A test handler is controlled by a tester to transport, select, focus and
test miniature digital camera modules. The modules are loaded onto a
transport tray and moved on a conveyer to a robot. The robot selects the
untested modules from the tray an alternately places the modules into two
test stations. A first test station focuses and tests a first module
while the second test station is loaded with a second module, thus
burying the handling time for the modules within the test time. The robot
returns tested modules to the transport tray, and when all modules on the
tray are tested, moves the tray out of the test handler. A second tray
with untested modules is positioned at the robot while the tested modules
of the first tray are being focus fixed and sorted into part number bins.
The overlap of operations buries handling time within the focus and test
time so that the limitation of total test time is depending on focus and
test operations.