Lab-T GrandCom-900 User manual

Copyright ⓒ2021. Lab-T, Inc.
User Manual

Ver.10715DCCI
Maytel Co., Ltd.
USER'S MANUALFOR
GrandCom
TheMostOptimizedWirelessIntercomSolution
forHands-freeSimultaneous Communication
between Multiple People
Model;GC-900

1. General Information
page 2 DCX-P400 User’s Manual
1.1 Introduction
 
1.2 Main Feature



GrandCom is awirelessintercomavailableof simultaneous
communicationbetween maximum of 10 people and supports9 people
talkingsimultaneously and unlimitednumber of listeners.
Equipped with 4 operationmodes to selectthe most optimizedmode
in the eld depending on the talk distancein the eld environment.
Crystalclear sound qualitywith perfectnoise cancellationfunction.
Thisis the best solution with a full-duplexcommunicationapproach
thatallowsyouto use both hands freelyand maximizesuser
conveniencewithout the need to operatethe deviceduring
communication.
Realize9xedusers +Anyone out of unlimited participantsdirectly
talkingtogether with hands-free simultaneously while restmembers
arelistening.
Support4professionaloperating modes and directly selectthe
optimized mode accordingto the environmentin the eld
to ensuremaximum talk performance.
Worldwidecompatible 900MHzfrequencyrange.
Crystalclear sound quality,loud enough audio outputand super
dynamic noise cancellation morethan 95dB.
Longenough talk distance through4professionaloperating modes
thatcan be directly selected in the eld.
Completelysecuredtalk throughindividualPIN encryptionsettings for
each groupdirectly by the user.
IP54performance,including strongand ruggedmechanism.
Convenient drop-inchargingand USB chargingsystem.

2. Controls and Indicators
page 4 DCX-P400 User’s Manual
TALK
Button
MODE
Button
Headset Jack
LCD
Antenna
Down
Button
UP
Button
Power
Button
2.1 GC-900
USB Jack
(only, Firmware upgrade)
LABEL
The Label can be seen
when the battery cover
and battery are removed.

page 5 DCX-P400 User’s Manual
Power Button
Press and hold the Power button for a second to turn the device
power On/O
MODE Button
Select Group number, ID number, Side Tone On/O,
Microphone sensitivity Level, Operation mode selection and Wireless
alarm
Up Button
Increase Volume Level, Channel number, and ID number etc. in each
mode
Down Button
Decrease Volume Level, Channel number, and ID number etc. in each
mode
TALK Button
Talk and Mute On/O
LCD
Indicate current status and setting
MIC Jack
Microphone contact
USB Jack

Type-C USB portforrmwareupgrade (No USB charging function)

2.2 LCD
page 6 DCX-P400 User’s Manual
Signal Strength
Volume
Battery Status
ID
Group
Current Setting
TALK State
Set as Master
Operation Mode (9+Any one mode)
Operation Mode (Relay mode)
Operation Mode (Starcast mode)
I D
GRP
VOL ST RP
RL
RM
VOL
I D
GRP
ST
RL
RP
Operation Mode (Roaming mode)
RM

3. Four Mode
page 7 DCX-P400 User’s Manual
3.1 [ST] 9+any one Mode
9 xed user + any one out of the participants talking together
simultaneously
3.1.1 Operation Mode
ID of the device is assigned from 00~08, A (Any one), L (Listen Only), 09.
Refer to Table 1 below
Table 1 Operation Mode
ID Master
/Slave ID Status Explanation
00
01
02
03
04
05
06
07
08
A
L
09
Master
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Fixed TX/RX of ID 0
Fixed TX/RX of ID 1
Fixed TX/RX of ID 2
Fixed TX/RX of ID 3
Fixed TX/RX of ID 4
Fixed TX/RX of ID 5
Fixed TX/RX of ID 6
Fixed TX/RX of ID 7
Fixed TX/RX of ID 8
ID 9 ; Shared
Listen Only
Fixed TX/RX of ID 9
Must exist in each group
Full duplex simultaneous communication
between the members
Full duplex simultaneous communication
between the members
Full duplex simultaneous communication
between the members
Full duplex simultaneous communication
between the members
Full duplex simultaneous communication
between the members
Full duplex simultaneous communication
between the members
Full duplex simultaneous communication
between the members
Full duplex simultaneous communication
between the members
Unlimited, Can listen to other members’ conversation,
Can talk by pressing the Talk button
Unlimited, Can listen to other members’ conversation
Full duplex simultaneous communication between the
members, Should not use A when setting the device

page 8 DCX-P400 User’s Manual
3.2 [RM] Roaming Mode
Talking distance expansion thru mutual relay between Master and
Submaster
3.2.1 Operation Mode
ID of the device is assigned from 00~08, A (Any one), L (Listen Only), 09.
Refer to Table 2 below
Table 2 Operation Mode
ID Master
/Slave ID Status Explanation
00
01
02
03
04
05
06
07
08
A
L
09
Main
Master
Sub Master
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Fixed TX/RX of ID 0
Fixed TX/RX of ID 1
Fixed TX/RX of ID 2
Fixed TX/RX of ID 3
Fixed TX/RX of ID 4
Fixed TX/RX of ID 5
Fixed TX/RX of ID 6
Fixed TX/RX of ID 7
Fixed TX/RX of ID 8
ID9 ; Shared
Listen Only
Fixed TX/RX of ID 9
Must exist in each group
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Unlimited, Can listen to other members’ conversation,
Can talk by pressing the Talk button
Unlimited, Can listen to other members’ conversation
Full duplex simultaneous communication between the
members, Should not use A when setting the device

page 9 DCX-P400 User’s Manual
3.3 [RP] Repeater Mode
Ideally located Master unit relays each user’s talking to minimize the
impact of surrounding obstacles
3.3.1 Operation Mode
ID of the device is assigned from 00~07, A (Any one), L (Listen Only), 08.
Refer to Table 3 below
Table 3 Operation Mode
ID Master
/Slave ID Status Explanation
00
01
02
03
04
05
06
07
A
L
08
Master
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Fixed TX/RX of ID 0
Fixed TX/RX of ID 1
Fixed TX/RX of ID 2
Fixed TX/RX of ID 3
Fixed TX/RX of ID 4
Fixed TX/RX of ID 5
Fixed TX/RX of ID 6
Fixed TX/RX of ID 7
ID8 ; Shared
Listen Only
Fixed TX/RX of ID 8
Must exist in each group
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Unlimited, Can listen to other members’ conversation,
Can talk by pressing the Talk button
Unlimited, Can listen to other members’ conversation
Full duplex simultaneous communication between
the members, Should not use A when setting the
device

page 10 DCX-P400 User’s Manual
3.4 [RL] Relay Mode
Long-distance relay via two-way radio for intra-group talking
3.4.1 Operation Mode
ID of the device is assigned from 00~08, A (Any one), L (Listen Only), 09.
Refer to Table 4 below
Table 4 Operation Mode
ID Master
/Slave ID Status Explanation
00
01
02
03
04
05
06
07
08
A
L
09
Master
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Fixed TX/RX of ID 0
Fixed TX/RX of ID 1
Fixed TX/RX of ID 2
Fixed TX/RX of ID 3
Fixed TX/RX of ID 4
Fixed TX/RX of ID 5
Fixed TX/RX of ID 6
Fixed TX/RX of ID 7
Fixed TX/RX of ID 8
ID9 ; Shared
Listen Only
Fixed TX/RX of ID 9
Must exist in each group, Connected with 2way radio
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Full duplex simultaneous communication between
the members
Unlimited, Can listen to other members’ conversation,
Can talk by pressing the Talk button
Unlimited, Can listen to other members’ conversation
Full duplex simultaneous communication between
the members, Should not use A when setting the
device

4. How to Use
Figure 1
4.1 Functions
There are 2 operation modes, NORMAL mode and SETTING
mode. The default mode is NORMAL when turn on the power.
Long press MODE button to go to setting mode. Setting values are
shown in the order of GROUP-> ID-> SIDE TONE-> MIC GAIN ->
SEC CODE -> MODE change as shown in Figure 1.
Can see the setting modes in order when short press the MODE
button.
Long press MODE button to go to SETTING mode to change the
setting values such as Channel and ID.
page 11 DCX-P400 User’s Manual
ID
SIDE TONE
S1~5/SF
Group
GRP
MIC GAIN
(C1~C8)
SEC CODE
(30~3F)
(20~2F)
(10~1F)
(00~0F)
MODE SETTING
(4 MODE)
VOX
(A0~A4, AF)

VOL
ST
page 12 DCX-P400 User’s Manual
4.2 Power On/O
Press and hold the "Power" button for a second to turn the device
power on/o.
4.3 Volume Adjustment
Volume Level appears on the top of the LCD screen when turn on the
power.
In NORMAL mode, adjust the volume to the desired level by pressing
Up/Down button on the left side of the device.
Volume can be set from 0 ~ 8 [Default Level: 3]
Volume adjustment function to let the user to change the volume when
needed.
4.4 Group Selection
Turn on the power of the device.
Long press the MODE button then the LCD screen becomes SETTING
mode and blinks.
Press Up/Down button on the left side of the device to set the desired
Group.
Group setting function to let the user to change the Channel when
needed.
GRP

GRP
page 13 DCX-P400 User’s Manual
4.5 ID Selection
Turn on the power of the device.
Long press the MODE button to go to SETTING mode.
Short press MODE button to go to ID Setting screen, and blinks.
Press Up/Down button to set to the desired ID.
Refer to Tables 1~4 for ID Setting method of each Mode.
ID setting function to let the user to change ID when needed.
Long press the MODE button to nish the setting.
Group can be set from 0~39
Long press the MODE button to nish the setting.
I D
I D

4.6 Side Tone Selection
Turn on the power of the device.
Long press the MODE button to go to SETTING mode.
Short press MODE button to go to ID Setting screen
The user can turn Side Tone level 1(SO) ~level(S5) 5 or O(SF) by
Up/Down buttons.
Side Tone can be turned On/O
Long press the MODE button to nish the setting.
page 14 DCX-P400 User’s Manual
4.7 Microphone Sensitivity Level Selection
~
~
Turn on the power of the device.
Long press the MODE button to go to SETTING mode.
Short press MODE button to go to MIC level setting screen.
Adjust the MIC gain setting by Up/Down buttons.
MIC gain Level can be adjusted when using.
Long press the MODE button to nish the setting.

page 15 DCX-P400 User’s Manual
4.8 Security Code Selection
Turn on the power of the device.
Long press the MODE button to go to SETTING mode.
Short press MODE button to go to security code setting screen.
The user can change the Security Code by Up/Down buttons.
Security Code is composed of 4 digits and each digit can be set as
0~9, A, b, C, d, E, F.
Security Code can be set one digit by one digit. Short press MODE
button to move to the next digit. 1, 2, 3, 4 on the left indicates
which digit the code is located. The right indicates hexadecimal
number.
For example, to set the code as 0xFC10, it should be set in the
following order: 3F -> 2C -> 11 -> 00.
Security Code can be modied by the user.
Long press the MODE button to nish the setting.

page 16 DCX-P400 User’s Manual
4.9 Roaming Setting
Roaming function can be set by the user. It can be set as Auto Roaming,
Manual Roaming, Master Fix, Sub master Fix.
4.10 Operation Mode Selection
Operation Mode can be selected to boot the device with the selected
one of the 4 modes.
Turn on the power of the device.
Long press the MODE button to go to SETTING mode.
Short press MODE button to go to Operation mode selection setting
screen.
Press Up/Down buttons to select the desired application.
; Operation Mode
- P0 ; indicates ST Mode
- P1 ; indicates RL Mode
- PS ; indicates RP Mode
- PH ; indicates RM Mode
Long press the MODE button to nish the setting.
The power automatically goes O once the Operation Mode has
changed. The device will be booted with the changed application
when turn on the power afterwards.
Roaming function Description
H0
H1
H2
H3
Auto Roaming
Manual Roaming. Short press
Power button to manually change
connection between Master and
Sub master
Master Fix
Sub master Fix

page 17 DCX-P400 User’s Manual
4.12 Audio Alert
~
,
Low battery
Out of link
; Short & repetitive tone occurs every 2min.
; Tone cotinuously repeats every 2min when the device
is out of link.
4.11 VOX Selection
Vox can be set with this function.
Vox function operates on devices with ID 0~ID 9.
Turn on the power of this device.
Long press the MODE button to go to SETTING mode
Short press MODE button to go to VOX mode selection setting screen.
Adjust the VOX Level setting by Up/Down buttons.
VOX Level
- 0 ~ 4 (VOX on)
- F (VOX o)

Dimension
120 x 53 x 18.5 mm
Dimension w/Belt clip
121.8 x 56.6 x 27.2 mm
Radio Frequency Type
Modulation
GFSK with FHSS ; Frequency hopping
Tx Max Output Power
100 mW
Rx Sensitivity
-95dBm
Number of full duplex(FD) users
Maximum 10 (including Master)
Number of simultaneous listeners
Unlimited(w/up to 9 FD users)
Number of listeners with PTT
Unlimited(w/up to 9 FD users)
Channel spacing
500KHz
Frequency response
50~4,000Hz
Distance(loss of signal)
500meters(typical)
5. Specication
page 18 DCX-P400 User’s Manual
ISM 903MHz~ 926.5 MHz
Operating Temperature
-10 ~ +50

Number of group
40
Number of groups operating in the same area
5 (With 5 meter separation between groups)
Environmental Rating
IP54
Power Supply
Li-ion Battery @3.7V/ 1,100 mA
Antenna
Internal
page 19 DCX-P400 User’s Manual