The box supplier is telling me that it is our internet and we should do a speed test on their box which I have done, even when it is freezing and we seem to be getting a steady 24/25mgps. They say our ping is too high, it is between 18 and 21 and we should lower this. I didnt think it was possible to do that? Im obviously not an expert but any advice you may have would be very much appreciated. We are with Airsat for internet and get about 28 mgps steady signal.
Speed tests, other than an initial check are all but useless. The issue is they measure a quick burst, perhaps 30 seconds of internet. What they do not advise you is of ongoing or continual stability, or if the internet provider is throttling the speed to the portal.
Usual values for optics of cable connection is 5-20ms. Wireless (2.4Ghz, 5Ghz,..) 30ms. or so, Mobile connection is much worse >100ms, satellite internet can also be slow on the ping front.
Your ping is low & looks ok - if over 100-150 ms would question, yours is fast. This means either you have instability or throttling from your ISP - or the box service is not up to par & information you are being presented with is not 100% accurate. You could always run a comparative test of another IPTV service on your existing set-top box, which would then help you determine if issue is the ISP or the IPTV provider (we can offer free test trial). Or you could take your IPTV box and put it on a friends internet connection and see how it performs.
Minimum size you would need for a new dish is a 1.4 and at this size, best to avoid cutting corners or with cheaper dishes or LNB's as is the breakout point of stable reception, cost best of the 1.4's installed is €299 however, not really needed unless you really want to see the back of the better performing but much bigger 1.8/1.9. Main difference is that the smaller dish can be wall mounted - whereas generally the 1.9's are floor mounted which can take up precious terrace space.
Edit - further thought: If the issue is the space the existing dish is taking up on the terrace or ground (?)then it may be possible to put it on a wall mount or custom bracket - saving the existing dish & freeing up floor space.