more if they are only 70 MHz rated probes.
Standard, it should give good indicative results to approaching 100 MHz.

You need make these kind of measurements with care as even the signal source amplitude accuracy impacts on results.
sameerdhiman:
Tautek, you are Siglent's distributor and have access to their products. If you have time can you please make measurements using 70 MHz CML+ (I think CML model would not be available) with factory shipped 70 MHz probe in 1x and 10x modes not very precise data is required, only generator's reference amplitude (in pk or pk-pk assuming generator output is rock solid) and measured figures are required at 30, 40, 50 .... 200 MHz in 10MHz increments. As you know DSOs are based on Gaussian response it is cumbersome to make guess whether beyond -3dB point signal is hitting brickwall filter or are they rolling of at 6dB/octave or 12 or 18.

It would be great help from your side.

Regards,
Sameer Dhiman
tautech:

--- Quote from: sameerdhiman on April 19, 2020, 06:02:53 am ---Tautek, you are Siglent's distributor and have access to their products.

--- End quote ---
Correct.....but only their products I care or chose to stock.

I only have SDS1102CML+ here and when sold will not get any more as their technology is outdated for today's use and SDS1202X-E is far better value for the $.
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