Dear folks,
Some years ago I purchased a DMS BSC621-2 LNBF at quite considerable cost due to high shipping fees and importation taxes. I felt bitterly disappointed because it just wouldn't do the job. DMS claimed that I were the only one complaining but on the internet I saw plenty of complaints. The shoddy quality of the scalar rings that looked like they were made out of overpainted tuna cans also seemed to confirm that I had spent my dire money buying junk.
However since I entered this forum where I found all kinds of positive remarks I decided to try and identify the problem. I removed the teflon sheet in order to create the simplest possible basis position: just try to get the LNBF to work correctly with linear signals.
Having positioned the LNBF fully correctly I soon found out that I couldn't go from V to H with the normal receiver settings. Also doing blind scans I would only get vertical channels, nothing horizontal. The 22 kHz setting switches automatically between both Ku bands (universal LNB) and the positions Committed 1 and Committed 2 switched properly between C and Ku. Committed 3 and 4 just reduced signals but had no function, and using Disecq 1.0/1.1 which introduces the Uncommitted options had no effect whatsoever.
However, two things remained difficult to understand:
1. If I manually switched from V to H with my receiver (which btw works fine on all other dishes) I did loose much of the vertical signal but it didn't give me horizontal ones. But there is signal, just not enough to identify anything that comes in that way.
so the next step was to try and adjust for horizontal channels while turning the LNBF within it's scalar rings but that didn't seem to help any.
2. When I did much more manipulating with the committed/uncommited and 22 kHz options, somehow it unexpectedly happened that the system reversed itself: all of a sudden there were no more vertical stations available on any satellite or band but all horizontally polarized signals came in loud and clear.
But same story here, once I had the horizontal ones, vertical was impossible to switch to, no matter what I did.
I experienced this a number of times over a 7 day period, convincing me that at least the LNBF was properly positioned within the scalar rings. It was my messing around with settings in the sat receiver that somehow turned the system from a perfect horizontal channel receiver to a perfect vertical channel receiver. The fact that both polarities were in principle capable of a good and stable reception if only I messed enough back and forth with the receiver proved that the LNBF itself was well placed in the dish.
I jotted down each move I made, each setting I changed, tima and again, but to no avail whatsoever. It wasn't like I could repeat the switchover in minutes, sometimes more than a day would pass before all of a sudden I had the opposite polarization. And once I was there it was near impossible to get back. Just weird...
Somehow it seams that there is something in that DMS product that refuses to make the switch from H to V or vice versa, making the whole thing pretty useless.
Is there anyone who recognizes these experiences, or who could offer suggestions for a solution? I use different Clarke Tech receivers and an AZbox Premium HD+ and all receivers get the same results so I don't think the fault is at the receiver's end. The high quality coaxial cable is especially made for sat reception and measures about 25 meters (probably around 82 feet or so) but I doubt that that could be a factor.
Is this LNBF just ready for the trash heap or....?
Some years ago I purchased a DMS BSC621-2 LNBF at quite considerable cost due to high shipping fees and importation taxes. I felt bitterly disappointed because it just wouldn't do the job. DMS claimed that I were the only one complaining but on the internet I saw plenty of complaints. The shoddy quality of the scalar rings that looked like they were made out of overpainted tuna cans also seemed to confirm that I had spent my dire money buying junk.
However since I entered this forum where I found all kinds of positive remarks I decided to try and identify the problem. I removed the teflon sheet in order to create the simplest possible basis position: just try to get the LNBF to work correctly with linear signals.
Having positioned the LNBF fully correctly I soon found out that I couldn't go from V to H with the normal receiver settings. Also doing blind scans I would only get vertical channels, nothing horizontal. The 22 kHz setting switches automatically between both Ku bands (universal LNB) and the positions Committed 1 and Committed 2 switched properly between C and Ku. Committed 3 and 4 just reduced signals but had no function, and using Disecq 1.0/1.1 which introduces the Uncommitted options had no effect whatsoever.
However, two things remained difficult to understand:
1. If I manually switched from V to H with my receiver (which btw works fine on all other dishes) I did loose much of the vertical signal but it didn't give me horizontal ones. But there is signal, just not enough to identify anything that comes in that way.
so the next step was to try and adjust for horizontal channels while turning the LNBF within it's scalar rings but that didn't seem to help any.
2. When I did much more manipulating with the committed/uncommited and 22 kHz options, somehow it unexpectedly happened that the system reversed itself: all of a sudden there were no more vertical stations available on any satellite or band but all horizontally polarized signals came in loud and clear.
But same story here, once I had the horizontal ones, vertical was impossible to switch to, no matter what I did.
I experienced this a number of times over a 7 day period, convincing me that at least the LNBF was properly positioned within the scalar rings. It was my messing around with settings in the sat receiver that somehow turned the system from a perfect horizontal channel receiver to a perfect vertical channel receiver. The fact that both polarities were in principle capable of a good and stable reception if only I messed enough back and forth with the receiver proved that the LNBF itself was well placed in the dish.
I jotted down each move I made, each setting I changed, tima and again, but to no avail whatsoever. It wasn't like I could repeat the switchover in minutes, sometimes more than a day would pass before all of a sudden I had the opposite polarization. And once I was there it was near impossible to get back. Just weird...
Somehow it seams that there is something in that DMS product that refuses to make the switch from H to V or vice versa, making the whole thing pretty useless.
Is there anyone who recognizes these experiences, or who could offer suggestions for a solution? I use different Clarke Tech receivers and an AZbox Premium HD+ and all receivers get the same results so I don't think the fault is at the receiver's end. The high quality coaxial cable is especially made for sat reception and measures about 25 meters (probably around 82 feet or so) but I doubt that that could be a factor.
Is this LNBF just ready for the trash heap or....?
