BZBGEAR BG-PS21-4K User guide

BG-PS21-4K

18G 2x1 Presentation Switcher with Soft

Codec and CEC

All Rights Reserved

User Manual

Preface

Read this user manual carefully before using the product. Pictures shown in this manual
are for reference only. Different models and specifications are subject to real product.

This manual is only for operation instruction, please contact the local distributor for
maintenance assistance. The functions described in this version were updated till April,

2019. In the constant effort to improve the product, we reserve the right to make
functions or parameters changes without notice or obligation. Please refer to the dealers
for the latest details.

FCC Statement

This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. It has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a commercial
installation.

Operation of this equipment in a residential area is likely to cause interference, in which
case the user at their own expense will be required to take whatever measures may be
necessary to correct the interference.

Any changes or modifications not expressly approved by the manufacture would void
the user’s authority to operate the equipment.

SAFETY PRECAUTIONS

To ensure the best from the product, please read all instructions carefully before using
the device. Save this manual for further reference.

Unpack the equipment carefully and save the original box and packing material for

possible future shipment.

Follow basic safety precautions to reduce the risk of fire, electrical shock and injury

to persons.

Do not dismantle the housing or modify the module. It may result in electrical shock

or burn.

Using supplies or parts not meeting the products’ specifications may cause damage,

deterioration or malfunction.

Refer all servicing to qualified service personnel.
To prevent fire or shock hazard, do not expose the unit to rain, moisture or install this

product near water.

Do not put any heavy items on the extension cable in case of extrusion.
Do not remove the housing of the device as opening or removing housing may

expose you to dangerous voltage or other hazards.

Install the device in a place with fine ventilation to avoid damage caused by

overheat.

Keep the module away from liquids.
Spillage into the housing may result in fire, electrical shock, or equipment damage. If

an object or liquid falls or spills on to the housing, unplug the module immediately.

Do not twist or pull by force ends of the optical cable. It can cause malfunction.
Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power to

the device before cleaning.

Unplug the power cord when left unused for a long period of time.
Information on disposal for scrapped devices: do not burn or mix with general

household waste, please treat them as normal electrical wastes.

Table of Contents

1. Product Introduction .................................................................................................... 1

1.1 Features ............................................................................................................. 1

1.2 Package List ....................................................................................................... 2

2. Specification ................................................................................................................ 3

3. Panel Description ........................................................................................................ 5

3.1 Front Panel ......................................................................................................... 5

3.2 Rear Panel ......................................................................................................... 6

4. System Connection ..................................................................................................... 7

4.1 Usage Precaution ............................................................................................... 7

4.2 System Diagram ................................................................................................. 7

5. Button Control.............................................................................................................. 8

5.1 Manual Switching ............................................................................................... 8

5.2 Automatic Switching ........................................................................................... 8

5.3 Display Control ................................................................................................... 8

5.4 EDID Setting ...................................................................................................... 9

6. RS232 Control ........................................................................................................... 10

6.1 RS232 Control Software .................................................................................. 10

6.2 RS232 Command ............................................................................................. 12

6.2.1 Device Control........................................................................................ 12

6.2.2 Source Switching ................................................................................... 12

6.2.3 User-defined EDID ................................................................................. 13

6.2.4 Switcher Baud Rate Setting ................................................................... 13

6.2.5 CEC/RS232 Function Setting................................................................. 14

6.2.6 Display Control ....................................................................................... 15

6.2.7 Third-party Device Control ..................................................................... 16

7. Panel Drawing ........................................................................................................... 21

8. Troubleshooting & Maintenance ................................................................................ 22

9. Customer Service ...................................................................................................... 23

10. Second Year Assurance .......................................................................................... 24

11. Mission Statement ................................................................................................... 25

1

1. Product Introduction

Thanks for choosing the HDMI 2.0 2x1 Presentation Switcher. The switcher is designed
to switch HDMI input or USB-C input to one HDMI output. It supports video resolution up
to 4Kx2K@60Hz 4:4:4 8bit, 1080P, and 3D. In addition, there is smart built-in EDID
setting can be selected by the 4-pin DIP switch on the front panel.

The switcher supports stereo and multichannel audio on the HDMI inputs. In addition to
the audio embedded in the HDMI output stream, the audio is simultaneously
de-embedded to a balanced analog audio output. It also supports device extension by
providing one type-B USB port for host connection, and two type-A USB ports for HID
devices such as camera, microphone, keyboard etc.

The switcher features multiple methods of control. When in the AUTO mode, the
switcher will automatically switch to the first detected source device. When the active
source is removed, the switcher will switch to the lowest numbered input. The switcher
can be manually controlled by the front panel buttons and RS232 command. CEC
allows the display device can be controlled by the front panel buttons and RS232 CEC
commands.

1.1 Features

18G 2x1 switcher with HDMI and USB-C inputs.
Supports automatic switching.
Controllable via front panel buttons and RS232.
Supports HDMI 2.0, 4Kx2K@60Hz 4:4:4, HDR 10, Dolby Vision, HDCP 2.2.
Provides charging on USB-C port up to 40W.
Provides USB data (USB 3.0/2.0) and 4K video transmission on USB-C port.
Balanced analog audio for audio de-embedding.
Peripheral units (e.g. microphone and camera) can be connected by type-A USB

(USB 3.0/2.0) ports and automatically switched along with HDMI and USB-C input
as USB DEVICES for corresponding HOST.

Smart EDID management capable for various applications and customized setting.
Front panel buttons trigger both CEC and RS232 commands for display control. (ON,

OFF, MUTE, VOL+, VOL -).

2

1.2 Package List

1x BG-PS21-4K 18G 2x1 Presentation Switcher
2x Mounting Ears with 4 Screws
4x Plastic Cushions
1x 5-pin Terminal Block
1x RS232 Cable (3-pin terminal block to DB9)
1x Power Cord
1x Power Adapter (24V DC, 2.71A)
1x User Manual

Note: Please contact your distributor immediately if any damage or defect in the
components is found.

3

2. Specification

Video

Video Input

(1) HDMI, (1) USB-C

Video Input Connector

(1) Type-A female HDMI, (1) Type-C USB

HDMI Input Resolution

Up to 4Kx2K@60Hz 4:4:4 8bit

USB-C Input Resolution

Up to 4Kx2K@30Hz 4:4:4

Video Output

(1) HDMI

Video Output Connector

(1) Type-A female HDMI

HDMI Output Resolution

Up to 4Kx2K@60Hz 4:4:4 8bit

HDMI Version

2.0

HDCP Version

2.2

USB Version

3.0

HDR 10

Supported

CEC

Supported

HPD

Supported

Audio

Audio Output

(1) AUDIO OUT (Stereo balanced L/R)

Audio Output Connector

(1) 5-pin terminal block

HDMI Audio Format

LPCM 7.1 audio, Dolby Atmos®, Dolby® TrueHD, Dolby Digital®
Plus, DTS: X™, and DTS-HD® Master Audio™ pass-through

Stereo balanced L/R audio Format

PCM

Max Output Level

2.0Vrms ± 0.5dB. 2V = 16dB headroom above -10dBV (316mV)
nominal consumer line level signal

THD+N

<0.05% (-80dB), 20Hz ~ 20KHz bandwidth, 1KHz sine at 0dBFS
level (or max level)

SNR

>80dB, 20Hz ~ 20KHz bandwidth

Crosstalk Isolation

>70dB, 10KHz sine at 0dBFS level (or max level before clipping)

L-R Level Deviation

< 0.3dB, 1KHz sine at 0dBFS level (or max level before clipping)

Frequency Response Deviation

<±0.5dB 20Hz ~ 20KHz

Output Load Capability

1KΩ and higher (supports 10x paralleled 10KΩ loads)

Stereo Channel Separation

>70dB@1KHz

Control Part

Control

(1) EDID, (1) FW, (1) RS232, (1) HOST, (2) DEVICE

Control Connector

(1) 4-pin DIP switch, (1) Micro-USB, (1) 3-pin terminal block, (1)
Type-B USB 3.0, (2) Type-A USB 3.0

General

HDMI 2.0 Cable Length

4K@60Hz 4:4:4 ≤ 5m,

4K@60Hz 4:2:0 ≤ 10m,
1080P ≤ 15m

4

Bandwidth

18Gbps

Operation Temperature

-10℃ ~ +55℃

Storage Temperature

-25℃ ~ +70℃

Relative Humility

10% ~ 90%

External Power Supply

Input: AC 100~240V, 50/60Hz, Output: 24V DC 2.71A

Power Consumption

54W (Max)

Dimension (W*H*D)

168.0mm x 24.5mm x 95.0mm

Net Weight

245g

5

3. Panel Description

3.1 Front Panel

① Power LED: The LED illuminates red when the device is power on.
② INPUT:

A. HDMI: The LED illuminates green when the HDMI input is selected in AUTO

mode, or illuminates orange when the HDMI input is selected in manual mode.

B. USB-C: The LED illuminates green when the USB-C input is selected in AUTO

mode, or illuminates orange when the USB-C input is selected in manual mode.

C. SELECT AUTO/3s: Press the button to select the next input source, or press

and hold the button at least 3 seconds to enable auto switching mode. Note that
the factory default switching mode is AUTO.

③ DISPLAY:

A. Press ON to turn on the display.
B. Press OFF to turn off the display.

C. Press to mute/unmute display audio.
D. Press to decrease the audio volume gradually, or press and hold it to

decrease the audio volume constantly.

E. Press to increase the audio volume gradually, or press and hold it to

increase the audio volume constantly.

④ EDID: 4-pin DIP switch for EDID setting.
⑤ FW: Micro-USB port for firmware upgrade.

FW

EDID

ON

OFF

1
0

1 2 3 4

OFFONHDMI USB-C

SELECT
AUTO/3s

INPUT

DISPLAY

1

2

A A

B B

C C

D

E

3

4

5

6

3.2 Rear Panel

① HDMI IN: Type-A female HDMI input port to connect HDMI video source.
② USB-C IN: Type-C USB with charging capability to connect the Macbook or other

device with SlimPort output.

Note: The USB 3.0 cable is recommended to be used to ensure optimal machine
performance.

③ HDMI OUT: Type-A female HDMI output port to connect video display.
④ AUDIO OUT: 5-pin terminal block for balanced audio output.
⑤ RS232: 3-pin terminal block to connect control device (e.g. PC) or third-party

device for RS232 control.

⑥ HOST: Type-B USB ports for host connection.
⑦ DEVICES: Two type-A USB ports to connect HID devices (e.g. microphone and

camera). The HID devices are used to control the HOST when the HDMI input has
been selected, or to control the USB-C source device (e.g. Macbook) when the
USB-C input has been selected.

⑧ DC 24V: DC barrel port for power adapter connection.

HDMI IN USB-C IN HDMI OUT AUDIO OUT DEVICES

1 2

RS232 HOST

L R

Tx Rx

DC 24V

1

2

3

4

5

6

7

8

7

4. System Connection

4.1 Usage Precaution

Make sure all components and accessories included before installation.
System should be installed in a clean environment with proper temperature and

humidity.

All of the power switches, plugs, sockets, and power cords should be insulated and

safe.

All devices should be connected before power on.

4.2 System Diagram

8

5. Button Control

5.1 Manual Switching

When the switcher is in the manual switching mode, press the SELECT AUTO/3s button
repeatedly to cycle through the two video inputs, and the corresponding source LED
illuminates orange immediately.

5.2 Automatic Switching

Press and hold the SELECT AUTO/3s button at least three seconds to enable
automatic switching. The current input source will not be changed, and its source LED
will turns green.

When in the AUTO mode, the switcher will switch according to the following rules:

Press and hold the SELECT AUTO/3s button at least three seconds again can exit

AUTO mode, but the input source will not be changed, and the corresponding source
LED will turns orange.

New input: Upon detecting a new input, the switcher will automatically select the new

input.

Press the SELECT AUTO/3s button also can forcibly change the input source.
Reboot: Once power is restored to the switcher, it will automatically reconnect the

input before powered off.

Source removed: When an active source is removed, the switcher will switch to the

other active input.

5.3 Display Control

Manual Control: Press the below DISPLAY buttons on the front panel to

simultaneously send RS232 and CEC commands to control the display device.

ON: Display On.
OFF: Display Off.

: Mute/unmute display audio.
: Volume down display audio.

: Volume up display audio.

Auto Control: When detecting a video input signal (5V or TMDS), automatically send
CEC and RS232 commands to turn on the display device. When not detecting any video

9

signal within the setting time (default 10mins), automatically send RS232 and CEC
commands to turn off the display device.

The RS232 command can be set by sending commands, please refer to the 6.2.7

Third-party Device Control for more details.

5.4 EDID Setting

The Extended Display Identification Data (EDID) is used for the source device to match
its video resolution with the connected display. By default, the source device obtains its
EDID from the first connected display. Meanwhile, since the displays with different
capabilities are connected to the switcher, the 4-pin DIP switch on the front panel can be
used to set the EDID to a built-in fixed value. Use the following table to determine the
setting for the 4-pin DIP switch for specific video resolution and audio capabilities.

The switch represents “0” when in the lower (OFF) position, and it represents “1” while

putting the switch in the upper (ON) position.

Switch Status

Video Resolution

Audio Format

0000 (Default)

EDID pass-through

0001

1280x720@60Hz RGB 4:4:4

Stereo

0010

1920x1080@60Hz

DVI

0011

1920x1080@60Hz 2D

PCM 2.0

0100

1920x1080@60Hz RGB 4:4:4

Stereo

0101

1920x1080@60Hz RGB 4:4:4

High Definition

0110

1920x1200@60Hz RGB 4:4:4

Stereo

0111

3840x2160@60Hz RGB 4:2:0 HDR

Stereo

1000

3840x2160@60Hz RGB 4:2:0 HDR

High Definition

1001

3840x2160@60Hz RGB 4:4:4

Stereo

1010

3840x2160@60Hz RGB 4:4:4

High Definition

1011

User-defined EDID (Please refer to the 6.2.3 User-defined EDID)

1100

1101

1110

1111

Note: The EDID DIP switch only used for setting the EDID of HDMI source device, and
the USB-C source device will automatically gains the EDID of display device.

10

6. RS232 Control

Connect the RS232 port to control device (e.g. PC) with RS232 cable. The switcher can
be controlled by sending RS232 commands.

6.1 RS232 Control Software

Installation: Copy the control software file to the control PC.
Uninstallation: Delete all the control software files in corresponding file path.

Basic Setting:

Connect the switcher with all input devices and output devices needed, then to connect
it with a PC which is installed with RS232 control software. Double-click the software
icon to run this software.

Here take the software CommWatch.exe as an example:

11

The main view is shown as below:

Please set the parameters of COM number, bound rate, data bit, stop bit and the parity
bit correctly, and then you are able to send command in command sending area.

Parameter configuration area

Monitoring area, show the commands
and its feedback information.

Command sending area

Operation area

12

6.2 RS232 Command

Communication protocol: RS232 Communication Protocol

Baud rate: 9600 Data bit: 8 Stop bit: 1 Parity bit: none

Note:

All commands need to be ended with “<CR><LF>”.
In the commands, “[”and “]” are symbols for easy reading and do not need to be

typed in actual operation.

Type the command carefully, it is case-sensitive.

6.2.1 Device Control

Command

Description

Command & Feedback
Example

#GET_FIRMWARE_VER
SION

Get the firmware version.

@V1.0.0

#FACTORY_RESET

Factory reset.

@FACTORY_RESET

#REBOOT

System reboot

@REBOOT

#HELP

Get the command details.

Example: #HELP SET_AV
Feedback:
@SELECT VIDEO AND
AUDIO INPUT PORT
#SET_AV PARAM1
PARAM1=H,C
H - HDMI
C - TYPE-C

6.2.2 Source Switching

Command

Description

Command & Feedback
Example

#SET_AV H

Switch to HDMI input.

@AV H

#SET_AV C

Switch to USB-C input.

@AV C

#GET_AV

Get the current input source.
@AV H

@AV C

#SET_AUTO_SWITCH 1

Enable auto switching mode.

@AUTO_SWITCH 1

#SET_AUTO_SWITCH 0

Disable auto switching mode.

@AUTO_SWITCH 0

#GET_AUTO_SWITCH

Get the auto switching status.
@AUTO_SWITCH 1

@AUTO_SWITCH 0

13

6.2.3 User-defined EDID

There are five EDID values can be customized by sending the below command.

Command

Function & Operation

#UPLOAD_USER_EDID
[PARAM].

[PARAM]=1~5, represents the EDID, its DIP switch status shows as below:

[PARAM]

DIP Switch Status

1

1011 2 1100

3

1101

4

1110 5 1111

Operation:
Step 1: Prepare the EDID file (.bin).
Step 2: Set the 4-pin DIP switch status, for example: “1011”.
Step 3: Send the command “#UPLOAD_USER_EDID 1.”, and the feedback
is “@USER_EDID 1 READY
PLEASE SEND EDID DATA IN 10S”.
Step 4: Send the EDID file (.bin). If successfully upload, the feedback is:
“OK”.

6.2.4 Switcher Baud Rate Setting

Command

Description

Command & Feedback
Example

#SET_RS232_BAUD 0

Set the RS232 baud rate to 115200.

@RS232_BAUD 0

#SET_RS232_BAUD 1

Set the RS232 baud rate to 57600.

@RS232_BAUD 1

#SET_RS232_BAUD 2

Set the RS232 baud rate to 38400.

@RS232_BAUD 2

#SET_RS232_BAUD 3

Set the RS232 baud rate to 19200.

@RS232_BAUD 3

#SET_RS232_BAUD 4

Set the RS232 baud rate to 9600.

@RS232_BAUD 4

#SET_RS232_BAUD 5

Set the RS232 baud rate to 4800.

@RS232_BAUD 5

#SET_RS232_BAUD 6

Set the RS232 baud rate to 2400.

@RS232_BAUD 6

#GET_RS232_BAUD

Get the RS232 baud rate.

@RS232_BAUD 0

@RS232_BAUD 1

@RS232_BAUD 2

@RS232_BAUD 3

@RS232_BAUD 4

@RS232_BAUD 5

@RS232_BAUD 6

14

6.2.5 CEC/RS232 Function Setting

The ending mark of command is “<CR><LF>”.

Command

Description

Command & Feedback
Example

#SET_SYNCACT_CEC 1

Enable the function of automatically sending
CEC commands.
When detecting video input signal or not
detecting any video signal, the switcher will
automatically send the corresponding CEC
command to control the display device.

@SYNCACT_CEC 1

#SET_SYNCACT_CEC 0

Disable the function of automatically sending
CEC commands.

@SYNCACT_CEC 0

#GET_SYNCACT_CEC

Get the function setting status of
automatically sending CEC commands.

@SYNCACT_CEC 1

#SET_SYNCACT_RS232
1

Enable the function of automatically sending
RS232 commands.
When detecting video input signal or not
detecting any video signal, the switcher will
automatically send the corresponding RS232
command to control the display device.

@SYNCACT_RS232 1

#SET_SYNCACT_RS232
0

Disable the function of automatically sending
RS232 commands.

@SYNCACT_RS232 0

#GET_SYNCACT_RS232

Get the function setting status of
automatically sending RS232 commands.

@SYNCACT_RS232 1

#SET_DTIME
[PARAM1]: [PARAM2]

When not detecting video input signal, set the
auto power-off time of display device to
[PARAM1]: [PARAM2]. The default time is 10
minutes.
[PARAM1]=0~30 minutes.
[PARAM2]=0~1800 seconds.

#SET_DTIME 1:30

@DTIME 1:30

#GET_DTIME

Get the auto power-off time of display device.

@DTIME 30:0

15

6.2.6 Display Control

Command

Description

Command & Feedback
Example

#SET_AUDIO_MUTE

Mute/unmute the display audio through
CEC and RS232 channels.

@AUDIO_MUTE_UNMUTE

#SET_VOL +

Increase the display audio through CEC
and RS232 channels.

@VOL -

#SET_VOL -

Decrease the display audio through CEC
and RS232 channels.

@VOL +

#SET_DISPLAY 1

Power on display device (Simultaneously
sending CEC and RS232 commands to
display device).

@DISPLAY 0

#SET_DISPLAY 0

Power off display device (Simultaneously
sending CEC and RS232 commands to
display device).

@DISPLAY 1

16

6.2.7 Third-party Device Control

Connect a third-party device (e.g. projector) to the RS232 port of switcher, the
third-party device can be controlled simultaneously by the below RS232 commands
while press the front panel button (ON, OFF, MUTE, VOLUME + or VOLUME -).

Note: The below commands don’t need ending mark.

Command

Description

Command & Feedback
Example

#SET_ON_[PARAM1]_
[PARAM2]:XXXX

Set the ASCII RS232 command XXXX to
be sent to control the third-party device
when the DISPLAY ON button is
pressed.

[PARAM1] = 00~06 (Baud Rate)

00 - 115200
01 - 57600
02 - 38400
03 - 19200
04 - 9600
05 - 4800
06 - 2400

[PARAM2] = 00~99. The delay time

of sending command.

XXXX: Any ASCII code (up to 48

bytes).

#SET_ON_05_30:1234567

@BAUDRATE: 4800
@DELAY TIME: 30 s
@DISPLAY ON TO
SEND:1234567

#SET_H_ON_[PARAM1]_
[PARAM2]:XX XX

Set the HEX RS232 command XX XX to
be sent to control the third-party device
when the DISPLAY ON button is
pressed.

[PARAM1] = 00~06 (Baud Rate)

00 - 115200
01 - 57600
02 - 38400
03 - 19200
04 - 9600
05 - 4800
06 - 2400

[PARAM2] = 00~99. The delay time

of sending command.

XX XX: Any HEX code (0-9, A-F; up

to 20 bytes. It must have a blank
between 2 different XX).

#SET_H_ON_05_30:31 32
33 34 35

@BAUDRATE: 4800
@DELAY TIME: 30 s
@DISPLAY ON HEX TO
SEND:31 32 33 34 35

17

Command

Description

Command & Feedback
Example

#SET_OF_[PARAM1]_
[PARAM2]:XXXX

Set the ASCII RS232 command XXXX to
be sent to control the third-party device
when the DISPLAY OFF button is
pressed.

[PARAM1] = 00~06 (Baud Rate)

00 - 115200
01 - 57600
02 - 38400
03 - 19200
04 - 9600
05 - 4800
06 - 2400

[PARAM2] = 00~99. The delay time

of sending command.

XXXX: Any ASCII code (up to 48

bytes).

#SET_OF_05_30:ABCDEFG

@BAUDRATE: 4800
@DELAY TIME: 30 s
@DISPLAY OFF TO

SEND:ABCDEFG

#SET_H_OF_[PARAM1]_
[PARAM2]:XX XX

Set the HEX RS232 command XX XX to
be sent to control the third-party device
when the DISPLAY OFF button is
pressed.

[PARAM1] = 00~06 (Baud Rate)

00 - 115200
01 - 57600
02 - 38400
03 - 19200
04 - 9600
05 - 4800
06 - 2400

[PARAM2] = 00~99. The delay time

of sending command.

XX XX: Any HEX code (0-9, A-F; up

to 20 bytes. It must have a blank
between 2 different XX).

#SET_H_OF_05_30:41 42
43 44 45

@BAUDRATE: 4800
@DELAY TIME: 30 s
@DISPLAY OFF HEX TO

SEND:41 42 43 44 45

18

Command

Description

Command & Feedback
Example

#SET_AM_[PARAM1]_
[PARAM2]:XXXX

Set the ASCII RS232 command XXXX to
be sent to control the third-party device
when the VOLUME MUTE button is
pressed.

[PARAM1] = 00~06 (Baud Rate)

00 - 115200
01 - 57600
02 - 38400
03 - 19200
04 - 9600
05 - 4800
06 - 2400

[PARAM2] = 00~99. The delay time

of sending command.

XXXX: Any ASCII code (up to 48

bytes).

#SET_AM_05_30:ABCDEFG

@BAUDRATE: 4800
@DELAY TIME: 30 s
@VOLUME MUTE TO

SEND:ABCDEFG

#SET_H_AM_[PARAM1]_
[PARAM2]:XX XX

Set the HEX RS232 command XX XX to
be sent to control the third-party device
when the VOLUME MUTE button is
pressed.

[PARAM1] = 00~06 (Baud Rate)

00 - 115200
01 - 57600
02 - 38400
03 - 19200
04 - 9600
05 - 4800
06 - 2400

[PARAM2] = 00~99. The delay time

of sending command.

XX XX: Any HEX code (0-9, A-F; up

to 20 bytes. It must have a blank
between 2 different XX).

#SET_H_AM_05_30:31 32
33 34 35

@BAUDRATE: 4800
@DELAY TIME: 30 s
@VOLUME MUTE HEX TO

SEND:31 32 33 34 35

19

Command

Description

Command & Feedback
Example

#SET_AU_[PARAM1]_
[PARAM2]:XXXX

Set the ASCII RS232 command XXXX to
be sent to control the third-party device
when the VOLUME UP button is
pressed.

[PARAM1] = 00~06 (Baud Rate)

00 - 115200
01 - 57600
02 - 38400
03 - 19200
04 - 9600
05 - 4800
06 - 2400

[PARAM2] = 00~99. The delay time

of sending command.

XXXX: Any ASCII code (up to 48

bytes).

#SET_AU_05_30:ABCDEFG

@BAUDRATE: 4800
@DELAY TIME: 30 s
@VOLUME + TO

SEND:ABCDEFG

#SET_H_AU_[PARAM1]_
[PARAM2]:XX XX

Set the HEX RS232 command XX XX to
be sent to control the third-party device
when the VOLUME UP button is
pressed.

[PARAM1] = 00~06 (Baud Rate)

00 - 115200
01 - 57600
02 - 38400
03 - 19200
04 - 9600
05 - 4800
06 - 2400

[PARAM2] = 00~99. The delay time

of sending command.

XX XX: Any HEX code (0-9, A-F; up

to 20 bytes. It must have a blank
between 2 different XX).

#SET_H_AU_05_30:31 32
33 34 35

@BAUDRATE: 4800
@DELAY TIME: 30 s
@VOLUME + HEX TO

SEND:41 42 43 44 45

20

Command

Description

Command & Feedback
Example

#SET_AD_[PARAM1]_
[PARAM2]:XXXX

Set the ASCII RS232 command XXXX to
be sent to control the third-party device
when the VOLUME DOWN button is
pressed.

[PARAM1] = 00~06 (Baud Rate)

00 - 115200
01 - 57600
02 - 38400
03 - 19200
04 - 9600
05 - 4800
06 - 2400

[PARAM2] = 00~99. The delay time

of sending command.

XXXX: Any ASCII code (up to 48

bytes).

#SET_AD_05_30:ABCDEFG

@BAUDRATE: 4800
@DELAY TIME: 30 s
@VOLUME - TO

SEND:ABCDEFG

#SET_H_AD_[PARAM1]_
[PARAM2]:XX XX

Set the HEX RS232 command XX XX to
be sent to control the third-party device
when the VOLUME DOWN button is
pressed.

[PARAM1] = 00~06 (Baud Rate)

00 - 115200
01 - 57600
02 - 38400
03 - 19200
04 - 9600
05 - 4800
06 - 2400

[PARAM2] = 00~99. The delay time

of sending command.

XX XX: Any HEX code (0-9, A-F; up

to 20 bytes. It must have a blank
between 2 different XX).

#SET_H_AD_05_30:41 42
43 44 45

@BAUDRATE: 4800
@DELAY TIME: 30 s
@VOLUME - HEX TO

SEND:41 42 43 44 45

21

7. Panel Drawing

FW

EDID

ON

OFF

1
0

1 2 3 4

OFFONHDMI USB-C

SELECT
AUTO/3s

INPUT

DISPL AY

18G 2x1 Presentation Switcher w/ Soft Codec & CEC

HDMI IN USB-C IN HDMI OUT AUDIO OUT DEVICES

1 2

RS232 HOST

L R

Tx Rx

DC 24V

168.0mm

24.5 mm

95.0 mm

22

8. Troubleshooting & Maintenance

Problems

Potential Causes

Solutions

Output image with
snowflake

Bad quality of the
connecting cable.

Try another high quality
cable.

Fail or loose connection.

Make sure the connection
is good

No output image when
switching

No signal at the input /
output end.

Check with oscilloscope or
multimeter if there is any
signal at the input/ output
end.

Fail or loose connection.

Make sure the connection
is good.

The switcher is broken.

Send it to authorized
dealer for repairing.

POWER indicator doesn’t
work or no respond to any
operation

Fail connection of power
cord.

Make sure the power cord
connection is good.

Static becomes stronger
when connecting the video
connectors

Bad grounding.

Check the grounding and
make sure it is connected
well.

Cannot control the device
by control device (e.g. a
PC) through RS232 port

Wrong RS232
communication
parameters.

Type in correct RS232
communication
parameters.

Broken RS232 port.

Send it to authorized
dealer for checking.

Note: If your problem still remaining after following the above troubleshooting steps,
please contact your local dealer or distributor for further assistance.

23

9. Customer Service

The return of a product to our Customer Service implies the full agreement of the terms
and conditions hereinafter. There terms and conditions may be changed without prior
notice.

1) Warranty
The limited warranty period of the product is one year.

2) Scope
These terms and conditions of Customer Service apply to the customer service
provided for the products or any other items sold by authorized distributor only.

3) Warranty Exclusion

Warranty expiration.
Factory applied serial number has been altered or removed from the product.
Damage, deterioration or malfunction caused by:

Normal wear and tear.
Use of supplies or parts not meeting our specifications.
No certificate or invoice as the proof of warranty.
The product model showed on the warranty card does not match with the

model of the product for repairing or had been altered.
Damage caused by force majeure.
Servicing not authorized by distributor.
Any other causes which does not relate to a product defect.

Shipping fees, installation or labor charges for installation or setup of the product.

4) Documentation
Customer Service will accept defective product(s) in the scope of warranty coverage
at the sole condition that the defeat has been clearly defined, and upon reception of
the documents or copy of invoice, indicating the date of purchase, the type of
product, the serial number, and the name of distributor.

Remarks: Please contact your local distributor for further assistance or solutions.

24

10. Second Year Assurance

BZBGEAR wants to assure you peace of mind. We're so confident in the quality of our
products that along with the manufacturer's one-year limited warranty, we are offering
free second-year warranty coverage upon registration*!

Taking advantage of this program is simple, just follow the steps below:

1. Register your product within 90 days of purchase by visiting BZBGEAR.com/warranty.

2. Complete the registration form. Provide all necessary proof of purchase details,

including serial number and a copy of your sales receipt.

For questions, please call 1.888.660.2962 or email [email protected].

For complete warranty information, please visit BZBGEAR.com/warranty or scan the QR
code below.

*Terms and conditions apply. Registration is required.

25

11. Mission Statement

BZBGEAR manifests from the competitive nature of the audiovisual industry to innovate
while keeping the customer in mind. AV solutions can cost a pretty penny, and new
technology only adds to it. We believe everyone deserves to see, hear, and feel the
advancements made in today’s AV world without having to break the bank. BZBGEAR is
the solution for small to medium-sized applications requiring the latest professional
products in AV.

We live in a DIY era where resources are abundant on the internet. With that in mind,
our team offers system design consultation and expert tech support seven days a week
for the products in our BZBGEAR catalog. You’ll notice comparably lower prices with
BZBGEAR solutions, but the quality of the products is on par with the top brands in the
industry. The unparalleled support from our team is our way of showing we care for
every one of our customers. Whether you’re an integrator, home theater enthusiast, or a
do-it-yourselfer, BZBGEAR offers the solutions to allow you to focus on your project and
not your budget.