Kind Attn
I am trying to automate the process of measuring the noise figure of the DUT through the E4404B spectrum analyzer. I have all the SCPI command set to automate the process. The automation will be used for measuring the NF for different Input frequencies.
The process involves the following steps:
i) Calibrate the SA without the DUT in place for all the Input frequencies and note down the calibration data in a file.
ii) Measure the noise figure with the DUT in place for all the input frequencies.
If we observe the above steps, there is a manual intervention of placing the DUT. My query is regarding this: Is there any method in which the calibration data for a particular frequency is stored in the SA (in this case E4404B) for a particular frequency, and so can be recalled when the NF is measured for that particular frequency alongwith the DUT.
I hope I have placed my query in a proper understandable manner. I request the answers from the forum members. If there is a problem in understanding the above issue, I can write again.
Thanks & Regards
Gopi
I am trying to automate the process of measuring the noise figure of the DUT through the E4404B spectrum analyzer. I have all the SCPI command set to automate the process. The automation will be used for measuring the NF for different Input frequencies.
The process involves the following steps:
i) Calibrate the SA without the DUT in place for all the Input frequencies and note down the calibration data in a file.
ii) Measure the noise figure with the DUT in place for all the input frequencies.
If we observe the above steps, there is a manual intervention of placing the DUT. My query is regarding this: Is there any method in which the calibration data for a particular frequency is stored in the SA (in this case E4404B) for a particular frequency, and so can be recalled when the NF is measured for that particular frequency alongwith the DUT.
I hope I have placed my query in a proper understandable manner. I request the answers from the forum members. If there is a problem in understanding the above issue, I can write again.
Thanks & Regards
Gopi
Set up each instrument condition one at a time such as frequency range, points, averaging, BW, etc., and perform the noise source calibration at each one of your test conditions or states. Then save each condition as an instrument state file. Recall the state needed to do the measurement. Since the cal state will be cal’d for each condition, you should be good to go for the DUT measurements. How long is the calibration good for? This is a customer decision, the more frequent the calibrations at each condition, the more accurate the measurement. Most use one week for calibration and state saving processes.
Regards -