Help: Strange MT2000 receive noise
Posted: Tue Sep 19, 2006 5:17 am
Hey Guys
I have a puzzling problem with my UHF MT-2000 and I’m looking for some guidance. I have several channels programmed (receive only) for local PD / FD. On one PD channel, I’m experiencing a constant “growling” when the radio stops in scan mode. It sounds almost as if two PL tones were beating against each other. I’m told this is related to the particular PL being used and the radio’s IF. What is more puzzling is the specific conditions that must exist for this problem to occur.
1. The radio must be in scan mode, if I manually select the channel, and disable scan mode, it’s fine.
2. The signal must be fairly strong. If I’m a few miles from that town, where any noise exists on signal, the problem does not occur.
3. If I select that channel as the priority channel, the problem does not occur – it only occurs when it’s just a normal channel in that scan list.
I have a DOS copy of the ZIF tool, which I was told, could shift the IF and solve this problem. However, in reading the “readme file” that comes with this tool, it does not mention anything about any PL or IF related noise.
One more point that might be important; the radio was programmed with the Windows version software. I’m told that once you read and write using Windows version, DOS versions no longer work. If that were true, would ZIF Tool (DOS) still work?
I have a puzzling problem with my UHF MT-2000 and I’m looking for some guidance. I have several channels programmed (receive only) for local PD / FD. On one PD channel, I’m experiencing a constant “growling” when the radio stops in scan mode. It sounds almost as if two PL tones were beating against each other. I’m told this is related to the particular PL being used and the radio’s IF. What is more puzzling is the specific conditions that must exist for this problem to occur.
1. The radio must be in scan mode, if I manually select the channel, and disable scan mode, it’s fine.
2. The signal must be fairly strong. If I’m a few miles from that town, where any noise exists on signal, the problem does not occur.
3. If I select that channel as the priority channel, the problem does not occur – it only occurs when it’s just a normal channel in that scan list.
I have a DOS copy of the ZIF tool, which I was told, could shift the IF and solve this problem. However, in reading the “readme file” that comes with this tool, it does not mention anything about any PL or IF related noise.
One more point that might be important; the radio was programmed with the Windows version software. I’m told that once you read and write using Windows version, DOS versions no longer work. If that were true, would ZIF Tool (DOS) still work?