When Video 1 (11729) is active, I never have any problem with it showing up on a blind scan, while RTN rarely shows up on a blind scan (whether Video 1 is active or not). Others have also noted that RTN sometimes doesn't show up on a blind scan. As well, it doesn't always pop right in when I first access the channel (similar to KUIL). I use to have RTN at 11735, but changed it to 11740 and have never had the problem of Video 1 taking over repeat itself (which did happen when it was at 11735). I think ACRadio is correct that AFC action of the receiver will determine the "winner", and as listed above, when I had RTN at 11735 and with RTN not popping in right away, the receiver hunted down to the much more "friendly" Video 1. With it at 11740, when the receiver hunts down it now finds RTN (even after a few seconds) and never tunes down low enough to get Video 1. (NOTE: I also tried 11736-11739, but 11740 always outperformed the others as to how fast it found the correct signal.)
On my Pansat right now, both show a similar strength of around 45 (which is the maximum I ever get on RTN).
I agree with the contention that some of these various receivers seem to have an AFC which will hone in on a specific signal. From what I've seen, the receivers with blind scan tend to look further out from the selected frequency. I used to have issues when looking at sats that had numeroud 3978 news feed transponders close together. Often, it would depend which direction I was coming from that would determine which transponder I would lock with my blind scan receiver. Also, if say (for example) I was watching a transponder at 11721, and there might be another transponder active at say 11728 or even 11735 (these are from memory from what used to be on IA6 CBS feeds). Well what I'd see was that if the 11721 feed went down, that the blind scan receivers would lose signal for a few seconds, then they would lock in on the nearest other signal in the area with a similar SR, and would search at least 15 MHz, perhaps more. Non-blind scan receivers wouldn't tend to do this, or at least wouldn't search so far, and my Twinhan, wouldn't go even 4 or 5 MHz off freq. My TT3200, will go at least 20MHz off freq. So different receivers are significantly different in this regard.
One other thing, yesterday, I posted that the 11735 was significantly stronger than the 11729 signal. When I did that scan, I was looking at the signal coming through the passthru of my diamond, and that Diamond amplifies the signal a bit, and I was noticing some issues with the higher end of the band, suggesting that the amplifier wasn't linear. Today, I did a re-scan, but this time used a splitter from the coax line, so the only thing between my scan receiver and the LNB is my SG2100 and my DiseqC switch (I may try eliminating those tomorrow). Anyway, I'm still getting a bit of non-linearity at the high end of the band, however today, the 11729 is equal strength, compared to the 11735 signal . I really don't think the amplifier is responsible for this, since the two signals are so close together, but it's possible. Anyway, today's scan:
"A" is 11735, "B" is 11729 .
The other two transponders with lines pointing to them are 11775 (NBC), and 11969 , which is some data channel that I can't seem to get a good lock on with my Twinhan, despite the fact that it is a very clean signal. These other two signals are the only other channels that my Ultra came up with on a blind scan (in narrow SR mode), despite the fact that there are lots of signals there. I think my Ultra is getting old. :-(
But anyway, today, I agree, the 11729 and 11735 signals are equal strength. However I really question whether the 11729 signal is ever NOT ACTIVE, but rather might just change in strength. That signal has an EIT, which seems to indicate that it's on 24/7 {program length each day is 24H}, although that doesn't mean much I guess.
: Take us to your leader!
