Hi I m a new member. I m a testing technician and I use E8801A model Agilent PNA.
Can anyone please explain how to do the phase measurment and delay using this VNA in order to phase match cable assembly in a group of cable assemblies.
I briefly explains what I did.
1.Start Freq 360 MHz Stop 380 MHz
2.VNA was set to do S11,S21,S22, and S21 phase measurment.
3.Measurment: S21, Format: Phase, Marker 370 MHz
4.Did full 2 port Calibration and connect DUT (Cable).
5.Displayed SAW tooth form graph.
6.On electrical delay menu following settings were displayed
Delay =0ns
Velocity factor = 1 (actual cable has VF 0.77)
Cuttoff frequecy 450000Hz
Coax was ticked
Wave guide was unticked
7.Phase offset menu setting: 0
8. selected marker function menu and select delay.
9. A flat line was now oberserved with phase value in degrees. What will be the explanation of this value oberserved. Why it changes every time I select marker function menu and press delay tab.
9. Now electrical delay menu displayed 6.5ns.
How do I use or interpret this graph to phase match cable assemblies to each other within +/-2.5 degress.
Looking forward to anyone's reply with detailed explanation
Thanking you
Can anyone please explain how to do the phase measurment and delay using this VNA in order to phase match cable assembly in a group of cable assemblies.
I briefly explains what I did.
1.Start Freq 360 MHz Stop 380 MHz
2.VNA was set to do S11,S21,S22, and S21 phase measurment.
3.Measurment: S21, Format: Phase, Marker 370 MHz
4.Did full 2 port Calibration and connect DUT (Cable).
5.Displayed SAW tooth form graph.
6.On electrical delay menu following settings were displayed
Delay =0ns
Velocity factor = 1 (actual cable has VF 0.77)
Cuttoff frequecy 450000Hz
Coax was ticked
Wave guide was unticked
7.Phase offset menu setting: 0
8. selected marker function menu and select delay.
9. A flat line was now oberserved with phase value in degrees. What will be the explanation of this value oberserved. Why it changes every time I select marker function menu and press delay tab.
9. Now electrical delay menu displayed 6.5ns.
How do I use or interpret this graph to phase match cable assemblies to each other within +/-2.5 degress.
Looking forward to anyone's reply with detailed explanation
Thanking you
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PNA Trace Math Operations:
http://na.tm.agilent.com/pna/help/WebHe ... ations.htm