Pro 651 (601) multi-site question

Status
Not open for further replies.

Spitfire8520

Might be slightly less clueless! =)
Joined
Jun 29, 2009
Messages
2,036
Reaction score
193
Location
Colorado
I personally switch between what mode I use very often, depending on what I am doing at any point in time.

If I'm out and moving, I generally want to target more localized traffic so I use the Roam setting to lock onto a site with good decode for the immediate area in hopes that a public safety user is also affiliated to the same site. When that decode drops under the Threshold Lo, then it will drop it and attempt to look for one that is better than your Threshold Hi.

If I'm interested in hearing as much as possibly can, then I might use Stat to go through as many control channels as I can receive in order to hear whatever I can, especially if I'm more stationary. If I want to focus on a trunked system, I might set the Check All CC to Yes. If I want to focus more on conventional traffic, then it will be set to No.

I don't use Off all that often, but it should basically find the first valid control channel and stay with it until the decode drops below it being recognized as a control channel. I believe it should basically follow how you have it programmed into the scanner beginning to end in that order. It might be useful for if you know you want it to follow control channels in an exact order, but I don't use it enough to say for sure.
 

jimijodie

Member
Joined
Mar 8, 2012
Messages
61
Reaction score
1
Location
Central IL
Theres only 3 control channels in my are so wouldn't I be safe on either settings any where ?
 

Spitfire8520

Might be slightly less clueless! =)
Joined
Jun 29, 2009
Messages
2,036
Reaction score
193
Location
Colorado
Theres only 3 control channels in my are so wouldn't I be safe on either settings any where ?

Maybe. The difference between Roam and Off would probably not make much of a difference. Roam and Stat can lead to you hearing different things if you're talking about different sites and not primary vs alternate control channels of the same site. Roam/Off will only stay on one control channel and will avoid changing control channels while Stat intentionally switch control channels on each pass. It all deals with how trunked radio systems work and how users are affiliating on those sites.
 

jimijodie

Member
Joined
Mar 8, 2012
Messages
61
Reaction score
1
Location
Central IL
Maybe. The difference between Roam and Off would probably not make much of a difference. Roam and Stat can lead to you hearing different things if you're talking about different sites and not primary vs alternate control channels of the same site. Roam/Off will only stay on one control channel and will avoid changing control channels while Stat intentionally switch control channels on each pass. It all deals with how trunked radio systems work and how users are affiliating on those sites.

It seems like on any setting as I drive around I only pick up signals in certain areas where I know I should be getting something. Would adjusting my hi & lo decode threshold help in this you think ?
Thanks
 

cherubim

Member
Joined
Dec 30, 2011
Messages
509
Reaction score
106
Location
Sydney, Australia
The main reason to use the Multisite Trunking option is to hear more traffic. If one is monitoring a simulcast system then Multisite is not needed. On a Multicast system it's a preferred setting.

Multisite OFF is the default setting for simulcast systems as all the sites use the same control channel frequencies. This option can also be used if Multisite STAT or ROAM fail to work reliably or are not needed.

Multisite STAT only works well if the control channels are of good quality. One also should not try to scan too many sites with this setting as one can easily miss traffic. I prefer to use only 4-5 sites for Multisite STAT when using my PSR-600 as a base station.

Multisite ROAM works better when one is mobile as it locks onto a site that meets the threshold settings however one still needs to check that the various sites are within suitable range. I have used the ROAM setting on a base station setup and found it misses too much traffic unless one tweaks the threshold settings accordingly.
 
Status
Not open for further replies.
Top