BNC 555 Series, User Manual, Page: 20 / 47

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Gate/Trigger Mode
• MODE Selects external input usage for controlling To: disabled, edge
triggered or level gated.
• THRESHOLD Sets the voltage threshold for the external input. This level is
applied to all uses of the external input.
• EDGE Selects rising or falling edge for the trigger mode.
• POLARITY Selects active high or active low in the gated mode.
*NOTE: When the gate disables the System Timer, the timer is reset. The gate
edge to enable the timer will restart the System Timer, which synchronizes the
To pulse to the gate and minimizes jitter relative to the gate. The trigger
threshold applies to all uses, channel and system, of the trigger/gate input.
SYSTEM Menu
SYSTEM Menus
Computer Communication Parameters
• BAUD RATE Selects the baud rate for the RS232 interface.
• ECHO Selects whether to echo characters back to the host computer
or not.
• GPIB ADDRESS Selects the GPIB address.
*NOTE: The unit will not respond to computer commands unless the appro-
priate BAUD rate or GPIB address is selected.
Comm. Parameters
Keypad
Parameters
Misc. Parameters
Baud Rate Key Repeat Rate
Echo Enable Key Volume Decimal Mark
GPIB Address Knob Volume LCD Brightness
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