To control the individual locomotives the DCC controller often known as the cab or throttle sends instructions to each locomotive via the rails. Each DCC-equipped locomotive is given an identifying address that is a number. So, for example, a Class 31 locomotive might carry the address , a Class DMU might be and a Class 57 diesel might be When a locomotive is bought it usually carries the default address The factory-installed settings in the decoder determine how that decoder controls the locomotive.
When the locomotive picks up the digital signal, the decoder converts the signal received into one or more actions. For example, the signal from the controller might command the locomotive to move faster or slower; to switch its lights on or off, to whistle or to hoot its horn. This takes place as the operator presses buttons or turns a knob on the controller.
The controller might operate other accessories too such as point motors, signals and working cranes. Some of them are down to personal choice, though DCC offers a more varied way to operate model trains.
On a simple small DCC layout, the power can be supplied to the track through just two wires at one connection without a need to isolate sections of track.
The double heading of trains and use of banking locomotives is also possible with DCC. Two trains can run into the same platform separately without the need for complex wiring. And then he can run them around and out of the depot one by one. DCC provides control over directional running lights of locomotives and multiple units, interior lighting effects, on board sound effects and smoke generators for steam locomotives.
Some of these are possible on DC locomotives but are much more familiar and accessible on DCC locomotives. DCC locomotive lights can be turned on and off at the operators instructions. MRC has had mixed success with their DCC decoders although I suspect this had more to do with poor quality control at the factory than in the decoder designs.
The MRC systems are easy to install with a plug-and-play architecture. Many people claim the MRC systems are not expandable but that is definitely NOT true as most everything is designed to be simply daisy chained together. MRC offers only full function throttles but these are user friendly and the displays are easy to read. Basic operating instructions are printed on the back of each throttle so even MRC novices can get up and running on their own.
The ergonomics of these throttles are not as good as on the NCE throttle but the MRC throttles are easier to understand and use than the Digitrax full function throttles. Both tethered and wireless versions of these throttles are available. I have had a couple take a trip or two to the concrete floor with no cosmetic or functional damage. Programming is very easy, and consisting locos is a breeze. There is no need to remove the batteries and the batteries can be recharged while still in the throttle.
Originally, MRC did not offer a computer interface but that is no longer true. MRC recently began offering a Wi-Fi box that allows simultaneous use of up to 8 wireless devices as throttles. I was planning to purchase two more wireless throttles for my own operating sessions until I discovered that the MRC W-Fi box is cheaper than a single MRC wireless throttle. The ability to connect eight more smart device throttles for less than the price of another MRC wireless throttle convinced me to install the Wi-Fi box.
Installation was a matter of simply plugging the Wi-Fi unit into one of the RJ45 jacks in my existing throttle bus. I was originally disappointed that the Prodigy system did not offer as much power as the Digitrax or NCE systems, but this has not proven to be a problem.
The original system has reliably powered a 10' by 19' double deck HO scale layout running several trains at a time including multiple Blue Box locos and other sound equipped locos. I did buy another booster to power one of the decks but have yet to install it. Only one of the other layouts I operate on is powered by an MRC Prodigy system but the owner has enjoyed system reliability similar to my own.
My only complaints with this system is with the throttles. First, the throttle encoders sometimes jump multiple speed steps when turned only slightly while other times large turns are needed to move only one or two speed steps.
The RJ45 plugs can sometimes lose full connection with the corresponding jacks requiring the tethered throttles to be unplugged and plugged back in to restore operation. The encoder knob location at the bottom of the throttle is also not as handy as the thumbwheel below the display of the NCE throttles. I have heard complaints regarding MRC's lack of customer service but, aside from a firmware update to get my early version Prodigy Advance not squared system to talk to the far newer wireless throttles I purchased only a couple of years ago, I have had no reason to contact customer service.
It did take a few weeks to send my command station in to MRC for the upgrade but it did happen within the quoted timeframe. I suspect that the MRC support system is so underdeveloped compared to the Digitrax support system simply because the MRC DCC systems do not require similar levels of technical support. It has proven to be reliable, easy to operate and very cost effective.
It might not have all the bells and whistles offered by the Digitrax or NCE systems but, with the exception of dispatcher controlled trackside signals, I haven't seen many of those bells and whistles used on the various layouts I have operated.
I also have yet to replace or abandon a single component of my MRC system since it was installed on my current layout in All in all, I've been very happy with my investment. I would want to also check out to see what systems are being used by others in your area. The best support group, next to a factory on the phone are those in your area. If there are clubs around you, see what they are using and why.
Price was not the issue as I knew I wanted wireless. I chose NCE for the ease of use. I've also tried the Digitrax at a friend where you can control 2 engines from the one cab without recalling up the other engine. Also, shop around for the best price, don't go by MSRP. There are a number of reliable places to buy from, both online and a LHS. Hornblower has given you a very thorough review of the three main systems so I needn't repeat what he said, however I will put my vote behind NCE.
I far prefer the NCE system. It is intuitive and the throttles are easy to understand and use. The Digitrax throttles are very poorly designed and they require that you keep a lot more information in your head than the NCE system does. Of course, over time anyone can learn to operate the Digitrax throttles comfortably, but NCE has a much smaller learning curve. Maybe less. I'm just a dude with a bad back having a lot of fun with model trains, and finally building a layout!
I have a MRC prodigy express. I like it alot. Only drawback is access to only 15 functions. I plan on upgrading to the prodigy avanced controler for access to more functions. Even after having to purchase the advance hand set, it comes in at a lower price point than the other 'starter' systems.
I am sure you will hear more information from people with alot more experience than me. Just offering my opinion on the unit I know. Try all the throttles to see which one you like best. Throttles are NOT interchangeable. I had a chance to try the Digitrax starter at a local hobby shop also but did not not like the hand controller.
I'd also suggest you check out the Roco "z21" system. Can be used with wired controllers or via wifi comes with its own router with iPhones, Android phones, iPads, or Android tablets. Even with a computer running the software under emulation. The good news is that, other than the underperforming "entry-level" systems, every DCC system is very good and you will be happy with it. I have to second Roco's z Will you have a need to plug in a handset at various places around the layout or do you prefer a fixed console type of controller.
Is wireless a requirement. Will you need to connect to a PC either for controller firmware updates or to use layout operational software. Keep expanding your tick list then when you get the opportunity find a dealer who has a selection of kit to try in hand. One of their main selling points is scalability the "Nothing Wasted" growth plan. The basic unit is a hand-held controller on a wire, but I think there is a wireless option to upgrade to.
I have no experience of other systems, but have nothing bad to say about the NCE one. Old N layout Loco control by either the main unit or one of the handsets. All can control different loco's at the same time. It also has a separate programming track output. A fully functioning and expandable DCC controller. Thanks End2end. Post by Geordie » Tue Apr 28, pm Thanks for all the replies guys. It is tough at the minute not being able to get anywhere.
I do want something I can walk around with for sure. Are all makes and models compatible with dcc decoders? For example, if I were to go for a Lenz controller, would i need to have Lenz decoders in locos etc? Sadly I don't remember the part number. The actual choice of decoder will roughly depend on what you need it to do, how powerful you need it to be and the loco's socket you wish to install it into.
Just for example No light's in the loco? Older DC loco with no decoder socket? OR buy an 8 pin socket and hard wire that in then plug in a decoder with no wires.
Full on sound and lights equipped loco - multi-function decoder. Hope it helps. Last edited by End2end on Tue Apr 28, pm, edited 2 times in total. I thought it was the case but just wanted to be sure! Post by End2end » Tue Apr 28, pm I fleshed out my answer. Have another read now I've edited it. It might make more sense. Both offer full functionality.
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