Lab-T MR-900 User manual

REPORT No.:TRRFCC17-0002
FCC ID : YJHMR-900
Copyright ⓒ2017. Lab-T, Inc.
User Manual

MULTICOM REPEATER 900MHz
Ver. 1.10
USER'S MANUAL
(MR-900)

1. General Information
1.1 Introduction
The "Multicom Repeater 900MHz" is designed by using the most advanced
Self-Repeating communication technology. It serves user-friendly features
and also extremely convenient to expand the communicating coverage
of Multicom.
It gives expanding of communicating coverage around 2.1km~3.0km
typically by consist of 2 Repeaters with up to 8 users multiplex
communication excluding Reprater itself.
Furthermore, it is available to expand the talk range by cable connection
between Repeater.
In this case, the talk range is dependant on the cable length and maximum
available handsets are 16 units in full duplex excluding Repeater itself.
It is recommendable you read the user’s manual thoroughly to enjoy its
maximized performance and features this repeater has to oer.
1.2 Main Features
* Long distance communication coverage over 2.1km ~ 3.0km typically
* 39 dierent Group communicating selection per Repeater
* Audio output HI/Low selection
* Audio volume control with 9 steps
* Side tone On/O selection
* Direct microphone sensitivity control with 5 steps
* Convenient USB power source for the purpose of its portable using by
connection Mobile phone Power bank into it or DC 5.0V adapter via AC
input

2. Controls and Indicators
Power S.W
Mode Button
Up Button
Down Button
EAR/MIC
XLR-4PINs
Antenna Jack
USB
55 JACK
XLR-3PINs
Upward : Power Turn ON / Downward : Power Turn OFF
Selection of Group Number, Device ID, Side Tone On/O, Mute Mode,
Microphone Sensitivity level and Audio Output Loud
Control to be Up the level in the selected mode
Control to be Down the level in the selected mode
3.5mm External Headset Boom Microphone Jack(EHR-01)
XLR Headset Jack (Mic In / Audio In)
Long diversity Antenna Jack
USB Jack. compatible with Power Bank for mobile phones
55 Jack Audio Line In
XLR Jack Audio In / Out
UP Button (Local)
Down Button (Local)
Mode Button (Local)
UP Button (Relay)
Down Button (Relay)
Mode Button (Relay)
55 Jack
(Audio Line In)
Antenna Jack 1
USB 1
XLR-3PINs
(Audio In / Out)
Antenna Jack 2
USB 2
XLR-4PINs (Desk top Mic. In/Audio In) Power S.W
Ear / MIC
LCD (Relay) LCD (Local)

3. How to use
3.1 Relay Part
The Multicom Repeater is consist of two parts, Relay part for repeating
between repeaters - Left side LCD and Local Communication part for
communicating between Repeater and its belonging up to 4 Multicom
handsets - Right side LCD.
1) Power On/O
Press the "Power S.W" switch to the upward to turn the stationary power on.
The LCD display is on and shows the default volume level with "VOL 03".
If you pressed the "Power S.W" to the downward, the stationary power is
turned o.
2) Group selection
Press and hold the "Mode" button longer than 3 seconds after turn the device
power on. The "GRP" symbol on the LCD is blinking. Select the Group number
0~2 as you desire by press "" or "" button and then release all the buttons
longer than 5 seconds to x it.
Note; It is required to have the same group number between the repeaters you
want to relay the communication consecutively in a relay system and also keep
a distance longer than 10m between repeaters.
Show the selected Group Number "00" Show the selected Group Number "01"
Left side LCD
- Relay part
Right side LCD
- Local Communication part
Left side LCD


Show the selected Group Number "00" Show the selected Group Number "01"

3) Group selection
Press and hold the "Mode" button longer than 3 seconds after turn the device
power on. The "GRP" symbol on the LCD is blinking. Select the Group number
0~39 as you desire by press "" or "" button and then release all the buttons
longer than 5 seconds to x it.
Every radio needs to have a same Group number to communicate each
other in a group.
3.2 Local Communication part
1) Power On/O
Press the "Power S.W" switch to the upward to turn the stationary power on.
The LCD display is on and shows the default volume level with "VOL 03".
If you pressed the "Power S.W" to the downward, the stationary power is
turned o.
2) Volume Up / Down
It gives you to adjust the hearing volume level with 9 steps as per you prefer.
Press "" button to control volume up and "" button for volume down
after turn the device power on.
It is available to adjust the volume level 0~9 from low to high.
Note; The default volume level is 3 and the volume level returns to 3 all the
times whenever you power switch turned o and on.

4) ID selection
In a group, every Multicom devices needs to have each dierent ID per device
from "00" to "99".
The ID "00" becomes a master device in a group and every group needs to
have a master device with ID "00" per group without alternative. The "MASTER"
is displaying on the LCD as soon as the ID "00" is set.
Press and hold the "Mode" button longer than 3 seconds after turn the device
power on. The "GRP" symbol on the LCD is blinking.
And press the "Mode" button one more time instantly.
The "ID" symbol on the LCD is blinking.
Select the ID number to“00”per Repeater by press "" or "" button so that
every Repeater becomes a master station in a group and release all the buttons
longer than 5 seconds to x it.
And Multicom handsets who belong to the Repeater station need to tune
the same group number as the Repeater has and set every dierent ID from
"01" to "99" per Multicom handset in a local communication group.
5) Audio Output mode High / Low
It serves you to choose higher audio output or lower beside of Volume
Up / Down. The higher audio output is eective when you listen to the device
at the heavy noise place. Press and hold the "Mode" button longer than
3 seconds after turn the device power on.
The "GRP" is blinking on the LCD. Press the "Mode" button 6 times instantly.
Select either "UH" for higher audio output or "UL" for lower audio output by
press "" or "" button and then release all the buttons longer than
5 seconds to x it.

6) Microphone sensitivity level control
It is available to select the microphone sensitivity up to 5 steps according to
the environment you have. Press and hold the "Mode" button longer than
3 seconds after turn the device power on.
The "GRP" is blinking on the LCD. Press the "Mode" button 5 times instantly.
Select the microphone sensitivity level 1 ~ 5 as per you desire by press
"" or "" button and then release all the buttons longer than
5 seconds to x it.
Note; 5.1) Its default setting is "UL".
5.2) There might be a kind of white noise creation when you set the audio
output at "UH".
Hence, it is recommendable to set the audio output at "UL" except using
the device at the heavy noise surround place.
Note; 6.1) The "C 1" is the lowest microphone sensitivity level and "C 5" is the
highest.
6.2) Its default setting is "C 1".
7) Portable using
It is available to use the Repeater as a portable device rather than the xed
station.
Please connect the Power bank for Mobile phone into the USB port of Repeater.
After that, place the Repeater wherever you prefer
Normal Audio Output mode Loud Audio Output mode

4. Specifications
ITEM SPECIFICATION
Radio Frequency Type ISM ~
Type Wireless Microphone/Receiver Unit
Radio Interface FSK Modulation with Frequency Hopping
Voice Codec 16bit/8KHz
Tx Max Output Power 18 dBm Typical
Rx Sensitivity -95dBm
Voice Latency < 35ms
Num. of Frequency Channel CH
Channel Spacing
Data Rate 2 Mbps
Freq. Bandwidth
Power Supply 5V, 3A DC USB adaptor or External Battery
Antenna External Dipole Antenna
Power Consumption Avg. 180mA
Distance Range(LOS) 1.0 Km
Frequency Response 50 Hz ~ 4 KHz
Compliance Statement
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES.
Operation is subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
CAUTION
Changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
WARNING
While this equipment is in operation, a separation distance of at least 20 centimeters (equal
to 8 inches) must be maintained between the antenna inside the equipment and the bodies
of all persons exposed to the antenna in order to meet the FCC RF exposure guidelines.
Making changes to the antenna or the equipment is not permitted. Doing so may result in
the equipment exceeding the FCC RF exposure guidelines. This equipment must not be co-
located or operated in conjunction with any other antenna or radio transmitter.
903MHz
926.5MHz
500KHz
300KHz
48

5. How to install
5.1 Single block repeating with two repeaters
700~1,000 m
700~1,000 m
* The group number in a relay part between Repeater 1 & Repeater 2 needs to
be the same.
* The group number in a local communication part between Repeater 1 &
Repeater 2 needs to be dierent.
* The group number between Repeater 1 and its belonging 4 Multicom
handsets need to be the same.
* The group number between Repeater 2 and its belonging 4 Multicom
handsets need to be the same.
* The ID number of Repeater 1 and Repeater 2 need to be "00".
* The ID number of each repeater's belonging 4 Multicom handsets per group
need to be dierent.
<Expanded communication coverage around 2.1km~
3.0km total>
Repaeter 1
700~1,000 m Repaeter 2
Relay part
ID : 00
Local part
ID : 01
Group : 00 Group : 09
Relay part
ID : 01
Local part
ID : 01
Group : 00 Group : 19

Notice ;
It is required to keep a distance longer than 10m at least between Stationary
and Stationary. Otherwise, it might cause the interference each other and the
drop of performance on both stationeries.
5.2 How to set between Repeater 1 and Repeater 2
5.3 Line repeat communication between Repeater and
Repeater(To be conrmed)
1) Relay part
Tune the group number“00”on Repeater 1 and Repeater 2.
Even it is available to use any other Group number, It is required to tune the
same group number between Repeater 1 and Repeater 2.
Set the ID“00”on the Repeater 1 and set the ID“01”or any other number
except “00”on the Repeater 2.
2) Local part
Set the Group number“09”on Repeater 1 and its ID number“00”.
Set the Group number“19”on Repeater 2 and its ID number“00”.
Even it is able to use other Group number on Repeater 1 & 2,
It is recommendable to set the Group number far from“00”and also dierent
each other between Repeater 1 & 2 as many as possible to minimize the
mutual interference.
It is available to repeat the communication in one Repeater to the other
Repeater by cable connection between two Repeater.
Please connect to two XLR 3 port of Repeater by using“XLR Repeater
only cable”. In this case, each Repeater are able to do full duplex communication
with 9 Multicom handsets per Repeater, Which means total 18 people
in full duplex.