BK Technologies P800 NAS not working on one local system, but works on another

[Yosemite855]

Hey all, I'm looking for some help troubleshooting the programming of my P800 NAS. I've used it effectively on the San Diego County RCS Trunking system for a few years now, but I cannot get it to work for the SD City 700Mhz P25 Phase 1 system. I've watched the BK Technologies video multiple times and followed the instructions to a T. The only thing I can think of is the Channel ID's tab under Trunking System isn't configured properly. The BK help section says "
P25 Trunking - Channel IDs

*** Channel ID table parameters must match system programming. Contact the System Administrator for the correct Channel ID table information. ***

Obviously for NAS I don't have the Channel ID table. For the San Diego County RCS system I simply added the band plan from the BK video and it worked. The major difference is that the San Diego City system is a 700mhz system whereas the SD County system is 800mhz.

I'd love to hear if any of you have succeeded in using a P800 for SD City.

Thanks!

 

[tunnelmot]

Sounds like you need the 700mhz bandplan. The 800 system you currently monitor probably uses the most famous bandplan of all (The default bandplan for most Moto 800 systems). Try this one.

CH ID	Type	Base (MHz)	Spacing (KHz)	Transmit Offset (MHz)
1	FDMA	851.00625	6.25	-45
2	FDMA	762.00625	6.25	+30
3	TDMA	851.01250	12.5	-45
4	TDMA	762.00625	12.5	+30

 

[tunnelmot]

Well...hopefully that worked

 

[Yosemite855]

Shoot, I’m sorry, I didn’t mean to be rude by not replying, I got distracted. First off I really appreciate the help, that was kind of you to send me a band plan. Unfortunately, it didn’t work. The one variable my radio asked for that wasn’t in your chart was bandwidth. I tried 6.25, 12.5, and 25 in different combinations and none seemed to work. I think it was at this point that I ran out of time to tinker and thought I’d respond once I tried a few more iterations but haven’t had a chance to test more since.

If I look up the frequency licenses on the FCC website (or here on RR), is there a way to calculate a band plan based off their spacing and spread? I’m a little baffled as to how this sort of thing is decided and if it’s done in a whim or calculated. I’m also puzzled by how a Unication G5 and a Uniden scanner can chase the frequencies without a band plan. Are they really that much smarter than a BK P800? Or is it more complicated if a radio has the ability to transmit as well? (Obviously not a feature being used with NAS.)

Thanks again for the help, I do really appreciate you taking the time to help me sort this out.

 

[tunnelmot]

No prob. I was being a smart a$$. Genuinely interested if you had any success.

I did check the database for your system, and the band plan I listed does seem to be the correct one. So you shouldn't need to calculate the band plan since it is published. I would double and triple check your site settings, control channels, etc. I have been known to transpose numbers when entering frequencies before even after I thought they were correct. I do Moto, but haven't played with the BK subscribers. A lot of folks get tripped up by the 700mhz band plan, so I thought I'd throw that out there.
Hopefully someone can jump in and add their 2 cents.

You show to be a premium subscriber, so you should see the band plan for any system that has had that data submitted.

 

[Yosemite855]

Ha, it’s all good. I’m just grateful for some help. I’m going to take your advice and start fresh and create a new system and re-enter the data (I’m dyslexic so transposing figures is certainly a possibility.). I didn’t know that the band plan was available in RR, I’ll do a deeper dive and see where that is.

I’ll let you know how it works out once I refresh the system in a few days.

Happy Independence Day.

 

[northstarfire0693]

I tried the RCS system for Imperial county in my Harris. Used the IDEN table on the forum. All the settings are correct. Mine has issues with CC search an WB scan. Only that one system. All the other systems I have no issue monitoring. I wonder if the RR database could be wrong

 

[IAmSixNine]

Please post the link to the system in question.
What system ID, WACN, RFSS and Site ID, and CC are you using?
On my KNG2 it seems to auto generate the channel ID (band plan). Not sure if the KNG will do the same though.

 

[KevinC]

Please post the link to the system in question.
What system ID, WACN, RFSS and Site ID, and CC are you using?
On my KNG2 it seems to auto generate the channel ID (band plan). Not sure if the KNG will do the same though.

Should be this one according to the first post...

San Diego City 700 MHz Trunking System, San Diego, California

San Diego City 700 MHz Trunking System Profile

www.radioreference.com

 

[Yosemite855]

Sounds like you need the 700mhz bandplan. The 800 system you currently monitor probably uses the most famous bandplan of all (The default bandplan for most Moto 800 systems). Try this one.

CH ID	Type	Base (MHz)	Spacing (KHz)	Transmit Offset (MHz)
1	FDMA	851.00625	6.25	-45
2	FDMA	762.00625	6.25	+30
3	TDMA	851.01250	12.5	-45
4	TDMA	762.00625	12.5	+30

I finally got NAS to work on this system. Im not sure if it was my dyslexia or stupidity, but I re-loaded the entire system and after playing with the bandwidth settings I found the correct combo. I did have to tell the radio the the bandwidth is 12.5 which is not listed in RR. Is this something I should know inherently? Seriously though, thanks for helping me out with this. I'm grateful.

 

[IAmSixNine]

on my KNG2-P800 i never needed to add bandplan. I only need
System (HEX)
WACN (HEX)
RFSS
Site
and the control channels.
The Channel ID (what motorola calls band plan) would auto populate for every system.
I can confirm that twice i had poor reception of 1 system and it caused the incorrect info to be set for Channel ID. I read radio, removed the info, programmed and then it was back to normal.