I just came to post the same thing! [DllImport(_DRIVER_FILENAME, EntryPoint = "ps4000aSetBandwidthFilter")] public static extern UInt32 SetBandwidthFilter( short handle, Channel channel, BandwidthLimiter bandwidth ); Thanks for replying.

Thanks Martyn.
The API document I downloaded the website was R1 (not sure what link I followed to get an outdated manual), but the one in your link was R5 which had all the additional information for the 4444 series.
So, anyone reading this, check the revision of your API document!

The Picoscope 4444 spec says acquisition can be 12bit, 14bit, 16bit etc, but the APIs have no provision for setting bit depth. Questions. -What bit depth is being used when data is acquired by the API? -Can the bit depth be specified from the API? -Why even have 12 & 14bits as selectable, why not al...

Where can I find the PS File Format.

I'm capturing large data files and txt/csv is too slow (ie minutes to save).
Picoscope looks to be binary which is much faster to read and process.

What happens if calls aren't made fast enough to pull data from the streaming buffer?
Does the dll drop data or buffer it?
If it drops data, what is the mechanism for letting the application know.
If it buffers data, how much does it buffer?

Can I request that this function be added to the API.

Not being able to enable the hardware filters means we are now going to have to build external anti alias filters.

Within the PS6 app, you can enable a 1Mhz and 100kHz analog low pass filter.

Q1: What is the response of the filter
Q2: I can't find the API command to enable the analog filter.