GW Instek GDM-8251, User Manual

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DIGITAL I/O
89
Application: External trigger
Background
GDM-8200 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
COM
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.
GDM-8200 Series User Manual
90
R
EMOTE CONTROL
Interface Overview ................................................................91
Configure USB interface .........................................91
Configure RS-232C interface...................................92
Configure GPIB interface........................................93
Command Syntax Command Syntax ...................................................95
Command Set MEASure command ...............................................96
CONFigure command ............................................96
SENSe command ...................................................97
UNIT command .....................................................98
TRIGger command ............................................... 100
SYStem related command .................................... 101
STAtus reporting command ................................. 101
RS-232C interface command ................................ 101
IEEE 488.2 common command ............................ 102
ROUTe command ................................................. 102
MEASure2 command............................................ 103
CONFigure2 command ........................................ 103