LAFD 700 Mhz channels ?

[zerg901]

The 2011 Communications Manual for the Los Angeles City Fire Department says that they have 3 direct digital channels at 700 Mhz - they are in the XTS 5000 portable radios - and they are in the XTS 5000 mobiles that are installed in "late model fire apparatus". These channels are located at the end of Zones 7, 8, and 9 - they are labelled 7 Tac 19 D - 7 Tac 20 D - 7 Tac 21 D

There are more national interops channels in Zone 7 in the radios - beginning with 7Tac51D

The 3 direct channels are reportedly licensed to LAFD - therefore, if I wasnt so lazy, maybe I could find them in the FCC ULS - maybe not

Anyone have more info? NACs? Repeater (if any) locations? etc

I do not see any mention of 700 Mhz channels for LAFD in the Radio Ref database as of 10 minutes ago - and I dont see any mention of 7Tac19D in this forum

 

[LAflyer]

LACoFD and other local agencies also have 700Mhz interop channels avail on some of their radio loads. They are part of the National FCC Public Safety Interop pool.

Not sure exactly which ones LAFD has loaded however below are the authorized channels for fire/ems usage. If repeater paired (which they are not per your "direct" comment) its +30Mhz

769.89375
769.99375
769.39375
769.49375
773.50625
773.85625
773.00625
773.35625

Additionally there are another 24 700mhz pairs that used for law enforcement or other public safety interop which are likely the additional ones you mention being avail starting with Tac51D.

As far as the RR Db they are listed in the national section
Interoperability Scanner Frequencies and Radio Frequency Reference

 

[zerg901]

The 2011 LAFD Comm Manual is here -

https://sites.google.com/site/losangelescitycalifpubsafety/home/lafd

You can click on the 2011 SubPage and then "Comm Manual 2011"

----------------------

In addition - for older documents - you can click on the following SubPages - "Comms - Manual" - or - "Radio Manual - 1981 and 1991"

 

[LAflyer]

Below LA City license has 12 700mhz frequencies the city is licensed on for mobile/non repeater use.

WQFY827 (LOS ANGELES, CITY OF) FCC Callsign Details

 

[scanfan22]

id all of LAFD comms moving over to 700mhz? I thought they were going to use P25?

 

[zerg901]

scanfan22 - no one said anything about all LAFD comms moving to 700 Mhz in this thread - perhaps you misunderstood

 

[scanfan22]

can you enlighten me please?

 

[zerg901]

Apparently LAFD has a few "extra" channels in their radios - at 700 Mhz - possibly in P25 mode - unknown what they are used for - unknown on NACs - maybe mostly used for short range comms

 

[zerg901]

Los Angeles County, California (CA) Scanner Frequencies and Radio Frequency Reference

I see three 700 Mhz freqs listed for LAFD now

 

[nd5y]

Los Angeles County, California (CA) Scanner Frequencies and Radio Frequency Reference

I see three 700 Mhz freqs listed for LAFD now

Those are the nationwide low power itinerant channels.
Common Public Safety - The RadioReference Wiki

 

[zerg901]

Something doesnt add up - the channels should be digital but the database shows PLs

 

[GTR8000]

Something doesnt add up - the channels should be digital but the database shows PLs

That is incorrect. There are 12 low power/itinerant 700 MHz frequencies (3 nationwide, 9 regional) that can be used in narrowband analog mode.

Please refer to this listing:

Interoperability Scanner Frequencies and Radio Frequency Reference

The three 700 MHz frequencies listed under LAFD in the database are the three nationwide frequencies.

 

[zerg901]

First post says digital - see post 1

 

[LAflyer]

They are non-repeater and are analog.

The "D" in the naming simply means Direct, not Digital.

These 3 can be used as simplex fireground, the same as how LAFD uses the I-TAC's, or its own Tac's.

 

[GTR8000]

I think Peter is confused by the fact that he read "digital" in their 2011 Communications manual, but he can't figure out why the three frequencies listed in the RRDB are analog. Of course, if he actually looked at the frequencies that are listed, then compared them to the Interops nationwide list that I linked to, it's pretty clear. Or if he read your posts and processed the info you are giving him, he might get the picture.

 

[zerg901]

This is what the Manual says.

In addition to the systems described above, the Department has additional ―simplex‖ or ―direct‖ digital channels in the 700 MHz band programmed in the XTS 5000 portable radios carried by all members, and the XTL 5000 mobile radios installed in late model apparatus. These channels are available for use only in ―simplex‖ or ―direct‖ mode at this time.

There are three 700 MHz digital channels licensed to the LFD located at the end of Zones 7, 8 and 9, accessed via the front panel key pad identified as channels 7TAC19D, 7TAC20D and 7TAC21D. ―7‖ identifies it as a 700 MHz channel, ―TAC19‖ identifies the channel number and the ―D‖ identifies the channel as a digital channel.

 

[GTR8000]

Yes, Peter, we read the manual. The point you are missing is that the three frequencies currently listed in the database are clearly not the "digital" frequencies they are talking about in the manual. Please, go back and look at those three frequencies and compare them to the low power NFM frequencies on the Nationwide Interops page. Then take a look at the rest of the 700 MHz interop frequencies, and compare the channel names to the names listed in LAFD's manual, and with the 700 MHz frequencies they are actually licensed for, and hopefully you will finally understand what you're looking at.

 

[zerg901]

Sorry - still does not add up. Note below - no mention of 700 Mhz analog channels.

Does anyone have a copy of the channel load for the radios? That would sort this out in a hurry.

Peter Sz

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From the LAFD Manual

Currently the LAFD uses four different frequency bands. The bands are defined as follows:
1. 800 MHz – The primary radio used for LAFD operations. Portable radios are indicated with red engravings and a red antenna band.
2. 700 MHz – Digital simplex channels which can be used for drills and for emergency operations for non-critical messaging. The 700 MHz band is programmed into the ―red‖ 700/800 MHz band radios.
3. Ultra High Frequency (UHF / 500 MHz) – Used for mutual aid incidents with surrounding fire and police agencies. Also used for Hospital Base Station contact. UHF Portable radios are indicated with blue engravings and a blue antenna band.
4. Very High Frequency (VHF / 100MHz) – Used by surrounding fire agencies for tactical and routine operations. Also used as the Hospital Emergency Administrative Radio (HEAR). VHF Portable radios are indicated with white engravings and a white antenna band.

 

[LAflyer]

Why the argument -- the NAC for those 3 would be 293 which the the Federal interop standard, while 156.7 is the analog standard.

RR received a copy of LAFD radio load a couple moths back and the Db was updated accordingly. Only analog channels are listed as that is what the LAFD uses and bulk of radio's have programmed.

RR per policy will not list a complete A to Z radio load as many of the channels are duplicates, not licensed directly to the user, common interops, or simply not used in day to day ops.
For LAFD we opted to list the I-Call and I-TAC as they can be used daily as overflow Tac channels and by specially units such as LAX crash trucks.

 

[Mikerh91]

I will clear up the confusion.
1. The communications manual link that was post in an earlier thread is already out of date. That was for the 2011 channel plans. It has not been update recently.

2. The normal LAFD 18 800 MHz simulcast radio channels are not going away. There are going to remain wide band analog. Rebanding may occur later this year or next year, but the LAFD will remain on 800 MHz analog wide band till further notice. The LAFD is not going to 700 MHz.

3. As also mentioned above the LAFD has programmed 30 700 MHz national interop channels in their radios which are digital and narrow band. These are programmed according to the APCO and NPSTC national channel naming convention

4. The LAFD also received 3 low power mobile interant channels from the 700 MHz regional planning committee. These channels are low power, analog wide band channels. The LAFD can name them what ever they want. In 2011 they were named 7TAC19D, 7TAC20D, and 7TAC21D. In 2012 these channels were renamed again to LFD T19TA, LFD T20TA and LFD T21TA.

Be Safe. Mike