DVB-T Program Reception: Comparing Signal Quality of k54, k37, and k48 Transmitters in Ostrava

Question

Due to my place of residence, I receive Czech DVB-T programs from transmitters in Ostrava. Three multiplexes are available: k54 (738MHz), k37 (602MHz) and k48 (690MHz). I receive the first two with 100% quality, while the quality of the k48 signal ranges from 10-20%. According to the data on www...

LeDy · Answer

To begin with, replace the power supply with one with regulation. What amplifier in the antenna?

makar42 · Answer

There is only a balancer in the antenna. I am not sure what the regulated power supply (voltage?) Would give. The AWS-1031 antenna amplifier is powered by 12V voltage and has 3 inputs for the 21-60 range, with adjustable output signal level.

maksar · Answer

Where is this information in the first post that you have to pull your tongue?

nomudrek · Answer

On channel 48 (690 Mhz) programs are received but from the second transmitter in Ostrava (Hladnov), which transmits with a power of 10 kW hence the low signal level. Good reception would be, however, from the Ostrava transmitter (Hošťálkovice), whose power is 100 kW. Both transmitters broadcast on the same channel and almost from the same direction, hence the difficulty to pick up from the stronger one.

makar42 · Answer

maxar - do you have to pull the language? - what form is that! nomudrek - the Level690MHz graph gave suspicion of interference from a transmitter of the same frequency. I searched first on the Polish side, but there is no k48 transmitter within 100 km from me. I read about this second Czech transmitter (10 kW) on this page www.digitalnitelevize.cz, but I did not consider this aspect, because why the 10 kW transmitter, located in the center of the city on a tower water reservoir, would disturb 100 kW on the 185 m high tower

maksar · Answer

Read point 3.1.15 of the regulations. Maybe some other equipment. Or maybe by hand, as it is possible to search. It's all given, not just help!

LeDy · Answer

And where did you write what amplifier you have? And what do you dislike about pulling the tongue? Do you have any associations? It's a simple statement that you should give everything in the first post.

makar42 · Answer

nomudrek - Your claim about interference from Ostrava k48 transmitters is probably not entirely true. It turns out that the Hladnov water towers also have k54 and k37 transmitters, also with a power of 10kW each, but they do not interfere with 100kW transmitters from Hošťálkovice. (same channels)

MICHAŁ · Answer

The reason for this is that you receive mux 1 and mux 2 (Czech) with better quality than mux 3 (Czech) because you probably pick them from Lysa Hora. Transmitters 25 KW but located high over 1300 m hence large range. Mux 3 (Czech) is not broadcast from this location, hence the worse signal.
https://www.digitalnitelevize.cz/vysilace/region-moravskoslezsky-kraj.html

makar42 · Answer

An interesting theory. Transmitters from Łysa Góra did not take into account, because: distance 60 km and power 25kW, when at 30 km I have 100 kW transmitters. By the way, I don't quite understand how it is with digital signal interference - is it or not?

makar42 · Answer

I went to dvbtmap.eu and took off the terrain profile for the signal from Łysa Góra and Ostrava and everything is clear. On the route from Ostrava, the KWK Rydułtowy heap is an obstacle. To find out the validity of this thesis, I went to a friend who lived about 2 km west of me - MUX3 receives 100% quality. I am looking forward to the demolition of this heap.
I'm closing the topic.

DVB-T Program Reception: Comparing Signal Quality of k54, k37, and k48 Transmitters in Ostrava

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