I wrote this earlier, just didn't post it because I wasn't sure if it sounded stupid, but seeing your last post, think we kind of came to some of the same conclusions.
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The more I've analyzed that IQ sample, the more and more brain dead I become.
What I've done though, I've used the first two bits (lb and pf) as a switch just to indicate which bank of channels we are looking at, and that seems pretty consistent. I don't think its like a LCSS, because it always alternates 1 or 0 (not enough channels I guess for a 2 or 3). If it is LCSS, then it could be a constant first block last block repititon, but that system is so busy its hard to find spots where you get back to back CSBKs for that site status update, so I'm thinking the sequence is more like a bank switch, unlike Cap+. Could still be wrong though.
As far as the TG values in the Site Status CSBK, when its private data or private calls, it would seem to be an 8-bit hashed value to represent the longer private target value. I need to write a CRC8 that will do the correct hash of the target values for the SLCO Activity Update, I wonder if this is using the same hash values. When its a talkgroup in a group call though, like in the earlier samples, it does indeed show the 8-bit TG value from the link control.
As far as the status bits that preceed the 6 bytes that give us the 8bit TG or hash values, I am getting a lot of '10' bits in those. I am assuming those are for private calls, but I can't seem to find a distinction between when it is supposed to be private data call or private voice call. However, I am also not always getting a corresponding TG value in the designated byte for a '10' status, so I think that depending on whether or not its a data call or a voice call, it may either be 00, or an actual value there. There are Preamble CSBKs however, so that may serve for the data calls as opposed to the status update tg value. Also, because the private values are hashed, and I don't have a way to hash the TG value, I can't tell which is private voice and which is private data, or if I am way out in left field on this right now.
I have still yet to see the status value of '01' however, so I am wondering if that is group data call. '00' always seems to indicate idle, and '11' seems to indicate group voice, or if the TG value is null in the corresponding byte, then I think that means the repeater channel is not turned on.
The other main issue that the IQ sample is, is that I think that perhaps some of those frequencies belong to another XPT site, so it makes it difficult to find matching 'sites'.
