Contents
What is DB in PCB?
The database PCB statement defines the DBD of the database that the application program will access. Database PCB statements also define types of operations (such as get, insert, and replace) that the application program can perform on segments in the database. The database can be either physical or logical.
What does DB means in electrical?
A distribution board is the main electrical supply system for any commercial or residential entity. The main cable comes into the distribution board and then via breakers get distributed in the secondary circuits such as lights and plugs.
Will IO PCB mask mentioned in PSB?
Note! PCBs are passed by IMS to program in the same order they are listed in the PSB. The IO-PCB must be listed first.
What is PCB mask?
Soldermask is a protective layer of liquid photo image able lacquer applied on the top and bottom side of a Printed Circuit Board. The function of the Soldermask is to protect the copper, apart from the solder pads, from: Oxidation. Creating shorts during. Soldering (bridges)
What do the letters on a PCB mean?
On a printed circuit board, I see lots of tiny letters and numbers. Is there some kind of standard that dictates what letter indicates what type of component? The technical term for the markings is “reference designators” (aka “refdes”) and there are a few standards can define them.
What do the letters in a reference designator mean?
Standard Reference Designators A reference designator unambiguously identifies a component in an electrical schematic or on a printed circuit board. The reference designator usually consists of one or two letters followed by a number, e.g. R13, C1002.
What is the definition of a designator component?
Designators Designator Component type A Separable assembly or sub-assembly (e.g. AT Attenuator or isolator BR Bridge rectifier BT Battery
Where can I find the CERT number on a PCB?
These can be done in silkscreening process, or anti-soldermask processes. You can look up UL cert numbers here: http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm Fill in the UL file number with the ~7 digit number on the PCB to find who actually fabricated it.