It is for super super old TVs and devices that does not have AV (composite) inputs.
You connect that RF OUT port to an analogue TV's ANT IN port, and then you perform auto scan, you will see there's one analogue TV channel is showing the video output of the digital TV box.

Basically, it works like you're watching it on RCA (AV composite) output from the digital TV box, but it's this, is watching it via 1 analogue TV channel.
You switch channels on the digital TV box, the picture on that analogue TV channel changes too. It's just a video output.

Old TVs that doesn't have AV composite input are very rare la seriously. For those who still using that, ugh, just get a new TV... 

Hahaha... It's not wrong to say that simply pressing ch- and ch+ buttons on remote is indeed very easy to use. So simple, and not complicated.

What cable are you referring to?

According to Wikipedia: Male (left) and female Belling-Lee cable
Belling Lee connector cable is also known as TV aerial cable or PAL cable.

Anyhow, it's not necessarily must buy this specific type of cable.
You can use RG-6 coaxial cable (Astro white cable), and terminate the ends of the cable with whatever connectors you want, including Belling Lee connector, either male or female port.

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If your aunt gets confused by using either TV remote or the Digital TV remote control, then just tell your aunt to use only the digital tv remote, and stop using TV remote completely, including adjust audio volume.

You adjust TV volume higher a bit, then tell your aunt to use digital TV box's remote to adjust the volume, not the TV. Then, you keep the TV remote somewhere else in the drawer or something. Take it out only when you need to change some other settings on TV, or use other smart TV functions.

Yes, you may connect your IDTV via RF Out function to get DTT signal, as long the cable is high quality (HDMI/TV Boxes will affect DTT reception). Some of the DTT boxes (in overseas) indeed have RF Out function to convert digital TV into analogue TV signal for video input (like what we saw in some old school Astro decoders). The RF OUT port, at least on the MYTV DVB-T2 box, only provide signal passthrough for existing analogue (no longer exists)/DTT signals. This mean that you can hook up many TV Boxes, provide if these TV boxes have RF OUT and the signal is strong enough and both set top boxes are also connected (DTT signal levels will reduce when you hook up from one box to another). These boxes must be in standby/On mode, otherwise the passthrough won't work.

Oh yeah... It's pass-through/loop...
Yeah you're right about the RF Out. Now I remember...

Meanwhile, some news update from the upcoming satellite pay TV provider, Sirius TV:


Source: https://www.facebook.com/Siriusmalaysia.tv/...133868351356193

Brief translation:
Okay, so MYTV is not happy that the sales of their STB brand is not performing well as they would wanted it to be.

In other words, all viewers to have the "inconvenience" to switch between input sources (e.g. from DTT to HDMI 1, and vice versa) is still way cheaper than allowing/providing all DTT channels onto your platform.
So lesson learnt, don't rely on Sirius TV or any other pay TV providers to provide you the convenience to be able to watch all DTT channels on a single platform, in expense of them needing to pay a lot of money to MYTV or broadcaster.
So just get a DVB-T2 box or TV with DVB-T2 function to receive digital TV channels via UHF antenna...

All the myFreeview watermarks on the non-test channels are gone now.

These are the DTT frequencies after frequency restacking is being carried out for Mux 1 and Mux 2.

Source (as of 6 Dec 2019): https://www.mytvbroadcasting.my/pdf/Lists-of-frequency.pdf
Original PDF for archive purposes: [attachmentid=10370434]

In conclusion, the total frequency range they'll use after frequency restack is between 546MHz to 682MHz.
682MHz (678-686MHz), just right enough to prevent interference from upcoming 700MHz 4G/5G band.

Although I do hope that they would use 470-610MHz frequency range for DTT instead...

So far MYTV only announce there'll be 5 transmitters to complete the frequency retune exercise by end of this year.
The rest are still haven't announce...
That could mean the one that they just uploaded to their website, is still subject to change then? 
Will see how... 

Just manual search Mux 1 and Mux 2 frequencies. Like 666MHz and 698MHz, depending on your area.

Take pic and show us how's your antenna look like now.

This antenna looks fine...
The cable, is it the RG-6 type? Look at your cable there, and see if there's a label like this:

Here's the comparison between 3C-2V cable (top, commonly used in those days) and RG6 cable (bottom, recommended cable to use for better reception performance).

If it's not RG6 type (e.g. 3C-2V or 5C-2V), then that's likely the culprit of you experiencing that intermittent signal reception.

Also, check if you terminate the cable properly on both ends.

And, loosen the screws just a bit, just to make it loose enough to adjust/turn the antenna around, until you get the highest and stable signal strength readings. Yea, monitor the signal readings while adjusting the antenna is highly recommended.

Oh, use cable splitter will affect the signal, unless if you have in-line amplifier connected, then it should be ok.
What DVB-T2 box or IDTV are you using now? And what's the signal strength you're getting now for both Mux 1 and Mux 2, assuming now is clear weather in your area?

Hmm... Try readjust the antenna first if you can.

"Hobby grade slicing" 😂 If like that sure have signal loss due to improper termination...
If possible, try connect it directly to the antenna without any splitter used, and terminate it properly, such as using F connector.

Crude splicing gives much more loss than a proper splitter (which can be only 3dB loss)

The unused section still wastes signal even when the TV is off or disconnected

The cable is cut off? Hmmm..

Anyhow, if it's too complicated to find a solution, consider "start fresh".
Meaning, buy new antenna and cable, do the wiring yourself and connect to your TV. The one that your landlord install one, don't bother. Leave it as it is, unless your landlord want to do something about it.

You get your own antenna and cable. This time don't install at rooftop first like what your landlord do. You hold the outdoor antenna with your hands as high as you can (since you don't have ladder) then move here and there, while monitor the signal strength readings on TV. From there, you can study which spots in and around your home are able to get good digital TV reception.

Rather than complicating stuff, it's easier and more straightforward to start fresh in this way.

To buy antenna, I believe those 5 elements UHF antenna that you saw on online shopping sites (Shopee, Lazada...) are good enough. Or u can get 8 elements or 14 elements UHF ones if you wanna play safe.

Maybe you can consider this:
https://shopee.com.my/product/6938079/313253815?smtt=0.0.9

https://shopee.com.my/product/45285202/2283873507?smtt=0.0.9

These antenna can be used either indoor or outdoors. Not necessarily must drill hole to install permanently on the wall. Cuz if the signal is strong enough, you can just place the antenna on top of the shelf, or cupboard or something, and still able to get signal already. So don't nerd to think about drilling first, unless if you tried that indoor reception is not possible at all, then outdoor is your better option. Wiring part, you can just find ways to lay the cable from the window or door.... Still, not necessarily must drill, unless you decided to make it permanent. For your case, doesn't seems like it la 😂

As long any "good enough quality" standard RG6 coaxial cable, is good enough already. Usually it's white colour cable.
Even the ones that Astro provide to customer during installation, they also use the normal/standard quality ones, and not those more expensive black colour cable.

How to know whether the cable is "good enough"? That one you need to ask other sifus here.
But I don't think need to worry too much about it, I guess?