Theta Digital Generation VIII Series 3, Руководство пользователя

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14
The
REMOTE POWER jack on the rear panel can be either an input, to allow another device to take the
Generation VIII out of standby, or an output, which will allow the Generation VIII to take another device out of
standby. Either way this jack is setup, it utilizes 12V and can be programmed for either straight
DC or a PULSE .
The Generation VIII’s default is a DC Output.
The trigger is activated/deactivated by the
STANDBY button.
Pressing
SETUP and then the # 5 button 3 times will display the Remote Trigger menu shown in Figure 13.
Press button #
1 to select the trigger type parameter. Use the LEVEL UP / DOWN buttons to change the value.
The default trigger parameter is set to have the trigger send a signal ( Out ), that is 12V DC .
Pressing LEVEL UP once changes the out trigger to a Pulse .
Press LEVEL UP again to change the trigger to Receive a DC signal.
Pressing LEVEL UP again changes the Receive trigger to respond to a Pulse.
Press the SETUP button once to exit the menu.
When using a pulse In or Out, the pulse duration can be changed to match the device being triggered. Typically
50mS will work for most devices. When determining the
Pulse value, refer to the specifications of the device that
is connected to the Generation VIII’s Remote Trigger jack and match that type and value.
The trigger circuit is current limiting. The current limiting resistor is 33 ohms (0. 5W). This means that the more
current a device to be triggered draws, the more the output voltage gets reduced. The formula is: Output voltage
=12 – (I x 33), where I = the current draw from the triggered device, in Amperes. Refer to the device’s manual for
this information. The Generation VIII’s maximum output current is 100mA, which, by using the above formula,
means that with a 100mA draw, the output voltage will be 8.7 volts, although most triggered circuits have virtually
no current draw.
RS232
This menu allows the user to set up the control parameters required for RS232 protocol interaction.
Pressing
SETUP and the # 5 button 4 times bring up the menu shown in Figure 14.
Figure 14 - Front Panel Display of the RS 232 SETUP menu
The default and best and recommended baud rate of the Generation VIII is
57600 . This can be changed by
selecting button # 2 and using the LEVEL UP / DOWN buttons. The range of baud rates is: 4800 , 9600 , 19200 ,
38400 , 57600 and 115200 .
Set the Baud
Rate to match that of the device that is controlling/communicating with the Generation VIII.
Press the
SETUP button once to exit the menu.
The Generation VIII can be set to automatically send changes to the RS232 port. This can be done by setting the
EchoStatus parameter (button # 4 ) to On . This means if any Generation VIII parameter changes, all RS232
bytes will be sent to the RS232 port. This is useful for monitoring master level, input, etc. when the user has
access to both the Generation VIII and the touch-panel controller, to keep them synchronized. If the user does
not require any data to be sent out of the RS232 port, then set the
EchoStatus parameter to Off .