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Author Topic: Very similar to my Hlog  (Read 815 times)

konrado5

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Very similar to my Hlog
« on: June 03, 2018, 03:01:28 AM »

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burakkucat

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Re: Very similar to my Hlog
« Reply #1 on: June 03, 2018, 05:30:05 PM »

Yes, I agree. They do look similar.
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konrado5

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Re: Very similar to my Hlog
« Reply #2 on: June 03, 2018, 09:17:31 PM »

Yes, I agree. They do look similar.
Unfortunately they don't say about cause. It seem they show it as normal Hlog. :) Perhaps there is something related to measurement and some power output profiles.
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burakkucat

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Re: Very similar to my Hlog
« Reply #3 on: June 03, 2018, 09:26:42 PM »

Perhaps you could contact the company and ask if they have a record of the characteristics of the circuit from which that Hlog plot was obtained?

I wouldn't go as far as referring to that plot as a "normal" example. I suspect it was just the first one that was available to the writer of the Instruction Manual.
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konrado5

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Re: Very similar to my Hlog
« Reply #4 on: June 03, 2018, 10:52:14 PM »

It is good idea. I'm going to PM you about this matter.
« Last Edit: June 03, 2018, 11:05:12 PM by konrado5 »
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konrado5

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Re: Very similar to my Hlog
« Reply #5 on: June 03, 2018, 11:50:18 PM »

On the first page of this PDF there is some graph (TDR graph?). I suspect this is graph from the same circuit.
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burakkucat

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Re: Very similar to my Hlog
« Reply #6 on: June 04, 2018, 12:02:28 AM »

On the first page of this PDF there is some graph (TDR graph?).

It is a TDR representation. If you look at the central selector switch, it is set to "TDR". Whether it is just a mocked-up image, for the front cover of the Instruction Manual, I have no idea.
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konrado5

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Re: Very similar to my Hlog
« Reply #7 on: June 04, 2018, 12:04:06 AM »

What is impairment noticeable on this TDR?
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burakkucat

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Re: Very similar to my Hlog
« Reply #8 on: June 04, 2018, 12:13:09 AM »

If it was a real TDR trace, I can't think of any defect that might be responsible for its production. However I suspect it is just an image that was created to "look good" on the front cover of the Instruction Manual.
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ejs

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Re: Very similar to my Hlog
« Reply #9 on: June 04, 2018, 08:00:07 PM »

The shape of the HLog graphs may be similar, but the values on the vertical axis are quite different. Assuming the units are the same, one would be quite a lot below the other if they were both drawn on the same graph.
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konrado5

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Re: Very similar to my Hlog
« Reply #10 on: June 04, 2018, 09:21:27 PM »

I see similar pattern (barely noticebale but noticeable) on other circuit Hlog. There is a dip on tone 55 and graph is more bent from tone 100 to tone 200.
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konrado5

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Re: Very similar to my Hlog
« Reply #11 on: June 09, 2018, 12:13:38 AM »

burakkucat: do you see this pattern?
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burakkucat

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Re: Very similar to my Hlog
« Reply #12 on: June 09, 2018, 12:29:19 AM »

I assume you are asking if I see something similar in the Hlog plot for my own circuit? My answer to that question is "no".
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konrado5

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Re: Very similar to my Hlog
« Reply #13 on: June 09, 2018, 01:05:13 AM »

I assume you are asking if I see something similar in the Hlog plot for my own circuit? My answer to that question is "no".
No. I ask if you see on hlogdertyh.png the same pattern (although barely visible) as on the hlogwithoutmask.png I see a dip on tone 55 on hlogdertyh.png and it seems to me that  graph is  more bent from tone 100 to tone 200.
« Last Edit: June 09, 2018, 01:08:32 AM by konrado5 »
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burakkucat

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Re: Very similar to my Hlog
« Reply #14 on: June 09, 2018, 06:49:49 PM »

Sorry, I misunderstood. However I have now looked at the two separate plots and would not say that they could be related.  :no:

If you have the two data sets that are used to produce those two plots, why not just perform a sideways difference on them? Something like --

$ sdiff hlog_data-1.txt hlog_data-2.txt
 . . .
 . . .
 . . .
$


Human beings have the ability "to see" visual effects that are really not there.
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