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"Steps" in the spectrum every 10 MHz

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(@jakobster)
Active Member
Joined: 13 years ago
Posts: 9
Topic starter  

Hello,

I am measuring something using near-field probes, preamp, and HF-60105. I plot the average of the sweeps and get what is depicted in the attached screenshot. How can I get rid of the "steps" in the level appearing every 10 MHz?

Regards


   
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(@moderator)
Noble Member Admin
Joined: 14 years ago
Posts: 1044
 

These are the dBi values of the probe which change every 10MHz.
You can avoid those by using dBm instead of field strength.

Snip


   
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(@jakobster)
Active Member
Joined: 13 years ago
Posts: 9
Topic starter  

But I was already measuring dBm as you can see on the vertical axis.


   
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(@moderator)
Noble Member Admin
Joined: 14 years ago
Posts: 1044
 

You also have to remove the antenna calibration setup.

Snip


   
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(@jakobster)
Active Member
Joined: 13 years ago
Posts: 9
Topic starter  

I did not have any calibration settings set.


   
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(@moderator)
Noble Member Admin
Joined: 14 years ago
Posts: 1044
 

In this case it is simply the noise level test which is done every 10MHz to give you more dynamic.

Snip


   
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