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Siglent SDS2000X HD, missing Features and Bugs

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KungFuJosh:
Can somebody please put in a feature request to make it possible to change Trigger Coupling frequency values (preferably arbitrarily)? Or is that not possible?

Thanks,
Josh

2N3055:

--- Quote from: KungFuJosh on October 02, 2024, 03:01:10 pm ---Can somebody please put in a feature request to make it possible to change Trigger Coupling frequency values (preferably arbitrarily)? Or is that not possible?

Thanks,
Josh

--- End quote ---

Can you explain, please, what do you mean by this?

KungFuJosh:

--- Quote from: 2N3055 on October 02, 2024, 03:20:30 pm ---
--- Quote from: KungFuJosh on October 02, 2024, 03:01:10 pm ---Can somebody please put in a feature request to make it possible to change Trigger Coupling frequency values (preferably arbitrarily)? Or is that not possible?

--- End quote ---

Can you explain, please, what do you mean by this?

--- End quote ---

Sure! The SDS2000X HD datasheet says:


--- Quote ---Trigger Coupling:

C1-C4:
LFRJ: Attenuates the frequency components below 1.17 MHz
HFRJ: Attenuates the frequency components above 660 kHz

EXT:
LFRJ: Attenuates the frequency components below 7.5 kHz
HFRJ: Attenuates the frequency components above 250 kHz
--- End quote ---

I want the ability to arbitrarily set those frequencies to anything I want. For example, Low Frequency Reject (HP Filter) frequencies below 5kHz, or 20kHz, or 800Hz, or whatever the cutoff might need to be to eliminate a specific waveform I don't want interfering with triggering.

In the attached example, Math filter is used to isolate two waveforms on CH1.

I want the trigger to be able to ignore either one of those waveforms depending on what settings I choose. Having the frequency not hardcoded, as it currently is, would make this trigger type significantly more useful / powerful.

Thanks,
Josh

2N3055:

--- Quote from: KungFuJosh on October 02, 2024, 04:09:57 pm ---
--- Quote from: 2N3055 on October 02, 2024, 03:20:30 pm ---
--- Quote from: KungFuJosh on October 02, 2024, 03:01:10 pm ---Can somebody please put in a feature request to make it possible to change Trigger Coupling frequency values (preferably arbitrarily)? Or is that not possible?

--- End quote ---

Can you explain, please, what do you mean by this?

--- End quote ---

Sure! The SDS2000X HD datasheet says:


--- Quote ---Trigger Coupling:

C1-C4:
LFRJ: Attenuates the frequency components below 1.17 MHz
HFRJ: Attenuates the frequency components above 660 kHz

EXT:
LFRJ: Attenuates the frequency components below 7.5 kHz
HFRJ: Attenuates the frequency components above 250 kHz
--- End quote ---

I want the ability to arbitrarily set those frequencies to anything I want. For example, Low Frequency Reject (HP Filter) frequencies below 5kHz, or 20kHz, or 800Hz, or whatever the cutoff might need to be to eliminate a specific waveform I don't want interfering with triggering.

In the attached example, Math filter is used to isolate two waveforms on CH1.

I want the trigger to be able to ignore either one of those waveforms depending on what settings I choose. Having the frequency not hardcoded, as it currently is, would make this trigger type significantly more useful / powerful.

Thanks,
Josh

--- End quote ---
Josh,
thanks for explaining.

I'm not sure that is even possible....
It is hardcoded now so it can be simple and optimized. Triggering is realtime operation running of full speed datastream.

KungFuJosh:

--- Quote from: 2N3055 on October 02, 2024, 04:21:17 pm ---I'm not sure that is even possible....
It is hardcoded now so it can be simple and optimized. Triggering is realtime operation running of full speed datastream.

--- End quote ---

I think it may be possible to be added as a feature because the hardcoded frequencies 1. don't match (internal vs. external), and 2. aren't standard filter numbers like for the channel filters. It seems they were chosen at least somewhat arbitrarily and should be able to be replaced with a variable input. Or, a new trigger coupling filter with a variable input added, but that would seem redundant.

Thanks,
Josh

ETA: Check out nctnico's post with channel filtering: https://www.eevblog.com/forum/testgear/new-keysight-infiniivision-hd3-oscilloscope/msg5663417/#msg5663417

That would be nice too. 😉

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