Fan noise measurement. That'll be real challenge
Piss easy with a phone app like this:
USB keyboard and mouse performance in the UI compared to 2kX HD.
Piss easy with a phone app like this:
An app won't tell you how whiny or annoying a sound is, only how loud it is.
Piss easy with a phone app like this:
An app won't tell you how whiny or annoying a sound is, only how loud it is.
Really
About time you did some research instead of spouting about shit you have no experience with.
Audio spectrum analyzers give frequency and level measurements just in case you didn't know.
Their measurement only need be qualified by the distance to microphone measurement and I'm very sure Martin already knows how these things work.
Piss easy with a phone app like this:
An app won't tell you how whiny or annoying a sound is, only how loud it is.
Really
About time you did some research instead of spouting about shit you have no experience with.
Audio spectrum analyzers give frequency and level measurements just in case you didn't know.
Their measurement only need be qualified by the distance to microphone measurement and I'm very sure Martin already knows how these things work.
I guess the real problem is can you trust those result?
I bet that no one is calibrated.
About time you did some research instead of spouting about shit you have no experience with.
Audio spectrum analyzers give frequency and level measurements just in case you didn't know.
About time you did some research instead of spouting about shit you have no experience with.
Audio spectrum analyzers give frequency and level measurements just in case you didn't know.
Please tell us what a whiny/annoying spectrum looks like compared to a nice relaxing one.
This needs to be precisely defined if the results are to be valid.
Please tell us what a whiny/annoying spectrum looks like compared to a nice relaxing one.
This needs to be precisely defined if the results are to be valid.Oh FFS Fungus, must you be spoon fed ?
Did you not follow this link posted above:
https://apps.apple.com/nz/app/id1281873790
Their measurement only need be qualified by the distance to microphone measurement and I'm very sure Martin already knows how these things work.
It's a spectrum analyzer (for a device not everybody has).
Their measurement only need be qualified by the distance to microphone measurement and I'm very sure Martin already knows how these things work.
Maybe it's no surprise but I have a calibrated microphone at home.
And access to a ISO calibrated Class 1 SPL meter..
Piss easy with a phone app like this:
Audio Spectrum Analyzer dB RTA
Hi folks,
No no, I don't have the scope yet, I also have to wait about 2 weeks for it....
This is already a placeholder or should give the possibility to consider it in advance, what I should test everything.
And compare, because I still have other scopes here....
First my own, quasi as a reference, the SDS2504X HD.
Then from work the Rigol DS1054Z and the Siglent SDS1104X-E.
The predecessor and the current competitor, so to speak.
Other existing measuring equipment:
- SDG2122X 120Mhz function generator.
-R&S SML01 1.1Ghz signal generator
-Tektronix A6302/AM502 current clamp combination
- Demoboards with several signals (and decoder functions) from Batronix and Siglent
- Deskew fixture from Siglent
- Analog 10Mhz test oscillator for ENOB determination
- Ultra low distortion 1khz sine generator (still to be tested)
- Leo Bodnar pulser 40ps risetime
So think about something, I'll get back to you here when the Rigol has arrived.
What is not clear is:
- overload recovery.
- distortion (two tone test)
People are often tempted to use the "Wave Combine" function of the SDG for this. Unfortuanetely, this generates some 3rd oder intermodulation products itself - at least at higher frequencies. So for this test, we need to use the two outputs of the SDG individually and have a resistive wideband power-combiner to create the test signal. This gives only 6 dB isolation between channels, but in my experience this is sufficient and no additional attenuators for the individual channels are required.
Not that its needed for a comparative test.
And a measuring tape I hope.
Anyways, sure lots better than Dave's ear.
Recall the Wave Combine on the SDG2XXX is pretty good, vaguely remember we measured such on the SSA3021X+, but may not be good enough for a 12 bit DSO. WRT to using separate AWG outputs, adding a 6~10dB pad in each AWG output before the resistive combiner should eliminate any potential IMD between the AWG channels, and still have enough signal level at the test DSO input.
Boot time: 1min20sec.
The display itself is very reflective and not super bright, rather somewhat "dimmed".
-Bodnar, the second:
Memory on automode, when the sample rate drops, the signal is already visibly changed.