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Strange TV Behavior: No TVP1, TVP2 Signal on DVB-T Receiver - Roof Antenna, 15m Cable Issues?

czesteros1986 62778 47
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #31 17780025
    pikarel
    Level 38  
    The last resort is a factory reset and a "fresh" channel scan.
    If the problem remains - some component of the DVB-T track on the TV is defective; starting from the head, ending with power converters (dry / swollen electrolytic capacitors), the simple solution is the purchase of an external TVB-T decoder.
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  • #32 17780224
    TELMOR_PL
    Level 32  
    Am I wrong or is it just k.27 going crazy. What does a voltage converter have for the correct operation of only one channel?
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  • #33 17781286
    pikarel
    Level 38  
    TELMOR_PL wrote:
    (...) What does a voltage converter have to properly operate only one channel?

    If a faulty converter is overloaded with a signal with a high error rate - it results in "floating" (glitch) of the supply voltage, which leads to the reset of the decoding circuit.

    No wonder; A decoder working with a low quality signal (high error rate) is so hot that, colloquially speaking, it has to survive in a shorter time than a decoder working with a zero error rate.

    Otherwise; I'm not insisting on it, it's just my suggestion, but another TV on this antenna works normally on k27.
  • #34 17781572
    ABLublin
    Photocopiers specialist  
    The opposition is working :)
  • #35 17781868
    TELMOR_PL
    Level 32  
    pikarel wrote:
    If a faulty inverter is overloaded with a signal with a high error rate ....

    Does a colleague know what he is writing?
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  • #36 17784771
    pikarel
    Level 38  
    TELMOR_PL wrote:
    pikarel wrote:
    If a faulty inverter is overloaded with a signal with a high error rate ....

    Does a colleague know what he is writing?

    I know.
    0 errors - zero work of the correction system,
    errors - operation of the error correction circuit, this circuit draws energy during calculations.
    The amount of work is related to the FEC value for the channel and the error amount.
  • #37 17784854
    TELMOR_PL
    Level 32  
    Buddy, the load differences are so insignificant that they can be neglected. This is not the Pentagon's supercomputer processor. If the crossovers were so sensitive, most of the receivers in the country would have "burned" long ago, such signal noise. Mostly during the commissioning of installations, especially the more complex ones, before everything is fine-tuned.
    What about the indications of the meters in such a situation? Are they also "overloaded"?
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  • #38 17786759
    pikarel
    Level 38  
    Slight differences? For whom / what is insignificant?
    Each external decoder working with a "jumping" value of the signal quality
    ends its life at the limit of the warranty or not much later.
    Comparing consumer equipment with a measuring device serves no purpose, is ironic, and very out of place.

    On TV with DVB-T, "pixelosis" on the screen often ends with suspension of work and lack of reception; just pull the plug from the power socket for a few minutes and the TV works again.
    This eventually forces the user to improve the antenna alignment.

    I do not push for conspiracy theories, nor do I force anyone to agree with my opinion and statements.
    I also don't intend to lecture on theory for each of my posts on the forum.
  • #39 17786866
    TELMOR_PL
    Level 32  
    Dear colleague, the quality / noise of the signal is confused, which results in lowering the MER and BER parameters and turning off the head when the critical parameter is exceeded (cannot be watched), ... with the load capacity of the voltage switch. Noise / distortion of the signal, smaller or larger, has no effect or it is negligible on the correct operation of this crossover in terms of load.
    pikarel wrote:
    Comparing consumer equipment with a measuring device serves no purpose, is ironic, and very out of place.

    Sorry, and this measuring equipment is how it measures? Isn't it more sensitive than an ordinary head in "consumer appliances"?
  • #40 17787764
    Anonymous
    Level 1  
  • #41 17787870
    LeDy
    Level 43  
    pikarel wrote:
    TELMOR_PL wrote:
    pikarel wrote:
    If a faulty inverter is overloaded with a signal with a high error rate ....

    Does a colleague know what he is writing?

    I know.

    You've got a shit on something? Most of the equipment should not last a year and work for several years. Correcting signal errors? It's as if you wrote that most of the burned fuel goes to the steering wheel.
    Correcting anything is normal for the hardware, not some imaginary overload.
    The quantity, the performance depends only on how efficient the processor is, not the converter.
    @pikarel
    Quote:
    so i power electricity

    In order not to drag on unnecessary discussions. You write about the power as if it were kW .
    What you wonder about is inherent in the operation of the equipment, the power of the converters has a huge margin and the correct operation depends on the performance of the processor.
    So much for the finishing power of the equipment.
  • #42 17788244
    pikarel
    Level 38  
    I will ask:
    -kol @ TELMOR_PL - indicate where I mention a crossover?
    -kol @ LeDy - what is the error correction? Does this require increased computing power (and therefore electrical power), or is it done by little angels? :)
    The received signal without errors requires only decoding to the form of a stream, the signal on the border of the number of errors requires the missing bits in the stream, and this requires additional circuit work .

    Unstable power converters (from the general 5V, 3.3V, 2.5V to the lowest 1.2V and less) are the biggest bane and the most common causes of faults generated by this instability.
  • #43 18073520
    dr Hakenbush
    Level 1  
    I have a similar problem with TVP signal interference. Panasonic TX P46Z1 TV set.
    Signal dropouts take place in the morning (!). The screen goes black for about 3 seconds (no signal). Indications
    signal quality: 0, signal strength: 10. Antenna gentleman and Panasonic engineer suggested
    problems with transmitting by several transmitters and the appearance of strong reflections. Hmm?
    The second Panasonic at home walks with the old Ferguson with the same DVBT antenna and SAT antenna connected
    and there is everything ok. The engineer also suggested problems with the grounding of connected devices
    to Panasonic. And that would mean doing the entire electrical grid throughout the house from scratch.
  • #44 18073529
    DiZMar
    Level 43  
    dr Hakenbush wrote:
    I have a similar problem with TVP signal interference. ...
    Signal dropouts take place in the morning (!). The screen goes black for about 3 seconds (no signal). ...

    It also happens with me in the morning (RTCN Łosice-Chotycze transmitter). Sometimes it even takes about 10 seconds. Usually on TVP Info, but then also no TVP 1 and TVP 2. No signal displayed. I started to suspect the TV was guilty. Not once, however, I managed to turn on another one that works with a DVB-T decoder. To this TV, only the antenna is connected and a loose HDMI cable used to display the content from the laptop.
  • #45 18073536
    TELMOR_PL
    Level 32  
    The heads have different sensitivity thresholds in different devices (TV, set-top boxes). The standard should be around 48-74dB for DVB-T.
    If the signal coming to the receiver is on the threshold of correct operation, the phenomenon of "floating / fading" of the signal is quite common.
    It all depends on the conditions on the way to the transmitter and the distance that the wave must travel.
    Also, the working conditions may change due to the "aging" of the installation itself (its elements - eg cables, contacts on connectors).
    What is the installation (topography), what elements does it consist of (what antennas, passive and active devices, cable lengths, where the antenna / antennas are installed, etc.).
    Location - installation coordinates or address.
  • #46 18073545
    DiZMar
    Level 43  
    It occurs very sporadically (several times a month, usually a few fades on one day) and it lasts very shortly (a few seconds) so that it is not bothersome. Normal measurement with TV diagnostics is the error level - 0, Signal strength - 100, Signal quality - 100. Sometimes single errors (when there is even a few hundred reception without jamming, with max 2000 - absolute no reception) and the quality and strength of the signal a few below 100.
  • #47 18103156
    Paweł1355
    Level 19  
    I also have a problem with MUX 3 from Śrem. I tried Emma Esse recently on air and in great weather it is OK with cloudy no picture. Other Muxes except 8 work fine. Emma was in the version without an amplifier. What's most interesting, everything works properly on a room antenna the size of 2 postcards with a 26 dB amplifier located in the attic. Miracles or cooo ....
    Tomorrow from a friend I am borrowing a BOSS Telves antenna with an additional power supply to power the active amplifier. I will have a few days for tests because the advertisement shows that this antenna is supposedly the best and if it does not receive it, it will not receive anything. and I have only 28 km to the transmitter.
  • #48 19208863
    black.jack07
    Level 2  
    Hello, I had the described problem of image clipping on all TPV1 / 2 / info / sport etc. I connected the old external Manta decoder and the problem disappeared. The only problem is the lack of a remote control for MANTY DVBT02 and you have to move from the chair to switch the channel.
    I hope I helped someone.
    greetings
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Topic summary

The discussion revolves around a user experiencing intermittent signal issues with TVP1 and TVP2 on a DVB-T receiver connected to a roof-mounted mesh antenna. Despite having a signal strength and quality of 10/10, the user encounters a "no signal" message and black screens intermittently. Various suggestions are made, including checking the antenna setup, considering the age and capabilities of the built-in DVB-T receiver, and the possibility of synchronization issues between transmitters. The user confirms that a newer TV connected to the same antenna does not exhibit these problems, leading to the conclusion that the older Panasonic TV's tuner may be inadequate for handling HD signals. Recommendations include testing with an external DVB-T tuner or a directional antenna to improve reception stability.
Summary generated by the language model.
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