GARDASOFT RC100 - Triggering; Trigger Input Options

RC1xx - User Manual
7.2 Triggering
Trigger pulses should have a minimum pulse width of 2µs. You can set the
sense of the RC1xx trigger input. Do this by setting the P flag from the front
panel (see Section 10.2, Front panel commands), the web page (see
Section 9, Webpage configuration (RC120)) or the RE command (see
Section 10.3.3, General commands). The effect of setting the P flag is
summarised below:
Mode P Flag Output
Continuous Unused Output is on.
Switched P Flag = 1
Output is off when trigger is off,
Output is on when trigger is on.
P Flag = 0
Output is on when trigger is off,
Output is off when trigger is on.
Pulsed P Flag = 1 Pulse is triggered on rising edge.
P Flag = 0 Pulse is triggered on falling edge.
Note: The P flag inverts the sense of the trigger.
7.2.1 Trigger input options
You can connect the following types of trigger to the Smart Input:
3V to 24V voltage source
Any voltage between 0V and 0.9V
is taken as logic 0.
Any voltage between 3V and 24V
is taken as logic 1.
TTL signal
You can connect a TTL signal to
the RC1xx's input. However, a
3.3V TTL signal only works if it can
drive 8kohm without dropping
below 2.7V.
If the P flag is set to ‘1’, the RC1xx
output turns on when the TTL
driver goes HIGH. To reverse this,
set the P flag to ‘0’ (see Section
7.2, Triggering).
— 13 —