IDK IMP-400UHD Operating manual

4K＠60 and HDCP2.2 supported 4 x 1 HDMI Switcher
IMP-400UHD
<Command Reference Guide>
Ver.1.0.0
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IMP-400UHD Command Guide
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trademarks of their respective owners. In this manual, the “®” or “™” marks may not be specified.

IMP-400UHD Command Guide
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Before reading this manual
●All rights reserved.
●Some of the contents in this user’s guide such as the appearance of diagrams, menu operations,
communication commands, and so on may differ between products depending on the specific version.
●This Command guide is subject to change without notice. You can download the latest version from IDK’s
website at: http: //www.idkav.com

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Table of Contents
1About this Guide.................................................................................................................................... 5
2Specification and Setup of Communication............................................................................................ 6
2.1 RS-232C communication..................................................................................................................6
2.1.1 RS-232C connector specification.............................................................................................. 6
2.1.2 RS-232C communication specification...................................................................................... 6
2.1.3 Setting up RS-232C communication......................................................................................... 7
2.2 LAN communication .........................................................................................................................8
2.2.1 LAN connector specification..................................................................................................... 8
2.2.2 LAN communication specification............................................................................................. 8
2.2.3 Setting up LAN communication................................................................................................. 9
2.2.4 The number of TCP-IP connections.........................................................................................10
3Command............................................................................................................................................11
3.1 Command outline...........................................................................................................................11
3.2 Command list.................................................................................................................................12
3.3 Detailed description........................................................................................................................14
3.3.1 Error status.............................................................................................................................14
3.3.2 Selecting input channel ...........................................................................................................14
3.3.3 Input setting............................................................................................................................15
3.3.4 Switching setting.....................................................................................................................16
3.3.5 Output settings........................................................................................................................21
3.3.6 Audio setting...........................................................................................................................22
3.3.7 Contact input...........................................................................................................................23
3.3.8 EDID.......................................................................................................................................24
3.3.9 RS-232C communication.........................................................................................................29
3.3.10 LAN communication................................................................................................................30
3.3.11 Startup settings.......................................................................................................................32
3.3.12 Other settings..........................................................................................................................33
3.3.13 Displaying status.....................................................................................................................34

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1 About this Guide
This guide contains information of communication commands that control the IMP-400UHD via RS-232C or
LAN communication.
The IMP-400UHD is a 4x1 HDMI signal switcher supporting 4K@60 video signal and HDCP2.2.
Digital audio signal is converted into analog and output from the AUDIO OUTPUT connector.
EDID emulator
IMP-400UHD
Analog audo
L/R Balanced / Unbalanced
Output
1
Up to 98.4 ft. (30 m)*
Digital video/audio
HDMI DVI Inputs
4
Digital video/audio
HDMI DVI Output
1
Video・Audio
switch
*Maximum cable distance
1080p@60: up to 98.4 ft. (30 m)
4K@60: up to 39.4 ft. (12 m) when 18 Gbps high-speed transmission cable is used.
Video / Audio
Audio
D/A
conversion
Up to 98.4 ft. (30 m)*
[Figure 1.1] Diagram

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2 Specification and Setup of Communication
2.1 RS-232C communication
2.1.1 RS-232C connector specification
Connect the RS-232C cable to the provided 3-pin terminal block, and then insert it to the RS-232C connector.
AWG28 to AWG16 conductor gauge is recommended for optimal performance.
The recommended wire strip length is 7 mm/0.28 inch.
If connecting to the D-sub9, please short RTS, CTS, DTR, and DSR.
Tx
Rx
GND
RS-232C Tｘ
RS-232C Rx
GND
Up to 0.28 in. (7 mm)
[Figure 2.1] Connecting RS-232C cable to 3-pin terminal block connector
2.1.2 RS-232C communication specification
[Table 2.1] RS-232C specification
Standard
RS-232C
Baud rate [bps]
4800 / 9600 / 19200 / 38400 [bps]
Data bit length [bit]
7 / 8
Parity check
NONE, EVEN, ODD
Stop bit [bit]
1 / 2
X parameter
Invalid
Flow control
None
Delimiter
CR LF (Carriage return and line feed, 0D and 0A in hex)
Communication method
Full duplex

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2.1.3 Setting up RS-232C communication
Follow the procedure below to set RS-232C communication between the IMP-400UHD and control devices.
(1) Connect the IMP-400UHD and the control device via an appropriate cable.
(2) Set the RS-232C communication as follows:
・RS-232C communication: Baud rate, data bit length, parity check, and stop bit
【Reference: User’s Guide】
(3) For the control device, set the same values in the same way as RS-232C communication (baud rate, data
bit length, parity check, and stop bit) in step (2) above.
(4) Send a communication command from the control device to the IMP-400UHD in order to check the control
status of the IMP-400UHD.
Step (3)
Laptop Step (2)
Step (1)
RS-232C cable
Step (4)
Communication
command
(Control command)
[Figure 2.2] RS-232C communication
■RS-232C communication operation example
Laptop
RS-232C cable
Controlling IMP-400UHD via
communication command
[Figure 2.3] Operation example: RS-232C communication

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2.2 LAN communication
2.2.1 LAN connector specification
The IMP-400UHD supports Auto MDI/MDI-X, which distinguishes/switches straight and cross cables
automatically.
Pin assignments of LAN connector:
81
LAN connector
8-pin RJ-45 connector
(Rear panel)
Illuminates green while link is established.
Blinks green while data is being sent/received. Illuminates orange if the send/receive rate is 100 Mbps.
Goes off if it is 10 Mbps.
RX+: Received Data+
N.C: Not connected
TX+: Transmitted Data+
Pin #
1
3
2
4
6
5
7
Signal Name
TX-: Transmitted Data-
N.C: Not connected
RX-: Received Data-
N.C: Not connected
N.C: Not connected
MDI
TX+: Transmitted Data+
N.C: Not connected
RX+: Received Data+
RX-: Received Data-
N.C: Not connected
TX-: Transmitted Data-
N.C: Not connected
N.C: Not connected
MDI-X
8
[Figure 2.4] LAN connector specification
2.2.2 LAN communication specification
[Table 2.2] Specification of LAN communication
Physical layer
10BASE-T (IEEE802.3i)/100Base-TX (IEEE802.3u)
Network layer
ARP, IP, ICMP
Transport layer
TCP
Port used for command control: 23, 1100, 6000 to 6999
Application layer
HTTP, TELNET
Note: Up to 7 connections can be used simultaneously.

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2.2.3 Setting up LAN communication
Follow the procedure below to set LAN communication between the IMP-400UHD and control devices.
(1) Connect the IMP-400UHD and the control device via a LAN cable.
(2) Set up LAN communication as follows:
・Set IP address and subnet mask
・TCP pot number: 23, 1100, 6000 to 6999
【Reference: User’s Guide】
(3) Establish the connection from the control device to the IP address and TCP port that are set to the
IMP-400UHD in step (2) above.
(4) Send a communication command from the control device to the IMP-400UHD in order to check the
control status of the IMP-400UHD.
Step (3)
Laptop
Step (2)
Step (1)
LAN cable
Step (4)
Communication
command
(Control device)
[Figure 2.5] Control via LAN communication
■LAN communication operation example
Laptop LAN cable
Controlling IMP-400UHD via
communication command
[Figure 2.6] Operation example: LAN communication

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2.2.4 The number of TCP-IP connections
The IMP-400UHD series can connect up to seven connections (seven ports) simultaneously. If the
IMP-400UHD is controlled from eight or more PCs, they may not be connected to the IMP-400UHD, since the
number of connections that can be used is limited.
If you use eight connections or more, execute TCP-IP connection/close every time the communication
command is sent or received from the software of user’s side. It makes IMP-400UHD’s ports occupied or
released so that eight or more connections can be connected logically.
[Table 2.3] Increasing connections
Your PC’s software
IMP-400UHD
TCP-IP connection
→
(Occupied by 1 port)
Send command (@xxx)
→
←
Send back command (@xxx)
TCP-IP close
→
(Release 1 port)
Note:
If any command is not sent from the PC side to the IMP-400UHD for 30 seconds, the IMP-400UHD
disconnects the connection to avoid the limitation problem on the number of connections. As a result,
connection needs to be established again from the PC side after the current connection of the PC is
disconnected.
(Since the number of ports in the IMP-400UHD is seven, ports are occupied permanently if the PC is turned
off while connections are valid. To prevent this, the IMP-400UHD disconnects connections if no
communication command is sent from the PC side.)

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3 Command
3.1 Command outline
A command consists of “@” (“40” in hexadecimal), 3 one-byte alphabetical characters (upper and lower
cases), and parameters (one-byte numbers*). For some commands, several parameters can be specified or
no parameter is required. Processing is executed by sending a delimiter at the end of the command.
Example: @SSW,2
“,”( a comma, “2C” in hexadecimal) is indicated between a command and parameter and between two
parameters.
: delimiter CR LF (return+line feed, “0D”and “0A”in hex)
■If there is an error:
An error command is returned if an undefined command or wrong parameter is included.
Example:@SSW,5
@ERR,1
■Using as HELP:
If only delimiter is sent, command list as the help command is returned.
Example:
--------------- HELP (1/8) ---------------
(CHANNEL SELECT Command)
@GSW / @SSW : Get/Set Input Channel
@GCP / @IOS : Get/Set Input Channel
--------------- HELP (2/8) ---------------
(INPUT SETTING Command)
@GDT / @SDT : Get/Set Digital Input Signal Detect Time
@GHE / @SHE : Get/Set HDCP Input Enable
@GAU / @SAU : Get/Set Auto Switching On
@GOF / @SOF : Get/Set Auto Switching Off

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3.2 Command list
■Error status
Command
Feature
Page
@ERR
Error status
14
■Input channel setting
Command
Feature
Page
@GSW / @SSW
Input channel
14
@GCP / @IOS
Input channel switching (For the previous model)
15
■Input setting
Command
Feature
Page
@GDT / @SDT
No-signal-input monitoring
15
@GHE / @SHE
HDCP input enabled/disabled
16
■Switching setting
Command
Feature
Page
@GAU / @SAU
Priority of input channel automatic switching (OFF to ON)
16
@GOF / @SOF
Priority of input channel automatic switching
17
@GMT / @SMT
Masking time after automatic switching of input channel
17
@GST / @SST
Sequence switching mode
18
@GSQ / @SSQ
Target channel for sequence switching mode
18
@GIT / @SIT
Switching interval for sequence switching mode
19
@GSD / @SSD
Input detection
19
@GSC / @SSC
Starting channel of sequence switching mode
20
■Output setting
Command
Feature
Page
@GDM / @SDM
Output mode
21
@GCO / @SCO
Sink device EDID check
21
@HAU
HDCP re-encryption
22
■Audio setting
Command
Feature
Page
@GAM / @SAM
Audio output mute
22
■Contact input
Command
Feature
Page
@GFP / @SFP
Chattering reduction time of contact input
23

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■EDID
Command
Feature
Page
@GVF / @SVF
EDID
24
@GDI / @SDI
Deep Color input
25
@GAF / @SAF
Audio format
26
@GSP / @SSP
The number of speakers
28
@RME
EDID copy
28
■RS-232C setting
Command
Feature
Page
@GCT / @SCT
RS-232C
29
■LAN setting
Command
Feature
Page
@GIP / @SIP
IP address
30
@GSB / @SSB
Subnet mask
30
@GLP / @SLP
TCP port number
31
@GMC
MAC address
31
■Startup setting
Command
Feature
Page
@GMU / @SMU
Startup input channel
32
@GSO / @SSO
Startup operation lock
32
■Other setting
Command
Feature
Page
@GLS / @SLS
Operation lock
33
@GBZ / @SBZ
Buzzer
33
■Status display
Command
Feature
Page
@GSS
Displaying input signal status / sink device status
34
@GES
Monitor’s EDID
38
@GIV
Version
39

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3.3 Detailed description
3.3.1 Error status
@ERR
Error status
Description
Response in case the command is not executed.
Response
@ERR, error
Parameter
error:Error status
1 = Erroneous parameter format or value
2 = Undefined command or wrong format
3 = The command cannot be used. Sequence switching mode is being operated.
4 = Not used.
5 = Not used.
6 = Not used.
7 = Not used.
8 = Loading EDID from the sink device failed.
Getting example
Command @AAA
Response @ERR,2
@AAA is sent.
Command format error.
Remarks
－
3.3.2 Selecting input channel
@GSW / @SSW
Input channel switching
Getting
Command
@GSW
Response
@GSW, input
Setting
Command
@SSW, input
Response
@SSW, input
Parameter
Input: Input channel
0 = OFF, 1 = IN1 to 4 = IN4
[Default] OFF
Getting
example
Command
Response
@GSW
@GSW,2
Description
Getting the input channel that is assigned to OUT.
IN2
Setting
example
Command
Response
@SSW,1
@SSW,1
Description
Setting OUT’s input channel to IN1.
Remarks
－

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@GCP / @IOS
Input channel switching (For the previous model)
Getting
Command
@GCP
Response
@GCP, input
Setting
Command
@IOS, input
Response
@IOS, input
Parameter
input: Input channel
0 = OFF, 1 = IN1 to 4 = IN4
[Default] OFF
Getting
example
Command
Response
@GCP
@GCP,2
Description
Getting the input channel that is assigned to OUT.
IN2
Setting
example
Command
Response
@IOS,1
@IOS,1
Description
Setting OUT’s input channel to IN1.
Remarks
－
3.3.3 Input setting
@GDT / @SDT
No-signal-input monitoring
Getting
Command
@GDT
Response
@GDT, time_1, time_2, time_3, time_4
Setting
Command
@SDT, ch_1, time_1 (, ch_2, time_2･･･)
Response
@SDT, ch_1, time_1 (, ch_2, time_2･･･)
Parameter
time_1-4: No-signal-input monitoring
0 = OFF, 2000 = 2 sec. to 15000 = 15 sec.
[Default] 10000 = 10 sec.
Set the value by 100 ms. If you set a value other than 0 for the lower 2 digits,
these values will be rounded down.
(For example, if you set it to 2955, the monitoring time is set to 2900 ms.)
ch_1-4: Input channel
0 = All inputs, 1 = IN1 to 4 = IN4
Getting
example
Command
Response
@GDT
@GDT,6000,10000,10000,4000
Description
Getting the set monitoring time.
IN1: 6000 ms. (6 sec.), IN2 and IN3: 10000 ms. (10 sec.), IN4: 4000 ms. (4
sec.)
Setting
example
Command
Response
@SDT,3,6000
@SDT,3,6000
Description
Setting the monitoring time of IN3 to 6000 ms. (6 sec.).
Remarks
－

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@GHE / @SHE
HDCP input enabled/disabled
Getting
Command
@GHE
Response
@GHE, hdcp_1, hdcp_2, hdcp_3, hdcp_4
Setting
Command
@SHE, ch_1, hdcp_1 (, ch_2, hdcp_2･･･)
Response
@SHE, ch_1, hdcp_1 (, ch_2, hdcp_2･･･)
Parameter
hdcp_1-4: HDCP input enabled/disabled
0 = DISABLE, 1 = HDCP 1.4, 2 = HDCP 2.2
[Default] HDCP 2.2
ch_1-4: Input channel
0 = All inputs, 1 = IN1 to 4 = IN4
Getting
example
Command
Response
@GHE
@GHE,2,2,0,2
Description
Getting HDCP input enabled/disabled.
IN3: disables HDCP input, other input channels: enables HDCP 2.2 input
Setting
example
Command
Response
@SHE,1,0
@SHE,1,0
Description
Setting IN1 HDCP input to disabled.
Remarks
－
3.3.4 Switching setting
@GAU / @SAU
Priority of input channel automatic switching (OFF to ON)
Getting
Command
@GAU
Response
@GAU, in1_priority, in2_priority, in3_priority, in4_priority
Setting
Command
@SAU, in1_priority, in2_priority･･･, in4_priority
Response
@SAU, in1_priority, in2_priority･･･, in4_priority
Parameter
in1_priority - in4_priority: Priority
0 = OFF, 1 = Priority (high) to 4 = Priority (low)
[Default] OFF
Getting
example
Command
Response
@GAU
@GAU,1,2,3,4
Description
Getting the set priority (OFF to ON).
IN1>IN2>IN3>IN4
Setting
example
Command
Response
@SAU,4,3,2,1
@SAU,4,3,2,1
Description
Setting the priority to IN4>IN3>IN2>IN1.
Remarks
－

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@GOF / @SOF
Priority of input channel automatic switching (ON to OFF)
Getting
Command
@GOF
Response
@GOF, in1_priority, in2_priority, in3_priority, in4_priority
Setting
Command
@SOF, in1_priority, in2_priority･･･, in4_priority
Response
@SOF, in1_priority, in2_priority･･･, in4_priority
Parameter
in1_priority - in4_priority: Priority
0 = OFF, 1 = Priority (high) to 4 = Priority (low)
[Default] OFF
Getting
example
Command
Response
@GOF
@GOF,1,2,3,4
Description
Getting the set priority (ON to OFF).
IN1>IN2>IN3>IN4
Setting
example
Command
Response
@SOF,4,3,2,1
@SOF,4,3,2,1
Description
Setting the priority to IN4>IN3>IN2>IN1.
Remarks
－
@GMT / @SMT
Masking time after automatic switching of input channel
Getting
Command
@GMT
Response
@GMT, time
Setting
Command
@SMT, time
Response
@SMT, time
Parameter
time: Masking time
0 = 0 to 999999 = 999.999 sec.
[Default] 0 sec.
Getting
example
Command
Response
@GMT
@GMT,2000
Description
Getting the set masking time after automatic switching of input channel.
Automatic switching cannot be executed for 2000 ms. (2 sec.).
Setting
example
Command
Response
@SMT,2000
@SMT,2000
Description
Setting the masking time to 2000 ms. (2 sec.)
Remarks
－

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@GST / @SST
Sequence switching mode
Getting
Command
@GST
Response
@GST, mode
Setting
Command
@SST, mode
Response
@SST, mode
Parameter
mode: Sequence switching mode
0 = OFF, 1 = ON
[Default] OFF
Getting
example
Command
Response
@GST
@GST,0
Description
Getting the set sequence switching mode.
OFF
Setting
example
Command
Response
@SST,1
@SST,1
Description
Setting the sequence switching mode to ON.
Remarks
－
@GSQ / @SSQ
Target channel for sequence switching mode
Getting
Command
@GSQ
Response
@GSQ, select_1, select_2, select_3, select_4
Setting
Command
@SSQ, ch_1, select_1 (, ch_2, select_2･･･)
Response
@SSQ, ch_1, select_1 (, ch_2, select_2･･･)
Parameter
select_1-4: Setting whether the channel is switched or not.
0 = Not switched, 1 = Switched [Default] 1 (Switched)
ch_1-4: Input channel
0 = All inputs, 1 = IN1 to 4 = IN4
Getting
example
Command
Response
@GSQ
@GSQ,1,1,1,0
Description
Getting the set mode status.
IN1 to IN3 will be switched.
Setting
example
Command
Response
@SSQ,1,0
@SSQ,1,0
Description
IN1 will not be switched.
Command
Response
@SSQ,0,0
@ERR,1
Description
Error, because all input channels are set to OFF.
Remarks
－

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@GIT / @SIT
Switching interval for sequence switching mode
Getting
Command
@GIT
Response
@GIT, time
Setting
Command
@SIT, time
Response
@SIT, time
Parameter
time: Switching interval
10000 = 10 to 30000 = 30 sec.
[Default] 10 sec.
Getting
example
Command
Response
@GIT
@GIT,20000
Description
Getting set switching interval.
20 sec.
Setting
example
Command
Response
@SIT,15000
@SIT,15000
Description
Setting the switching interval to 15 sec.
Remarks
－
@GSD / @SSD
Input detection
Getting
Command
@GSD
Response
@GSD, detect
Setting
Command
@SSD, detect
Response
@SSD, detect
Parameter
detect: Channels that is detected will be switched in sequence switching mode.
0 = All input channels will be switched.
1 = Only channels that is detected will be switched.
[Default] Only channels that is detected will be switched.
Getting
example
Command
Response
@GSD
@GSD,0
Description
Getting the setting.
All input channels will be switched in sequence switching mode..
Setting
example
Command
Response
@SSD,1
@SSD,1
Description
Only channels that is detected will be switched in sequence switching mode..
Remarks
－

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@GSC / @SSC
Starting channel of sequence switching mode
Getting
Command
@GSC
Response
@GSC, select
Setting
Command
@SSC, select
Response
@SSC, select
Parameter
select: Starting channel
0 = Starts from the current input channel
1 = Starts from the lowest target channel
[Default] 0 (Starts from the current input channel)
Getting
example
Command
Response
@GSC
@GSC,1
Description
Getting the starting channel.
Starts from the lowest target channel
Setting
example
Command
Response
@SSC,0
@SSC,0
Description
Setting the mode to start from the current input channel
Remarks
－