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 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 GQ390 RF(standard/Sensitive)
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gvero

3 Posts

Posted - 12/26/2019 :  13:14:13  Show Profile  Reply with Quote
Hello, I am slightly confused between this two, which one is more adequate to get
realistic measurements of harmful exposure, "sensitive" mode is showing like x20-30 over
standard way of measuring...

regards
Reply #1

EmfDev

2132 Posts

Posted - 12/26/2019 :  13:41:41  Show Profile  Reply with Quote
Hi gvero, from from the faq section: "The Standard mode on this meter is referring to average reading. Which is the reading been calibrated to a RSM reading standard. The Sensitive mode mostly reports RF pulse peak value. Most signals today are digital. Digital signals are RF pulse signal (composed of a series of short bursts pulses). The amplitude of pulses can differ by many times, sometimes more than 100 times."
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Reply #2

gvero

3 Posts

Posted - 12/29/2019 :  09:38:59  Show Profile  Reply with Quote
quote:
Originally posted by EmfDev

Hi gvero, from from the faq section: "The Standard mode on this meter is referring to average reading. Which is the reading been calibrated to a RSM reading standard. The Sensitive mode mostly reports RF pulse peak value. Most signals today are digital. Digital signals are RF pulse signal (composed of a series of short bursts pulses). The amplitude of pulses can differ by many times, sometimes more than 100 times."



Yes, I read that before posting here since I am not sure which route to follow from that description, shall I stay with sensitive mode since most of signal is digital these days?

Edited by - gvero on 12/29/2019 11:12:52
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Reply #3

paul

United Kingdom
54 Posts

Posted - 12/29/2019 :  11:26:17  Show Profile  Reply with Quote
To get "realistic measurements of harmful exposure" it is best
to use RF Browser mode.Which is not affected by Sensitive or Standard.
Vertical and All In One are a bit slow for true,fast peak digital
measurements.
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Reply #4

EmfDev

2132 Posts

Posted - 12/30/2019 :  10:32:19  Show Profile  Reply with Quote
Yes we prefer standard. The reading on standard is from the data in RF Browser.
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Reply #5

gvero

3 Posts

Posted - 01/12/2020 :  07:42:02  Show Profile  Reply with Quote
Thank you very much to both of you.. cheers
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Reply #6

taekotra

7 Posts

Posted - 01/16/2020 :  22:11:12  Show Profile  Reply with Quote
Does anyone know how that value is calculated when in Sensitive mode?

The manual says it represents "Total in all bands" (in Standard or Sensitive I assume).
So is it collecting various peaks from various bands and summing the densities?
Or is it taking the peak density in any band and summing the pulses at that peak?
Or something else...?


Edited by - taekotra on 01/16/2020 23:02:06
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Reply #7

EmfDev

2132 Posts

Posted - 01/17/2020 :  10:21:27  Show Profile  Reply with Quote
Hi taekotra, the sensitive is taking the peaks in all bands including the 2.4GHz - 2.5GHz and 240-1040MHz. While the standard is taking average.
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Reply #8

taekotra

7 Posts

Posted - 01/17/2020 :  14:29:32  Show Profile  Reply with Quote
quote:
Originally posted by EmfDev

Hi taekotra, the sensitive is taking the peaks in all bands including the 2.4GHz - 2.5GHz and 240-1040MHz. While the standard is taking average.



This seems not to be true because the display claims ".24 - 10Ghz" and the manual stating "up to 10Ghz". I understand that it's only the RF Spectrum mode that is limited to the 2.4GHz - 2.5GHz and 240-1040MHz bands.

So Sensitive should be taking the peaks at various bands (which ones?) from the whole 240Mhz - 10Ghz range. Can you confirm?

Edited by - taekotra on 01/17/2020 15:18:46
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Reply #9

EmfDev

2132 Posts

Posted - 01/17/2020 :  15:53:34  Show Profile  Reply with Quote
It is taking peaks in all bands from 240MHz - 10GHz (including peaks from 2.4GHz - 2.5GHz and 240-1040MHz bands).
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Reply #10

taekotra

7 Posts

Posted - 01/17/2020 :  16:25:34  Show Profile  Reply with Quote
quote:
Originally posted by EmfDev

It is taking peaks in all bands from 240MHz - 10GHz (including peaks from 2.4GHz - 2.5GHz and 240-1040MHz bands).



Do you mean this range is divided into 4 bands, then?
240 - 1040MHz
1041Mhz - 2.399Ghz
2.4 - 2.5GHz
2.501 - 10Ghz

Sensitive mode takes the peaks from these 4 bands and sums them? Or are there more bands?

Edited by - taekotra on 01/17/2020 16:27:55
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Reply #11

EmfDev

2132 Posts

Posted - 01/17/2020 :  17:01:21  Show Profile  Reply with Quote
It has a 240-10GHz general band but it also gets the 240 and 2.4GHz bands.
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Reply #12

taekotra

7 Posts

Posted - 01/17/2020 :  17:25:56  Show Profile  Reply with Quote
quote:
Originally posted by EmfDev

It has a 240-10GHz general band but it also gets the 240 and 2.4GHz bands.



How many peaks does Sensitive mode take per sample?
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Reply #13

EmfDev

2132 Posts

Posted - 01/21/2020 :  10:36:05  Show Profile  Reply with Quote
More than 1000 peaks every second.
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Reply #14

taekotra

7 Posts

Posted - 01/21/2020 :  22:11:26  Show Profile  Reply with Quote
quote:
Originally posted by EmfDev

More than 1000 peaks every second.



From this set of 1000+ peaks, what manipulations are applied to generate the "Total in all bands" reading?

Edited by - taekotra on 01/21/2020 22:42:34
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Reply #15

EmfDev

2132 Posts

Posted - 01/22/2020 :  10:23:28  Show Profile  Reply with Quote
I am not sure, I need to check this one.
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Reply #16

taekotra

7 Posts

Posted - 01/23/2020 :  17:25:13  Show Profile  Reply with Quote
quote:
Originally posted by EmfDev

I am not sure, I need to check this one.



Thanks, looking forward to it!
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Reply #17

user18

4 Posts

Posted - 01/26/2020 :  08:34:18  Show Profile  Reply with Quote
quote:
Originally posted by taekotra

quote:
Originally posted by EmfDev

I am not sure, I need to check this one.



Thanks, looking forward to it!



I am also interested in this one, I really get curious when Sensitive reading differs from Standard by a lot (it does not always differ that much).

BTW, I have neve seen a stable Sensitive RF reading below ca. 2.5 mW/m2, that seems to be a kind of minimum value.
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Reply #18

taekotra

7 Posts

Posted - 05/28/2020 :  17:06:19  Show Profile  Reply with Quote
We are still looking for an answer.

In Sensitive Mode, the GQ390 is taking 1000+ peaks/second.

Again, the question is:

----- How is the "Total In All Bands" value generated? What calculation is applied to the 1000+ peaks? -----




Edited by - taekotra on 05/28/2020 17:29:30
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