Seattle/KC Base Freqs?

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AlmostHandy

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What are base freqs?

The database doesn't list any base freqs or any other "custom frequency table" info for these areas like they do in some other areas. Does this mean that I should be using the default base freqs in my radio?

How does having the right or wrong base freqs affect my scanning?
 

AlmostHandy

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kellykeeton

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king county has not re-branded so all defaults on your radio will work. the database on RR is correct just program in the control channels or all if your scanner wont control channel only


How does having the right or wrong base freqs affect my scanning?


it would cause your radio to "not pick up anything"
 

AtomicTaco

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That article is about VHF/UHF systems, not UHF-Hi (800). If you're talking about this system then no custom settings are needed. For your Pro-97, you can start entering the control channel and talkgroups right out of the box, provided you put batteries in first.
 

kellykeeton

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That article is about VHF/UHF systems, not UHF-Hi (800). If you're talking about this system then no custom settings are needed. For your Pro-97, you can start entering the control channel and talkgroups right out of the box, provided you put batteries in first.

but that isn't relevant as there is little no (none?) in the RR.com for VHF trunking in KC

the article still applies to 800 as the same basic principles for trunking on rebranded system still applies
 
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AtomicTaco

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but that isnt relevant as there is little no (none?) in the RR.com for VHF trunking the article still applies to 800 as the same principles
Not really; the rules in VHF land are much different than in 800. One example is that 800 has a 45 kHz standard offset between repeater inputs and outputs, where VHF has no standard.
 

AtomicTaco

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Yeah, the principles still apply. However, I don't know of any 800 systems in the Puget Sound area that need a custom table.
 

kellykeeton

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yea thats what I posted in my reply up there ^^ i assume he was talking about rebranded 800's that some areas have right now and that RR has tables for.
 

AlmostHandy

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Ok, so custom tables are only used for the rebanded areas?

I had heard that the pro97 won't support rebanding.

Does that mean that when the Puget Sound rebands all it's radios, my scanner will stop working altogether, or will it just need to have the custom freq tables programmed?
 

AtomicTaco

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Ok, so custom tables are only used for the rebanded areas?
That is one use for them, but that isn't why they were created.
I had heard that the pro97 won't support rebanding.
That is correct.
Does that mean that when the Puget Sound rebands all it's radios, my scanner will stop working altogether, or will it just need to have the custom freq tables programmed?
I'll try and summarize rebanding very quickly:

This applies only to trunked systems in the 800 range. Everything else you listen to will not change (although there is the push of going to ultranarrowband, but that's another topic).
After a user keys up and the controller has assigned a frequency pair, the controller sends out a message on the control channel saying "Hey, everyone listening to talkgroup 16 switch to channel 01". Everyone's radios and your scanner then switches. They all switch to 851.0125 or whatever channel 01 is (I'm pretty sure I'm correct though). Now after rebanding, the channels are different. Channel 17 may have been 851.2375, but now maybe it's 851.1875. (The specific channels aren't important in this example). All of the radios that belong on the system can be reprogrammed (actually some can't, and they'll be surplussed) to know that channel 17 is now different, but your 97 can't. It'll still go to 851.2375, hear nothing (or hear another transmission), and then keep searching.

So no, your 97 won't be a brick, it just won't be able to monitor the 800 trunked systems after they get rebanded. When that actually happens though depends a lot on our floppy-headed friends to the north.
 

AlmostHandy

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Ok, That makes sense.

Regarding the scanner models that can support rebanding; will the support upgrade be a firmware revision, or something of the sort?

Would being able to adjust custom freq tables allow me to track a rebanded trunked system, or does it not work that way?
 

AtomicTaco

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Regarding the scanner models that can support rebanding; will the support upgrade be a firmware revision, or something of the sort?
I know that's what Uniden is planning for their scanners. I don't know about GRE/RS, but probably the same thing.
Would being able to adjust custom freq tables allow me to track a rebanded trunked system, or does it not work that way?
No, because rebanding changes the assigned frequency for the channel numbers, and you need to tell the radio/scanner the new frequencies for each channel number. A custom table just defines the base (lowest) frequency, offset (spacing), etc.
 

Ishyid

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What are base freqs?

The database doesn't list any base freqs or any other "custom frequency table" info for these areas like they do in some other areas. Does this mean that I should be using the default base freqs in my radio?

How does having the right or wrong base freqs affect my scanning?

To be honest with you man, I've done a few ride alongs with SFD for my fire training, and their calls are non-stop across the city. You are sitting there in the rig, listening tone after tone of all the medical aid calls going out across the city. As you might know they dispatches are all aoutmated. And to tell you the truth I wouldnt monitor that city because: 1. I live to far away to pick it up 2. Extremly busy to make any sence 3. It would get boring to hear all the same calls going out over and over again. Just to let you know what Seattls dispatches are like.

-Josh-
 
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