Altium Designer Documentation


Created: September 20, 2015 | Updated: August 20, 2021

Parent page: PCB Query Functions - Membership Checks


Returns the xSignal object with the specified name.


IsxSignal(Name : String) : Boolean/Boolean_String

As you define the Query expression, a pop-up list of all existing xSignals, by name, is presented.

Example Usage

IsxSignal('DRAM_A0_PP1') = True
IsxSignal('DRAM_A0_PP1') = 'True'

Returns the xSignal DRAM_A0_PP1.

Not IsxSignal('DRAM_A0_PP1')
IsxSignal('DRAM_A0_PP1') = False
IsxSignal('DRAM_A0_PP1') = 'False'

Returns all objects except the xSignal DRAM_A0_PP1.


  1. The single quote characters (') at the start and end of the Name string are mandatory.
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