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dmr [2019/12/09 13:55] kd6kpc [What is a C-Bridge?] |
dmr [2020/12/06 17:35] kd6kpc [BrandMeister.info] |
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====== DMR ====== | ====== DMR ====== | ||
- | ===== Overview | + | ===== How do I get on the air? ===== |
+ | DMR is a digital mode, so owning a DMR radio is required. Before you can use the radio on a repeater, you must obtain a DMR ID (see below). | ||
- | ==== DMR Benefits ==== | + | DMR radios typically cannot be programmed for DMR use from the front panel. You will need radio programming software to create a code plug. A code plug is then uploaded to the radio. See below for the different parameters required to create a code plug. |
===== What is a DMR ID? ===== | ===== What is a DMR ID? ===== | ||
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===== What is a Color Code? ===== | ===== What is a Color Code? ===== | ||
- | In a MOTOTRBO radio or repeater, there is a color code field which allows the selection of one of 15 color codes. A radio which has been programmed with color code 1 will not be able to transmit on a repeater | + | A color code for a DMR repeater is akin to a PL tone for an analog repeater. There 15 color codes (0-15). A radio must be programmed with the correct |
- | Color code is useful because it can prevent radios from one site or system mistakenly roaming to another site or system which uses the same frequencies. Although there is activity from the neighboring system, the radio will ignore all transmissions from the other system because it has a different color code. | ||
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- | This is also useful for telecommunication regulators who have to allocate the same frequency to two DMR licensees in the same region. The regulator simply has to specify a color code in the license conditions - much like PL/DPL was used in analogue as a guard tone. | ||
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- | There is a limitation of course, if two geographically adjacent radio systems use the same frequencies, | ||
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===== What is a Talkgroup? ===== | ===== What is a Talkgroup? ===== | ||
+ | DMR repeaters and networks incorporate a system of “talk groups.” These are simply an ID code transmitted by the radio accepted by the repeater and retransmitted to other DMR radios on the same channel, and potentially across the Internet to other linked systems. This ID code is a simple number like “310.” In the DMR world, 310 has been given the moniker of “Tac-310.” Any radio set to receive Tac-310 on that repeater’s frequency channel will open the speaker and allow the transmission to pass to the end-user. Any other radio not monitoring Tac-310 will remain silent. These talk groups are programmed into radios like channels. A repeater could support multiple talk groups. The end-user radio would have to have each of these talk groups programmed into separate memory channels to utilize them. Memory slot one could be Tac-310, memory two could be Tac-311, and memory three could be Tac-312, for example. The repeater’s frequency and access codes could all be the same, except the talk group code. It is important to know which time slot the talk group is on, as that must match. RepeaterBook tracks the talk groups available to a repeater. | ||
+ | ===== What is a C-Bridge? ===== | ||
+ | There are technically two different uses for a c-bridge. The first one is at the local level to cluster, connect up to 15 repeaters into a hub. RepeaterBook refers to these as IPSC networks. | ||
- | ===== What is a C-Bridge? ===== | + | The second use to connect clusters |
- | The C-Bridge is the secret | + | |
===== What is a Code Plug? ===== | ===== What is a Code Plug? ===== | ||
- | DMR Radios are configured using “Code Plugs”, which define the repeaters, talk groups, and other settings | + | DMR Radios are configured using “Code Plugs,” which define the repeaters, talk groups, and other radio settings to communicate. Every manufacturer uses its own format, which may or may not be compatible with similar models. Though this programming |
===== Who is DMR-MARC? ===== | ===== Who is DMR-MARC? ===== | ||
+ | MARC stands for Motorola Amateur Radio Club Worldwide Network. It is one of the original DMR network coordinators and is still to this day extremely popular and reliable. | ||
===== Who is BrandMeister ===== | ===== Who is BrandMeister ===== | ||
+ | The Brandmeister Network was born from several worldwide hams and software engineers who joined together to create a digital repeater network consisting of master servers and peer repeaters worldwide. | ||
- | === Related Links === | ||
- | * [[https:// | ||
- | |||
- | ==== DMR on RepeaterBook ==== | ||
- | Repeaterbook.com understands that DMR is a digital format that operates at a bandwidth of 12.5 kHz. DMR can control access to the repeater with a color code. It is much like CTCSS, but the signal is sent outside of the digital voice frame. | ||
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- | DMR incorporates talk groups and the available talk groups are tracked by Repeaterbook.com. They can belong to large networks, which is also tracked by Repeaterbook.com. | ||
- | ==== DMR APIs on RepeaterBook ==== | + | ===== DMR APIs on RepeaterBook |
Repeaterbook.com utilizes two APIs to supplement repeater data. | Repeaterbook.com utilizes two APIs to supplement repeater data. | ||
- | === radioed.net === | + | ==== radioid.net ==== |
- | In order to use DMR through Internet Protocol Site Connect (IPSC) servers, each DMR appliance (radio, repeater, hot spot, etc.) needs to have a DMR ID. For the amateur radio service, these can be obtained through [[https:// | + | To use DMR through Internet Protocol Site Connect (IPSC) servers, each DMR appliance (radio, repeater, hot spot, etc.) needs to have a DMR ID. For the amateur radio service, these can be obtained through [[https:// |
- | - Repeaterbook | + | - RepeaterBook |
- | - Repeaterbook | + | - RepeaterBook |
- | Radioid.net rules require a registrant to use their own call sign and not the repeaters | + | Radioid.net rules require a registrant to use their own call sign and not the repeater' |
- | The API is queried by Repeaterbook | + | The API is queried by RepeaterBook |
- | If there is incorrect data on Repeaterbook which would include | + | If there is incorrect data on RepeaterBook, |
- | === BrandMeister.info === | + | ==== BrandMeister.info |
- | BrandMeister also hosts the [[https:// | + | BrandMeister also hosts the [[https:// |
- | Repeater managers can change the display of the static talkgroups by updating their settings on Brandmeister.network. Repeater owners can also request an admin to update the Repeaterbook | + | Repeater managers can change the display of the static talkgroups by updating their settings on Brandmeister.network. Repeater owners can also request an admin to update the RepeaterBook |
===== Other Resources ===== | ===== Other Resources ===== | ||
+ | * [[https:// | ||
* [[http:// | * [[http:// | ||
* [[https:// | * [[https:// |