I'm looking forward to Mike's next reviews. Hopefully that test of a 20Hz 400uV sine on high res mode to see if it can do what the HMO1212 did.
I'm looking forward to Mike's next reviews. Hopefully that test of a 20Hz 400uV sine on high res mode to see if it can do what the HMO1212 did.I don't have an easy way to generate a known-clean signal that low - Rigol DG4062 will do 1mv RMS but no idea how much noise may already be on it.
I'm looking forward to Mike's next reviews. Hopefully that test of a 20Hz 400uV sine on high res mode to see if it can do what the HMO1212 did.I don't have an easy way to generate a known-clean signal that low - Rigol DG4062 will do 1mv RMS but no idea how much noise may already be on it.No attenuator at hand? I create low level signals using an attenuator. The noise gets attenuated as well.
I don't have an easy way to generate a known-clean signal that low - Rigol DG4062 will do 1mv RMS but no idea how much noise may already be on it.
Still what is special about displaying a 400uV (RMS I assume?) 20Hz signal? I don't think there are DSOs out there which can't do that. I just tried my daily driver and it will trigger at even lower signal levels.
Still what is special about displaying a 400uV (RMS I assume?) 20Hz signal? I don't think there are DSOs out there which can't do that. I just tried my daily driver and it will trigger at even lower signal levels.According to the screenshot in post 450, where ci11 put out the challenge originally, it should be 400uV p-p. It seems that limiting the bandwidth (to 20 MHz, I assume) is allowed.
I forget -- which scope do you use as your "daily driver"?
Dave still hasn't reviewed scopes he does have
Still what is special about displaying a 400uV (RMS I assume?) 20Hz signal? I don't think there are DSOs out there which can't do that. I just tried my daily driver and it will trigger at even lower signal levels.According to the screenshot in post 450, where ci11 put out the challenge originally, it should be 400uV p-p. It seems that limiting the bandwidth (to 20 MHz, I assume) is allowed.
I have two units, one to giveaway!
BTW, I'm told that the launch deal on this scope is limited to 300 scopes in each market segment (US, Asia, Europe), so you'd better get in quick before the universities scoop them up.
I don't have an easy way to generate a known-clean signal that low - Rigol DG4062 will do 1mv RMS but no idea how much noise may already be on it.
If you have a 24 bit sound card in a PC the (free) ARTA audio testing software will do the job:
http://www.artalabs.hr/
You will loose bits as the PC volume slider is decreased, but still will probably be above the 16 bits of the high-res scope mode. If it won't go that low before cutoff with the PC slider a resistive divider would be OK, just stay above 5K or so total to keep from loading whatever the sound card is using for an output chip. I know that is a lot of set-up stuff though and probably not on the schedule any time soon. I'll do the test when I eventually get my RTB2004's, in May now they say. I have a ultra-low THD 1KHz audio oscillator, the oscillator in a Keithley 2015, and the oscillator in a QuantAsylum QA401 audio analyzer (which is essentially a 24 bit sound card in a box).
BTW, in case folks don't remember from previous posts, this is ci11's request from back in post 450. He and I are audio guys, so the ability of that HMO1212 in high res mode to trigger and display the 20Hz 400uV waveform is pretty good stuff. The theory here is that the RTB 2004 should be able to do at least as well, probably better, since it seems to have HAMEG DNA, lol.
Rich could easily do the test too, if he should happen to have access to a R&S UPV. It can generate 20Hz at -100dB THD+N.
Do they have the special deal going on in Australia ?
Dave,
Are you saying that the Australian price price for the RTB2004 COM4 is US$2080 = AUS$2727.71 (at exchange rate US0.7624 = AUS$1), when you talk to them ?.
Dave,
Are you saying that the Australian price price for the RTB2004 COM4 is US$2080 = AUS$2727.71 *1.1 = $3000.48 GST inclusive (at exchange rate US0.7624 = AUS$1), when you talk to them ?.
Just to spell it out again to buy the scope here it will cost you "AUS $3000.48 + delivery charges"
Dave,
Are you saying that the Australian price price for the RTB2004 COM4 is US$2080 = AUS$2727.71 *1.1 = $3000.48 GST inclusive (at exchange rate US0.7624 = AUS$1), when you talk to them ?.
Just to spell it out again to buy the scope here it will cost you "AUS $3000.48 + delivery charges"
Dave,
Are you saying that the Australian price price for the RTB2004 COM4 is US$2080 = AUS$2727.71 *1.1 = $3000.48 GST inclusive (at exchange rate US0.7624 = AUS$1), when you talk to them ?.
Just to spell it out again to buy the scope here it will cost you "AUS $3000.48 + delivery charges"