MarkInTampa

If the drivers for the communication cable isn't working in Windows, it isn't going to work in Chirp.

This article should help on installing the driver... https://www.buytwowayradios.com/blog/2021/06/how-to-install-the-wouxun-programming-cable-and-driver.html

Are you connected to the right port for programming? The programming port is the same connector size as the microphone plug but on the SIDE of the radio, not on front.

Right-click on the installer/setup program, select "properties", check "Unblock" next to the security warning "This file came from another computer and might be blocked to help protect this computer", click "OK" then try installing again.

You can download the software from Buy Two Way Radios website: https://www.buytwowayradios.com/wouxun-kg-1000g-plus.html click on the downloads tab at the bottom of the description and then the KG-1000G-Plus-Programming-Software file. Within the downloaded file you will have two files, one has (64) at the end of it, the other one does not. The one with (64) at the end of it is for 64bit Windows, the other is 32bit. You only need one and most likely the 64bit version. The Wouxun software is not digitally signed from the manufacturer. This will more than likely trigger a "Windows protected your PC" if running Windows Defender antivirus with a "Unknown publisher" message and a option buttons to "Run anyway" or "Don't run" and click on "Run anyway". That should start the install process with another warning message that the software is not signed. If you are running under a restricted/limited account on Windows or using a 3rd party antivirus, chances are you won't be able to install the software because it's not signed. Try disabling your antivirus during install and right click on the install file and "run as administrator" to get it installed Good luck with the install - also remember the programming port is on the SIDE of the radio, not the front (same connectors). You would be surprised how many people I've talked to having trouble programming this radio that use the wrong port.

Sorry, thought you were talking about the N9TAX slim-jim that has a 6ft long or so pigtail. Here's a SWR plot of my KB9VBR GMRS J-Pole. Around 1.8 SWR on the low end of GMRS and around 1.3 SWR on the high end. I stopped using it awhile back, just didn't work as well as other antenna's I have.

Have you tried checking the SWR on the slim-jim without the additional coax? Just to rule out possible bad coax to the antenna. Here's a SWR sweep of my N9TAX GMRS slim-jim, around 1.3 SWR on both sides of GMRS

Go to MyGMRS.com and click on "REPEATERS" on the top of the page Click on "Advanced Search" Select the state you want in the middle field Select 50 on the "Rows per page:" option on the bottom of the page if you want more than 10 listed at a time

I'd suggest programming all 8 repeater channels for a tone of 141.3, the national travel tone and setup scan for all 8 channels. A good majority of public repeaters use this tone and is usually a good way to tell if a repeater is public or not. If you hear something that's not on 141.3 then scan for the tone if you want.

That doesn't surprise me at all. The RRDB listings for talkgroups are user gathered and updated are are known to be incorrect or way outdated. There are a couple of guys in my area that run banks of SDS200 scanners logging gigabytes of data a week and keep RRDB somewhat up to date for my area.

Detacom sites, frequencies, control channel and known talkgroups... https://www.radioreference.com/db/sid/8091

Since it appears they are using Nexedge 48, take a look at Bare Snow and Landscaping around 1000ft from the water tower. Just keep in mind that they are a Deltacom customer (DEC code 680) and Deltacom is about the only major player for NXDN in the area.

I still don't see how you are not receiving Deltacom's repeater of 462.531.25 on 462.531.880 (the center of your interference). I've got a DMR HT that allows me to to program 462.531.880 so I did. Tested as DMR simplex on 462.531.880 on low power with no antenna on the radio using SDR# with my RSP1B on a discone on both frequencies. It's so close a radio on ether frequency would work together. I'm not saying it's Deltacom but more likely something on 462.53125 since it's a standard offset. My Icom won't even let me program 462.531.880, it auto jumps to 462.531.25 but my MD-380 HT allows it for some reason.

If you have it narrowed down that close, you should be able to hear it with no antenna attached to the SDR if you are within 100-200ft of the transmitter. I run a program called Spektrum (cheesy spectrum analyzer for SDR's) to test my HT's or base for 2nd and 3rd harmonics at 5 watts with no antenna connected to the RSP1B at all to keep from overloading it. With no antenna connected about the only signal the SDR can receive is pretty much what is within 100ft it. If you have a radio (even analog) to bring along that can tune the the frequency at the same time just to monitor when it is transmitting or use it with no antenna and the SDR with one. A handheld frequency counter helps as well. We used to do fox hunts every weekend back in the mid 80's in the CB radio days, used to be quite good at winning it.

Do you actually see their transmission on the waterfall? You SHOULD and pretty much right where you are looking. Better yet, can you receive anything from them monitoring 462.53125? You are close enough you should hear it and how does it align with the interference? It should be almost on top of it.

You show the center as 462.53188, that a whole lot closer to the standard FCC spacing of 462.53125 than 462.5325. Close enough for margin of error on most radios. I know you talked to Deltacom who has a repeater less than 7 miles away on 462.53125, running trucked radios (probably Motorola's) and they said it wasn't them but what's the hurt in confirming it? They might have a lobe of the antenna pointing line of site that is bouncing off big metal object such as the water tower. You know what the traffic looks like, try parking under their tower confirm it is not them.

From ServiCar's website: RADIO COMMUNICATIONS - All of our School Buses are equipped with two-way radio communications with our dispatch center. Our system works off of three separate repeater stations on our private 900 MHz frequency through-out the Metro-Detroit area, providing us with communications through-out and beyond the tri-county area. They are also equipped with direct talk around for trips outside of the coverage area where communications between buses is needed.

Or Consumers Energy - tower is less than 1000ft away. Here's a Goggle street view of the tower from Nov 2021 - See if you see any shiny new antenna's.

If I had to guess they are running MotoTrbo GPS tracking on the radios. The GPS system can be programmed to poll the radios every 10 minutes or every 1 kilometer of movement. They are short bursts, around 600ms to 1 second. If a car is moving it sends a lot more traffic than if it doesn't.

I have first hand experience with the SDR being slightly off frequency. I picked up a DMR HT awhile back and the strongest DMR repeater I could pickup showed as 443.188 on the SDR and couldn't find it listed anywhere to program the HT. Also searched a bit and above the frequency online and couldn't find it anywhere. I mentioned it to one of the area guys I talk to on D-Star also is really into DMR and he found that the frequency was actually 443.1875 and he got the ID. He ran the ID and got one single hit on it on the internet - on one of the area club's webpage that also showed all the programming information and talk groups. It's not listed anywhere else. I learned not to put a lot of faith with the SDR being spot on.

The closest is actually 462.53125, same company (Deltacom) and licensed for trunk service. It's only .13 KHz down. Also 462.5325 isn't standard spacing, FCC only shows 2 experimental licenses in the the entire country and 100's licensed for 462.5312 I'd vote the oscillator is a bit off. With a SDR dongle using SDRSharp and Simple DMR decoder, I can decode DMR +/- 1KHz easy.

Try running the address on https://www.antennasearch.com/ . It maps out both registered and unregistered towers that the FCC doesn't show, might give you a bit more to go on.

Might check this location out around 6 miles away from where you have been checking (Life Time Fitness) ...

I spotted that as well but figured it was highly unlikely. 90 miles away from Oakland County (where the OP said he was) - also licensed for 2 watts.