Thanks Andrew
Yes I see what you mean about the noise floor. Why is it that the noise floor changes? I guess this has something to do with the amplifier circuitry and the sensitivity / gain required for the new reference level?

Is there a way to control the scale of the horizontal frequency axis so that it is logarithmic rather than linear?

Can you also please confirm that my understanding and implementation of the antenna factors is correct (by way of comparing the attached csv with the antenna spec’s also attached)?

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Thanks

I am also having difficulty setting up the limit lines.
For example in the attached screenshot I have used -67dB to generate a 40dB limit line. I see that the Limit Line points are specified as ‘dBm’ but what does that mean? If it means dB relative to 1mV then I would subtract 60 to convert from dBuV to dBmV (40dBuV would become -20dBmV). How does 40dBuV/m convert to -67dBm ?

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[ghuxtable]

At risk of revealing my limited knowledge…
Attached is the test lab result I am trying to replicate.
How can I set up Spike to replicate the scale (dBuV/m) for example?
And show same limit lines?
Showing my lack of experience here.

• This reply was modified 4 years, 3 months ago by ghuxtable.

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I have also noticed in the Spike manual, section 4.8, that ‘Precompliance measurements are available for BB series and SM series devices’. This answers my other query which I need not now ask – that being why was ‘EMC Precompliance’ greyed out and not available in my installation of Spike.
So why is it that the SA series devices do not have this option?

I also have access to one of these antennas:
BicoLOG® 20100 E
Datasheet attached.
Would the SA124B and this antenna be a good pair for my purposes?

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