RC3 has had squelch since day one! It's in settings under "Timeline". Car ID squelch is new to RC4 I think.

I have not talked to the software tech.. Due to the fact that they will only help me if I buy the latest upgrade. Which is way out of the clubs budget right now.. We are using a usb to serial connector. 64bit windows 7. The same serial to usb converter we use when we put the older box on. Are you sure i am going the wrong way with the squelch? Maybe I did read the manual wrong.

in the rc4 under the timeline function there is a squelch adjustment..

From the Manual

- Squelch:
With the squelch setting you can suppress weak transponder signals. This is sometimes useful if participants are walking near the loop or the coaxial cable and are picked up accidently. E.g. if the squelch setting is set to 60, all transponders with received strength below 60 will be ignored.

Meaning the weaker signals of transponders further away from the loop will be ignored. I have found the RC3/4 decoder is way more sensitive than the RC2. So you may have to re-think your loop location. You need a minimum of 3 or 4 feet from adjoining lanes...... you may have cars in other lanes picking up under the minimum lap time.

I talked to my laps on the phone about this issue (back in December). They told me to start at 50 and go up if needed. Since we have house transponders, they produce a much higher signal than pt's. So we started at 50. I have it set to 60 currently, and this allows me to place the loop about one foot away from adjacent lanes. That way people wont get counted early during a race. My loop is also only 1 ft wide. This also condenses the field in which the transponders are being picked up. It works perfect and have had no issues.

Ok, so i will try that.. I appreciate the help!

Any ideas why it ends the mains early? do you think it is doing it cause the squelch was so low? Like i said, i know the box shouldnt have anything to do with it.. But i have tried it on 3 different computers.. When i use the old box it works fine.. Same Usb to serial and loop and all.. It works fine.. Any ideas?

I would get with RC Scoring Pro on that. He is also a dealer and may tell you why it is doing that. The other thing, I would recommend using ethernet for connection to the decoder (if your rc scoring pro supports it). Should be the cable that came with the decoder (it is a crossover cable). The RC4 decoder box is sending more info, and the software is not setup to read the software threw the serial port or ethernet port, you will have issues. RC Scoring Pro may tell you, you need to upgrade the software to support RC4, not sure on that...
Lastly, some of the usb to serial adapters do not work correctly, and if the drivers are the newest, it may not work right. I have a serial to usb, and if I used the drivers from 2008, works flawless, but if I updated the drivers to 2012, it wouldnt work... Make sure you try all the drivers available for the adapter you have.

All of this change is a pain, but it is good to have forums like this to help each other out.

I have had a similar problem with mains ending early. When you start your race software the decoder and software do a "handshake". The decoder says” I’m ready to send data and the software says, "I’m listening BTW, the time is XX:XX.xxx. Now the decoder and computer are in synch.

In my case there was a problem with the computers time, it was faster than the decoders time. While the qualifiers are run with "staggered start", where cars are on their own clock, were not affected. The mains run on one clock. My computer was gaining about 20 minutes a day. Over the course of the race day there was around 5 minutes difference.

Long story short, the software gets the time from the decoder every lap for every transponder. Software sees the 5 minute difference in time and thinks the 5 minute race is done. Sometimes it would end the race after a couple of minutes depending on the time difference. This only happened on this one laptop, about drove me nuts trying to fix. Finally found out it was caused by the Intel Pro Set wireless software installed on it! Un-installed that wireless software and working fine since!

We had issues when we used a network cable hookup. Switched back to old serial connector on the decoder AND computer and no more issues. Maybe install and old serial card and ditch the USB.

Our local track personnel talked to some folks at MyLaps the other day on the phone and they're claiming that the plan is to have the entire system limited to the 3-wire MyLaps RC4 transponders ONLY by 2017. House Transponders, AMBRC Personals, and even the RC4 Hybrid apparently are going to be phased out over time and the compatibility will be eliminated via automatic software updates when you connect the box to upload peoples' laps online.

Your race software has to support the TCPIP (LAN) protocol to use the network cable.

Hi, we've the new 4 on our track. How do you upgrade firmare? Thanks

If you just got the RC4 decoder chances are it has the updated firmware. In settings you can see the firmware, 4.3 is the lastest.

If not you need to contact MyLaps with the serial number of the decoder. Go to this link: Support They will send you a e-mail with the update attached.

Ok i here tracks are using MRT TRANSPONDERS without any problems and other tracks they don't work with the MRT. Tracks that have used the RC4 DECODER for awhile now do the MRT PERSONALS WORK.
I wish mrt made a decoder mylaps is really killing the hobby

they count sometimes.

At our local track in Torres Vedras, Portugal,(Indoor RC Oeste, 1/10TT Carpet) we just upgraded to the new decoder box. The MRT PTX transponders don't work. 2 pilots were using them and in 10 minutes they just counted once.
We also have the old track rechargeable transponders and they work just fine with the new box. Also the RC4 hybrid work whit no problem, never missing a lap. We haven't tried yet the new RC4(3 wires), (no pilot as them yet).
I'm using the Ethernet connection on a laptop with Sparc and everything works just fine.
We also use the program Laps Free (this one with serial cable whit USB converter).
Not fully tested yet but i did a small test ant it seams that works OK.