Should I enter all the other Freq.'s in the Freq Section

[loumaag]

The question is how many CC frequencies can you program into the Moto radios so that when they come up, they can find a CC to work on. I assume that they must 'scan' and do no 'search' for a CC...
...so where do I find out how many CCs can be entered?

I am pretty sure it depends on the model of the radio. Additionally remember that it really doesn't have to scan for CC's on a SmartZone system. It already knows what the adjacent towers/sites are broadcasting on (neighbor sites).

I am pretty sure that the newer radios work this way; when you first turn them on, they scan the frequencies programmed as CC's and pick the strongest one to lock on. When that one gets weaker, it checks for other either programmed or announced CC's on the system. If it can't find any, it starts to scan all the channels looking for it's home SysID, failing at that, it begins to look at other systems that it may be allowed on. Remember, these radios are all software controlled. The days of limiting the number of frequencies it can "see" are long past.

If this explaination fails, I am sure someone will be more than happy to point out my ignorance. :roll:

 

[b52hbuff]

I am pretty sure it depends on the model of the radio. Additionally remember that it really doesn't have to scan for CC's on a SmartZone system. It already knows what the adjacent towers/sites are broadcasting on (neighbor sites).

I am pretty sure that the newer radios work this way; when you first turn them on, they scan the frequencies programmed as CC's and pick the strongest one to lock on. When that one gets weaker, it checks for other either programmed or announced CC's on the system. If it can't find any, it starts to scan all the channels looking for it's home SysID, failing at that, it begins to look at other systems that it may be allowed on. Remember, these radios are all software controlled. The days of limiting the number of frequencies it can "see" are long past.

If this explaination fails, I am sure someone will be more than happy to point out my ignorance. :roll:

...I left in the long note since you sorta 'contradict' yourself.

Let's ignore the 'moving cell' problem and focus on the power on... When
a radio comes up, it _must_ 'scan' for the control channel. How many
frequenceis can be in that scan list? That number is the maximum bank
size that a trunking scanner must support to work in a smartzone
environment without using multiple banks...

 

[b52hbuff]

So how can a radio with only four possible frequencies find and
associate to a a large multisite system?

If it's just a large area it covers like Sacramento, CA then you have your 4 cc's and a crap load of vc's. Sac county has like 24 vc's to cover all the talkgroups they have.

If for example it's a state patrol system then each main city will have a control channel (maybe only 1 or 2) and however many vc's they deem necessary.

Think Moto radio, and not scanner. I understand that CC-only scanners
(and Moto radios) work because there is a 1 to 1 mapping between
channel number and frequency (unlike non-800Moto, EDACS, & LTR).

My question is how many channels does a moto radio need to store (scan)
in order to be able to work with a large multi-site system. If you look
at any large system here, you'll notice that they have more that 4
possible CCs.

Which leads me to a simple conclusion, a SmartZone radio has a smaller
(artificially or implementation) CC scan list than a SmartZone radio...

 

[loumaag]

Which leads me to a simple conclusion, a SmartZone radio has a smaller (artificially or implementation) CC scan list than a SmartZone radio...

I think you mis-typed something here; however, forget scan list. Unlike your or my scanner, the radio is capabale of scanning every frequency in the band. There are defined channels and the radio can find them all. If the radio doesn't (on power on) find one in the pre-programmed scan list, it will check the entire band until if finds:
a) A CC on its system.
b) A CC on an allowed secondary system.
Assuming we are talking about a newer radio and not some ancient MoTrac.

 

[scanfan03]

Think Moto radio, and not scanner.

I think you are thinking scanner and not radio (not to be rude). On power up the radio looks for the preprogrammed control channels on its home site. If it cant find any it looks for a site to affiliate with, if it doesn't find one there, then i don't know what it does (doesn't talk???).

I know that someone can probably explain this better than me, so please do. I am not an expert at radios, just scanners. JK

 

[loumaag]

Think Moto radio, and not scanner.

I think you are thinking scanner and not radio (not to be rude)....

His original question was about Moto radios, not scanners. I guess that is why he said what he did. No one mentioned scanners (recently) until you did. I guess it would have been better to start a new thread than to bump this one back up to the top. :wink:

 

[wavetar]

The maximum number of control channels that can be programmed into a Motorola radio is 32. The radio must be set in 'SmartZone' mode to allow the 32 channels. In systems with more than 32 sites, frequencies are re-used. Engineering of the sites must take this into account to ensure there is adequate distance between sites which share frequencies.

Todd

 

[loumaag]

The maximum number of control channels that can be programmed into a Motorola radio is 32. The radio must be set in 'SmartZone' mode to allow the 32 channels. In systems with more than 32 sites, frequencies are re-used. Engineering of the sites must take this into account to ensure there is adequate distance between sites which share frequencies.

Todd

There 'ya go.

 

[scanfan03]

His original question was about Moto radios, not scanners. I guess that is why he said what he did. No one mentioned scanners (recently) until you did. I guess it would have been better to start a new thread than to bump this one back up to the top. :wink:

You were talking about scanners and scan lists, I guess I mis understood you.