Relacart Electronics DAM-800 User Manual

DAM-800 8-Channel Digital Automatic Mixer

User Guide

Instructions

Thank you for choosing RELACART automatic mixer system. You have joined thousands of specialized
customers. Our years of professional experience of design and manufacturing ensure the quality,
stability and performance of our products.

01 Safety Precautions

1. Please read specifications for safety precautions carefully before installation and operation.

2. Please keep the safety specification for future reference.

3. Do not scratch, bend, twist, stretch or heat the power cord, otherwise may damage the power cord
and lead to fire or electroshock.

4. Do not open the casing, otherwise may lead to electroshock, please contact our local agent if need
maintenance or repair.

5. Do not touch the plug with wet hand, otherwise may lead to fire or electroshock.

6. If power cord is damaged (breaking or baring cable core), please contact agent for replacement.
Continue to use the damaged power cord may lead to fire or electroshock.

7. Before moving the device, please switch off the power, pull out the power plug and all contact
cables, otherwise may damage the cables and lead to fire or electroshock.

8. Please cut off power, pull out the power plug and all contact cables before cleaning the device. Use
dry and soft cloth when cleaning.

9. Please cut off the power, and it would be better to pull out the power plug
long time.

10. All Relacart products offer one year free warranty except for the damage as following:

A、 Device is damaged by man-made factors.
B、 Device is damaged by improper operation.

C、 Some components are damaged or loss by self-disassembly.

if the device is not in use

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02 Products Introduction

DAM-800 8-channel digital automatic mixer is the perfect combination of digital control technology

and digital signal processing, high-performance DSP core design, fully automatic operation, without

manual intervention.

Digital automatic mixer with automatic checking and tracking each microphone input state,

automatic gain adjustment. For the output of microphones which are not in the working state will be

“attenuated" (closed). When detect that the microphone is with input, it will be "enhanced" (open) the

output. At any time, try to avoid opening multiple microphones that will deteriorate sound quality. To

minimize the number of open microphones to suppress background noise and improve speech

intelligibility.

Digital automatic mixer easy to install, simply set in the meeting spot, which can play function
automatically without complicated setup tasks. And can choose the automatic shutdown function or

manual function that forces to shut down the mic as needed, under the guidance of the MASTER,

enabling meeting proceeded smoothly. Support multiple cascading, full intelligent meeting management,

with AES digital audio output interface, can easily form a powerful, easy-digital intelligent conferencing

system.

Key Features：

● Eight independent channels, allowing the gain adjustment for each channel.

● Noise Adaptive Threshold (NAT) manages the audio system by distinguishing dynamic audio (such as

speech) and the noise floor (such as air conditioning). It continuously adjusts the activation threshold,

so that only speech level louder than the background noise can open a channel.

● Digital mode linking, up to 16-unit daisy chain by accessory link cable to allow maximum 128 channels

operation. And the circuit can count the gain which is the most suitable to whole system, effectively
avoiding the feedback.

● Last Mic Lock On. The last opened channel remains open until another one takes its place.

● Full digital signal processing. Built-in low-pass and high-pass filter, MagicEQ, 8*2 matrix. Basic

function can be operated on the panel. For additional detail setting, connect the mixer to a PC with

specific software.

● 48V phantom power individually selectable for each channel, either line or microphone input available.

● Besides the two analog outputs, the system is with AES digital audio output port, allowing the

connection to digital recording system.

● The mixer can connect to a PC by TCP/IP or Android phone by WIFI for remote control, remote

diagnostics and upgrades. Specific software is included with every DAM-800.

● 5 parts of custom equalization for each channel, allowing the setting of frequency and gain.

Independent low-pass and high-pass switch for each channel.

● RS-232 ports allow the connection to external control and video tracking system.

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03 Functions Overview

The system setting difference on the panel and on the computer after connecting to the host: the

panel can only be used for basic operation; the computer can control the entire system.

Function Setting Default Panel Setting

Input level 0dB
Phantom Open
Amplifier gain Open
High-pass filter Close
Low-pass filter Close
Priority channel Close
MUTE Close
Output level MUTE
LOCK Close
Threshold operation mode Auto
Compressor (limit) Close
Last mic lock on Open
Channel maintenance time Open

○ ○
○ ○
○ ○
× ○
× ○
○ ○
× ○
○ ○
○ ○
○ ○
× ○
× ○
× ○

Mobile Phone /

Computer Setting

× Can not be set ○ Can set

04 Names and Functions of Mixer Parts

DAM-800 Front Panel

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3

4

① Channel 1 to Channel 8 Input Settings

Input audio gain: 60 section digital potentiometer with 15 section LED position display.
Microphone/line inputs choice:
Microphone inputs — Press the button of Gain, when Line LED twinkle that indicate enter the function

selection. Press the button again, when the green LED is on, it indicates microphone input, and the 48V
phantom power will be open automatically.
Line-level inputs — Press the button of Gain, when Line-level LED twinkle that indicate enter the

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5

function selection. Press the button again, when the red LED is on ,it indicate line-level input, input port
will be attenuated 20dB and 48V phantom power will be closed automatically；

Line-level LED display status

LINE LED

Channel status display
Twinkle Microphone/line-level inputs choice
Green light Microphone inputs
Red light Line-level inputs

Peak LED display for the input signal peak: normally LED does not light, if there is a red signal, which
means that the input is too large。 Please adjust the current channel gain button to reduce the input gain.
ON LED display for the threshold operation: When the green LED is on, it indicates that the channel
has been opened.

② Output level display LED
Audio output level display: MASTER 1 is MASTER OUTPUT 1 channel audio singnal level

indicator，MASTER 2 is MASTER OUTPUT 2 channel audio singnal level indicator。

③ MASTER output setting

Audio output level setting: 60 section digital potentiometer with 15 section LED position display.
Microphone/line-level outputs choice:
Microphone outputs — Press the button of Gain, when Mic LED twinkle that indicate enter the function

selection. Press the button again, when the MIC LED red light is on, it indicates microphone output, and
output port will be attenuated 20dB.
Line outputs — Press the button of Gain, when Mic LED twinkle that indicate enter the function
selection. Press the button again, when the LED is off, it indicate that line-level outputs have been
selected.

Mic LED display status

Mic LED

Channel status display
Twinkle Microphone/line-level outputs choice
Red light Microphone outputs
LED off Line-level outputs

MASTER audio output: Press the button of Gain, when LED twinkle，adjust the button to choose
MASTER 1/ MASTER 2 channel，1. when the red light is on, it indicate MASTER1 volume adjustment，

2. when the red light is on, it indicate MASTER2 volume adjustment。

④ Threshold setting
Threshold control level adjustment: encode switch coordinate with 15 section LED position display.
Manual-manual/ automatic threshold selection: Press the level button，Manual LED twinkle，that

indicate enter the function selection，Press the level button again, when LED green light is on that
indicates threshold voltage is automatic control, when LED red light is on, can rotate the button to adjust
the threshold voltage .
Global-Global/Local selection: the red LED is on indicates the MASTER, the LED light is off indicates
the slave.
LOCK-Panel board lock: Press the level button, LED twinkle, Press the level button again the LED red
light is on that indicates the panel board is locked.

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⑤ POWER switch (with indicator)

DAM-800 Rear Panel

1

① Power input socket: standard IEC socket can accommodate 100V-240V 50/60Hz AC power.
② Cooling fan: cooling for internal components, make the mixer work more stably.
③ Channel 1 to channel 8 AF input port: 3P fast contactor balanced input with 48V phantom power.

Can be set to Mic/Line-level input.
④ Main analog audio output port: 3P Fast Connector balanced output, can be set Mic/Line-level
output, dual channel output, can choose the channel MASTER OUTPUT 1 or MASTER OUTPUT 2.
⑤Multiple mixers interconnect output port: Interconnection output port can connect to another input
of the mixer, increasing the number of channels used.
⑥ Multiple mixers interconnect input port: Interconnection output port can connect to another output
of the mixer, increasing the number of channels used.
⑦ External control inputs and outputs (RS-232): External control can connect external equipment as
needed, enhancing use of the input signal for each channel forced switch, the output of the current state
for each channel.
⑧AES digital audio output interface: AES digital audio output interface, can connect to digital
recording equipment.
⑨ RS-232 port: Computer control the connection port, the port can be used with the computer COM
port connection.
⑩Network interface: Control the whole system with specific software by wired or wireless network.
Wireless network allows the control of cell phone.

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05 Instructions of Installation and Connection

1、Multiple mixers cascade

When multiple mixers are used simultaneously, hand-in-hand connect the LINK IN and LINK OUT port
on the rear panel with “S terminal cable”, the maximum cascading is 16 units. (As shown in Fig).

Connect the mixer, daisy chain function automatically open. Then you can choose the mixer

MASTER and slave, and the audio output of slave is through the MASTER audio output port.

2、Mixer connect to video tracking system

DAM-800 8-channel digital automatic mixer can connect to the VTS-1000 video tracking system by

the RS-232 port to achieve the video conference.

RS-232 port pin indication
RS-232 diagram

Pin indication
1: NC
2: TX(Data output)
3: RX(Data input)
4: NC
5: GND

Connect the LINK IN port with the last mixer
Connect the LINK OUTport with next mixe

6: NC
7: NC
8: NC
9: NC

MASTE

Slave 1

Slave 2

Slave16

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3、Mixer connect to external control system

DAM-800 8-channel digital automatic mixer can connect the external control system by logical port

to achieve external intelligent control.

EXTERNAL CONTROL EXT I/O port pin indication：

EXTERNAL CONTROL (Figure)

Port pin indication
1: CH8 OUT
2: CH7 OUT
3: CH6 OUT
4: CH5 OUT

5: CH4 OUT
6: CH3 OUT
7: CH2 OUT
8: CH1 OUT

9: GND
10: GND
11: GND
12: GND
13: GND

14: CH8 IN
15: CH7 IN
16: CH6 IN
17: CH5 IN

18: CH4 IN
19: CH3 IN
20: CH2 IN
21: CH1 IN

22: GND
23: GND
24: GND
25: GND

Logical control mostly used on control outer inputs and outer outputs:
Control inputs (IN): when external control input high level to the pin of certain channel, the channel gate

will be compulsorily open; when external control input low level to the pin of certain channel, the channel
gate will be automatically tested; the gate will be open only when AF signals get through it.
Control outputs (OUT): when the microphone is open, the pin of this channel will output high level.
When the microphone is mute, the pin of this channel will output low level.

06 Operation Instructions

DAM-800 8-channel digital automatic mixer with 60-section digital potentiometer design, each digital
potentiometer can select the corresponding function.

Such as CH1, as follows

Rotate the encoder switch to adjust the volume of AF input, press the encoder switch, then LED light will
twinkle，it indicate enter menu selection mode，then rotate the encoder switch to choose corresponding
function.
For example:
The LED light is twinkle, it indicates select “on” function, then press the encoder switch again, the “on”
function is enabled. If the “on” green light is on, it indicate the priority speak mode is enabled, if the “on”
light is off, it indicates the automatic test mode is enabled.

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07 Total installations and debugging

Connect the external device and microphone, can be installation and debugging the mixer.
1、 Cascade multiple mixers simultaneously, through "S terminal cable" on the rear panel LINK IN, LINK

OUT terminal hand in hand connect. After connect the mixer, cascade function open automatically,
and then you can choose the MASTER and slave of the mix. And the audio output of slave is through
the MASTER audio output port.

2、 The 8-channel of the mixer is all select the microphone input mode, it is that the 8 channels all have

48v voltage output.

3、 Please turn the 8-channel volume to the“12 clock”position，if the 8 channels use the microphones

with different sensitivity, please turn the 8 channels’s volume to the same.

4、 Test to the channel without set prior speak, if the all 8 channels without set prior speak.

Test method: only can open the channel with input signal, it is one channel among the 8 channels.
Speak to the 8 channels one by one. The “on” LED indicate lamp on the channel with speak will
twinkle orange light.

5、 Test to the channel without set priority speak. If the channel 1,2,3 are priority speak channel.

Test method：

A. Speak to the all priority channel at the same time: the channel 1,2,3 can be speak at the same

time without restrict; The “on ” indicate lamp on the channel with speak, it will show the green light
is on.

B. Speak to the priority channel: When speak to the channel 4,5,6,7 without set priority speak,

channel 1,2,3 have priority and restrict the speak of channel 4,5,6,7 which without set prior speak.

6、 Through the above tests and sets, please turn the total volume of the mixer to the appropriate

position.
After finish the set and debugging，can select the lock function on the panel, then the button on the panel
is locked. It can prevent wrong touch after the set up is finished.

08 System Connection Diagram

DAM-800 System Connection Diagram

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09 Controller Software Installation and Use Instructions

Automatic mixer controller software is included computer control and mobile phone control. The
MASTER computer using TCP / IP connection or a mobile phone with WIFI connection, enabling
conference system remote control, remote diagnostics and upgrades.

Dedicated operating software can be downloaded from our website:
http://www.relacart.com/Download.asp

Computer controller software

Computer system ：Windows XP(32 bit 和 64 bit)，Windows Vista and Windows 7

Computer controller software
1、Computer IP setting:(The default IP address of the mixer: 192.168.1.88)

(1)Right-click The Add Network Place and select
Properties, enter the network connection,
as shown in Fig:

installation and use instructions：

(2) Right-click Local Area Connection into the
Local Area Connection Properties, as shown in
Fig:

(3) Double-click to select Internet Protocol (TCP / IP), set the computer IP address, as shown in Fig:

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2、Mixer connection with the computer - the rear panel NETWORK interface of the automatic mixer
connect with a computer network port by a network cable, turn on the DAM-800 power switch. (As shown
in Fig)

3、Software start-up and connection – decompress the downloaded software, then double click to
open the software application "RAM 1.0”.

Open the software, enter the main interface,then click System and select "Connect" to make the
software communicate with DAM-800 host . If the connect successful, the "Connect" will display
green . The operate computer interface can overall control mixer operation. If shown in gray
"Disconnect", that is to say, the connection is not successful. Please check the front steps whether have
mistakes, or restart the DAM-800 host. (As shown in Fig)

Interface display:

Connection Successful Connection is not successful

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4、Computer controller software main interface:
（1）Software main interface： （2）System setting interface:

（3）Setting EQ interface： （4）Channels setting interface：

Mobile Phone Controller Software

Mobile Phone System：Android system
Connection：Open mobile phone WIFI，connect to DAM-800 mobile phone program

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10 Technical Specifications

DAM-800 8-Channel Digital Automatic Mixer
Power Supply: 100-240V AC 50/60Hz

Power Consumption: 30W
Sampling Rate: 96kHz 24-Bit
Frequency Response: 20Hz-20KHz (± 1dB)
Total Harmonic Distortion: <0 05%
Input Impedance Mic: Mic: 2k ohms; Line: 68 ohms
Output Impedance Mic: Mic: 100 ohms; Line: 100ohms
Maximum Input Level (Gain Max): Mic:-35dBV; Line: -30 dBV
Nominal Input Level: Mic: -20dBV; Line: -10dBV
Maximum Output Level: +18 dBV
Maximum Gain: Mic: Mic:> 50dB; Line:> 20dB
Equivalent Noise: Below -120dBV
Phantom Power: 48V DC
Control Voltage Output: + 3.3V DC
Operating Temperature:
Dimensions: 410mm (W) x43mm (H) x206mm (D)
Weight: about 2.7kg
Digital Audio Output: AES
Serial Connection: RS-232
External Control Interface: EXTERNAL CONTROL
Network Interface: NETWORK

0-50℃

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