Central Idaho Amateur
Radio Club
     
N7IBC Member Affiliated Repeater
N7IBC UHF/70cm DMR Repeater

Table Of Contents
Introduction

The N7IBC UHF/70cm repeater is a low level open repeater, located at McCall, Idaho (e.g. 100 miles due north of Boise) and can be linked to the KC7MCC CIARC repeater via the 33cm Link Backbone under DTMF command by a control-operator. The N7IBC repeater provides coverage along the highway 55 cooridor, from Little Donner to north of McCall, and into portions of Adams County.

It is absolutely essential that all operators become familiar with the DMR operating guidelines. These can be found on the Idaho ARES web-site by clicking here, or on this (i.e. CIARC) web-site by clicking here. These guidelines provide a context regarding the shared resource nature of DMR and wide-area networked repeater operation, and are structured to make the operating experience more enjoyable for all operators.

Operators who do not comply with the above mentioned guidelines may find themselves subject to FCC part 97.205(e) restrictions.


Operators hearing stations that do not adhere to the DMR operating guidelines are encouraged to not respond to operators that operate in violation of the guidelines in an effort to discourage poor operating practices.


N7IBC UHF/70cm Repeater Access Parameters
Call
Sign
DMR-MARC ID QTH Input
MHz
Output
MHz
MODE Timeout
Timer
Minutes
N7IBC 311603 McCall 449.125 444.125 DMR 10

The N7IBC Repeater has migrated from analog FM to Digital Mobile Radio (DMR) on 20 February 2017. This was accomplished with the purchase and installation of a Hytera RD-982 400-470 MHz UHF/70cm repeater from White Cloud Communications. Users with a standard analog FM transceiver will no longer be able to access the N7IBC repeater. The primary reasons for this change are to increase the usable coverage foot-print through improved signal quality, attain seamless wide area networking capability (i.e. global, national, regional, and local coverage through the BrandMeister network), with a focus on statewide ARES communications capabilities.


[Hytera RD-982 Front]


Why Hytera Was Chosen: A number of people have asked why Hytera was chosen over Motorola. Since Motorola customer programming software is a subscription service, there would be an on-going charge simply to be able to maintain programming of the repeater. No such subscription charge exists with Hytera. Pirating software is not an option, legally or ethically. Motorola may very well be a viable choice for other repeater owners / operators if the subscription fee is not objectionable to them, or if they have a business relationship with Motorola that negates the cost of the subscription. Given a very balanced comparison of Motorola and Hytera repeater specifications, and Hytera's more favorable retail pricing when compared to Motorola, Hytera simply made the most economic sense.


If your station is not DMR equipped, and you attempt to listen directly to the N7IBC repeater on 444.125 MHz, you will only hear digital communications, which will sound like noise. It is recommended that stations equipped with standard analog FM capability use either the No Business Mt. or Brundage Mt. CIARC analog 2-meter FM repeaters.


DMR Code Plug Parameters

For those wishing to add the N7IBC UHF/70cm DMR Repeater to their DMR code-plug, the following programming parameters should be employed:


N7IBC UHF/70cm DMR Code-Plug Parameters
CHANNEL CHANNEL NAME TALK GROUP TYPE TIME-SLOT TALK-GROUP COLOR CODE TIME OUT
1 BM ID 3116 DYNAMIC 1 3116 1 180
2 BM MT 3130 DYNAMIC 1 3130 1 180
3 BM NV 3132 DYNAMIC 1 3132 1 180
4 BM OR 3141 DYNAMIC 1 3141 1 180
5 BM TX 3148 DYNAMIC 1 3148 1 180
6 BM UT 3149 DYNAMIC 1 3149 1 180
7 BM WA 3153 DYNAMIC 1 3153 1 180
8 BM ZONE 7 DYNAMIC 1 31097 1 180
9 BM TAC 5 DYNAMIC 1 8955 1 180
10 BM SNARS 31328 DYNAMIC 1 31328 1 180
11 BM SOCAL 31066 DYNAMIC 1 31066 1 180
12 BM NORCAL 31068 DYNAMIC 1 31068 1 180
13 TS1 NET STATIC 1 8 1 180
14 TS2 NET STATIC 2 2 1 180
15 BM ARES-ID 31160 STATIC 2 31160 1 180
16 BM EMCOM 9911 STATIC 2 9911 1 180

If you are constructing a code-plug that supports the KC7MCC, N7IBC and W7CIA DMR repeaters, it is recommended interleaving channels for each of the repeaters as contiguous channels of a like talk-group to promote driving safety. For example, if the TS1 NET for the KC7MCC DMR repeater is adjacent to the channel for the N7IBC DMR repeater, and then the W7CIA DMR repeater, you will not need to change zones when mobile operation requires you to move from one repeater to the next. You will only need to change channels.

Dynamic talk-groups (i.e. push-to-talk talk-groups), residing on time-slot 1, are available to stations directly using the N7IBC DMR repeater with DMR Tier II equipment, or by stations using analog repeaters that are on the CIARC 33cm link back-bone (when enabled). While stations on DMR will have the ability to activate a specfic dynamic talk-group, users from the CIARC link back-bone do not have the ability to select a talk-group and can only use the talk-group that is currently activated.

Calls initiated from other repeaters that are on the BrandMeister network, and appearing as a dynamic talk-group on time-slot 1, will be heard on the CIARC repeater network whenever the 33cm link is enabled. Any traffic on the CIARC repeater network will be heard on the active dynamic talk-group on time-slot 1. This means that your traffic may be heard on other repeaters in Idaho (and other regions, states, countries). The 33cm link will be disabled during the monthly CIARC NET, and at other times at the discretion of the control operator(s).

Dynamic talk-groups on time-slot 1 may be scheduled to operate as static talk-groups to coincide with specific NET activiies. See the CIARC home page for NET details. See the BrandMeister 311603 Repeater information page for current static talk-group and timed static talk-group information.

Note that the BM prefix in the channel naming indicates that the channel is routed to the BrandMeister network.

NOTE: Dynamic talk-groups are advisory. Technically, it is possible to program any talk-group into your radio's code-plug file and use it. There are no technical restrictions applied by the repeater or the BrandMeister network with respect to dynamic talk-groups. However, the repeater trustee recommends that operators adhere to using the talk-group listing above in as much as is practicable.

Information on the N7IBC repeater that is published on BrandMeister can be viewed by clicking here.

Station operators are requested to limit their use of high-volume traffic talk-groups, such as California statewide 3106 or USA Nationwide 3100. If you need to use a high-volume talk-group, please limit that usage to making a call and then move to a talk-group with lower traffic volume.


Private Calls

Stations making Private Calls are asked to restrict private calls to time-slot 1. Private Calls, whether initiated while on a talk-group, or programmed by setting the TX Contact to a private call contact, can be carried out on time-slot 1. If you do not use a pre-programmed channel for a private call, please make sure that you are on a channel that specfies time-slot 1 prior to initiating a private call. If you are on a time-slot 2 channel when you receive a private call, please, at your earliest convenience, coordinate a pause and switch to a time-slot 1 channel prior to resuming a private call.


N7IBC Repeater Block Diagram

N7IBC DMR REPEATER BLOCK DIAGRAM

The N7IBC repeater is programmed to give repeat audio priority over external PTT (i.e. 33cm link) audio.

The 33cm link will be disabled by default, with its primary purpose being to support the control receiver function on this repeater. Maintining a disabled 33cm link will also avoid issues of simultaneous transmission of DMR time-slot 1 conversations from the W7CIA repeater. Since this repeater uses the BrandMeister cluster feature, and maintains a link to the W7CIA repeater using Regional Talk-Group 8 on Time-Slot 1, and Local Talk-Group 2 on Time Slot 2, users of the CIARC analog repeater network will have access to users of the N7IBC repeater via Time-Slot 1 when the 33cm link is enabled at the W7CIA repeater.

N7IBC Repeater Coverage Footprint

N7IBC DMR REPEATER COVERAGE FOOT PRINT

Clustered Time-Slot / Talk-Group Pairs

The KC7MCC 70cm/UHF DMR Repeater, N7IBC 70cm/UHF DMR Repeater and W7CIA 2m/VHF DMR Repeater are configured to subscribe to a cluster on Time-Slot 1 / Talk-Group 8 and to another cluster on Time-Slot 2 / Talk-Group 2. Respectively, these channels are named TS1 NET and TS2 NET. Any communications occurring on any of these repeaters will be heard on that repeater and the other two repeaters when one of these channels is used. Clustered Talk-Groups are STATIC.

The maintaining of a static talk-group on both time-slots is not conventional. The purpose of doing so is to support primary NET operations on one time-slot, and allowing traffic to be moved off of the primary NET and onto the secondary NET in order to maintain communications capability while allowing the primary NET to serve, unimpeded by traffic, as a coordinating NET. The convention that has been established for these two clustered time-slot/talk-group pairs is that the primary NET operations will be conducted on TS2 NET while off NET traffic will be handled on TS1 NET.

A composite coverage prediction for repeaters included in these clustered channels is shown below:


COMPOSITE DMR REPEATER COVERAGE FOOT PRINT

N7IBC DMR Repeater RESET Events

The RESET event table contains no data for the N7IBC (311603) DMR Repeater. This is indicative that the IP reset module has not yet been installed on the N7IBC (311603) DMR Repeater.

Additional Hytera RD-982 Technical Information

If you are researching the Hytera RD-982 repeater and are looking for additional technical information, including guidance on configuring the RD-982 to participate on the BrandMeister network, please see the W7CIA VHF DMR Repeater page.