APX APX900 NAS issues

[swfluncensored]

Is the "Full Spectrum Control Channel Scan" checked off or on?

It is checked off.

would you happen to have that talkgroup in the announcement group box in the trunking personality?

It is not in the announcement group box. There is no talkgroup set to it.

Put the TX Inhibit option on the menu and enable it, then put the antenna back on, What does it do then? Is it set to smartzone/inter/intra wacn? Are the only control channels for that particular system in that specific trunking system? As asked above, is full spectrum scan enabled?

I have always had the TX Inhibit option on the menu, and always had it enabled. It was still doing it. The system is set to just Smartzone WACN, and full spectrum scan is not enabled.

That right there seems to be a common factor. That the problematic system is in fringe coverage. It's like the radio doesn't quite obey its own programming rules when it's in a fringe reception scenario.

Would this same issue occur on a Harris?

 

[RFI-EMI-GUY]

I am currently hearing snippets of sometimes clear, sometimes simulcast-distorted radio traffic from a neighboring county's sheriff's office. My radio, without red-lighting, is silently attempting to affiliate to the TRS. I know this because every time I receive traffic, I'm getting the "SYS-REG: xxxx" over the RID. This is not my only suspicion.

You say the red light is not flashing. Can you confirm that the radio is transmitting by use of a field strength meter? What is your other suspicion? If you have an 800 MHz isolator you can dummy load the TX while receiving from an antenna.

 

[swfluncensored]

You say the red light is not flashing. Can you confirm that the radio is transmitting by use of a field strength meter? What is your other suspicion? If you have an 800 MHz isolator you can dummy load the TX while receiving from an antenna.

I don't have any of that.. I'm just seeing "SYS-REG:" and a few numbers following over the UID when Rxing the talkgroup. Not getting RSSI, no TX symbol, and no red light flashing. I've come to the conclusion that it may just be a wonky NAS feature you get when scanning Harris systems - not affiliation.

 

[RFI-EMI-GUY]

I wonder if this is part of the LLA deployment.

https://www.motorolasolutions.com/content/dam/msi/docs/astro-25/astro-systems-authentication-solutions.pdf

 

[clbsquared]

I've come to the conclusion that it may just be a wonky NAS feature you get when scanning Harris systems - not affiliation.

So, this is a Harris system? You probably should have led with that.

 

[swfluncensored]

So, this is a Harris system? You probably should have led with that.

Yes, this is a Harris system. My apologies, I thought I had included that in the first post.

 

[natedawg1604]

Putting aside the specifics of this thread (NAS), what exactly does "SYS-REG" mean and why would a subscriber radio display this message?

 

[clbsquared]

Putting aside the specifics of this thread (NAS), what exactly does "SYS-REG" mean and why would a subscriber radio display this message?

Most of the time it means that subscriber ID has been removed from the system and is no longer authorized. In this case it means he programmed his radio using a duplicate ID and it is trying to affiliate. Which ultimately means the radio wasn’t programmed for NAS properly. Of course that’s just pure speculation on my part.
I sense there’s a little more going on here that we aren’t aware of.

 

[ElroyJetson]

NAS scanning always requires you to make a choice regarding the radio's ID. It's never going to be a "proper" choice so you try to figure out an ID that has a low probability of being a duplicate or of being one that will be trolled by suspicicious system users for unauthorized radios, and stunning them. The method I would suggest is to figure out the ranges of IDs used by various departments, which are, as far as I know, most likely to be assigned in reserved blocks by department, and start thinking. Let's say that for example, you spend plenty of time gathering data on the system and determine that the road and bridge department apparently has an allocated block of radio IDs spanning from 4500 to 4799. You've never found an R&B ID in the 4800 range but you've found that between 4500 and 4799 there have been nothing but R&B radios. Yet you've never actually seen an active ID in the top range of this block. Because they don't HAVE 300 active radios, apparently. So...hiding somewhere in the upper 4700s, where you've never seen an active ID, would seem to be as safe a choice as any.

 

[chrismol1]

Unless something has changed, If OP has Tx Inhibit enabled as reported and which reports "Tx inhibited" on PTT , which is a saved option on power down/off there would be no transmissions coming from the radio.

 

[chrismol1]

I don't have any of that.. I'm just seeing "SYS-REG:" and a few numbers following over the UID when Rxing the talkgroup. Not getting RSSI, no TX symbol, and no red light flashing. I've come to the conclusion that it may just be a wonky NAS feature you get when scanning Harris systems - not affiliation.

Okay, so its Tx inhitibted, Is it SmartZone, SmartZone Omnlink, or Inter/Intra WACN? Is "Motorola Prop Features" checked? I know you're using CPS 30, what is the firmware version?

 

[tsalmrsystemtech]

I sell these radios so if you want it correctly fixed then P/M me.

 

[swfluncensored]

NAS scanning always requires you to make a choice regarding the radio's ID. It's never going to be a "proper" choice so you try to figure out an ID that has a low probability of being a duplicate or of being one that will be trolled by suspicicious system users for unauthorized radios, and stunning them. The method I would suggest is to figure out the ranges of IDs used by various departments, which are, as far as I know, most likely to be assigned in reserved blocks by department, and start thinking. Let's say that for example, you spend plenty of time gathering data on the system and determine that the road and bridge department apparently has an allocated block of radio IDs spanning from 4500 to 4799. You've never found an R&B ID in the 4800 range but you've found that between 4500 and 4799 there have been nothing but R&B radios. Yet you've never actually seen an active ID in the top range of this block. Because they don't HAVE 300 active radios, apparently. So...hiding somewhere in the upper 4700s, where you've never seen an active ID, would seem to be as safe a choice as any.

It seems all counties down here are pretty streamlined with their IDs - mobiles/portables all start with “68” or “69” and tend to be 7 digits long. Dispatch consoles are usually triple/quad digit.. (so 102, 206, 601, or 6001, etc etc). I can’t find a correlation between IDs.. as they seem to be all over the place. My radio is NOT showing the red bar, with white text, saying something like “Sys reg rfsd”.

Okay, so its Tx inhitibted, Is it SmartZone, SmartZone Omnlink, or Inter/Intra WACN? Is "Motorola Prop Features" checked? I know you're using CPS 30, what is the firmware version?

The firmware version is R29. Tx is inhibited THRU THE MENU, like you said. Upon clicking PTT, it virtually displays “Tx inhibited“ where the UID should be. It is a SmartZone system and Motorola Prop Features IS checked.

Unless something has changed, If OP has Tx Inhibit enabled as reported and which reports "Tx inhibited" on PTT , which is a saved option on power down/off there would be no transmissions coming from the radio.

This is also what I was thinking, which is why I am a little confused. I haven’t heard any transmissions since.

 

[swfluncensored]

It seems all counties down here are pretty streamlined with their IDs - mobiles/portables all start with “68” or “69” and tend to be 7 digits long. Dispatch consoles are usually triple/quad digit.. (so 102, 206, 601, or 6001, etc etc). I can’t find a correlation between IDs.. as they seem to be all over the place. My radio is NOT showing the red bar, with white text, saying something like “Sys reg rfsd”.


The firmware version is R29. Tx is inhibited THRU THE MENU, like you said. Upon clicking PTT, it virtually displays “Tx inhibited“ where the UID should be. It is a SmartZone system and Motorola Prop Features IS checked.


This is also what I was thinking, which is why I am a little confused. I haven’t heard any transmissions since.

UPDATE: Just happened a few moments ago. I was incorrect in my diagnosis - the radio is displaying “SYS:” along with a few numbers. It flashes over the UID when they are transmitting. Once again, the talkgroup was overriding the scan list and going off (it was NOT in the scan list). This is a Harris system.

 

[N4DES]

UPDATE: Just happened a few moments ago. I was incorrect in my diagnosis - the radio is displaying “SYS:” along with a few numbers. It flashes over the UID when they are transmitting. Once again, the talkgroup was overriding the scan list and going off (it was NOT in the scan list). This is a Harris system.

Based on your update, what you are probably seeing is a foreign user coming across an ISSI link from an adjacent TRS.

 

[swfluncensored]

Based on your update, what you are probably seeing is a foreign user coming across an ISSI link from an adjacent TRS.

Yes, it is coming from a nearby TRS. The "SYS" is displaying the system's WACN, followed by "-015" - still don't know what this indicates. It seems that it is only displaying when dispatch transmits, NOT when other units are Txing.

 

[swfluncensored]

Sister

Umm I dont know you wtf

 

[KevinC]

Umm I dont know you wtf

Hopefully you're kidding, because we're not going to play that game.

 

[N4DES]

Yes, it is coming from a nearby TRS. The "SYS" is displaying the system's WACN, followed by "-015" - still don't know what this indicates. It seems that it is only displaying when dispatch transmits, NOT when other units are Txing.

So the consoles are coming across the ISSI and the field users are resident on the other system. Not a big deal, so don't concern yourself with it.

 

[Outerdog]

This thread has Teh Dumb.