Net length is wrong (vias isn't taken into account)

To match a diff pair you should be using the same number of vias in _P and _N and thus via length is of no consequence.

Thanks for the reply.

Sure! This is just an example.

Real problem is observed when I need to match differential pair length to data bus as well as route all signals inside data bus.

In that case, you will need to manually add up via lengths which is non-trivial for more complex stack-ups. Or pony up several thousand dollars and upgrade to Designer.

Altium decided to leave the via length feature out of CS, which seems fair enough to me for its target market and cost.

Are you seriously ?

If so, I'm can't agree with you.

When we are talking about trace matching tool, yes, this is a "feature" available in more expensive package.

But when net length is showed without simple distance between layers this is just a "bug".

Yes, absolutely serious.

The target market for CS is where via length is unimportant or is at least trivial to manually calculate.

How many hundred MHz is your design operating at and who are you using to manufacture your controlled impedance boards? Doesn't sound like entry level PCB design to me.

Good product should have balance of available features.

CS has net classes, diff pair routing, multilayer stack-up, but on other hand simple via length does not automatically calculated.

More expensive products like Altium have much more other usefull features.

Via length is not feature nowadays. It is one of  "must have" options today.

Hi,

a.stepanov has a good point.

CircuitStudio was marketed as a tool for professionals, isn't it? What's the point in buying a software tool if what you are saying is that the resulted PCB should be on the level with those drawn by hand on, let's say Inkscape?

Showing incomplete data seems a bug for me, too, regardless of the complexity of the design. Either you show it correctly or don't do it at all, otherwise it's misleading.

A "must have" for high frequency controlled impedance designs, yes.

But you're not actually using controlled impedance boards, are you? In which case your via lengths don't mean diddly-squat.

For a tool to be "professional" does not mean that it has to have every possible feature, both CircuitStudio and Altium Designer are professional tools but aimed at different markets and types of design. I think Keven in correct in that for serious high speed design work you would want to trade up to Altium Designer which has far more tools available to address the sort of design issues that will be encountered. Don't forget that Altium have a special offer for CS users whereby they can get a discount on AD equal to what they paid for CS and you get to keep your CS license. If you are adding vias to critical high speed nets then you would most likely want to add the same number of vias to each net otherwise impedance and propagation delays won't necessarily match regardless of net lengths.

Point taken but, as an engineer, you know that there is a difference between "equal" and "approximate"...

My previous answer was also in regards of the affirmation "entry level PCB design". In my opinion one such package is the like of Fritzing or Express PCB and others on that level.

For sure CircuitStudio is not such a tool and it may also not be high-end but there are some expectations (within certain limits as you pointed out). One of them is accuracy of the provided data.