Q
qamobile
Hello! I have been lurking around these forums for the past few days and I have to say, wow, lots of great info!
If this thread is in the wrong location, I apologize.
Ok, so here is my question:
My company uses R/F boxes and shields to verify a cell phones R/F capabilities. However, I am skeptical of the R/F boxes capabilities. The reason why is two fold:
1. The technicians due various things (or tricks) to get the testing boxes to pass a phone during the R/F testing phases. They start the R/F testing and wait until a certain phase of testing and then put the phone in the box and close it. Others put the phone in the box, wait with the box open until a certain phase and then then close it. Yet others have their own "special" tricks to get it to pass. (I know, I know. Please spare me the inconsistancies in this little gem I walked into.)
2. A phone can fail the R/F testing in one box, be repeatable in failing at that testing box and then the phone can be taken to another box and pass with flying colors and vice versa.
Ok, please disregard all the problems we already see with the above statements. Focus mostly on number two.
So, what I would like to start with is testing the R/F boxes capabilities first. I already know that the technicians are having an issue. I get that, I see it, I understand, I know etc. My problem, however, sits at the moment that even when following the R/F box manufacturers testing process, the same phone can vary so much between different R/F boxes of the same model that it can yield a pass/fail between the two. I am wondering if this is why the technicians started finding "other methods" to get these phones to pass the R/F testing phases.
So, my first steps, I think, is to test one phone, with the same jig, battery, R/F sim, etc. n number of times and get the results of the R/F testing output. However, is this correct?
Will this give me a Cpk (Cmk) of the R/F testing machine?
How many times should I test a phone on the machine to get a good look at the variance? (I am thinking 10?)
Afterwards I should do a GR&R between the technicians? On each R/F box?
How would you approach this situation?
Thanks for any replies!
If this thread is in the wrong location, I apologize.
Ok, so here is my question:
My company uses R/F boxes and shields to verify a cell phones R/F capabilities. However, I am skeptical of the R/F boxes capabilities. The reason why is two fold:
1. The technicians due various things (or tricks) to get the testing boxes to pass a phone during the R/F testing phases. They start the R/F testing and wait until a certain phase of testing and then put the phone in the box and close it. Others put the phone in the box, wait with the box open until a certain phase and then then close it. Yet others have their own "special" tricks to get it to pass. (I know, I know. Please spare me the inconsistancies in this little gem I walked into.)
2. A phone can fail the R/F testing in one box, be repeatable in failing at that testing box and then the phone can be taken to another box and pass with flying colors and vice versa.
Ok, please disregard all the problems we already see with the above statements. Focus mostly on number two.
So, what I would like to start with is testing the R/F boxes capabilities first. I already know that the technicians are having an issue. I get that, I see it, I understand, I know etc. My problem, however, sits at the moment that even when following the R/F box manufacturers testing process, the same phone can vary so much between different R/F boxes of the same model that it can yield a pass/fail between the two. I am wondering if this is why the technicians started finding "other methods" to get these phones to pass the R/F testing phases.
So, my first steps, I think, is to test one phone, with the same jig, battery, R/F sim, etc. n number of times and get the results of the R/F testing output. However, is this correct?
Will this give me a Cpk (Cmk) of the R/F testing machine?
How many times should I test a phone on the machine to get a good look at the variance? (I am thinking 10?)
Afterwards I should do a GR&R between the technicians? On each R/F box?
How would you approach this situation?
Thanks for any replies!