frequency measurement using multisim

[rahul1432]

Hi all

i'm new to multisim and i want to ask about how can we measure frequency of analog signal(ecg) using multisim oscilloscope

I will be waiting for you reply

thnx 

[Chen_T]

Hi there,

You can add a measurement probe on a wire to see the frequency displayed.

The measuring probe measures frequency, the video below shows how you can use a probe in Multisim:

 http://www.youtube.com/watch?v=xKEQ3EXEaP8

Hope this helps!:-)

Regards,

[rahul1432]

hello sir sir i am confused because measurement probe is showing the same frequency at the input and output of bandpass filter....

i want to measure the frequency respone of filters

thnx for replying

and i will be waiting for your reply 

Rahul Chandnani

Neduet

[Chen_T]

Hi Rahul,

OK, for a bandpass filter, you should use the AC Analysis under the Simulate menu. Another method is to drag a Bode Plotter and connect it to your circuit.

For the AC Analysis of the filter respnse, this following link might help you.

Configuring an AC Analysis in Multisim

http://www.ni.com/white-paper/12690/en/

NI Multisim: AC Analysis frequency response

http://www.youtube.com/watch?v=tgCPDBtRcso

If using  the Bode Plotter,

MultiSim Bode Plotter

http://www.circuitsmadeeasy.com/index.php?option=com_content&task=view&id=105&Itemid=74

Regards,

[rahul1432]

Thank you very much sir for your timely reply.

one more question bode plot is not showing any waveform in my circuit i am attaching the multisim file of my circuit if you can check and give me some advice i will be very thankfull to you,as i am going to use this design in my fyp.

[Chen_T]

Hi there,

I do not have the Labview instrument you designed, but on your circuit I find that the way you connect the Bode Plotter might be wrong. The IN terminal of the Bode Plotter should be the stimulus INPUT and the OUT should be the RESPONSE OUTPUT. In your circuit you connect the instrument across C3 which is  a high pass filter. I suggest that you connect the OUT to the Pin 6 of the AD620AN and the IN to Pin 3 or 2  of it(it depends on your labview instrument program)

Hope this helps.

Regards,

[rahul1432]

thanx alot sir

ac analysis was helpful and it has solved my problem

thnx