Audio-video switch

Description

The AVS is an audio/video switchbox which allows the user to direct any of the 4 video inputs to any of the 4 video outputs by pushing some buttons and without hassling around with cables.

The standard use of the AVS is to control the video source shown to the participant in the scanner room. Usually the left monitor of the stimulus PC is mirrored to the monitor unit in the scanner room while the right monitor of the stimulus PC is used for paradigm control. The AVS allows connecting and selecting an external video source to be displayed in the scanner room.

Device

AVS-HDMI2-4x4 (Black Box)

Operation

The AVS is installed at the top of BOX. It is powered by the main power supply of the BOX. All video is HDMI based. For HDMI embedded digital audio, see in Audio system section.

Front panel

The input-output mapping can be programmed on the front panel of the AVS which can be found at the top of the BOX.

Number	Component	Description
1	Firmware	USB port for upgrading firmware
2	Power LED	• Lights red when power is ON • Turns green in standby mode • Blinks red when upgrading
3	IR sensor	Built-in IR sensor, receives IR signal sent from IR remote
4	LCD screen	Displays real-time operation status
5	INPUT selector buttons	Press one of these buttons to switch the input source
6	OUTPUT selector buttons	Press one of these buttons to select the output channel

Input/Output Switching

The front panel features four input selection buttons and four output selection buttons for input/output switching. The channel configuration is described in the table below. This overview can also be found on the BOX just above the AVS.

CHANNEL	1	2	3	4
INPUTS	Stimulus PC 1	Stimulus PC 2	VID/I1	VID/I2
OUTPUTS	Monitor 1	Monitor 2	Projector	LCD monitor

Note

The LCD projector will replace the projector that will be stored as backup system. The channels will be preserved for future use.

To switch one input to an output:

Example: Input 1 to Output 3

→ Press INPUTS 1 + OUTPUTS 3
To switch one input to multiple outputs:

Example: Convert Input 2 to Output 3 and 4

→ Press INPUTS 2 + OUTPUTS 3 + OUTPUTS 4
To switch multiple inputs to multiple outputs:

→ Repeat the steps above as applicable.

For the setup at GIfMI:

For the standard setup using the stimPC

→ Press INPUTS 1 + OUTPUTS 1 + OUTPUTS 4

→ Press INPUTS 2 + OUTPUTS 2
For the standard setup using an external PC

→ Press INPUTS 3 + OUTPUTS 4

Note

LED indicators for the pressed buttons will blink green three times and turn off if the switching was successful. If the switching failed, they will be off immediately. Wait until the LED indicators are off before configuring a next input/output!

The AVS can also be programmed using the built-in webserver or the RS232 serial communication protocol. Check the manual for more information.

Connecting an external video source

The AVS has two available inputs for external video sources.

Connect your device using an HDMI cable to the VID/I1 or VID/I2 connectors on the BOX. There are adapters on the market to convert your video source the HDMI.
Configure the AVS to your desire on the front panel.
Make sure the video output is detected on your device.

Specifications

SPECIFICATION	DESCRIPTION
Input
Input Signal	(4) HDMI
Input Connector	(4) HDMI Type A female
Output
Output	(4) HDMI, (4) SPDIF audio
Output Connector	(4) HDMI Type A female, (4) coax
Control
Control Signal	(1) IR IN, (1) TCP/IP, (1) RS-232
Control Connector	(1) 3.5-mm mini jack, (1) RJ-45 female, (1) 3-pin pluggable terminal block
Video Signal	HDMI 2.0 and HDCP 2.2
Audio Signal	Dolby Digital, DTS, DTS-HD
Power
AC Adapter Input	Power 100 to 240 VAC, 50/60 Hz
Input Power 24 VDC,	1.25 A
Power Consumption	14 W (max.)
General
EDID Management	Built-in EDID data and manual EDID management
Resolution	640 x 480 @ 60 Hz, 4K x 2K @ 60 Hz 4:4:4, 1080p 3D
HDMI Cable Length	< or = 1.5 ft. (5 m)
Operating Temperature	14 to 131° F (-10 to 55° C)
Humidity	10 to 90% relative humidity
Dimensions	1.7" H x 17.2" W x 9.3 D (4.4 x 43.7 x 23.6 cm)
Weight	3.8 lb. (1.75 kg)