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I require an attenuator that is capable of attenuating a signal from 0 to 250 MHz. The signal could be a dc voltage or some waveform. I have seen some digital attenuators that are used for RF and was wondering if these would work. Otherwise I would need to design my own so any thoughts on a...
I have created a polygon pour in AD and connected it to my GND net. When I pour it it connects all of the power nets to the pour. It also doesnt seem to be using the correct clearance around the signal nets. I'm sure I have some setting wrong but dont know which one.
Thanks
Jon
I have a design with 4 DDR3 memories. The address and control signals are identical for all 4 so I would like to save some time and just route 1 set and then duplicate the tracks for the other 3. Can I do this?
Thanks
Jon
anti pad pcb altium
What I would like to do is create an odd shaped pullback from the edge so I guess I need to add some solid regions around the board edge. Also I want to have the layer numbers. So I need to create a solid region with the number in negative?
Thanks
Jon
plane designer
I have created some internal planes with split planes in them. When I create the gerbers and view them in a gerber viewer program the plane is not filled in. I just get the outlines that I set.
Thanks
Jon
Altium net name
Hi
I have some net names that I would like to rename.
IOP1
IOP2
etc
I want to rename them to
IO1_P
IO2_P
Is there a quick way to do this?
Cheers
Jon
Thanks for the info. I had a play around with AD found something called From-To which you can set for a net. Then if you have a split net as in my case it will give you the lengths of the two paths which makes it easier to match the two path lengths.
I have two memory components that I am routing using a balanced T for the addr and control signals. Is there an easy way in AD to match the lengths. The problem I have is when the signal splits to each memory component I have no way of knowing the length.
Cheers
Jon
Hi
I would like to mirror the bottom layer so that I can place the silkscreen more easily. can someone tell me how to do this as I cant seem to find it.
Thanks
Added after 12 minutes:
Its ok I found it. View->Flip Board.
Hi
I have some differential pairs in Altium Designer that I would like to modify. Is there an easy way to change the track size and spacing once they have been routed?
Thanks
altium solder mask
Hi
I have a bga device and need to know what the solmask expansion should be set for the fanout vias. I have heard that the vias should be capped with solder mask to prevent solder flowing into them. So should the expansion be set to 0?
Cheers
You can select multiple objects using the find similar objects command. Just right click in the pcb and select it from the top of the menu (or shift+f). Then just click the object you want as a selection. A menu will come up were you can define how the objects should match. Once done press ok...
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