- Amateur Radio (Ham Radio) Community

Call Search

New to Ham Radio?
My Profile

Friends Remembered
Survey Question

DX Cluster Spots

Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement

Reviews Categories | Ham Repeaters | Motorola XPR 8400 Help

Reviews Summary for Motorola XPR 8400
Motorola XPR 8400 Reviews: 1 Average rating: 4.0/5 MSRP: $$2000
Description: MOTOTRBO is a "Time-division multiple-access" (TDMA) Digital Repeater,
available in VHF (2-Meter), UHF (70-CM), and 900MHz. (33-CM) bands. With full
support for conventional analog FM @ 25.0 kHz. and 12.5 kHz. as well as 2-Slot
TDMA Digital and Dynamic Mixed-Mode Support. Reliable 100% continuous full-
duty cycle operation.
Product is in production.
More info:
Email Subscription
You are not subscribed to this review.

My Subscriptions
Subscriptions Help

You can write your own review of the Motorola XPR 8400.

W2GLD Rating: 4/5 Nov 1, 2013 21:45 Send this review to a friend
Rock solid digital platform!  Time owned: more than 12 months
This is an excellent platform for those seeking a digital repeater with a robust inter-connected network of users worldwide. This isn't D-Star, so let's not even compare it as such! MOTOTRBO is a 2-Slot "Time-division multiple-access" (TDMA) digital platform that allows for two simultaneous conversations to occur on one 12.5 kHz. digital frequency by splitting the traffic packets into "time-slots". Channels are no longer single frequencies, they are broken down into talkgroups which are spread across the two slots. In addition, text messaging and private calls can be achieved. Couple this technology with the vastly growing internet c-Bridge community and you're connected throughout the world. For additional details on the amateur radio "DMR" network, visit and for all the details.

Now, this repeater isn't just for digital users. You can also use this repeater as a basic conventional analog FM repeater with either 25.0 kHz. or narrowband 12.5 kHz. channels. For an additional upgrade charge, you can also upgrade this repeater to perform in "mixed-mode" operation, allowing users to dynamically choose what format to use; however, there is a major limitation with this upgrade license and that is you CANNOT use the IPSC networking capabilities, which means, while you can use digital on the local repeater, you'll miss out on all the worldwide connectivity that the c-Bridges have to offer. This is a major flaw from Motorola on this as I have two ICOM IC-FR5000/6000 repeaters that allow users to choose either conventional analog FM, digital local, or digital worldwide. The ICOM's also allow me to retain my IRLP, EchoLink, Allstar Link, Remote Base, etc. all in one repeater. With that said, I've just setup the Motorola XPR 8400 for digital only and it's connected to the ISPC network through the DCI system; which by the way is the most robust of all the MOTOTRBO networks as it allows connectivity to a wide-variety of talkgroups throughout the world.

Overall, this is a great repeater for TDMA digital and would be a great repeater for anyone considering MOTOTRBO in the future as this would provide an easy upgrade path. For those installing these repeaters at remote locations, a must have upgrade is the IP Remote Programming option for the Customer Programming Software (CPS). This option not only allows you to make changes to your repeater, but any repeater connected to your own network as well as update firmware remotely. One license per computer is required, so if you're a club with three repeaters at different locations, one user can manage all the codeplug information and updates from a central computer. IP Programming makes managing these repeaters a snap. With that said, it comes as a standard option with the ICOM IC-FR5000/6000 series if you're IP connected. In-fact, there aren't any options to buy; however, you'd be missing out on MOTOTRBO and thus why my analog machine is an ICOM IC-FR5000 (2-Meter) and IC-FR6000 (70-CM) linked together and tied to the NXDN Worldwide Network, and houses my IRLP, EchoLink, Allstar Link, HF Remote Base, etc. The XPR 8400 is all MOTOTRBO, and the only thing better than this repeater for MOTOTRBO is the 100-watt Motorola MTR-3000...

If you have any questions, problems, or suggestions about Reviews, please email your Reviews Manager.