User manual

12-12 Limit Testing 2400 Series SourceMeter
®
User’s Manual
when the lid of the handler is opened to eliminate a possible shock hazard. See
Section 13, “Digital I/O port” and “Output enable line,” for operation details on the
output enable line.
Handler types
The SourceMeter can be used with either of the two basic types of handlers.
When used with a Category Pulse Handler, the SourceMeter pulses one of the
four handler lines. The handler then places the DUT into the bin assigned to the
pulsed line.
When used with a Category Register Handler, the SourceMeter outputs a bit pat-
tern to three handler lines. After the SourceMeter sends the end-of-test (EOT)
strobe pulse to the fourth handler line, the handler places the DUT into the bin
assigned to that bit pattern.
Category pulse component handler
When using this type of handler, the SourceMeter pulses one of the four handler
lines when a pass or fail condition occurs. The handler then places the DUT in the
bin assigned to that pulsed line. When interfacing to this type of handler, a maxi-
mum of four component handler bins are supported.
If the handler requires low-going pulses, then the four digital output lines of the
Source-Meter must be initially set to high. This initial HI, HI, HI, HI clear pattern on
the output lines represents a no action condition for the handler since it is waiting
for one of the lines to go low. A line goes low when the defined fail or pass pattern
sets it low. For example, if you want a particular test failure to pulse line #4 of the
handler, the defined fail pattern has to be HI, HI, HI, LO. When the failure occurs,
line #4 will be pulled low, and the DUT will be placed in the bin assigned to that
pulsed line.
If the handler requires a high-going pulse, the four digital output lines of the
SourceMeter must initially be set low. The LO, LO, LO, LO clear pattern repre-
sents the no action condition for the handler. When one of those lines are pulled
high by a defined pass or fail bit pattern (i.e., LO, LO, LO, HI), the DUT will be
placed in the bit assigned to that pulsed line.
Category register component handler
When using this type of handler, the SourceMeter sends a bit pattern to three han-
dler lines when a pass or fail condition occurs. This bit pattern determines the bin
assignment for the DUT. With the pass/fail pattern on the output, line #4 is then
pulsed. This end-of-test (EOT) pulse latches the bit pattern into the register of the
handler, which places the DUT in the assigned bin. When interfacing to this type
of handler, a maximum of eight component handler bins are supported.