sony is out of my budget ><

yeah 32 should be okay
i have research ~ plan to buy a philips
hopefully it works well

Is these type of antenna works for dvb-t2? For freeview.
https://shopee.com.my/-Ready-xingher-Digita...5412.5200935941
https://shopee.com.my/TV-Antena-Digital-HDT...6927.2558470832

This post has been edited by nyunyu: Oct 21 2019, 08:02 PM

For indoor antenna, better DIY a folded-dipole or loop and connect with good RG6 cable and plugs. From my experience, this works better than the antenna bought from supermarket.

Restacking will help for several reasons, but interference levels rise if anything at lower frequencies.

Path loss from the transmitter to your home is lower
Cable losses lower
Rain and wet roof loss lower
Receiver sensitivity usually better

This is a good summary of what has gone wrong with hdmi with measurements
https://interferencetechnology.com/hdmi-cables-emi/

Hmmm... I have some questions wanna ask...
<600MHz = frequencies lower than 600MHz (example 470-606MHz)
>600MHz = frequencies above 600MHz (example 606-742MHz)

1. If the <600MHz part of UHF frequency seems to bring more benefit than >600MHz, and once analogue TV has fully switched off, what are the other benefits of using >600MHz then?
Seems that >600MHz brings more disadvantages than advantage to me.

And why some other countries (assuming already complete ASO), still uses >600Mhz frequencies for DTT if using frequencies that are <600MHz brings more benefit?

2. What are the other things that is on <600MHz which could potentially cause interference? Wireless microphones?

3. Once 700MHz is used for 4G/5G, how would it affect viewers that uses UHF antenna that supports almost entire range of UHF TV frequency (e.g. 470-869MHz)?
If the DTT frequencies is re-stacked to <600MHz, will 4G/5G signal from 700MHz band still causes interference to those DTT reception?

4. What if someone can't get digital TV signals yet not sure what's the cable type used, especially if the cable jacket doesn't have any labels like 3C-2V, 5C-2V or RG6 or RG6/U?
Not everyone knows how, and willing to identify/measure the cable diameter like that. If this happens, how would you advise the person to check what's the cable type?
(At least if the person knows that if it's RG6 type, then at least it is safe to assume the cable type is ideal, and unlikely experience much cable loss like 3C-2V type (unless cable is damaged).

1) The only reason for using >600MHz is shortage of channels, eg Singapore is currently allocated all of the 500MHz block - a ridiculous situation with DTTV
The USA is already reallocating above 620 MHz for other services

2) Cables tend to radiate more in the VHF than the UHF due to their length, I have seen this in the SIRIM labs many times. The source can be Ethernet, hdmi ( my link above shows plenty of low uhf ), switched mode power supplies and any computer.

3) I have seen MATV systems having to install a low pass filter to reduce LTE interference in Europe

4) If the cable is not marked, it is probably rubbish.

Today morning saw media prima analogue tv channel only show black background. RTM still show the ASO annoucement.

It depends on what signals are being carried by the cable. It won't radiate frequencies that are not present in the signal being carried. USB3.0 interferes with 2.4GHz Wi-Fi and HDMI interferes with certain DVB-T2 frequencies depending on the resolution being transmitted. Ethernet probabaly radiates at lower frequency.

Example of USB3.0 emissions which clearly interferes with 2.4GHz WiFi. The emissions are in a wider frequency instead of some peaks because USB3.0 uses spread-spectrum clock.


And here's an example of DVI emissions which is similar to HDMI and may interfere with certain DVB-T2 MUX depending on frequency of MUX and the resolution being transmitted with HDMI.


LTE shouldn't interfere if it's a different frequency with enough separation.

Yup, unmarked cables are usually poor quality.

This post has been edited by AV_2018: Oct 22 2019, 11:42 AM

1. Let say MYTV to restack its muxes to 474MHz, 490MHz, 506MHz, on top of the benefits mentioned earlier (like better coverage), what are the ways for viewers to prevent interference from other devices like Ethernet, HDMI, and so on, since you say lower frequencies tend to radiate more?

2. How you mean shortage of channels? Once ASO has completed, they can use between 470-690MHz, so how shortage of channels is it?

3. Hmm, why Singapore is allocated with entire 500MHz block, yet their channels only has 6. I got the info that they seem to transmit blank signals, like 594MHz and 602MHz. Means, there is pretty strong signal being transmitted but no channel inside. Any idea why?

4. Does that mean every DTT viewers in Malaysia must use a low pass filter (4G LTE filter) to prevent interference, even if the DTT muxes are on 474, 490 and 506MHz? If yes, then why MCMC or any telcos didn't mention that such issue will arise if 700MHz is use for 4G/5G, like they kept quiet about it?

5. Even if the cable is RG-6 and it's not marked, does it mean it's probably rubbish too? Would u advise the person to change to new cable if there's no markings on the cable jacket, even the cable still works fine and viewer able to receive adequate signal levels?

6. Besides HDMI, cable, antenna, geographical factors.... What are the other possible reasons that may cause viewers to not able to receive DTT signals that we haven't talk about?

This post has been edited by joshhd: Oct 22 2019, 12:21 PM

1. Depends on signal being carried by the cable. See graphs in my post above. Not always lower frequency radiate more.

4. LTE shouldn't be interfering if there is enough frequency/channel separation. 500 and 700 should be far enough. Also can use better quality LTE transmitters or filters at the transmitters to prevent it from transmitting too much out-of-band noise. From a DVB paper I read, other countries use low-pass filter to filter out 800MHz LTE signal from interfering with their 700+MHz DTT signals because their highest DTT channel only has 1MHz separation from their LTE band. It also depends on how good is the selectivity of the DVB-T2 tuner used.

6. Wet surfaces such as roofs and tree leaves as well as metal roofing may interfere too but this is classified as geographical? The decoder used is a factor too. Some decoders might be better at recovering the signal from lower SNR, interference and multi-path.

Update 6.27pm: more info added

This post has been edited by AV_2018: Oct 22 2019, 06:27 PM

The stronger signal from using the lower channels more than makes up for greater noise from digital electronics

Singapore used to use channel - space - channel- space - channel before ASO and they had a lot of channels before Malaysia got beyond TV3.
They filled the 500 MHz block because they got there first and Malaysia did not fight it at the time. This is crazy now after ASO

There is no 700 MHz LTE here yet, but tests have found issues with MATV in Europe, where 700 MHz LTE is coming very soon.

Sorry guys, just a noob question, the cable to connect the decoder with the central aerial of my condo use male2male of female2male? And also the botato decoder is good enough compared to the official myfreeview decoder? The price different is quite huge, +100 so I'm not sure if it worth to just get the botato version.

if you are aiming just to watch DTV, then yes.... as long as you have the knowledge to tune the decoder

it even has PVR functionality( via USB) - older non MCMC certified design/model though


not sure about the aerial cable though

This post has been edited by yongtjunkit: Oct 23 2019, 07:07 PM

should be male2male, but you can confirm by just looking at the connector at the wall & on the set, right?

Cause I want to purchase both cable and the box together online, so can't really inspect them physically. Thanks anyway!

other than official MYTV advance decoder, is there any tv box compatible with Hbbtv features?

well, you can see their photo of the connection. if you refer to lazada adv of the botato decoder, there are photo of the rear side, & it shows female type socket for the antenna connection, which means you need male type cable connector.

May I know what is the reason if the decoder show signal quality = 0 but signal strength = 90%? Cannot get the signal even I try use indoor antenna and outdoor antenna. It is possible area cannot receive the signal? I check in the myfreeview website it does has coverage in Butterworth.

The decoder is from Shopee :https://shopee.com.my/MCMC-Approved-TVBox-Astro-Full-HD-1080P-HDTV-Decoder-TV-Decoder-Terrestrial-Receiver-TV-Box-Astro-Antenna-Compatible-i.141014052.2667290356