Qualectron - QT150, Testing RF Tuners

To demonstrate the capabilities of QT150 and the QSM technique, tailored for production board recovery and quality assurance tests, here is a demostration:

Test Setup

Ch 0 to Ch 7 of QT150 card 0 is connected from the tuner, to the 8 test points. In order to accomplish this, we can't with just one mux card ( i.e. with only 64 channels). More advanced method of interfacing can be accomodated with the Bed of Nails and the solenoids to actuate the UUT (Unit Under Test) test fixture

Learning

The test software provides features to learn all the 8 test points with different voltage and different frequency settings with the QSM through the fixture setup

Report

The user can choose to print out the results at the end of the test. This feature enable even the lowest-level operator to use the QT150

A typical error log looks like this:

Tested Board ID : B0 Master Board : THOMAS Test began at 13:30:13 - 10/01/96 and ends at 13:31:59 - 10/01/96

Board B0 Fails

Device TEST1 Fails ADDITIONAL LINKS FOUND :- Pin 1 shorted to : 7, 8 Pin 7 shorted to : 8 Pin 8 shorted to : 9 ----------------------------------------- Pin No Failure % Failure % HiZ Pins Missing Links Additional Links Occurance Deviation with Pins with Pins ----------------------------------------- 7 87.5% 96% - (8) ---- ---- Yes 1 25.0% 94% - (7) ---- ---- Yes 4 25.0% 48% - (7) 2 25.0% 35% - (7) 3 25.0% 39% - (7) 6 25.0% 26% - (7) 9 25.0% 94% - (7) ----------------------------------------- LIST OF DEVIATIONS THAT OCCURED >= 0.0%

TEST1-1 - TEST1-7 short fails! 94 % TEST1-1 - TEST1-8 short fails! 61 % TEST1-2 - TEST1-7 Trace fails! 35 % TEST1-2 - TEST1-8 Trace fails! 27 % TEST1-3 - TEST1-7 Trace fails! 39 % TEST1-3 - TEST1-8 Trace fails! 31 % TEST1-4 - TEST1-7 Trace fails! 48 % TEST1-4 - TEST1-8 Trace fails! 33 % TEST1-6 - TEST1-7 Trace fails! 26 % TEST1-6 - TEST1-8 Trace fails! 13 % TEST1-7 - TEST1-8 short fails! 96 % TEST1-7 - TEST1-9 Trace fails! 94 % TEST1-8 - TEST1-9 short fails! 61 %

-------- End Of Board Result --------

Error Log/Report Contents

Open and short circuits are given higher priority
Occurance failures are the number of failures to the total number of traces for the particular pin
Deviation failures are the failures beyond the deviation set forth by the user for every pin - and this is not in sorted order

Error Log/Report Interpretation

A higher percentage of failure in the occurance failure for only a specific pin, indicates that it is the failure inside the IC
A higher percentage of failure for a specific combination of pins in the occurance, shows the input to the IC is bad

QT150,Testing RF Tuners