Another SDPD Reception Question

aaron1964

Member
Joined
Sep 14, 2007
Messages
76
Location
San Diego, California
During SDPD radio transmission it keeps cutting out. The small P25/DATA indicator keeps switching from P25 to DATA to LINK. The frequencies on the bottom keep switching from 771.49375 to 771.481250 to 771.5062590. It's a SDS100 scanner and I don't notice it, at least as much on my SDS 200. I was just wondering if my radio has a problem or if that's just the nature of the system.
 

Reconrider

Active Member
Joined
Sep 26, 2017
Messages
1,765
Location
EST
Thanks for the help. I never mess with any settings while using RCS. In fact I'm just a program and forget it kind of listener. So close call should be off and what about attenuator?
Close call is something to be used when you want to search for stuff only close and not "saved" already.
Think of it like stalking or hunting when in the area of a known signal.
I don't keep it on while searching because it does the 4s scan and I forget it's on and then I get annoyed.

Attenuator is to help with strong signals in an attempt to lower the strength - to be used only as needed if you get over modulation/power issues. leave in it's default setting
 

Elpablo

Member
Joined
Feb 26, 2003
Messages
86
Location
San Diego
As I have learned from people on this forum, the 700Mhz system is not nearly as strong as the 800Mhz system was. Therefore, our SDS radios will have more challenges picking up this system when we have topography or other signal blocking issues. It does seem that they could be some recent tweaking that has caused my reception of the 700 system to degrade further. I have noticed this on different radios. I remember some user said even their APX struggles in parts of the city to receive this system. For my SDS radios, the RCS comes in much clearer than the 700 system and I am in Clairemont.
 

tvengr

Well Known Member
Joined
Feb 10, 2019
Messages
9,753
Location
Baltimore County, MD
The frequencies on the bottom keep switching from 771.49375 to 771.481250 to 771.5062590.
Do you mean 769.50625 or 771.05625? The SDS100 receives very well on 700 MHz frequencies. I would leave the attenuator turned off unless the receiver overloads which most likely is not the case. I would suggest trying a Remtronix REM-820S antenna on the SDS100. It performs far better on 700 and 800 MHZ frequencies than the stock antenna.
 
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