Inputs?

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andy404ns

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I was just programming New Haven County into my scanner and I noticed something odd. Well, I think it's odd. For many towns, RadioReference has two Fireground channels listed. Many times, the second one is exactly 5 MHZ above the first.
Wouldn't that mean that the second channel listed is actually the input for the first one? Maybe I'm just crazy but I'm pretty sure that's how it works. If that is how it works, wouldn't the Admins pick up on that?

Some examples are the towns of:
Derby
East Haven
Guilford
Orange (listed in reverse...)
West Haven

Any ideas? Thanks. Andy
 

Randall

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5Mhz is a common offset for uhf repeaters. one will be the input for transmitters to use and the other will be the output for receivers.
 

MarkEagleUSA

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The Input frequency is the one used by the mobile units to hit the repeater. Normally you don't need to program it.
 

andy404ns

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Yeah, I guess I didn't make myself clear. I know what an input channel is, my question is why did RadioReference decide to put the input in as a separate frequency instead of utilizing the input column next to the repeater output? Take a look at those towns if you don't know what I mean.
 

cg

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Some departments will license a low power pair and then use each frequency as a separate fireground channel. I cannot monitor those examples so I can't comment on those specific ones. I know Simsbury FD for example has 453.9625 and 458.9625 as two separate simplex channels.

chris
 

MarkEagleUSA

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andy404ns said:
my question is why did RadioReference decide to put the input in as a separate frequency instead of utilizing the input column next to the repeater output?
Sorry for the confusion...

The info in the database is only as good as that which was submitted. It's possible that's where the error (if it is in fact an error) was made. Then again, they're all labeled as Fireground or Tactical, so cg might have the answer above.
 

andy404ns

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Thanks for the info guys. I noticed that as of an hour ago, the Admins updated Hartford County and switched all the inputs into the correct spots. If that is because of this thread, then they sure do act quickly. Many thanks to the Admins for their prompt attention and I aplaud them for the great work that they do. Andy
 

MikeMike

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cg said:
Some departments will license a low power pair and then use each frequency as a separate fireground channel. I cannot monitor those examples so I can't comment on those specific ones. I know Simsbury FD for example has 453.9625 and 458.9625 as two separate simplex channels.

chris

I can confirm that Guilford has the same arrangement and that is why you see the additional frequencies listed separately. I've heard them use the freqs during an event as an on-scene fireground channel.

-MikeMike
 
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