I have always experienced an arduous time listening to the Link on OKWIN to OKCPD
Only me?
Only me?
OKWIN Motorola Smartzone and OKCPD EDACS Provoice are in the same spectrum of frequency. EDACS is very strong. So strong it can desensitize your front end 'pulling' down on OKWIN weaker signals. I cannot count on my fingers, toes and maybe a few hairs on my head how many times I had to keep re-positioning my antenna while monitoring OKWIN until I cave in and switch Unitrunker to EDACS Provoice.
OKWIN and OKC Core and Wide Simulcast signals are very close in proximity to each other. What happens to the sound quality of an overloaded receiver? It suffers distortion. That's why it's called "simulcast distortion" when actually it's front end overload from powerful EDACS Provoice. The icing on the cake is that Provoice band-pass is wider than analogue OKWIN.
Load up HDSDR or SDR# on the 850mhz spectrum see the clutter and overload. If you have the hardware.
Looking at the waterfall:
The best way I can describe it is Provoice signals look like thick bright lines on the waterfall. Analogue are thinner and have a wavy like form to them. The OKC EDACS system has analogue as well. When they key up their wavy form is well pronounced and still thicker than OKWIN analogue because of signal strength.
Watch the noise floor on an EDACS signal key up along side of a OKWIN analogue signal.The noise floor drops as well as any signal therein next to it, adjacent from it causing imaging. An SDR may not hear the distortion but I can bet an analogue scanner will have distortion. SDR's and analogue radios treat signals different even though they are the same thing. Just processed differently. So I can say safely that as we all know it really is a dog eat dog world in the world of radio.
For Fun try my DSD+ setting for Provoice:
dsd.exe -fp -dr1 -dh1 -O NUL
or
dsd.exe -fp -dr4 -dh8 -O NUL
This seems to confirm what I have experienced with OKWIN in OKC. When I leave Norman say on Western and go north the closer to south OKC I get the more OKWIN's OKC site gets weak and noisy. I have a 10 DB step attenuator in line between the antenna and the scanner. With no attenuation signals around I-240 are weak. If I put 10 DB's of attenuation in line OKWIN's signals get better most of the time. OKC is a RF war zone with cell phone towers and EDACS and all there is a lot of RF floating around. In Norman even driving by within a block of a cell tower will cause Norman's OKWIN site get a little crackly unless I have the attenuation in line. I have a Uniden BC-796D and a 3 inch whip on the car.