Need your experience and opinions

[Hunno]

Hello!

I would like to know what you think about these packets (please see attachment), what you can see in them, what you can comment on?

I also have an IQ record.

 

[dave3825]

What are you looking for? The meanings?

CSBK preamble may be used to improve successful delivery of DMR services to MSs that are scanning or improving battery life by implementing a sleep mode.

 

[thewraith2008]

This is a MS response to a request of some sort. (on a BS uplink)
The request type would have been broadcast on the BS.

Since DSD+ doesn't know what it is, either because of the "ERR1" in one of the blocks or it doesn't know.
Could be GPS or some data from sensor etc...
The ASCII dump does not show any plain text message. (but it could be using compression)

 

[Hunno]

This is a MS response to a request of some sort. (on a BS uplink)
The request type would have been broadcast on the BS.

Since DSD+ doesn't know what it is, either because of the "ERR1" in one of the blocks or it doesn't know.
Could be GPS or some data from sensor etc...
The ASCII dump does not show any plain text message. (but it could be using compression)

Hello @thewraith2008 , @dave3825

Thank you very much for your comments, this is what I am looking for - different observations on this data.

From what do you understand that this is a response, on the base station uplink?
What I know/guess is that it should be a some sort of system start-up via RF, data sent by the central management radio.
Regarding compresion, what compression principle is used, do you think it's because ASCII doesn't show anything in particular?


I just need the observations of this community about these data packets, as many comments as possible About everything you see in the data
I can also send you the IQ file.

 

[thewraith2008]

From what do you understand that this is a response, on the base station uplink?

Well that's what it looks like to me.
DSD+ is reporting that the signal is DMR MS SYNC. (and is most likely destined for a BS uplink)

Regarding compresion, what compression principle is used, do you think it's because ASCII doesn't show anything in particular?

I don't know.
I was just saying, just because there is no plain text there does mean that there isn't any (because it could be using some type of compression)

What I know/guess is that it should be a some sort of system start-up via RF, data sent by the central management radio.

And this means this IP DATA could be structured who knows how.

 

[Hunno]

Could the Motorola smartPTT have been used here?