Hi All,
I am looking for an oscilloscope - I am mostly interested in homebrew, ham and such.
I have an offer of a Agilent 54616B 500MHZ 2GSa/s (OLD) and Siglent 1202X-E (NEW) for about the same price. Once is a digitizing scope another a digital scope.
Not really. Both are digitizing digital scopes, and because there are no non-digitizing digital scopes these scopes are just called 'digital scopes' or 'DSOs'.
I also understand that Agilent doesn't have the fancy FFT transforms and advanced math functions of the Siglent. But then higher sampling, single-shot bandwidth etc makes it very attractive. But the Agilent is old, discontinued and probably if it goes bust on me, I wouldn't be able to repair it or get it repaired.
Considering that this is going to be my only scope for the next 5 years, is the (OLD) Agilent a better choice over the (NEW) Siglent?
The old Agilent 54600 Series were great general purpose scopes back then, and they are generally very robust and reliable. The real problem with the 54616B is that this is not one of the fast MegaZoom equipped 54600 scopes which come with large memory, it's a conventional model which while offering 2GSa/s sample rate only has a measly sample memory of 5,000 points (i.e. 5kpts). Which means that the sample rate (and thereby the useable analog BW!) will quickly drop like a rock on anything except the shortest time base, and it means the scope will only be able to capture extremely short sequences at adequate sample rates.
It also lacks most of the features you will find in any bottom-of-the-barrel scope today, like color display, usable FFT (the 54616B can do FFT but only with 1kpt), serial decode and so on.
So no, I would not invest any money into a 54616B, even if you need the BW. Which doesn't look like you do, anyways. Besides that, a 54616B isn't really worth more than $200-$250.
So yes, get the Siglent, and if you can stretch the budget a bit more then consider getting a 4ch scope like the Rigol DS1054z or the Siglent SDS1104X-E because there are many situations where having more than just two channels is really helpful.