Hi all. Firstly thanks for this interesting service (Othernet) and this forum and the people who are always helpful.
I bought two v3.05 Dreamcatchers at the beginning of the year and have tried 4 times to set one up. I think my initial problem was location. I have some trees around and am in a slight valley. However, after changing locations to the front of my house, sighting along the LNB, I now don’t see any trees in the way.
I have kept the dreamcatcher and LNB inside the house when not experimenting, so I don’t think heat/rain/ice has ever affected it. I tried again today, since the weather was nice (under 75F, about 23C?, no rain, not much cloud cover).
I have a heavy wooden stake I drove into the ground a few feet (less than a meter) where it will not wiggle or wobble, even under strong winds (or with me pushing it). I bought an LNB mount and screwed it to a second wooden block. The screw on the LNB mount can be loosened to achieve right-left rotation (azimuth) and I attached the block to the stake with a hinge pin so I could adjust it up and down for elevation.
I set the LNB up yesterday and attempted to receive Othernet. I used dishpointer.com and since I am in the Northeast USA I selected SES2 87W.
Dishpointer gives a true and magnetic Azimith, which are off by about 15 degrees. I have the iPhone compass “Use True North” switched OFF, so I used the magnetic azimuth at first and pointed the LNB with my iphone compass. I noticed the iphone compass (like any compass) would give erroneous readings near metal objects so I tried to move away from anything that could cause this effect (including taking my Leatherman tool off my belt, which seems to have affected it, I guess I was holding the phone at waist height). While testing, I actually swept from the True to the Magnetic direction, so even if I picked incorrectly, it should have worked anyway
I set the elevation (up from horizontal) using a level/protractor app on the iPhone
Dishpointer also gives a clockwise Skew number, and I believe Kenbarbi’s excellent document says you set that by standing behind the LNB and rotating it clockwise (like tightening a bolt). The LNB mount I bought has markings on it that helped me get this precisely set, but ultimately it requires a level ground mount. I think I have this set correctly.
Connecting to the Dreamcatcher over Wifi on my laptop, it was reading something like -17dB S:NR and -90 RSSI. Lock was = NO. However, it was receiving packets (# packets was incrementing at about a 1hz rate). They were all invalid though.
Moving the LNB around slowly, I was able to improve this to where the SNR bounced around from -14 to -15 dB and the RSSI was -87. At that point a handful of packets came through (as valid). But after swinging a bit left and right, and up and down from this spot, this was the best I could get.
- It seems to me that LOCK=YES is just another indicator that a valid packet came through. Is that true? Every time the valid packet counter incremented, Lock changed to =Yes and then it would go back to =No, as invalid packets were received.
I would never get more than a handful (maybe 5) valid packets in a row. But the packet counter would go up every time I did, and the Error rate and Valid Packets % would go up.
I figured I’d try again today (same weather conditions). Thanks to Kenbarbi’s 3.05 guide (without which I’d be completely in the dark!) I tried the ‘tuning’ operation. I started from 12.0894 (per the instructions) and took 5khz steps up to 12.089475 (in Ken’s document, he said he had to go up to 12.098495).
The best response seemed to be around 12.089425, but even there, it would rarely go into Lock and I would only get maybe 10 valid packets at a time, the error rate was quite high.
Around 12.089470, the Status screen started reporting odd values. The SNR went to -40 and the RSSI went to -160 (I assume these are ‘pegging the needle’ and represent the worst possible reading value that the register can report) and only occasionally bounced back into ‘reasonable’ values. The Valid packets counter was no longer cumulative. It would bounce up to 3, then back to 1, then to 5, then back to 0…
Even after going back to 12.089425, it would still show -40 SNR and -160 RSSI most of the time, and the Valid Packet counter was nonlinear (which is NOT how it was acting prior)
- Is it possible to damage the LNB by setting incorrect values to the DAC? I don’t think I even set ‘extreme’ values (as I never even made it to 12.089495) am just wondering why the behavior changed.
I also tried using the Autotune app, which seems like a great idea! However it didn’t do anything for me (ended with the “Scan done, nothing found” message). It only seems to have 10khz steps (Kenbarbi’s guide suggested 5khz, which is what I used when I did this manually). I selected 50 steps and it did 100 operations (I assume it goes 50 above and 50 below your current setpoint). I started it at 12.0894. I think the Tuner Status coming back as mostly bad (-160 RSSI, -40SNR) was making it impossible to tune anything. I also tried going a bit under 12.08495 but nothing much happened there, either.
In general, what else can I try to get lock? As I said;
-I had better results a few months ago which would normally suggest foliage interference but it looks to me like I really do have a relatively clear view of the sky over the treeline (as far as I can tell by eyeballing it)
-I have >2A 5V power supply
-Throughout today’s experimentation, the status said “Bias-T Voltage Normal” and “LNB Detected, Normal Current Flow: 0x23”
-I don’t have a long run of coax, in fact, the Dreamcatcher is connected directly to the LNB via the short flylead on it
-The setup was not outside for more than 3 or 4 hours total and never exposed to high/low temperatures, or moisture.
-I considered using a dish or cone structure to improve my result but I think I need to start with a better initial connection than I’m getting (at least get lock with the bare LNB) because you can’t improve what’s not really there.
If the “packets received” counter is going up, is this a 100% absolute guarantee that the LNB is hearing the satellite (the RIGHT satellite and transponder)? Or could I possibly be pointed at the wrong one and noise (or some other data like 4DTV video) is ‘fooling’ the code that looks at the datastream?
How frequent does the Tuner Status page update? Is it 1hz? Sometimes it appeared to freeze for several seconds (nothing wrong with the wifi connection though, it’s at 85%+ on my laptop)
So far, I haven’t had great luck (lack of skill on my part?) with this device. The non-fortuitous reduction in power is probably not helping things but I did what I could about that (bought two units )
Thank you for any advice you may have.