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HP4145A!! Help!!

Question asked by pazmush on Aug 2, 2010
Latest reply on Aug 8, 2010 by nakanok

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I was wondering if anyone knew how to set up the SMU to sweep forewards and backwards in one. Do you use auto sequence and if so do you know how to programme it form a computer. Any information would be great.

Thanks.

Not sure if this is the correct place to post. Please advise.

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MattC Aug 2, 2010 11:13 AM
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Hi,

I am going to e-mail this post to the correct group (as far as I know they are not on our forums yet).
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pazmush Aug 3, 2010 8:51 AM
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Thanks. Will they respond here?
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MattC Aug 3, 2010 3:25 PM
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If they answer me via e-mail, I will post the answer here.
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nakanok Aug 3, 2010 3:28 PM
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Hello,
Since the 4145A is too old product, please allow me if I am sending you the incorrect information.

Unfortunately there is no "double sweep" function on 4145A which is implemented on 4155/56C and B1500A. Therefore you cannot do it on front panel.

I think you can make the program by GP-IB.
You can refer the manual on Agilent.com
http://www.home.agilent.com/upload/cmc_ ... -90000.pdf

Although I cannot send you the perfect program here, you can see the sample program on page 105- on the manual. I think you can make the forward & back sweep program by loop of "DV" and "TI" in system mode.
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pazmush Aug 6, 2010 6:39 AM
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I didn't think you were able to do sweeps in 'user mode'? Do you think it would be ok just letting it set up in the reverse direction?
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nakanok Aug 8, 2010 11:32 PM
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I am sorry but I'm not sure if we can do the sweep measurement in the user mode.
Despite the possibility of sweep in user mode, 4145x will return to 0V or start value after a series of sweep. This means you cannot do the double sweep.
In order to implement the double sweep, you would need to source-measure step one by one. I am sorry this is very primitive program but it is like following.

For i=0 to 1 step 0.1
    DVx (i, xxx, yyy) --- force voltage
    TIx (yyy) ----------- mesure current
next i
For i=1 to 0 step 0.1
    DVx (i, xxx, yyy)
    TIx (yyy)
next i
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HP4145A!! Help!!

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