AnsweredAssumed Answered

Syncronized point trigger method with external LO with external YIG filter

Question asked by midam on Mar 11, 2014
Latest reply on Mar 13, 2014 by midam

Like • Show 0 Likes0
Comment • 2

Hello,

We have a plan to use external tunnable YIG filter to improve the noise floor of external LO source for noise measurement with PXA.
The issue here is this YIG filter takes some time until it is tuned at LO frequency while we perform swept LO and fixed IF style noise figure measurement.
When it is tuned, this YIG filter module will provide a voltage level that indicate it has been tuned.
I was wondering if there is any solution to use this indicator to syncronize the sweep of PXA at each measurement points. - like point triggering in PNA-X in s parameter measurement sweep.

Thank you.

Steve

No one else has this question

Outcomes

tabbott

Mar 12, 2014 12:19 PM

Hi Steve -

At this time there is no feature on the PXA that will allow you to do this.

The application is specialized, and an Agilent Application Engineer would need to get involved to take a deep dive, and obtain an understanding of the external YIG filter control situation.

This question cannot be addressed via the Agilent Spectrum Analyzer Forum.

Regards -

Actions

midam @ tabbott on Mar 13, 2014 4:42 PM

Hi tabbott,

It looks like the only way I can get around is to set PXA to measure single frequency noise figure instead of frequency swept measurement.
And then our in-house built measurement software will be able to deal with the syncronised frequency sweep with esternal YIG filter. -i.e.
1. set PXA measurement mode to be single instead of swept at one frequency.
2. tune external YIG filter and wait until it is tuned.
3. Measure noise figure at this frequency with PXA.
4. move to the next frequency => set PXA single frequency measurement to this new frequency.
.....continue until the last frequency point measured.

Then our measurement software can gather all the noise figure at each frequency and generate one swept frequency result file.

I assume as long as the loss & ENR table and PXA calibration cover the sweep range, only one of these table and calibration will be enough.

Thanks.

Steve

Actions

2 Replies

tabbott Mar 12, 2014 12:19 PM
Mark Correct
Correct Answer
Hi Steve -

At this time there is no feature on the PXA that will allow you to do this.

The application is specialized, and an Agilent Application Engineer would need to get involved to take a deep dive, and obtain an understanding of the external YIG filter control situation.

This question cannot be addressed via the Agilent Spectrum Analyzer Forum.

Regards -
Like • Show 0 Likes0
Actions
- midam @ tabbott on Mar 13, 2014 4:42 PM
  Mark Correct
  Correct Answer
  Hi tabbott,
  
  It looks like the only way I can get around is to set PXA to measure single frequency noise figure instead of frequency swept measurement.
  And then our in-house built measurement software will be able to deal with the syncronised frequency sweep with esternal YIG filter. -i.e.
  1. set PXA measurement mode to be single instead of swept at one frequency.
  2. tune external YIG filter and wait until it is tuned.
  3. Measure noise figure at this frequency with PXA.
  4. move to the next frequency => set PXA single frequency measurement to this new frequency.
  .....continue until the last frequency point measured.
  
  Then our measurement software can gather all the noise figure at each frequency and generate one swept frequency result file.
  
  I assume as long as the loss & ENR table and PXA calibration cover the sweep range, only one of these table and calibration will be enough.
  
  Thanks.
  
  Steve
  Like • Show 0 Likes0
  Actions

Syncronized point trigger method with external LO with external YIG filter

Outcomes

Related Content

Recommended Content