Hello all,
could you please explain what is the difference between the models in the subject? The website is not showing anything obvious on the topic, front panels looks similar, comparing specs is somewhat laborious and gives counterintuitive results. Please answer, if there is someone who has experience.
Thank you,
A.
could you please explain what is the difference between the models in the subject? The website is not showing anything obvious on the topic, front panels looks similar, comparing specs is somewhat laborious and gives counterintuitive results. Please answer, if there is someone who has experience.
Thank you,
A.
And if you need service from AP, which models will they still touch? It's confusing that some 27** models are in the column for 'Sys 2 Cascade Plus', not under 2700?
And 2700 models have lower THD+N than 2200,2300,2500 - correct?
The 96K 2722 measures identical THD+N specs to the 192K 2722 (-115dB @ 2V RMS @ 1KHz).
And 2700 models have lower THD+N than 2200,2300,2500 - correct?
The 96K 2722 measures identical THD+N specs to the 192K 2722 (-115dB @ 2V RMS @ 1KHz).
Unless you want to analyse the digital bit streams going into or out of DACs and ADCs, the lowest cost option is the analog version, not the dual domain version.
But you should get the DSP option to be able to do FFTs which needs the digital generator and DSP analyzer.
You often find them on eBay for instance, and are markedly less costly than a dual domain version.
People often do not understand that you don't need a dual domain version if you want analog + DSP.
But there's no service from AP on any of the S2 versions. While the schematics for the S1 units are freely available online, not so for the S2. But Duke (audio1man on diyaudio) can often help you, he's a retired AP engineer.
Jan
But you should get the DSP option to be able to do FFTs which needs the digital generator and DSP analyzer.
You often find them on eBay for instance, and are markedly less costly than a dual domain version.
People often do not understand that you don't need a dual domain version if you want analog + DSP.
But there's no service from AP on any of the S2 versions. While the schematics for the S1 units are freely available online, not so for the S2. But Duke (audio1man on diyaudio) can often help you, he's a retired AP engineer.
Jan
You mean pre-Cascade S2, and they still service S2 Cascade and 2722? Or not? You have a 2722. How do you plan to service it? Thanks!
I had about 3-4pcs 27** and 2pcs 23** on my day job, all 27** had loopback 1k@2V THD+N 1.5PPM, 23** 2-1.9PPM. I have in my home today 2522 with 1.6PPM. At the same time, I tested 2522 analyzer with a nearly ideal sine wave(THD+N residual -132-134db) so I may see the residual THD+N of the 2522 analyzer, and it is 1.0PPM.
To get the latest situation, which is updated every year, check their website.
Regarding my own unit, I plan on not breaking it ;-)
Jan
I have a 2722 96K Cascade system. My attitude is very much the same, i.e. don't break it. In truth, it gets far less use than the UPVs, which are the daily workhorses. I wonder if I should bite the bullet and sell the 2722...
To get THD+N less than AP's specs, need to use forced AP's attenuator as low as possible. Fixed at 2.5V range, can show you 1.2PPM at 3V.
By far, what happened to a broken AP is that someone decided that the output could be used as an input and dumps a lot of voltage into the output.
Maybe the fact that the outputs have both XLR as well as banana jacks is to blame for it.
Jan
Maybe the fact that the outputs have both XLR as well as banana jacks is to blame for it.
Jan
I've talked to AP on this topic, and they said that these models are on "conditional support", meaning that some parts may not be available. but still the units are accepted for service. AP has a service partner in Europe too.
Thank you everyone for your answers!
To me the price difference makes little sense, if the only difference is in maximum frequency supported by digital I/O part, then why the difference in cost is ~1.6x between the 2722/2522 and 2322 ? Is it dictated by the value for users or internal complexity?
To me the price difference makes little sense, if the only difference is in maximum frequency supported by digital I/O part, then why the difference in cost is ~1.6x between the 2722/2522 and 2322 ? Is it dictated by the value for users or internal complexity?
Regardless of how they get it (whether it costs them more or not - I suspect it does cost them more), the 2722 models have lower THD+N and are still supported (albeit conditionally, in the case of the 96KHz models). That makes 2 reasons for why the 2722 is more expensive.
Not sure what you mean by supported, but all these devices are discontinued https://www.ap.com/analyzers-accessories/discontinued/
Also, this page suggests that AP had two different devices with the same marking:
2722A - Cascade Plus and 2700 series, and they were discontinued at different times.
Does anyone knows how to distinguish one from the other?
If it's a 192K model, it'll typically have '192K' printed on the middle front vent. The 96K Cascade+ model simply has that - with no indication of sample rate. I'm sitting here with a 96K model
I've also seen UPV's on ebay, but haven't studied them in detail. I wonder what is the situation with UPV support and what are their capabilities for multitone settings? How good are they if there is a need for non-standard test?
UPV vs 2722 is a separate discussion. UPV has 2dB more THD+N, but it is more useful in many ways (live FFT). Software isn't easy to learn. It is still supported by R+S (as of a couple of weeks ago when I asked). The ADC is no longer available, which possibly explains why they discontinued it. I doubt the AA market is profitable for R+S to release a new AA in the near future.
NB - if I run the oscillator from 2722 into UPV, I get same THD+N as 2722. This makes it a bargain with a Viktor oscillator (might even go lower than -115dB). Multi-tone tests require the B3 option (a total must - it kicks the AP's butt in this regard).
NB - if I run the oscillator from 2722 into UPV, I get same THD+N as 2722. This makes it a bargain with a Viktor oscillator (might even go lower than -115dB). Multi-tone tests require the B3 option (a total must - it kicks the AP's butt in this regard).