Hardware
2-4
USB 4113/ basicCON 4113 – User Manual
2.3
Construction and Function
The
USB 4113
splitter board (also used for
basicCON 4113
) distributes
the LVDS input signal (ANSI TIA/EIA-644) among any number of the
four LVDS outputs.
Moreover, the signal is regenerated by the repeaters on the board.
Additionally, a control signal (e.g. CAN/LIN) is distributed.
By cascading resp. interconnecting several
USB 4113
boards with each
other it is possible to create a 1 to 64 splitter.
But we advise not to chain more than three splitters.
(As otherwise too much jitters would be on the LVDS signal.
Then no error-free transmission can be ensured.)
All boards have five HF connections at the frontal panel to connect the
LVDS cables.
At the rear side of the
USB 4113
board there is a 132 poles backplane
connector for connecting the board in a
GOEPEL electronics
USB Rack.
The
basicCON 4113
has a USB-B connector and connections for
external power supply.
If required, a Hardware Initialization can be carried out by means of
the switches on the board.
In Figure 2-4 you can see that there is a switch
1
..
4
for each of the
LVDS Out1
..
LVDS Out4
output channels.
After switching on, when the Host Mode has not been activated, yet,
the device distributes the input signal as follows:
If all switches are switched OFF, the LVDS outputs are also switched
OFF.
If one switch is switched ON, the signal of the belonging input is
conducted to the corresponding output.
In the case several switches are switched ON, the input signal is
distributed among these several outputs.
1
2
3
4
ON
After the activation of the Host Mode, the switches are not active and
control is effected via USB. In the delivery state, all switches are
switched OFF.
If required, the switches should be set as needed before the
installation process. Due to this initialization, also an operation of the
Splitter board without software control is possible. For this, the board
must be powered in the
USB rack
.
Activate the Host Mode by G-API command
G_Lvds_Splitter_HostControlMode_Set
.
Please refer to the
G-API User Manual
regarding this command
and further G-API commands for the control of your
USB 4113
/
basicCON 4113
module.
2.3.1
General
2.3.2
Hardware
Initialization
Figure 2-4:
Switches for Initialization
