Signal testing apparatus

A signal testing apparatus for testing signals output from a plurality of pins of a host computer interface (HCI), comprising:

• a plurality of first switches, each of the plurality of first switches comprising:
• a static contact capable of correspondingly connecting to one of the plurality of pins of the HCI;
• a first dynamic contact correspondingly connected to one of a plurality of pins of a peripheral equipment interface (PEI) adapted to the HCI;
• and a second dynamic contact;
• a second switch comprising:
• a static contact;
• and a plurality of dynamic contacts correspondingly connected to the second dynamic contacts of the plurality of first switches;
• and a testing terminal comprising:
• a first testing point connected to the static contact of the second switch;
• and a grounded second testing point;
• wherein the plurality of pins of the HCI are correspondingly connected to the plurality of pins of the PEI in response to the static contact and the first dynamic contact of each of the plurality of first switches being connected to each other;
• and wherein the pins of the HCI are correspondingly connected to the plurality of dynamic contacts of the second switch in response to the static contact and the second dynamic contact of each of the plurality of first switches being connected to each other;
• thereby the static contact of the second switch is capable of being selectively connected to one of the plurality of dynamic contacts of the second switch to test the signal output from the corresponding one of the plurality of pins of the HCI.