Tips for using DMR

  • Each radio on a DMR system must have a unique Radio ID. RMHAM recommends (although doesn’t require) using a radio ID freely obtained from DMR-MARC (https://www.dmr-marc.net/cgi-bin/trbo-database/userreg.cgi). Until your DMR-MARC Radio ID is obtained, you may use a random Radio ID (we suggest you use at least 5 digits so it’s less likely to interfere with DMR systems).  We suggest that you refrain from using the DMR-MARC systems until your ID has been obtained and programmed into your radio, but it’s perfectly acceptable to use your random ID on the RMHAM system.  These numbers are not required to be legal in the eyes of the FCC, only to help identify your station on the display radios!

  • We suggest you spend a little time on the Rocky Mountain Ham Radio DMR page (http://www.rmham.org/wordpress/dmr-radio-site-information) and learn the system. For example, you will notice that the “Rocky Mountain Wide” talk group links 23 or more repeaters around Colorado, New Mexico, and Wyoming, while the individual “regional” talk groups (Northern, Central, Southern, Eastern, Southeastern) link repeaters in a smaller, “localized” area. A number of DMR users are available to help you get further understanding, including those listed on the RMHR Sample Codeplug Page.  Also note that we hold an on-air DMR tech net on Rocky Mountain Wide.  See the calendar for date and time.

  • It is important to keep in mind that there are several DMR repeater networks (RMHAM, BRANDMEISTER, DMR-MARC, DCI etc.) with multiple talk groups each, and most Hams scan multiple networks. When initiating a conversation (calling CQ) on a DMR network, it helps a great deal to indicate which talk group you are initiating your call on. For example, “K0RM on South” or “K0RM on Rocky Mountain Wide”. This will allow scanning Hams to respond on the appropriate talk group.

  • If you plan on using any talk group, or repeater combination for an event, please contact RMHAM and schedule the time to make sure you’re not double booked.  This will ensure that all that wish to use the system are not interrupting a schedule event.  The system is there for you to use, but it’s for everyone.

  • A note special note on “Rocky Mountain Wide” QSOs.  Our network is huge.  If you’re on Rocky Mountain Wide, you’re lighting up 25 or more repeaters in three states.  Consider “Rocky Mountain Wide” to be a calling frequency, then move your call off to your regional network, North/Central/South/East/Southeast if possible.  If you’re calling your buddy down the street to see if he’s around for a QSO, that might be better done on a regional group or local repeater rather than Rocky Mountain Wide.  If you are unable to use the same network and Rocky Mountain Wide is your only path, make sure you leave plenty of time between transmissions for your fellow users to break in!

  • Texting and file transfers are not recommended on our network.  Texting is possible, but does take network overhead time on all of the repeaters you’re connected to and can be disruptive to other users so we discourage it.  We do not allow texting or radio data traffic to travel across our backbone and we do stop it at our C-BRIDGE.  While this can be allowed for emergencies, it is very network and air-time intensive and must be curtailed.  If you wish to play with these features, we encourage you to do this on simplex frequencies.

  • Utilize our sample codeplugs for your radios as much as possible.  It will solve a lot of consternation when things go wrong!

  • Rocky Mountain Ham Radio’s own network is separate from the other networks (DMR-MARC, DCI, BRANDMEISTER) and the traffic from those networks is not carried on repeaters with Rocky Mountain Ham talkgroups.  (RM WIDE, North, South, Central)  These are separate repeaters and are not located everywhere!  If you want a different network in your area, get a team together and make it happen.  We will gladly help you with technical information or support.  Just ask!