General OpenPLi Questions (1 Viewer)

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Alan Rovner

SatelliteGuys Pro
Jan 8, 2013
166
77
Vancouver, WA
Hi all, I have a VU+ Zero 4K and so far have been very satisfied with it. A few questions......

Why do I have to run circular polarity on Ku band? I have the standard Geosat 90 LNBF.

Does blind scan work on Ku band? It produces odd results such as not seeing channels I have manually entered, and listing channels not present, possibly from somewhere else in my bouquet list.

Are there release notes for firmware updates?

Tnx
Al, K7AR

Sent from my moto x4 using the SatelliteGuys app!
 
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comfortably_numb

Dogs have owners, cats have staff
Pub Member / Supporter
Nov 30, 2011
11,968
12,940
Kansas City / Las Vegas
Hi all, I have a VU+ Zero 4K and so far have been very satisfied with it. A few questions......

Why do I have to run circular polarity on Ku band? I have the standard Geosat 90 LNBF.

Does blind scan work on Ku band? It produces odd results such as not seeing channels I have manually entered, and listing channels not present, possibly from somewhere else in my bouquet list.

Are there release notes for firmware updates?

Tnx
Al, K7AR

Sent from my moto x4 using the SatelliteGuys app!

You have to switch to "vertical and horizontal" on the blind scan menu

The blind scan plug-in is not foolproof and I would consider it "in beta" as I have experienced similar results.
 

raydio

K6KGW
Supporting Founder
Pub Member / Supporter
Jan 6, 2005
979
966
Rio Rancho, NM
Hi Alan the blind scan plugin has gone through an overhaul lately and some images do use it and some don't use it yet. For instance, I am using OpenPli RC7.0 and it has the new blind scan plugin and the lnb selection is "user" and then you enter in your LO frequency. The new plugin is better as far as accuracy is concerned, but as CN noted it is a work in progress...no blind scan is perfect or fool proof.

I only have Ku so that's all know as far as blind scan performance. I really don't have an issue with it as I know if there is a transponder that it won't scan I can always do it manually. There is always one on 103W that on blind scan it finds the transponder and then I tell it do scan and find the channels and it always misses them. I always have to manually scan that transponder.

As far as I know, there is not release notes on changes in images. However for OpenPli images, if you go to their forum, they usually have a thread regarding the changes they are making to a specific release.
 
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Titanium

AI6US
Lifetime Supporter
May 23, 2013
7,314
8,367
Meadow Vista, Northern California
Circular LNB selection had been previously used to provide single scan of both polarities by default. The KU LNB selection seemed to expect that the system used a universal dual LO LNB even if a single LO was selected. The OpenVIX team has been releasing the recent changes to scanning and LNB selection and slowing being incorporated into other images as raydio posted. Glad to see that this problem is being addressed. It was very confusing for first-time E2 users. LOF/L is the 22KHz OFF LO selection and LOF/H is 22KHz ON LO selection typically used for a dual LO Universal type LNB.

Threshold is the frequency switchpoint for the 22KHz control signal activation. For example: If the threshold is 11700, transponder frequencies below 11700 use LOF/L (with 22KHz tone signal OFF. TP frequencies at and above 11700 activate a 22KHz signal and LOF/H is active.

Depending how it is coded, leaving the Threshold setting blank with identical both high and low LO settings, this may cause transponders to be scanned twice, analyzed twice or even logged twice. This often doubles the scan time.

Try setting the Threshold at 11700 and report if this affects the blind scan either in a positive or negative way.
 
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comfortably_numb

Dogs have owners, cats have staff
Pub Member / Supporter
Nov 30, 2011
11,968
12,940
Kansas City / Las Vegas
Circular LNB selection had been previously used to provide single scan of both polarities by default. The KU LNB selection seemed to expect that the system used a universal dual LO LNB even if a single LO was selected. The OpenVIX team has been releasing the recent changes to scanning and LNB selection and slowing being incorporated into other images as raydio posted. Glad to see that this problem is being addressed. It was very confusing for first-time E2 users. LOF/L is the 22KHz OFF LO selection and LOF/H is 22KHz ON LO selection typically used for a dual LO Universal type LNB.

Threshold is the frequency switchpoint for the 22KHz control signal activation. For example: If the threshold is 11700, transponder frequencies below 11700 use LOF/L (with 22KHz tone signal OFF. TP frequencies at and above 11700 activate a 22KHz signal and LOF/H is active.

Depending how it is coded, leaving the Threshold setting blank with identical both high and low LO settings, this may cause transponders to be scanned twice, analyzed twice or even logged twice. This often doubles the scan time.

Try setting the Threshold at 11700 and report if this affects the blind scan either in a positive or negative way.

I can report that the latest OpenPLi RC blind scan menu changes the polarity to Vertical and Horizontal when standard LNB is used. You no longer have to manually change it.
 
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Chewie

SatelliteGuys Pro
Jan 12, 2009
350
195
California
Hello Brian
I have Ortho feeds for my C and Ku bands, and always had problems with the Ku having duplicates channels, tonight I follow your suggestions to set the threshold to 11700.
This is my setup now and I do not get any more duplicates so far on Ku.
Thanks this work for me.
Regards.
Tunder
 

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