GTMedia v8 Finder Pro 2 and DVB-C

V8 FINDER PRO2 /V8 FINDER2 / BT03 /BT05

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Nike
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Joined: Thu Sep 26, 2024 5:32 pm

GTMedia v8 Finder Pro 2 and DVB-C

Post by Nike »

1.
Cable (cable TV) transmits digital and analog signals.
(Old TVs that do not have a DVB-C decoder can only receive analog signals.)
But if I select CABLE, then after scanning I only get a list of digital channels.
There are no analog channels in the channel list after a full scan!
But analog channels are located on their own frequencies, and digital ones are on their own.
They do not intersect on the frequency spectrum.
Why do I only get digital channels at the output.
There is not a single analog channel among them (this can be easily checked by looking at the frequency of each channel found).
They all belong to digital channels only.
Is it possible to make it so that when selecting CABLE after scanning, all found Analog channels would also be displayed!?

2.
Question about the SPECTRUM item. When displaying the spectrum for Satellites and DVB-T2, you can change the display settings.
But when viewing DVB-C, the viewing mode is only with a step of 8 MHz.
This is very inconvenient.
Especially when there are no analog channels found!
It is necessary to make the ability to view the Spectrum for DVB-C in the new firmware, also with the ability to configure!
With a step of 1 MHz.
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Nike
Posts: 12
Joined: Thu Sep 26, 2024 5:32 pm

Re: GTMedia v8 Finder Pro 2 and DVB-C

Post by Nike »

I didn't understand, are there representatives of GTMedia here or not? If they are present, do they answer all questions or only those that are convenient for them?
I, like many other users, are waiting for answers to these questions.

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Feralkiwi
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Re: GTMedia v8 Finder Pro 2 and DVB-C

Post by Feralkiwi »

These finders are digital only.
Analogue is old tech and not supported.

I use analogue receiver for testing where old analogue is used for retransmission at home or in motels.

I am not suppressed GT Media did not include the old tech in the finders.

Owen

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Nike
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Re: GTMedia v8 Finder Pro 2 and DVB-C

Post by Nike »

And yet.
I don't think it's very difficult to enable analog channel detection in DVB-C mode in the new firmware.
Although this is an old technology, it is still used in many places!
This needs to be done!!!
And accordingly, add a spectrum viewing setting for DVB-C mode with the ability to reduce the viewing step to 1 MHz!!!
Judging by the large number of similar questions about analog channels and views, this is a very popular function!!!

Nike
Posts: 12
Joined: Thu Sep 26, 2024 5:32 pm

Re: GTMedia v8 Finder Pro 2 and DVB-C

Post by Nike »

I tested the spectrum for DVB-C again.
I put the cursor on the approximate location of the analog signal, which I don't have at the moment.
But the spectrum shows an excellent signal of 65 Decibels?!
How is this possible?
The spectrum can't show only the signal with DVB-C frequencies!
This range (60-900 MHz) has all the frequencies, both analog and DVB-C!
Why does the spectrum show only DVB-C and not see it and show nonsense for analog signals?

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CAJE
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Re: GTMedia v8 Finder Pro 2 and DVB-C

Post by CAJE »

The dBμV signal will be seen in the spectrum because it is an signal
To view the programming you need an Analog Demodulator

Nike
Posts: 12
Joined: Thu Sep 26, 2024 5:32 pm

Re: GTMedia v8 Finder Pro 2 and DVB-C

Post by Nike »

I probably explained it poorly.
Please forgive me.
I will try to explain it again.
I have 2 types of signals coming into my apartment via the cable input (cable antenna):
Digital and Analog.
Everything is clear to me with digital signals.
They are located at the frequencies at which digital cable television signals are located.
These frequencies are known and when viewing the DVB-C spectrum, I set the cursor to such a frequency and see the signal value in dBμV.
Everything is correct and I have no questions about it.
But I also know the frequencies at which analog channels are located.
They are also located in this spectrum (60-900 MHz!).
And each analog signal also has its own place on the spectrum (its own frequency).
And here, when trying to view the value of the analog signal at these frequencies, miracles begin.
For example, I know that, say, the 3rd analog channel is broadcast at a frequency of 120 MHz, and the next, 4th analog channel is located at a frequency of 135 MHz.
I place the cursor approximately (since it is impossible to set it precisely with a step of 8 MHz) at 120 and I see that there is a signal and it has a value of 64 dBμV.
Then I slowly move the cursor towards the frequency of 135 and am surprised to see that there is no dip in the signal value between them!
The value is approximately the same throughout the entire interval, 65 dBμV!
Although there are NO signals in this interval!!!
It turns out that this spectrum does not highlight analog frequencies in this Spectrum.
It simply does not see them!
I also have only an analog analyzer (firma "Planar IT").
So, all frequencies in this interval (60-900 MHz) are clearly defined by peaks in the spectrum, and between these peaks there are empty spaces without a useful signal!
I checked the entire spectrum here and the picture is the same everywhere.
Is it really that difficult to make it so that when you place the cursor on this type of spectrum (Spectrum for DVB-C) on a digital channel, the digital signal value for this frequency would be shown, and when you place the cursor on an analog channel, the signal level for this analog frequency would be visible?

IsabellaBrown
Posts: 1
Joined: Thu Nov 14, 2024 6:39 am

Re: GTMedia v8 Finder Pro 2 and DVB-C

Post by IsabellaBrown »

Nike wrote:
Sat Oct 05, 2024 5:52 pm
I probably explained it poorly.
Please forgive me.
I will try to explain it again.
I have 2 types of signals coming into my apartment via the cable input (cable antenna):
Digital and Analog.
Everything is clear to me with digital signals.
They are located at the frequencies at which digital cable television signals are located.
These frequencies are known and when viewing the DVB-C spectrum, I set the cursor to such a frequency and see the signal value in dBμV.
Everything is correct and I have no questions about it.
But I also know the frequencies at which analog channels are located.
They are also located in this spectrum (60-900 MHz!).
And each analog signal also has its own place on the spectrum (its own frequency).
And here, when trying to view the value of the analog signal at these frequencies, miracles begin.
For example, I know that, say, the 3rd analog channel is broadcast at a frequency of 120 MHz, and the next, 4th analog channel is located at a frequency of 135 MHz.
I place the cursor approximately (since it is impossible to set it precisely with a step of 8 MHz) at 120 and I see that there is a signal and it has a value of 64 dBμV.
Then I slowly move the cursor towards the frequency of 135 and am surprised to see that there is no dip in the signal value between them!
The value is approximately the same throughout the entire interval, 65 dBμV!
Although there are NO signals in this interval!!!
It turns out that this spectrum does not highlight analog frequencies in this Spectrum.
It simply does not see them!
I also have only an analog analyzer (firma "Planar IT").
So, all frequencies in this interval (60-900 MHz) are clearly defined by peaks in the spectrum, and between these peaks there are empty spaces without a useful signal!
I checked the entire spectrum here and the picture is the same everywhere.
Is it really that difficult to make it so that when you place the cursor on this type of spectrum (Spectrum for DVB-C) on a digital channel, the digital signal value for this frequency would be shown, and when you place the cursor on an analog channel, the signal level for this analog frequency would be visible?
Digital spectrum analyzers for DVB-C (Digital Video Broadcasting - Cable) are optimized for digital signals, which often have more "peaky" or discrete frequency locations. Analog signals, however, occupy a continuous range around the center frequency. Since DVB-C analyzers typically have a larger RBW to cover broad frequency spans quickly, this can cause them to treat analog signals as continuous noise, displaying similar power levels across a range rather than isolated peaks.
Last edited by CAJE on Thu Nov 14, 2024 9:23 am, edited 1 time in total.
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