User`s guide

3 Using the Source Functions
74 Model N6705 User’s Guide
Configuring Advanced Protection
Press the Settings key to access the Source Settings window.
Navigate to and select Protection. Navigate to and select Advanced.
All Outputs – for all outputs you can program the Inhibit input
(digital pin 3) on the rear panel to act as an external protection
shutdown signal. The behavior of this signal can be set to either
Latched or Live (non-latched). Off disables the remote inhibit. Refer
to Appendix C for further information.
Watchdog – for all outputs you can program a watchdog timer
function. The output watchdog timer causes all outputs to go into
protection mode if there is no SCPI I/O activity on the remote
interfaces (USB, LAN, GPIB) within the user-specified time period.
Note that the watchdog timer function is NOT reset by activity on the
front panel or when using the Web server – the outputs will still shut
down after the time period has elapsed.
After the time period has expired, the outputs will be disabled, but
the programmed output state is not changed. This condition is
annunciated on the front panel by the Prot status. The delay is
programmable from 1 to 3600 seconds in 1 second increments.
Enable Oscillation Protection - This is only available on Agilent
Models N678xA SMU. If open sense leads or capacitive loads outside
the allowable range cause the output to oscillate, the oscillation
protection function detects the oscillation and latches the output off.
The condition is annunciated on the front panel by the Osc status.
From the remote interface:
To program the INH signal to act as an external shutdown:
DIG:PIN3:FUNC INH
To configure the pin polarity for pin 3:
DIG:PIN3:POL POS
To enable the watchdog timer function and set the delay to 15
minutes (900 seconds):
OUTP:PROT:WDOG ON
OUTP:PROT:WDOG:DEL 900
To enable output oscillation protection:
OUTP:PROT:OSC ON, (@1)