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 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 EMF-390 History Problems		  New Topic  Reply to Topic
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ullix

Germany
1222 Posts
Posted - 07/10/2024 :  03:03:29  Show Profile  Reply with Quote
I looked at the history of an GQ-EMF390v2Re 3.75 device, and found this:

parseGEMF_HIST: aa 55 00 35 00 e0 14 44 23 3d 3d 49 5a 08  595.500     3.500   775122.188
parseGEMF_HIST: aa 55 00 35 00 a0 13 44 23 3d 3d 49 5a 07  590.500     3.500   775122.188
parseGEMF_HIST: 55 aa 18 07 0a 0b 34 1f aa 55 00 34 00 40  2024-07-10 11:52:31
parseGEMF_HIST: aa 55 00 34 00 40 13 44 0b 78 1b 49 5a 08  589.000     3.400   636800.688
parseGEMF_HIST: aa 55 00 34 00 20 12 44 0b 78 1b 49 5a 06  584.500     3.400   636800.688

The data string is 14 bytes long and ends with either "5a 06", or "5a 07", or "5a 08".

According to your GQ-RFC1701 GQ EMF Communication Protocol document, those data strings should be only 12 bytes, so the last 2 bytes aren't supposed to exist! Please, update me: what are they doing in the data string, and what is there meaning?
Reply #1

EmfDev

2360 Posts
Posted - 07/11/2024 :  11:37:53  Show Profile  Reply with Quote
it is for the possible source. you can ignore it.
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Reply #2

ullix

Germany
1222 Posts
Posted - 07/12/2024 :  01:39:51  Show Profile  Reply with Quote
isn't it wasted space of the precious memory, when something irrelevant is included in the records?
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Reply #3

ullix

Germany
1222 Posts
Posted - 07/12/2024 :  03:00:44  Show Profile  Reply with Quote
On the All-In-One display I see RF in units of mW/mē, like "12.355 mW/m2 (0.24-10G)".

However, in the saved data in History, I see RF numbers being orders of magnitude different. Which units are units are used for RF?

Am I correct that the firmware code is using little-endian coding?
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Reply #4

EmfDev

2360 Posts
Posted - 07/12/2024 :  13:11:55  Show Profile  Reply with Quote
it is being used in emfpro when saving history data to .csv file.

I think the rf unit is in pw/cm2
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