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vrf Phase of two oscillations

Question asked by a.kieser on Feb 2, 2005

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"><HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=US-ASCII"><META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2653.12"><TITLE>Phase of two oscillations</TITLE></HEAD><BODY>Hi, does anybody have a solution how to evaluate the phase of two oscillations with the same frequency, which I have in measured (X/Y)-Data-Rows with<UL><LI>Vee</LI><LI>Matlab</LI><LI>and perhaps Excel</LI> </UL>Thank you for an answer in advance.with best regards, Axel. --- You are currently subscribed to vrf as: rsb@soco.agilent.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></HTML>

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VRFuser Feb 1, 2005 5:48 PM

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><TITLE>Phase of two oscillations</TITLE><META content="MSHTML 6.00.2800.1476" name=GENERATOR></HEAD><BODY><DIV>Hello Axel,</DIV><DIV> </DIV><DIV>If I understand correctly, you have a voltage vs time measurement for oscillator 1 and a a voltage vs time measurement for oscillator 2. Both oscillators were measured at the same time i.e. over the same observation interval. Take the FFT of each measurement - you should see a signal component at the expected frequency. Take the complex number returned by the FFT at this frequency and calculate its phase. Do the same for the 2nd signal. The phase difference between the oscillations is then phi1-phi2. Depending upon how many cycles of the oscillation you have captured and also the sampling rate, you may need to consider applying a window to the data prior to the FFT. Both Matlab and VEE have several standard windows.</DIV><DIV> </DIV><DIV>I hope this helps,</DIV><DIV> </DIV><DIV>Andy</DIV><DIV> </DIV><DIV> </DIV><BLOCKQUOTE> <DIV class=OutlookMessageHeader dir=ltr align=left>-----Original Message----- From: a.kieser@francotyp.com [mailto:a.kieser@francotyp.com] Sent: 02 February 2005 09:41 To: VRF Subject: [vrf] Phase of two oscillations </DIV> Hi, does anybody have a solution how to evaluate the phase of two oscillations with the same frequency, which I have in measured (X/Y)-Data-Rows with <UL> <LI>Vee <LI>Matlab <LI>and perhaps Excel </LI></UL> Thank you for an answer in advance. with best regards, Axel. --- You are currently subscribed to vrf as: andy_street@agilent.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com". </BLOCKQUOTE>--- You are currently subscribed to vrf as: rsb@soco.agilent.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></HTML>

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VRFuser Feb 1, 2005 6:12 PM

Blank, it is possible to make a player of rows audio wav that it allows to feel and to see me the audio trace in real Time? or to visualize a bar that slides in real Time on the audio trace previously loaded?

____________________________________________________________
Navighi a 2 MEGA e i primi 3 mesi sono GRATIS.
Scegli Libero Adsl Flat senza limiti su http://www.libero.it

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To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
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VRFuser Feb 1, 2005 5:48 PM
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><TITLE>Phase of two oscillations</TITLE><META content="MSHTML 6.00.2800.1476" name=GENERATOR></HEAD><BODY><DIV>Hello Axel,</DIV><DIV> </DIV><DIV>If I understand correctly, you have a voltage vs time measurement for oscillator 1 and a a voltage vs time measurement for oscillator 2. Both oscillators were measured at the same time i.e. over the same observation interval. Take the FFT of each measurement - you should see a signal component at the expected frequency. Take the complex number returned by the FFT at this frequency and calculate its phase. Do the same for the 2nd signal. The phase difference between the oscillations is then phi1-phi2. Depending upon how many cycles of the oscillation you have captured and also the sampling rate, you may need to consider applying a window to the data prior to the FFT. Both Matlab and VEE have several standard windows.</DIV><DIV> </DIV><DIV>I hope this helps,</DIV><DIV> </DIV><DIV>Andy</DIV><DIV> </DIV><DIV> </DIV><BLOCKQUOTE> <DIV class=OutlookMessageHeader dir=ltr align=left>-----Original Message----- From: a.kieser@francotyp.com [mailto:a.kieser@francotyp.com] Sent: 02 February 2005 09:41 To: VRF Subject: [vrf] Phase of two oscillations </DIV> Hi, does anybody have a solution how to evaluate the phase of two oscillations with the same frequency, which I have in measured (X/Y)-Data-Rows with <UL> <LI>Vee <LI>Matlab <LI>and perhaps Excel </LI></UL> Thank you for an answer in advance. with best regards, Axel. --- You are currently subscribed to vrf as: andy_street@agilent.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com". </BLOCKQUOTE>--- You are currently subscribed to vrf as: rsb@soco.agilent.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></HTML>
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VRFuser Feb 1, 2005 6:12 PM
Mark Correct
Correct Answer
Blank, it is possible to make a player of rows audio wav that it allows to feel and to see me the audio trace in real Time? or to visualize a bar that slides in real Time on the audio trace previously loaded?

____________________________________________________________
Navighi a 2 MEGA e i primi 3 mesi sono GRATIS.
Scegli Libero Adsl Flat senza limiti su http://www.libero.it

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You are currently subscribed to vrf as: rsb@soco.agilent.com
To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".
To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".
To send messages to this mailing list, email "vrf@agilent.com".
If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".
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vrf Phase of two oscillations

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