Maybe, but that's not a particularly safe practice.
Anne Arundel Radio System Down?
- Thread starter ThePhotoGuy
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I was reviewing some FCC records and came across the RINS channels licensed to the county (that I always forget about.) I wonder if they were used in the outage since it doesn't appear that CMARC or the 800 TACs were used for police operations. (I still don't understand why CMARC wasn't utilized, at least in north county.)
I did notice after the outage, AA Radio Personnel were doing coverage testing on FiRST/CMARC in South County. CMARC did not get good coverage. It seemed like FiRST did good but in some of the lower parts of the county they were only able to get FiRST on mobile.
Not shocked that CMARC didn't work well in south county - it's barely acceptable where I live in Annapolis. I can see FIRST being marginal in some areas of south county as well, but then again full coverage won't be obtained until Calvert and PG counties are built out. The county's own system performs poorly enough that they use PG TGs to cover it, and will use a PG tower to host a site for the new system.
Probably Quantar power amplifiers doing what Quantar PAs do best ... x_x
I am having a problem receiving voice on system channel 216 / 856.4125 at my location. Every transmission on this system channel is hash - no recognizable voice, no particular TG, either analog or digital. Is anyone else seeing this?
OK, now I'm believing this is interference from another system. I put up the freq in SDR#, and watched the channel go active with a transmission, but the was no activity on the channel from the AA County system. The transmission I'm hearing sounds like a digital modulation of some kind.
OK, I've narrowed down the interference, and it's not from another system. What is happening at my location is when 856.4125 is granted, it blows out the control channel (854.4125) on my AirSpy R2 when tuned by Unitrunker 2. Consequently, Unitrunker loses its mind. I tested this by monitoring the audio on 856.4125 using SDR#, and watching the scope and channel activity on UT2 and the waterfall on SDR#. You can plainly see the cch being lost when transmissions occur on 856.4125. When the transmission is analog, you can ID it as AACo traffic. Still investigating whether this is just an UT2 / AirSpy issue, or if it is affecting other radios as well.
Very odd one indeed! For what it is worth I'm listening to AACo using UT2 and a pair of RTL dongles and have not seen that. I'm on 2.1.0.15. I think they recently pushed .18? which has a bunch of AirSpy changes, could that be involved?
Possibly. I'm editing a video of the behavior that I'll post here and to the Unitrunker group. But I've had the "interference" at my location for a while, prior to the recent changes in the software. The "interference" shows up in the scope of the UT Radio window. It is odd.
tvengr
Well Known Member
I'm receiving AA Co OK in northern Baltimore Co using a SDS200.
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