My Humax Forum » Freeview HD » FVP 4000T, 5000T

Only C55 dropping out on FVP-5000T

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    Zippy1148

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    I have just bought a FVP-5000t, and done a manual search for all Emley Moor channels, which is definitely where my aerial is aligned to. My HDMI and aerial leads are nowhere near each other, and can’t be separated any further. Everything works OK in the rest of the house as did the DTR-T1000 that the new model replaced.
    All MUX channels are good, producing good reception and never dropping out, except C55. This channel shows a strength of 55-66% depending on the time of day (always 100% quality) but drops out to 0% (& 0%) quality every 5-10secs and alternates in and out. (It doesn’t fluctuate much, its either there or not). This means watching TV channels on that channel keeps freezing or saying no or weak signal.
    Full results below..
    C48 69%, 100%
    C36 55%, 100%
    C33 55%,100%
    C44 48%,100%
    C47 48%, 100%
    C41 71%, 100%
    I have checked all connectors and the co-ax was chased into the plaster a few years ago, so would be a struggle to replace. In the loft I have a 4 or 6 way splitter/amplifier which seems to do the job for all the other rooms.

    | Sat 5 Dec 2020 8:26:02 #1 |
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    Martin Liddle

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    Zippy1148 - 2 hours ago  » 
    All MUX channels are good, producing good reception and never dropping out, except C55. This channel shows a strength of 55-66% depending on the time of day (always 100% quality) but drops out to 0% (& 0%) quality every 5-10secs and alternates in and out. (It doesn’t fluctuate much, its either there or not). This means watching TV channels on that channel keeps freezing or saying no or weak signal.

    The COM7HD mux carried on channel 55 is broadcast at lower power (about a quarter of the power of the other multiplexes). What does the Freeview coverage checker at https://www.freeview.co.uk/corporate/platform-management say about your predicted reception for channel 55? Have you considered whether your aerial is suitable for receiving channel 55?

    | Sat 5 Dec 2020 11:27:37 #2 |
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    Zippy1148

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    C55
    Served 70 Marginal 99 Both green/good coverage

    How do I know if my aerial is suitable for receiving channel 55?

    | Sat 5 Dec 2020 11:59:21 #3 |
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    Martin Liddle

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    Zippy1148 - 50 mins ago  » 
    C55
    Served 70 Marginal 99 Both green/good coverage
    How do I know if my aerial is suitable for receiving channel 55?

    I am not an aerial expert but my guess is you need a wideband aerial; see https://www.aerialsandtv.com/knowledge/aerials/tv-aerial-groups-widebands .If in doubt talk to an aerial installer.

    | Sat 5 Dec 2020 12:54:19 #4 |
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    SSThing

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    The symptoms you describe are exactly what was happening to me, c55 100% or nothing, on/off.
    Hasn't happened since I fitted an attenuator, less than a fiver from Toolstation (but you may need buy a packet of f-connectors if you haven't any in your toolbox).

    | Sat 5 Dec 2020 13:18:52 #5 |
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    EEPhil

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    I've had similar symptoms on UHF channel 55 (COM7) (and 56 (COM8) when it existed). I also found that an attenuator reduced the number of signal losses significantly - but not completely.

    | Sat 5 Dec 2020 13:49:57 #6 |
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    Zippy1148

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    I thought an attenuator reduced the signal. I am already at 55-66%. Also the HD channels that work well are at 71%, and if C55 is broadcast at lower power, why will reducing it further help?

    | Sat 5 Dec 2020 17:00:27 #7 |
  8. grahamlthompson

    grahamlthompson

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    Zippy1148 - 2 mins ago  » 
    I thought an attenuator reduced the signal. I am already at 55-66%. Also the HD channels that work well are at 71%, and if C55 is broadcast at lower power, why will reducing it further help?

    COM 7 is being moved to a single frequency network. If your aerial is picking up com 7 from another transmitter then attenuating the signal may help.

    An aerial with a high front to back polar response and/or locating so your property reduces pick up from the unwanted reception from the other source on the same carrier.

    https://en.wikipedia.org/wiki/Single-frequency_network

    Justin at ATV Aerials in Sheffield may be able to help in suggesting the best aerial

    https://www.aerialsandtv.com/knowledge/aerials/atvs-choice-of-tv-aerials-and-why-we-chose-them

    | Sat 5 Dec 2020 17:08:18 #8 |
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    Zippy1148

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    I have just been in the loft and found a filter before the splitter/amp. It is a LTE/4G filter, consumer channel 59.Are these still needed? I removed it and my C55 strength has increases from 55 to 68%,and it's stopped dropping out. Am I sorted?

    | Sat 5 Dec 2020 20:01:57 #9 |
  10. grahamlthompson

    grahamlthompson

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    Zippy1148 - 1 hour ago  » 
    I have just been in the loft and found a filter before the splitter/amp. It is a LTE/4G filter, consumer channel 59.Are these still needed? I removed it and my C55 strength has increases from 55 to 68%,and it's stopped dropping out. Am I sorted?

    It depends where you are. Most likely you are sorted. Time will tell

    | Sat 5 Dec 2020 21:20:38 #10 |

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