Why Aren't CB Radio Frequencies Added To The DB?
- Thread starter KC3ECJ
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Because there is nothing unique about locally used CB frequencies to distinguish them from the standard 40 channel plan. AM is AM, there are no squelch tones (aka PL/DPL), nor are they required to be licensed.
MURS and FRS are different, as they normally use PL/DPL tones to distinguish them.
The RRDB was never really intended to deal with frequencies below 30 MHz, only a few exceptions have been made, and those exceptions require some form of uniqueness to them.
RRDB Included Data
RRDB Excluded Data
"Frequencies between 25-30 MHz may be included in the database provided they are specifically used for typical land mobile-type operations, in a mode commonly used by land mobile users (FM, NFM, P25, etc)."
MURS and FRS are different, as they normally use PL/DPL tones to distinguish them.
The RRDB was never really intended to deal with frequencies below 30 MHz, only a few exceptions have been made, and those exceptions require some form of uniqueness to them.
RRDB Included Data
RRDB Excluded Data
"Frequencies between 25-30 MHz may be included in the database provided they are specifically used for typical land mobile-type operations, in a mode commonly used by land mobile users (FM, NFM, P25, etc)."
So what about airband then?
GMRS, at least previously, was authorized by the FCC for AM.
And 26-27mhz CB just got authorization for FM by the FCC.
u2brent
OAMPT
Check this link.
Airband is above 30 MHz, right? Did you read through the Database Administrator Handbook that I linked?
The standard 40 channel CB plan is already included in the nationwide listings, that's good enough for now. When and if FM modulation becomes a thing with business CB users such as your local landfills, we'll cross that bridge. Otherwise, asked and answered.
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Plus scanners are not very good CB RECEIVERS buy a CB.
ummm...
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My Icom IC-R20 and AOR AR8200 are decent for RX only
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Which is under Nationwide systems in the database. KC3ECJ... when you monitor the database on your radio you have the option of selecting Nationwide systems and toggling them on and off such as the Citizens Band.Check this link.
No.
I mean my submission of frequencies used by landfills in Lackawanna County Pennsylvania.
So what if CB is below 30mhz? Why is AM not cool if it is below 30mhz?
There's specific air band info by county.
Why can't there be specific business usage of CB by county?
Why does something having a squelch tone or not have any bearing when the most common MURS user, Walmart, usually has it in CSQ?
Or what aboou Delesa Regional School District (Franklinville) here says:
"District using non-standard DPL tones on certian channels (Marked as CSQ). These non-standard DPLs can not be programmed into current scanners. See Wiki page for full listing LINK"
Gloucester County, New Jersey (NJ) Scanner Frequencies and Radio Frequency Reference
Scanner Frequencies and Radio Frequency Reference for Gloucester County, New Jersey (NJ)
www.radioreference.com
Walmarts have migrated (or are in the process of migrating) away from MURS. Further discussion on that here. My local Walmart switched to spread spectrum which can't be tracked by scanner. Oh well, can't monitor stockroom checks anymore, tough loss
I used DTRs when I was at Macy's, but they were not used often.
The following is explained in the wiki link you provided...
District using non-standard DPL tones on certain channels (Marked as CSQ in the RR Database). These non-standard DPLs are available in various Chinese import two way radios. However they cannot be programmed into any current scanners.
So the list still won't auto load these tones to scanners, and will be listed as CSQ.
So how is this not a problem but CB is?
CB, MURS, and FRS can all be used more or less the same for 2 way voice despite being different bands.
Fire/EMS dispatch is often CSQ, not a problem?
There's also data channels throughout the DB, usually a scanner by itself can't do much or anything with these, but they're listed.
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Are you referring to the various P25 frequencies that aren't listed as control channels? If so, I believe that some systems can use any of those frequencies as a control channel. A radio admin can correct me if I'm wrong.
Stuff like mobile data terminals and telemetry.
You seem to be purposely ignoring the fact that I clearly stated that the RRDB was never intended to catalog frequencies below 30 MHz, except for a few specific exceptions such as 10 meter ham radio. CB is not one of those exceptions, save for the nationwide listing of the standard 40 channel plan. The other examples you keep bringing up are >30 MHz, and therefore have no relevance to this discussion.
But why aren't CB frequencies in the database?
And the rationale for this is what?
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