Solution is either you have 2 satellite ports connected from your wall socket (not using any splitter), OR connect to your own satellite dish installed outside your unit (example: balcony) if your building management allows it and then use dual LNB and connects two (2) RG6 coax cable, OR subscribe to Astro IPTV. Try contacting your building management and ask for advice from them.

In technical explanation (that Astro will not explain to you):
In simple words, one (1) satellite port to the satellite dish (Universal LNB) can only work with either:

Low frequency Ku band (10.7GHz to 11.6GHz) (which is used for all SD channels on Measat 3, HD channels on Measat 3b, as well as selected HD channels on Measat 3 satellite)

- OR -

High frequency Ku band (11.7GHz-12.75GHz) (only HD channels on Measat 3a satellite).
This is because the HD channel that you recording are from Measat 3a satellite as Measat 3a satellite uses high band range of Ku band. This is a technical limitation due to incompatible satellite transponder frequency range.

Based on your installation, this is what will happen if you record 2 channels simultaneously:

Tuner 1: AXN (701) - SD channel on Measat 3
Tuner 2: HBO (411) - SD channel on Measat 3

Possible? Yes.
-----

Tuner 1: Astro SuperSport HD (831) - HD channel on Measat 3a
Tuner 2: Fox Movies Premium HD (433) - HD channel on Measat 3a

Possible? Yes.
-----

Tuner 1: Astro AEC (301) - SD channel on Measat 3
Tuner 2: Astro AEC HD (306) - HD channel on Measat 3b

Possible? Yes.
-----

Tuner 1: Lifetime HD (709) - HD channel on Measat 3a
Tuner 2: Discovery Channel (551) - SD channel on Measat 3

Possible? No.
It depends which channel start to record first. Assuming you are not watching any programme (leave your decoder standby). So for example Lifetime programme starts at 5.00pm-7.00pm, but documentary starts at 6.30pm-7.30pm. Then it will start to record Lifetime programme first, until 7.00pm. Then only it will start to record documentary from 7.00-7.30pm, so your first 30 mins of the programme (starts from 6.30-7.00pm) won't be recorded.

If 2 channels programme ends at the same time, then only the first programme that recorded first will be recorded, the second programme will not be recorded.
------

So as you can see above, only 1 port (for your case, the only one port from your wall socket) can receive one frequency range for Universal LNB (the normal kind of LNB, which is used on most homes and centralised building). Once the satellite port is receiving TV channels under low freq (SD channels), then you can no longer receive high freq (such as HD channels on Measat 3a), until you stop watching low freq channels then you tune to high freq channels, you can watch high freq channels, then you can't watch low freq channels.

You cannot receive both low and high freq at the same satellite port (connected to Universal LNB) at the same time. Unless if you use dual LNB, where the LNB has 2 satellite ports connected to Tuner 1 and Tuner 2, then it won't have issue. Or you use SatCR LNB, you can receive both low and high freq at the same time using 1 cable (or existing cable), but this is only possible for individual satellite dishes but not possible for centralised building due to technical limitation. You can get SatCR LNB from Astro and it costs RM53 (incl. GST).

Some HD channels are in low frequency, some are high frequency. You can only receive (also including recording) either low or high frequency from ONE port only, remember?

If Tuner 1 is already on 831 (high freq), then Tuner 2 can only receive 721 (high freq) HD channels

If Tuner 1 is already on 831 (high freq), then Tuner 2 can't receive 306 (low freq) HD channels
I suggest you do something about this, because this can make your TV experience miserable. Plus, don't make these technical s**t ruin your TV experience.

Get 2 separate satellite ports for your PVR, no splitter! Or, connect own satellite dish installed at balcony if your building management allows. Or upgrade to Astro IPTV. Or try ask if your building management, see if your building's centralised dish supports DCSS, which is similar to SatCR, it requires only 1 cable and it can powered to multiple satellite inputs/decoders (also known as Unicable). (Sorry if I am being too technical into this).

Don't understand what I am talking? Simple, call Astro customer service and see what they can help you.

Guys, anyone experience screen flickering issue only on HD channels recently? Normal channel without HD channels seems no issues.

Hi All, i would like to ask, i have just installed PVR
but when i record a HD channel
im not allowed to watch another HD channel at the same time.
It will appear the "connection problem" issue

the only way i can watch that HD channel if i stop recording tbe other HD channel

my astro is in a condo

thanks in advance

Yeah, the ads should be show any carton network / disney /Nickelodeon ads while you switch channels Animax. Each channels should be category...

Watch animax - ads either animax itself / disney ads / carton network ads... (Or introduce something kids food or kids event)

Watch fox movies - ads new movies launch in local cinema / hbo movies ads (Or introduce new luxury car / motobikes / any new products such as smartphones like professional one)

Watch chinese channels - ads should be all chinese... (But sometimes suddenly show India ads there.. ) Totally don't know this astro staff doing...

It's seems like astro don't know how to category the ads, macam copy n paste the ads video simply every channels... I think got brainless advertiser staff in astro... That why comes like this quality...

Oh, I get your point...   Some of the secondary/primary school got install astro.. (That why called astro in school~)

That's totally useless one..
I think they will purposely install astro, due to sometimes new customers/parents sit in the meeting room to watch channels temporary (to avoid boring during waiting time) while waiting for teachers/tutors come to meeting room for further discuss regarding your kid's thing.