NOAA Broadcast on 923.8 NFM

[frankgh]

Hi Folks,

Background:
Out of the blue my wife buys me a BCT15X for Christmas. I have never owned a scanner before and the learning curve is near vertical. A few days ago I find proscan and it's bandscope function.

Question:
Why am I getting NOAA from Pensacola that is normally on 162.4 on 923.8 NFM? Did someone modify an old phone as a repeater?

Just Curious

Frank Out

 

[Thunderknight]

It could be a 33cm ham repeater - hams can retransmit NOAA weather radio. Although they are not supposed to do it on a full time basis.

It could be a "studio" to transmitter type link. I see there is a NWS office in Mobile....they may be using 900 MHz to link their office to the Pensacola transmitter.

 

[Myles]

It's scanner math.
Scanners use an IF or intermediate frequency in the inner workings of the radio to receive signals.
In this case, the BCT15X has one IF that is 380.7 MHz.
BCT15XSpecs < UnidenMan4 < TWiki
162.4MHz + 2*380.7MHz = 923.8 MHz
You probably have a strong signal on 162.400 MHz.
This used to be a big problem when scanners used low frequency IFs since you would pick up false signals all over the place. Thankfully they use higher IFs and it is not as big of a problem.