This page is a collection of info on the MTR2000 and possibly MTR3000 repeaters.

The MTR2000 was Motorola's mid range repeater in the 2000's, designed to do analog and sit between the two mobiles and the Quantar at the high end. It's basically a quantar-lite, as it runs the same RTOS, pSOS+ and runs on the same Microprocessor, but an integrated version of it and the DSP chip.

Software

File:Motorola MTR2000 R03.02.01.zip

File:28F800 image for MTR2000.bin

File:Mtr2000-OCR30403.CMP

Firmware

Every MTR2000 has an individual firmware package from Motorola much like the Quantar. It contains:

mtr_bpid-file (containing Station-ID)
firmware-file (i. e. ocr30403.cmp)
feature definition string-file (i.e. ocr30403.enc, individual file; needed to identify Serial number in Dallas DS4201 U101 on backplane)

As of now there is no known universal upgrade file for the MTR2000 as there is with the Quantar. A workaround using the OUTLAW depot software may be possible be I have not verified it. What does work is emulating the DS2401 to change the ID during programing via RSS to a known supported license key enabled upgrade.

Procedure to update via DS4201 emulation

This uses an Arduino to emulate the 1 wire serial ID of the DS4201

To use an firmware-file with feature definition string-file from another MTR2000 you have to save your codeplug first
You should install i. e. Oracle VM Virual Box and Windows XP 32 bit in newer systems (tested even with Windows 11) and use an older RS232-USB-adapter, that will work under Windows XP (!!!)
Install Motorola MTR2000 RSS
Download the codeplug and save it! Take screenshots of every alignment data (!!!)
Install putty and create a serial connection to your MTR2000 with 9600 baud
Send commands (you´ll see nothing during input!):
dorss <enter>
get bpn <enter>
write down your backplane number (you can also see it in RSS as station ID)
Remove Backplane cover

You can see „U100“ Dallas serial IC. Be careful and desolder it. You should install it later. Otherwise your repeater will work with Station ID „0000000“. If you destroy the connection of PIN 2 on PCB it´s not so serious; you can find U100-connections on other place as well
Take an Arduino and connect it to your PC. You have to install Arduino IDE on PC. Load MTR2000-DS2401.ino sketch into Arduino IDE and integrate „OneWireHub_library.zip“ in Arduino IDE as library as well
In MTR2000-DS2401.ino-sketch you can modify the DS2401 string: adapt all oft the 4 positions
0x01, 0x1C, 0x11, 0xF1, 0x08, 0x00, 0x00 (for Station ID 8F11111C); first 0x01 is family code, last two 0x00 are always 0x00
Connect pin 1 of U100 IC location on PCB to a ground-pin of Arduino Uno
Connect pin 2 of U100 IC location on PCB to PIN 8 of Arduino

Disconnect Arduino from PC (!) and give it an external power supply; otherwise you´ll have signal problem
Power up your MTR2000 again; MTR2000 should recognice your Arduino as DS2401 and load its station ID alias backplane number; You have to power down every time for more than 15 seconds that MTR2000 forgets the loaded bpn from ds2401 in controller and can load another bpn out of another DS2401
You can check actual station ID via Putty and serial commands

dorss
get bpn

You should do that on your own risk only if you have to upgrade firmware or repair your MTR2000. Station ID seems to be only relevant during firmware upgrade. To unlock a locked MTR2000 just temporarely until next power cycle you can use the following commands via Putty:

dorss
hw_id_check_off
reset

You should see i. e. BPN = 000008F1111C
Load RSS and use upgrade function
You need firmware file .ocr and feature definition file .enc for Station ID 8F11111C in this example
After flashing firmware you can reinstall your DS2401 again
Reload your saved codeplug again and check alignment data from screenshots!

firmware update notes

I'm not 100% sure on this, but I belive the firmware is locked to the base station from motorola using the .enc file that comes with it. Anyone have info on this?

I took the binary image from the 28f800 and did the following to make an image that can be flashed to the station with the OUTLAW program.

srec_cat 28F800\ image\ for\ MTR2000.bin -binary  -offset -0x4000 -o 28F800MTR2000.srec -Motorola 32 -address-length=3 -line-length=270 -data-only

This should at least replicate what's in memory. Likely can take the raw uncompressed firmware file from the update and add it into the end of it.

the .CMP file is nothing other than LZSS compressed data. Specifically it's the SZDD file format, and COMPRESS.EXE and EXPAND.EXE from DOS can expand the file directly. The header of the CMP file is "0x535A444488F02733" or "SZDD..'3" ascii, hence the SZDD name.

Docs

The MTR has a depot manual, but it's not available AFIK. IF you have one, please tell me, I will happily send you a shipping label, have it scanned professionally and send it back all at my cost. We have a partial UHF and SCM manual now below!

The part number for the Depot Manual are 68P81096E40, and 68P81096E35, VHF/UHF respectively.

It's likely the RF circuits are identical (or close enough) between the Quantar and the MTR. For Example, the Power Amp uses the same pallet amplifiers/LPF/isolators as the Quantar does.

MTR2000 Install and Operation Manual 68P81096E20

Field Service Manual 335-405 MHz 6881099E80-F - Field Service Manual 335-405 MHz 6881099E80-F

Field Service Manual 800-900 MHz 6881096E90-F - Field Service Manual 800-900 MHz 6881096E90-F

Field Service Manual 6881096E25-G - Field Service Manual 6881096E25-G

Field service 6881096E32-E - SCM Field service 6881096E32

TRBO/DMR Upgrade Quick Reference Guide 68012000068-B

RSS Startup Manual 6881096E15 - RSS Startup Manual

MTR2000 Rear-of-station (backplane) connectors