posted
Originally posted by JimmyD: So, here is where I am confused. I thought that the dish searched until if found any signal, then looked at the sat table to see ID the sat. However, before the table was modified, the D3 did not even see 89W, it cruised right past it. So how did modifying the table cause it to stop and ID 89w. Does the question make sense?
The D3 has to have some idea of what to look for before it starts. It has a radio, and that radio has to be tuned to something. It is sort of like putting your AM radio in your car on 1110 and cruising I-80 from west coast to east. If you pass through a town with a station on 1110 you will hear that station. If you pass through a town without 1110, your radio will not know you passed through that town.
The satellite table has two frequencies possible for each line. If you look at the headers you will see that the second number is "Search Freq" and that number is zero on most lines. Zero means "Use the RF Freq as the Search Freq."
So, with the old table, the D3 was using this line for H settings: G28 89W H,-89,11746,0,1,5789,19
The problem was that 11746 was no longer in use on 89, so it would rarely stop there.
I made the H line: G28 89W H,-89,11887,11820,1,6671,1 That causes it to use 11820 (which happens to be 1070 in our normal usage) to search, and 11887 to ID if that is not the assigned satellite. As long as you are on Hughes 1070 you can be sure that particular radio station is a working one when the antenna cruises by.
One additional note: The D4 and later controllers use a frequency that is in their config. That is often set to zero, which means "use the table" but they can also be set to something else and override the table. The D3 does not work that way. The transponder frequency setting in the D3 is used to override the Hughes modem setting, but it is not used for search.
That causes it to use 11820 (which happens to be 1070 in our normal usage)
How do we get from '11820' to '1070' ?
-------------------- Don Marr WWW.OREGONRV.NET 541-683-5361 See where I am Country Coach Concept 40' F1 - D3|7000s|99W|LinkSys wireless with 1000mw WiFi amp & Ext. antenna Posts: 3411 | From: Eugene, OR | Registered: Jun 2004
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-------------------- HughesNet l Xplornet [Canadian] VAR l F1 D2 91/985 l Windows 7 Posts: 189 | From: Mission, BC Canada | Registered: Oct 2003
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11820MHz is Ku-Band, which won't travel down a wire. The LNB is a "Low Noise Block Downconverter" that shifts the signal into the L-Band. The shift is set by the Local Oscillator in the LNB, which is 10750 for Hughes and most other North American satellite providers, but not all. That's why the value can be changed in the controller configuration if there is a different LO.
The LO in the Block Up Converter (what we call the BUC, transmitter, or radio) is 13050, so the signal from 1070 L-Band is sent to transponder frequency 14120MHz
posted
Hi, Don B could you send the new sat table? I have been using the BOW to get online. It keeps saying it does not recognize the signal on a lot of satellites.
Bil
-------------------- Traded the Real estate for Wheel estate, home is where we park it. 06 Expedition towing 10 Ford Escape F1|D3|HN7000S|89W|1410/30|VH|Linksys|WPA2 Posts: 148 | From: Roaming USA | Registered: Nov 2007
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We are very sorry that many of you are having a hard time locking on to satellites. Don, thank you for assisting customers by updating sattables. Moving forward MotoSAT is going to try and be more proactive in sattable creation. If anyone has any satellite that they think is outdated please do not hesitate to contact the technical support team at 1-800-247-7486. As of today we are going to be locking to the following satellites to test. 83w 89w 91w 99w 117w 123w 127w These are from what we can tell the most used satellites with our systems. hopefully we will have a fully updated sattable shortly. Don, again thank you for your work I believe we will probably use your entries for 89w.
Posts: 86 | From: SLC | Registered: Sep 2007
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If the current Sat Table is finding the users satellite in under 15 minutes then any errors in the sat table is likely not affecting your search. The biggest problem with a table is if the controller misidentifies the users satellite. This is what was happening with 93W, it would point at 91W and think it was 93.
-------------------- Don Marr WWW.OREGONRV.NET 541-683-5361 See where I am Country Coach Concept 40' F1 - D3|7000s|99W|LinkSys wireless with 1000mw WiFi amp & Ext. antenna Posts: 3411 | From: Eugene, OR | Registered: Jun 2004
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Don, Thanks so much for staying on this issue and for explaining things. I am also really glad to see that MotoSat is taking an interest. The change that I made for the 89w made all the difference in the world.
-------------------- Jim Posts: 97 | From: Full Time RVer | Registered: Dec 2007
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DonB, we have already fixed the 93w V issue and are continuing with the other satellites. Trekker, 113 is not a major satellite but we can always check that satellite as well.
Posts: 86 | From: SLC | Registered: Sep 2007
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Thanks, Mitch. I am on 83W, so 113W has little potential impact for me, but it does have about 2% of the DSU members who post their location on Don's map, and is certainly a better choice than 117 for the HN7000s modem users. Gary
-------------------- DSL & Verizon Jetpack - formerly F1 Datastorm w/2-Watt BUC | D3 3.9.6w | HN7000s 5.8.0.82 | AMC9 - 83W/1290 H/H | 33Msps | BOW SL3 SWM HDTV | Linksys WRT54GS See my current location Posts: 1194 | From: Debary, Florida | Registered: May 2003
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Is there any update on this? I am on 117 and the D3 does not identify it. Today it found it as the first satellite signal, but after trying to identify the satellite it gave up with the unidentified satellite message and began to move on, even though the SQ was showing 66 at the time.
Posts: 147 | Registered: Sep 2003
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That is really odd. The D3 is usually pretty good about switching to using the modem if it holds signal more than a few seconds. When it does, satellite id is moot.
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