GW Instek GDM-8200A User Manual - Manual (Page 94)

GDM-8200A Series User Manual
94
Application: External trigger
Background The GDM-8200A series uses the internal trigger by
default, for example to count the frequency and the
period. Using an external trigger allows customized
triggering condition.
Signal
connection Connect the external trigger signal to the Digital I/O
port located on the rear panel.
1 2 3 4 5
6 7 8 9 FAIL Out
HIGH Limit FAIL Out
LOW Limit FAIL Out
EOM Out
VCC Out
NC
Digital (Chassis) Ground
External Trigger In
PASS Out
Pin4 External Trigger Input pin
1. Activate
external trigger Press the Shift key followed by the
TRIG key. The EXT indicator
appears on the display.
2. Start trigger Press the TRIG key to start
triggering manually. The
indicator turns On.
Reading indicator The reading indicator stays On before triggering.
After triggering, the indicator flashes according to the
external signal trigger timing.
Exit external
trigger Press the Shift key followed by the
TRIG key. The EXT indicator
disappears and the trigger goes back
to internal mode.