Lansing, IL - PD has a tac channel on 155.040 (as listed in the RR database). When they go to that channel, I hear one of the automated weather channels with the PD at a much lower level underneath. I'm using a Uniden BC355N. I would appreciate any tips on how to filter out / separate the two signals.
Tactical channel question
- Thread starter mgoday
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Lansing freqy 155.04 has a PL of 156.7, I don't think that model scanner accepts PL's if it does using the PL would help.....
wtp
Member
some questions
it could be intermod
is there a way to move the radio/antenna around to see if it changes?
does it ever change like sometimes it interferes and sometimes not?
different antenna even a paperclip to see what happens?
how far away are the transmitters from you?
it could be intermod
is there a way to move the radio/antenna around to see if it changes?
does it ever change like sometimes it interferes and sometimes not?
different antenna even a paperclip to see what happens?
how far away are the transmitters from you?
wtp: The NOAA transmitter is in Lockport, IL - 37 miles away, Lansing IL is about 6 miles away. I doubt it's intermod, I'm only using the telescoping antenna that came with the unit.
RoninJoliet: I should have thought about the PL, thanks.
RoninJoliet: I should have thought about the PL, thanks.
wtp
Member
i went looking
the 355n does not have pl
and to add to the question it seems it is triple conversion (cuts intermod)
so i am at a loss as to what it is
the 355n does not have pl
and to add to the question it seems it is triple conversion (cuts intermod)
so i am at a loss as to what it is
Going to try another way
My best guess right now is that the NOAA audio is being used to mask the PD audio. I am going to dig out my old Azden 2 meter mobile, it will receive into the public service band. I'll set the PL and see if there is any difference, though I expect it won't be that easy. Lansing used to use a tone injection system for their tac channel, but it was easy to "decode" with a side tone injected into the audio (every cop in town had an add-on box for their scanner), so I expect some kind of audio filtering based on the NOAA audio may be needed.
My best guess right now is that the NOAA audio is being used to mask the PD audio. I am going to dig out my old Azden 2 meter mobile, it will receive into the public service band. I'll set the PL and see if there is any difference, though I expect it won't be that easy. Lansing used to use a tone injection system for their tac channel, but it was easy to "decode" with a side tone injected into the audio (every cop in town had an add-on box for their scanner), so I expect some kind of audio filtering based on the NOAA audio may be needed.
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