how to have power sum of 8 dBm

[Dennis_Knutson]

It seems you clicked the Post button before you had a chance to use the message body to explain your cryptic subject.

[stevevantran]

Opp!!! sorry for the 1st time post.

   I have 8 time powers mesurment P1, p2, p3....with dBm, how could I make the power sum on the dBm?

   I have a formula : 10log (10 power of P1/10 + 10 power of P2/10 +10 power of P3/10 +10 power of P4/10 ...) but I do not know to do it in the Labview.

   Thank you

[smercurio_fc]

What have you tried so far? Have you gone through the LabVIEW tutorials?

You should use an array for your 8 values. Feed that to the 10^x function, add the array elements, and then do the 10 * log.

[stevevantran]

 I have all the function but I am not sure I am create the correct VI please take a look my VI and help me to move on.

Thank you

[stevevantran]

Please forget my attracted and Thank you for your help, I have done the VI and working now.   Steve 

[smercurio_fc · Accepted solution]

I don't know what you did in your final VI, but you do not need to handle each number separately if you're performing the same operation on each number. Most functions in LabVIEW are polymorphic, so they accept numbers or arrays. Less functions, smaller diagram.

Message Edited by smercurio_fc on 12-09-2009 09:14 AM

Message Edited by smercurio_fc on 12-09-2009 09:14 AM

[stevevantran]

Thank you very much for your supported and advised.   Steve

[stevevantran]

 Hi all,   I am try to use a Ring to set up 4 different of Freq form 18Hhz to 20Ghz but the ring Max limit only 65535. How could I change the max limit? Or any way we could set up 4 diffirence Freq number for user select any one they want to use. Thank you

[RavensFan]

Duplicate post answered here.