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TOPIC: Ricalibrazione frequenza....

Ricalibrazione frequenza.... 07 May 2022 21:34 #16

  • N8SDR
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Anto66 wrote:
nothing was at 0 offset, these are my default parameters

You show nothing or list nothing as your default parameters

Lets see a screen shot of your parameters please?

Aslo I have asked several times? WHAT MODE is it you say is not correct on TX versus RX:
73 Rick
Last Edit: 07 May 2022 21:38 by N8SDR.
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Ricalibrazione frequenza.... 07 May 2022 21:54 #17

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the default parameters are those in the photo, in TX they are displaced and there is no way by acting on the FREQUENCY COEDFICIENT to center sdr at 0 reduction
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Ricalibrazione frequenza.... 07 May 2022 22:01 #18

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Anto66 wrote:
the default parameters are those in the photo, in TX they are displaced and there is no way by acting on the FREQUENCY COEDFICIENT to center sdr at 0 reduction

NO No Look to the LEFT of where the calibration is:
there you see DIGL and DIGU boxes

DIGUModulatorOFFSET1.jpg



are you having this Problem while your using DIGU MODE? or some Digital Mode?
That is the screen shot like attached and circled I want to see from you
also a video showing what your saying TX isn't same as RX

AGAIN I am asking What MODE ARE YOU USING WHEN YOU SAY THE TX isnt the SAME AS THE RX?

Also what is your callsign please?
73 Rick
Last Edit: 07 May 2022 22:09 by N8SDR.
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Ricalibrazione frequenza.... 07 May 2022 22:18 #19

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obviously we don't understand each other! I can not do the calibration I am shifted in frequency, I do not understand what xh please excuse me! I don't use the Digu, I have the default parameters (SPEECH mode)
could we connect xon Team Viewer?

do you have Skype?


IW8FAY

request: why do you have the SSB taps at 3000?
Last Edit: 07 May 2022 22:44 by Anto66.
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Ricalibrazione frequenza.... 07 May 2022 23:01 #20

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Anto66 wrote:
obviously we don't understand each other! I can not do the calibration I am shifted in frequency, I do not understand what xh please excuse me! I don't use the Digu, I have the default parameters
could we connect xon Team Viewer?

do you have Skype?


IW8FAY

request: why do you have the SSB taps at 3000?

Regardless if your shifted or not:
If your using 1496.000.000 as your KNOWN GOOD FREQUENCY:

Put the SDR 2 DX in Standard AM mode and place it on 14.996.000 ( I think that is the frequency you said your using as a calibration source)

Now listen to the tone there and using different values in the Calibration (Frequency Correction) box
lets start with this: 0.000130 and press WRITE
Now listen leaving the radio on 14.996.000 in AM mode is the frequency Shift Closer zero beat tone or move further away
Going from what you find above adjust the LAST 3 digits of the correction, if closer try 0.000140 and press write
If it made it worse then try 0.000120 and press Write
again listen and adjust from there until you get it on frequency
Each time you enter a New Number in the frequency correction box you press write and listen to see if it is Closer to 14.996.000 or not and keep adjusting

I do not use TeamViewer nor Skype
It really isn't difficult to adjust it is just time consuming and takes a good

as for why I use 3000 ( the higher the number the tighter the filtering) tighter filtering means less IMd esp. since I like to run wider TX bandwidths on SSB
For digital modes it can be less, but for SSB I want clean signal as I can produce
this also requires a PC that can keep up with task of tighting the filtering as well as it requires more system resources to do so

So leaving radio frequency on 14.996.000 even it that is not on frequency you need to have that value in there so it can write the correction to place the radio on that frequency when you are done

Using AM mode is in most cases easier to hear if you Zero Beat or if your still off frequency as your will hear heterodyning on the signal like in the video I share for you earlier.
Just Rember when you change the correction value you must press WRITE in order to process the change and then listen carefully and adjust again until you reach your goal

when you are done , placing your radio on 14.996.000 will produce the correct frequency going forward and you will be good
73 Rick
Last Edit: 07 May 2022 23:02 by N8SDR.
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Ricalibrazione frequenza.... 07 May 2022 23:11 #21

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I'm just doing the calibration, only I do it in CW! but the problem is that it doesn't hit! I do not know why...


nkn I understand petche you set the taps to 3000 .... is modulation better?
Last Edit: 07 May 2022 23:12 by Anto66.
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Ricalibrazione frequenza.... 08 May 2022 00:10 #22

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Anto66 wrote:
I'm just doing the calibration, only I do it in CW! but the problem is that it doesn't hit! I do not know why...


nkn I understand petche you set the taps to 3000 .... is modulation better?


DO IT IN AM MODE!
73 Rick
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Ricalibrazione frequenza.... 08 May 2022 11:29 #23

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I do the calibration correctly, the problem is that you do not take the changes and you just can't center well.
Last Edit: 08 May 2022 11:30 by Anto66.
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Ricalibrazione frequenza.... 08 May 2022 16:52 #24

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Anto66 wrote:
I do the calibration correctly, the problem is that you do not take the changes and you just can't center well.

I certainly do not agree

It works as described and you can center it well it just takes time and a good ear, once it is zero beat your on frequency.

Here are a couple videos this is when it is correct , again you use AM mode to calibrate and listen for tones upper and lower you want to Zero beat those tones when you do it will sound and look like this: it takes a bit of time and a good ear, but the method does work and you can CENTER the panadapter on frequency as I have shown here: in V2 and in V3

drive.google.com/file/d/1DlSHfLgiCvHd657gJ-_EaPIP-bts3oRL/view?usp=sharing

drive.google.com/file/d/12RfZxhr7FMXQVcx9XP4Z0VK-qEkaEfJ9/view?usp=sharing


You need to adjust the frequency calibration (correction numbers again as I have pointed out do large steps at first so you can figure out what direction you need to move) up or down to get closer to a Zero Beat. pressing Write each time you change the correction value- then as you get closer you use smaller steps and continue till your on frequency

Once on frequency the pointer is center and the tones are zero beat!

If it is not taking changes only thing, I can think is your DATA FILE is corrupted
Also, you mentioned TX is not same after calibration to RX, it's a TXCO I doubt that unless you have RIT or XIT turned on!
73 Rick
Last Edit: 08 May 2022 17:08 by N8SDR.
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Ricalibrazione frequenza.... 09 May 2022 10:58 #25

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I have neither Rit nor Xit active! I can't explain why reception is different from transmission. I had to add 160 to be at zero beat but then in TX I moved a bit !!
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Ricalibrazione frequenza.... 09 May 2022 14:51 #26

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Anto66 wrote:
I have neither Rit nor Xit active! I can't explain why reception is different from transmission. I had to add 160 to be at zero beat but then in TX I moved a bit !!

How do you know your TX is off from your RX?

Please share a video showing this?
73 Rick
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