Specifications

in voltage levels defines the color. By testing these
voltage signals with PCI-1711L, correct color
display can also be tested.
After verifying the various functions of the first key,
a signal goes to PCI-1758UDIO to inform that it can
proceed to the next key. The process continues to
check each key on the keypad. When complete, a
digital output channel is used to alert the operator
so that the tested phone can be exchanged with a
new one.
If a key press results in an error, it can halt the
output of signals for the silicon fingers, and wait
for operator action. The system can also record the
error into the database together with information
on where in the test procedure the error occurred
and the serial number of the product. This makes it
easier for production engineers to troubleshoot the
production line and do quicker repairs.
The system diagram shows a well balanced system
to test four phones simultaneously, but can easily be
scaled by adding more cards. PCI-1758UDIO can
activate the 16 numeric keys on four phones with its
64 output channels.
The 16 digital inputs of PCI-1711L are used to
capture the digital Touchtone codes (four channels
per phone), while the 16 analog inputs are used for
testing the LCD, LEDs and speaker. The 16 digital
outputs can be used to activate more silicon fingers
for extra function keys, bringing the maximum
number of keys on a phone up to 20.
Conclusion
•
The new system has led to clear productivity and quality improvements. The keypad functionality
test has reduced testing processes from a minute to 5 seconds, and test accuracy has increased
from 95.7% to 100%
•
The system is adaptable as minor modifications can make the system capable of running many
similar tests, and adding identical cards can increase capacity
•
With open standard components, there is a choice of suppliers for the application
PCI-1711L
100 kS/s, 12-bit , 16-ch S.E.
Input Low-cost Multifuction
Card w/o AO Function
PCI-1758UDIO
128-ch Isolated Digital I/O
Card
Speaker/
Color LCD Display
Active Silicon
Fingers
32