internal noise

[tvining]

My PSR-600 generates noise at somewhere close to 348.6 (No matter what antenna, where it's located, I hit on this freq).

Problem being, that's a freq I actually need at work. Is there a way (other than attenuator) to increase the squelch sensitivity on the radio for that freq, so I only get what I want to hear?

Tony

 

[detroit780]

PSR 600 noise

Is the noise still there without an antenna? If so then it is internal noise, if not look for something nearby as a cause.

You may have done that already but your message didn't say. If it's external noise than you can try attenuating the signal if you're close enough to the frequency you want to listen to. I assume you turned up your squelch and the noise is still there.

Les

My PSR-600 generates noise at somewhere close to 348.6 (No matter what antenna, where it's located, I hit on this freq).

Problem being, that's a freq I actually need at work. Is there a way (other than attenuator) to increase the squelch sensitivity on the radio for that freq, so I only get what I want to hear?

Tony

 

[jim202]

My PSR-600 generates noise at somewhere close to 348.6 (No matter what antenna, where it's located, I hit on this freq).

Problem being, that's a freq I actually need at work. Is there a way (other than attenuator) to increase the squelch sensitivity on the radio for that freq, so I only get what I want to hear?

Tony

I would expect that what your hearing is a birdie from the VCO of the radio. Your not going to get rid of it.

You might take a look in the manual and see if they list all the birdie frequencies that the receiver may have.

 

[MaximumVerbosity]

My PSR-500 does the same thing. About S2, with or without an antenna attached.

 

[detroit780]

Internal noise

I just tried my PSR 500 on 348.6 MHZ AM and it has a signal of about 2 to 3 bars and breaks the squelch with or without an antenna. If I tighten the squelch to about 11 O'Clock I can silence the radio with or without the antenna.

Try adjusting the squelch. Make sure you don't have some outside interference too, make sure you aren't too close to a PC. Walk around with it to see if the signal strength lowers any. Squelch at 11 O'Clock isn't really that abnormal so if your radio is anything like mine you should have no trouble with receiving the station.

Les

My PSR-500 does the same thing. About S2, with or without an antenna attached.

 

[tvining]

Birdie

I knew there was a name for it, but didn't remember what it is! Thanks!

I've turned the squelch up all the way and set attenuator. Didn't know if the radio was smart enough to be able to re-tune the birdie or create a squelch break a little higher on a certain freq.

I might go to Rad Shack and see if they have a unit with LESS noise at that freq, since someone else indicated they were able to squelch it out.

TIger

 

[jim202]

I knew there was a name for it, but didn't remember what it is! Thanks!

I've turned the squelch up all the way and set attenuator. Didn't know if the radio was smart enough to be able to re-tune the birdie or create a squelch break a little higher on a certain freq.

I might go to Rad Shack and see if they have a unit with LESS noise at that freq, since someone else indicated they were able to squelch it out.

TIger

I guess you missed the context of my first message.

Any VCO or synthesized computer controlled radio will have spurs called birdies. The better the design,
the less the number and strength of the birdies that the radio will have.

If you look in the manual for most of the better radios, you will find listed the frequencies that the receiver
will have problems trying to receive. My 45 years of playing with radios tells me this is what your seeing
with your receiver. Not much you can do about it. Trying a different radio will probably have the same
results. Being that this is a scanner, the list of birdie frequencies might not be there.

 

[SOFA_KING]

If you can "squelch it out", and use a good antenna up high, then you will still be able to receive most of the traffic. The better antenna will overide the birdie so the reals signals are stronger.

No scanner is perfect. Luck of the draw. But these scanners are darn close!

 

[detroit780]

Birdie

If it is really a birdie and not outside interference the antenna will make no difference. A birdie will still interfere with the scanner with no antenna. That said a better or worse antenna will not help.

My PSR 500 is fine on that frequency with the squelch at 11 O'Clock with the stock antenna. However it still could be a birdie and mine is a few kHz off or his is a few kHz off.

If you can "squelch it out", and use a good antenna up high, then you will still be able to receive most of the traffic. The better antenna will overide the birdie so the reals signals are stronger.

No scanner is perfect. Luck of the draw. But these scanners are darn close!