locolistener
Member
Is it possible to to put in 2 primary control frequency on a single channel. R.R. Has 2 primary c.c. But no alternate for the Clearwater FL. System.
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2 control channels
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locolistener
Member
Hi; It is a G4
locolistener
Member
The R.R. Data base shows 2 primary but no alt. So go ahead and use the the second primary as a alt.
locolistener
Member
Okay thanks 
APX8000
Sarcastic Member
Only with a Harris system. If it’s Big M, then primary and alternate.
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You can also put in all the frequencies if you want. It wont hurt the G4.
A few month ago on a Moto P25P1 system my device was showing out of range.
Turns out the system started using a CC that was not listed as Primary or Secondary.
So i ended up putting all 6 channels in the device and it works great.
Typically moto systems will have primary with usually 3-4 alternate.
On Harris i believe any channel can be the CC. Or at least thats what i recall reading on RR forums a while back.
A few month ago on a Moto P25P1 system my device was showing out of range.
Turns out the system started using a CC that was not listed as Primary or Secondary.
So i ended up putting all 6 channels in the device and it works great.
Typically moto systems will have primary with usually 3-4 alternate.
On Harris i believe any channel can be the CC. Or at least thats what i recall reading on RR forums a while back.
troymail
Silent Key
Not really - the radio really only needs to look for the active control channel once and as long as you have good reception and are in range, the others won't matter - until the control channel frequency changes.
The safest thing to do is simply program all of the known site frequencies - regardless of system type. As has been stated above, Motorola tends to limit potential control (primary or alternate) frequencies to 2-4... Harris systems are known to allow any of the site frequencies to be used as control.
You could also skip entering any control channel frequencies and use a full spectrum scan (let the radio search for your CC). It's less efficient and a bit slower to find the CC but once it does, the same holds true (it will stay there unless the CC signal is lost).
Then, of course, you can use a combination of both -- enter some or all of the known specific site frequencies and add a full spectrum scan. The "specific" list of frequencies is checked first and then, if a CC is not found, the radio will use the full spectrum scan. This would cover a situation where you didn't enter all of the site frequencies, all of the frequencies are currently listed in the database, and/or is additional frequencies happen to get added later.
Lots of options....
mdsxfire
EDBM
I put every frequency in for both the Harris and Motorola systems I monitor with no issues. I have noticed that the Harris systems has been changing CC just about every day.
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