Close Call

[GTO_04]

The drawback of Close Call or looking at the input frequencies on a trunked radio system is that it will let you know when anyone on the system near you. Depending on your local situation, you may end up getting someone other than an officer in most cases like public works or a bus passing by.

This method of monitoring also uses the assumption that the nearby officer is talking up a storm, which is unlikely unless something major is happening. If they are using that much airtime, then you will probably hear the sirens before you find out by monitoring the input. It would probably be more effective to use a radar detector.

I am thinking the public safety channels are going to be more active than public works or buses. But yeah, you are going to pick up any users on the system.

Did you try entering each input frequency as a single channel "P25 One Frequency" system? That should help and let you filter out radio traffic by TGID.

GTO_04

 

[4436time]

I get hits all the time, I just don't pay attention since I usually hear the plane flying over when it happens. The CC aircraft and 800mhz bands are enabled and I should enable the rest to see what else might be happening around me.

I live about a mile from the main gate at Wright-Patterson AFB right in line with main runways and those big C-130s come pretty darn close sometimes and I have CC enabled (airband) on my BC125AT but no hits from overhead aircraft - ever.

 

[eyes00only]

Don't know if this fits in this thread but the strongest hits I get with Close Call are railroad freqs. in the 160 range.
I live about a mile from a switching yard.

 

[bravo14]

If you're using close call for DMR it won't detect it. I've tried that at some places.

 

[jonwienke]

If you're using close call for DMR it won't detect it. I've tried that at some places.

It depends. Single-timeslot simplex DMR will not be detected because they are not a continuous transmission. But dual-slot transmissions from a repeater will be picked up, because they are continuous.

 

[bravo14]

It depends. Single-timeslot simplex DMR will not be detected because they are not a continuous transmission. But dual-slot transmissions from a repeater will be picked up, because they are continuous.

I didn't think of that. I have trouble picking the local schools here expect the high schools since they are on a repeater using slot 2. The other schools use slot 1 but no repeaters.

 

[TailGator911]

Ahhh ok, that explains the hits n' misses with CC for DMR in the various hotels I stay in. DMR is getting to be very popular in hotel/motel coms for security and maintenance radios and I am not getting some results when I use CC in the hotels. Nothing like it used to be when they all used dot radios. I have much better results with search parameters in uhf. That answers that - thanks

 

[poltergeisty]

Isn't there a mode that makes you listen to the strongest signal in the spectrum? I'm almost sure there was one in the scanner plugin.

I don't know. The scanner plug-in for SDR# just scans a frequency range you set.

Ahhh ok, that explains the hits n' misses with CC for DMR in the various hotels I stay in. DMR is getting to be very popular in hotel/motel coms for security and maintenance radios and I am not getting some results when I use CC in the hotels. Nothing like it used to be when they all used dot radios. I have much better results with search parameters in uhf. That answers that - thanks

I read in the Nevada forum yesterday that someone mentioned a lot of hotels/casinos are using DMR in Vegas now.