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order of freq's for a type 2 smartnet system

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SCPD

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I was told it was better to program this system from highest freq to the lowest freq. while entering them in the trunk mode. I have a Pro-90 & 2 BC-895'S.(OLDer radios)
 

W4KRR

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With Motorola systems, it really doesn't make any difference what order the frequencies are entered in. However, the scanner will find the control channel faster if you program the control channel or channels in first.
 

DickH

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investigator16 said:
I was told it was better to program this system from highest freq to the lowest freq. while entering them in the trunk mode. I have a Pro-90 & 2 BC-895'S.(OLDer radios)

As Ken said, it probably doesn't matter.
HOWEVER, a few years ago, before I got a trunk tracker, I was trying to monitor 2 Motorola TYpe II systems in my area.
It is difficult, at best. What you need to do is keep your finger on the SCAN button and when someone talks you have to keep pushing SCAN until you find the answer. If the system is busy it is nearly impossible to follow a conversation.
While doing this I discovered that in one system the conversations jumped in ascending freq. order, while in the other system, they jumped downward.
So, I believe the freqs. ARE in a particular order, but trunk trackers change freqs. based on the Control Channel data, so we never notice.
Dick
 

wavetar

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Yes, the actual order the channels are used is hard-set in the firmware of the controller, and can vary for different reasons. For example, a system in our area is set as follows:

Channel 9 - regular channel
Channel 8 - regular channel
Channel 7 - regular channel
Channel 4 - regular channel
Channel 5 - phone patch capable
Channel 6 - phone patch capable
Channel 1 - encryption capable
Channel 2 - encryption capable
Channel 3 - encryption capable

As you can see, the patch & encryption channels are further down the line. This is done to try & keep them free for patch & encryption requests. The order resets after a certain amount of time, so if the system isn't busy, channel 9 will be picked nearly every time. Even on a semi-busy system, the last 3 channels would only be rarely used for a regular voice call.

To muddy up the waters a bit more, a technician can go into the controller settings and 'protect' one or more channels, which forces it to the bottom of the list. This is sometimes done if a channel is receiving intermittant interference which is difficult to isolate.

Todd
 

grem467

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on the jacksonville,FL FCRS System, they repeaters follow a pattern of lowest freq to highest, the highest freq repeater is the only one its found the CWID on, and there are no repeaters that dont see traffic on this pattern.
its kinda neat to watch the repeaters light up and all that in trunker.
 
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