My Humax Forum » Freeview HD » Aura UHD

Failed Channel Scan

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    Viffergb

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    A few days ago the picture on broadcast channels started to break up (pixelations and sound dropouts) so I decided to do an automatic scan. Now it only captures a few channels if I'm lucky and no HD ones!

    When doing a Signal Test, only Tuner 1 shows any activity with strength not that good and quality virtually non existent. Should I see readings on Tuners 2 and 3 as well? Such a long time since I checked, I can't remember if it should. If it should show on all three, does that signal a fault with box?

    If I connect the aerial input direct to the tv (LG) it picks up all the channels fine, so I don't believe I have a problem with the aerial.

    Looking at signal strength and quality readings on the tv they all look fine, but does that just mean that the tv is coping better with a poorer quality incoming signal than the Aura box?

    Just want to determine if I need to get an aerial engineer to come and check my installation, or is it a problem with the Aura box itself. I have to confess that I'm not impressed with the Aura as it crashes quite frequently, especially on catch up, but also when viewing direct broadcasts. We have experienced quite a few scheduled recording failures due to the crashes.

    Anyone any suggestions as to what I should try, please?

    TIA

    | Fri 29 Nov 2024 23:59:15 #1 |
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    VitaminD

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    If you are only watching one channel on the Aura only Tuner 1 will show a signal.
    Tuners 2 and 3 will show a signal when you are recording programmes broadcast from a different mux (multiplex)
    other than Tuner 1.

    If your TV is receiving signals then there is no point of going to the expense of getting a "professional" in.

    Make sure the aerial cable to the Aura is not touching or anywhere near the HDMI cable as this can cause the
    signal to the Aura to drop out/ pixellation. Yes I know the HDMI port and the aerial input are next door to each
    other but that's on Humax for poor design, just make sure the cabling for both are not touching or within close
    range until they enter the Aura.

    The Aura seems to have been provided with Tuners that are of poorer quality than their previous devices.
    For example my Aura is first in line to receive a signal from my aerial but yet registers less signal strength and
    quality than the next box on the RF loop a Humax 5000T and then the TV itself which register higher values.

    I sometimes find that the Aura loses signal but the TV using its own tuner does not, when this happens I take the
    aerial cable from the Aura and reseat it making sure the solid copper core of the cable is slightly protruding in order
    to make the best connection to the Auras RF input.

    As for the crashes well this happens on my Aura as well often it will decide it has had enough and restart itself
    or go for a full power down and restart. There doesn't seem to be a catalyst for this as my box can often run for
    days without it restarting and then there are days when it will restart several times in one day.
    This is all part of the magic of owning the Aura that was knowingly released full of faults many which were addressed
    9 months after it was released in August 2021, its last major firmware/ software update.

    There is speculation that Humax are to release a 'major' firmware/ software update in the New Year but no real details
    as far as I am aware of have been released.

    | Sat 30 Nov 2024 5:17:12 #2 |
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    Viffergb

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    Hi, and apologies for not acknowledging your reply sooner, but I spent a lot of time yesterday trying to get to the bottom of the problem, and then wanted to allow some time to check if what I found was indeed the cause.

    First off many thanks for your comprehensive response as to what I needed to check and try.

    I made sure the HDMI cable was not touching both the RF IN and RF OUT, and at first I thought (probably imagined) that things had improved. This was around 8 to 9am Saturday morning, but as time passed and I tried auto scanning of broadcast channels (trying both United Kingdom and Other Region settings) it became clear that things hadn't really improved.

    When checking 'Signal Strength' on Aura on numerous occasions, the signal strength was always showing as 100%, whilst the 'Signal Quality' was jumping about all over the place like a yo-yo, somewhere between 0% and at best approx 20%, and often attempting to stabilise at around 10%. Bearing mind what you said about the poorer quality tuners fitted to the Aura, that was most likely the cause of my issues.
    All the while the tuner on our LG tv was working fine, however, the small and very old Samsung 19" tv in the kitchen has also been displaying a lot of picture and sound breakup at around (I think) the time the Aura started playing up. I was finding it difficult to try and narrow down the exact cause of the problem, and had in fact ordered an internal aerial, which arrived on Friday evening, for me to try and ascertain whether I really did have some sort of issue with the external aerial. I managed to get the tv (SD only) in the kitchen back to working as it should using the internal aerial, but was unable to get a good enough signal to test on the Aura or direct to the LG as the cable run just wasn't quite enough to allow me to physically place it where I'd had it when trying the Samsung tv.

    I was fast running out of ideas, but as we have 4 aerial sockets throughout the property, 1 UHF and 1VHF where Aura and LG are, 1 UHF for the Samsung in the kitchen, and 1 unused in a bedroom, I decided to take a look at the Labgear 4 Way Distribution Amplifier in the loft. After a lot of swapping around of outputs, which made no difference, I by-passed the box completely and just connected the aerial to the UHF feed to the the Aura and LG.

    BINGO!!! Now all working fine with 98% and 100% 'Signal Strength' and 'Signal Quality' respectively displayed on the Aura. I also made sure the LG was still working fine with a direct input RF IN, and it does.

    Have ordered a replacement Labgear box which arrives tomorrow.

    Thanks again for your help, and thought you might like to hear what the problem does appear to be.

    | Sun 1 Dec 2024 17:16:19 #3 |
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    Martin Liddle

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    Viffergb - 6 hours ago  » 
    Have ordered a replacement Labgear box which arrives tomorrow.

    Does it have variable gain? Your observation that the Aura was always at a 100% signal strength suggests to me that the signal is too strong (causing tuner saturation) and needs attenuating.

    | Sun 1 Dec 2024 23:28:25 #4 |
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    Viffergb

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    It doesn't, and whilst I understand your point concerning too strong a signal, I believe it was more a problem with the actual quality of the incoming signal. I say this because we had been using the existing Labgear for the past 13 years without any issues or need to attenuate the signal, and then the problem suddenly manifested itself a week or so ago.

    Although the replacement has arrived, I forgot to order the 'F Type Connector Sockets to RF Coaxial Aerial Adapters'. They should be arriving in a few days, so I guess we'll soon see if the Labgear was the problem.

    | Tue 3 Dec 2024 14:49:18 #5 |
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    Viffergb

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    Found time to install the replacement Labgear Distribution Amplifier yesterday. The problem appears fixed, on both the tv in the kitchen and the Aura box, which is now showing 100% on both Signal Strength and Quality.

    Seems our old Labgear device was the cause of the problem.

    | Fri 6 Dec 2024 20:46:09 #6 |

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