rlwpub
join:2002-08-27
York, SC
| [DW4000] Signal strength drops from 60 to 10 every few hours
Got a strange one. My signal strength just drops for non weather reasons from 60 to 10 at random time intervals. I can be online from 20 minutes to 2 hours and then suddenly my signal drops from 60 to 10.
Usually I have to unplug the modems and then plug them back in to get the signal back. They have to be unplugged anywhere from a few minutes to 20 minutes.
At first I thought it may be the modems but this started happening exactly when Hughes changed the transponder I am on.
I was originally on 99w/1250H and was moved to 99w/1110V
First I had a signal strength of 10 for 2 days. Then it jumped to 61. Now it goes back and forth from 60 to 10.
Any ideas?
Re's
Rob |
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grohgreg
Dunno. Ask The Chief
join:2001-07-05
Dawson Springs, KY
| Three possibilities come immediately to mind; transmitter isolation, IDU power supply, Hughes.
It's very common for the TX ISO to be good on a transponder of one polarity, but bad when moved to a transponder of the opposing polarity. The remedy requires an antenna repoint to optimize ACP on the new transponder.
When the RSL starts going nuts, check to see if the IDU power adapter feels hot. Typically it's just warm to the touch. When they start to go bad, they heat up.
Hughes is trying to force legacy users to upgrade to the HN7000S. I can't rule out corporate malice, in that your newly assigned gateway could be providing substandard performance - on purpose.
There are other possibilities, but check the first two out first. Not much you can do about the third for the moment.
//greg//
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HN7000S/1.2Ghz Tualatin/1.2GB PC133 - W2K Pro/SP4 - G11/1410H - RSL screwed up since March 16th - NAT67.44.28.61 - DNS66.82.4.8 plus rollovers - Firefox 2.0.0.6 - SSL proxy switch - AVG+firewall v7.5 |
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rlwpub
join:2002-08-27
York, SC
| reply to rlwpub
The signal just dropped to 10 again. The power supply is warm but not hot.
To get the signal back up you do have to power down the modems for several minutes. If you power down for just a few seconds it drops signal down to 10 within a minute.
It's just strange that my equipment just started acting up the minute the transponder changed.
I can also reload my old bin files and the signal is fine. Just can't access the Internet.
I reload the new bin files and the signal drops after 15 minutes to 1 hour of Internet access.
Supports answer is ... We need to send out an Installer, but since we no longer support the 4000 modems we will not.
Re's
Rob |
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rlwpub
join:2002-08-27
York, SC | reply to rlwpub
Hmmmmm... I read some place that the modems send 12 volts to the feed horn when horizontal and 18 volts when vertical.
Did I read that correct? And could that be causing a component to over heat? The 6 extra volts?
Re's
Rob |
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rlwpub
join:2002-08-27
York, SC
| reply to rlwpub
Well it seems to be a heat problem. I put a fan on the modems and a gel pack on the power supply. Ran great!
Took the gel pack off the power supply and it's still running great.
Seems that the receive modem can run Horizontal frequencies fine but over heats when set to Vertical frequencies.
Re's
Rob |
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grohgreg
Dunno. Ask The Chief
join:2001-07-05
Dawson Springs, KY
4 edits | reply to rlwpub
said by rlwpub  :Did I read that correct? And could that be causing a component to over heat? The 6 extra volts? No, you didn't. To receive from a vertically polarized transponder, the IDU sends ~13v to the ODU. To receive from a horizontally polarized transponder, the IDU sends ~18v to the ODU. Unlike satellite TV which switches polarity almost as often as you change channels, sat internet is usually one or the other: vertical all the time, or horizontal all the time.
The installation instructions and user manual are VERY clear about providing max air flow to the IDU and power adapter. Sticking either/both away in a drawer or closet just won't work. Most DW4000 users discovered long ago that the best position for the IRU/ITU stack was to rotate them 90 degrees (set them on edge, rather than one on top of the other). Some even removed the clips and set them end to end (also on edge). The power adapter should also be exposed to circulating air, the best position would be for it to be sitting on edge also - one of the narrow sides. This will maximize exposure of the surface area of the case, permitting it to act as a heat sink
//greg//
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HN7000S/1.2Ghz Tualatin/1.2GB PC133 - W2K Pro/SP4 - G11/1410H - RSL screwed up since March 16th - NAT67.44.28.61 - DNS66.82.4.8 plus rollovers - Firefox 2.0.0.6 - SSL proxy switch - AVG+firewall v7.5 |
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