If 2 scanners are turned on side by side both with interior , can they interfere with each others receptions?
If 2 scanners are turned on side by side both with interior , can they interfere with each others receptions?
Not true. Scanners use internal frequency oscillators, and they CAN interfere with one another.
It is possible for the Oscillator to create a 1st,2nd 3rd and 4th Harmonic that could interfere with another scanner.........Not true. Scanners use internal frequency oscillators, and they CAN interfere with one another. I've experienced this many times. For example, if you try to monitor a frequency of X where X is the frequency of another scanner plus or minus the IF frequency (depending if it's high or low injection), you will hear a dead carrier because that is the frequency generated in the second scanner.
I used to use that method to determine what others were scanning when I knew the model number of the scanner they were using. These signals can be heard for up to a mile or more. That was using crystal scanners, and scanners have since become much more RF emission friendly, but the same issue still exists.
Similarly, a few years ago I was mobile and had two GPSs next to each other. Neither was working. I suspected similar interference, and I separated them. They both started working fine. They required 3 feet of separation to eliminate the mutual interference.
Of course, now that you have trunked systems, CTCSS, CDCSS, and NAC, those mask the issues making them less noticeable compared to scanner carrier-only. Note that I said MASK. They do nothing to eliminate the interference. They simply hide it. If you tried to monitor "frequency X" as above, you would still have a competing signal to the one you want to receive.
It is possible for the Oscillator to create a 1st,2nd 3rd and 4th Harmonic that could interfere with another scanner.........
Turn the HP1 off when they're close. See if the 436 still does itInteresting topic.....so I am sitting here listening to my 436 and hp1.
Hp1 and 436 are right next to each other.Hp1 on adapter power 436 on usb power and 800mhz RS rubber duck ant. Signal on local p25 system breaking up occasionally on 436, move the hp1 a foot away break up stops. Move it back 436 starts to break up occasionally. The hp1 must be producing some decent interference to cause this.
Did this test numerous times with same result.
Tim