Quote:
Originally Posted by wayne_h
I asked someone who would know. They said the scanner defaults to FM mode. NFM is only applicable to analog transmissions.
|
If this is true [and it could be], it isn't sensible. If the idea behind having selection of NFM and FM is to narrow the passband and ultimately cut out some noise, then it would be as effective for analog or digital narrowband transmissions. We already know it is effective for analog when we know the analog sig is narrowband.
If you're saying that "somebody who knows" guarantees that the scanner always uses FM rather than NFM mode for digital transmissions, that's a flaw that shouldn't be - IMO.
SOFA's findings would back up what I would expect - better performance on digital when set to NFM if you know for a fact that the transmitted signal is narrowband.
Placebo or not, I also program all suspected 11 / 8 Khz freqs as NFM. I'd like to think that the scanner is doing what it should be doing.
Mike