p7200 tdma problem

[kb4cvn]

You need to have FDMA is slots 1 and 2 and TDMA in 9 and 10.

I am trying to understand the reasoning of specifying SLOTS 1/2 and SLOT 9/10 in the above?

From what I am seeing, you are attempting to apply the data format used in a scanning receiver to a commercial radio. The reason for the sixteen (16) different possible entries for the IDEN scheme are for different RF tower sites (or simulcast clusters) on the same larger radio system where the data for the sites might be different. An example would be a system comprised of 700 MHz and 800 MHz frequency band sites, which also have different TX offset spacing. Or, in another example, a system which shared common frequencies on its sites, but some talkgroups were P-25 Phase-1 (FMDA Full-Rate) and others which are P-25 Phase-2 (TDMA). Please see RPM Help Screen Photo

I have a local county ( Pittsylvania County, VA - Pittsylvania County Trunking System, Chatham, Virginia - Scanner Frequencies ) where the Fire/EMS dispatch talkgroup is Phase-1, and everything else on the system is Phase-2. This was done to allow the Volunteer firefighters and rescue squad members to monitor the dispatch talkgroup with an affordable (Phase-1) trunking scanner, and not forcing them to purchase a (very pricy!) Phase-2 capable model receiver. Please see VA-PITT IDEN Data Screen Photo

Also, with the advent of the Unity multi-Band mobile and portable radios, you have a P-25 trunking system with Control Channels and Working Channels scattered out across several frequency bands on each site! I know of two such systems, both of which were installed in 2009. (One in Virginia, the other in Tennessee) One of them is near me, and has five frequency pairs on 800 MHz, three frequency pairs on UHF, and three frequency pairs on VHF-Highband. The control channel can be rotated across any frequency pair on any band. And working channel assignments for group calls can be assigned to any frequency pair on any band. This was done for interference and jamming resistance. Please see BWXTNOGL IDEN Data Screen Photo

 

[wanabe]

Boy now I'm really confused KB4CVN ! So in essence I only need slot 1, 854.0000, 12.500, -45.000, FDMA, and slot 2, 854.0000, 12.500, -45.0000 TDMA ? Let me know please and I will change it. Thank you very much for your help!

I am trying to understand the reasoning of specifying SLOTS 1/2 and SLOT 9/10 in the above?

From what I am seeing, you are attempting to apply the data format used in a scanning receiver to a commercial radio. The reason for the sixteen (16) different possible entries for the IDEN scheme are for different RF tower sites (or simulcast clusters) on the same larger radio system where the data for the sites might be different. An example would be a system comprised of 700 MHz and 800 MHz frequency band sites, which also have different TX offset spacing. Or, in another example, a system which shared common frequencies on its sites, but some talkgroups were P-25 Phase-1 (FMDA Full-Rate) and others which are P-25 Phase-2 (TDMA). Please see RPM Help Screen Photo

I have a local county ( Pittsylvania County, VA - Pittsylvania County Trunking System, Chatham, Virginia - Scanner Frequencies ) where the Fire/EMS dispatch talkgroup is Phase-1, and everything else on the system is Phase-2. This was done to allow the Volunteer firefighters and rescue squad members to monitor the dispatch talkgroup with an affordable (Phase-1) trunking scanner, and not forcing them to purchase a (very pricy!) Phase-2 capable model receiver. Please see VA-PITT IDEN Data Screen Photo

Also, with the advent of the Unity multi-Band mobile and portable radios, you have a P-25 trunking system with Control Channels and Working Channels scattered out across several frequency bands on each site! I know of two such systems, both of which were installed in 2009. (One in Virginia, the other in Tennessee) One of them is near me, and has five frequency pairs on 800 MHz, three frequency pairs on UHF, and three frequency pairs on VHF-Highband. The control channel can be rotated across any frequency pair on any band. And working channel assignments for group calls can be assigned to any frequency pair on any band. This was done for interference and jamming resistance. Please see BWXTNOGL IDEN Data Screen Photo

 

[kb4cvn]

...Boy now I'm really confused KB4CVN ! So in essence I only need slot 1, 854.0000, 12.500, -45.000, FDMA, and slot 2, 854.0000, 12.500, -45.0000 TDMA ? Let me know please and I will change it. Thank you very much for your help!

Yes, that what I use personally.

And that is what I taught quarterly to all new Engineering employees at Harris before I retired in 2012.

 

[kb4cvn]

UPDATE ON THIS TOPIC - Thursady September 24th.

CRITICAL CHANGES TO HOW RPM FUNCTIONS WITH IDEN TABLES, IMPLEMENTED AFTER REVISION 9


FYI EVERYONE
It appears that after I retired, Harris incorporated several changes/updates to the RPM software application, without mentioning it outside their organization, and has not been published in either a TSM or Help Screen in the software.

I apologize for any confusion with my earlier posting. I too got blindsided on this change.




received this e-mail this morning from a former coworker at Harris:





From:
Sent: Thursday, 2015-09-24 02:58
To: Mark Cobbeldick
Subject: Re: IDEN Table Question ...Any Changes to RPM after I retired?

Mark:
That's the way it must be, starting with Revision 9 or 10 of RPM. Slots 1-8 are for full rate entries and 9-16 are for half rate (TDMA) entries.

Different systems may have different IDEN values and MUST(!) exactly match the base station tables (starting frequency and channel spacing step size).

It's just the System Engineering set it up in the station SitePro's in Mastr3's and control module in the newer Mastr5's.

Karen over in RPM Engineering had to alter RPM to match what the gang in the Systems side of the house to match, otherwise Phase-2 with mixed Phase-1 would not behave correctly! Everyone had to go back and revise their IDEN tables on mixed-Phase systems in the last year to make it work. This has not been published in a TSM or revised in the RPM Helpscreens yet.

I hope this has not impacted any of your efforts.


Down in Tassie now, will be back in the Burg next month. Lunch ???



Best '73
Skeeter

 

[wanabe]

Thank you Mark for that information. So in your opinion, do I use slots 1 and 2 for the FDMA band and slots 9 and 10 for the TDMA band for this system like DisasterGuy suggested? And, do I need all 4 slots filled in? TIA

 

[mikewazowski]

Your Pro96Com screenshot shows bandplans in Slots 0 and 8 which corresponds to 1 and 9 on your radio.

Your other Pro96Com screen shots shows channels being broadcast from those two slots as well.

Why you would enter in anything from any other slots is beyond me. If the system isn't using them, there's no reason to put anything into them.

 

[Fearthis50]

disasterguy so are you saying you need an aac to program system i have rpm13 it lets me read a valid radio and program another radio with same info but i hear nothing

 

[DisasterGuy]

I haven't used the original RPM in a few years so I don't recall the version where AAC became mandatory for all systems. It was mandatory for some systems prior to that. It has definitely been required in all versions of RPM2. AAC exists in both a PC locked flavor as well as a USB dongle flavor.

disasterguy so are you saying you need an aac to program system i have rpm13 it lets me read a valid radio and program another radio with same info but i hear nothing

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[Fearthis50]

Thanks still doesnt make sense to me ....I gotta have firmware issue

 

[DisasterGuy]

Are you sure that your iDEN table matches what the system is broadcasting and that the radio is featured for Phase 2 if a Phase 2 transmission?

Thanks still doesnt make sense to me ....I gotta have firmware issue

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[KevinC]

Please continue discussion in the other thread concerning this so we don't have discontinuation of the issue...

https://forums.radioreference.com/h...n-forum/376323-p25-phase-2-harris-system.html